International Journal of Polymer Analysis and Characterization最新文献_第7页

Surface reactivity of polypropylene grafted with carboxylate groups (COO−) in the competitive adsorption of Pb2+, Cu2+, and Cd2+ in aqueous solution 羧酸基接枝聚丙烯（COO−）在水溶液中竞争吸附Pb2+、Cu2+和Cd2+时的表面反应性

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-03-01 DOI: 10.1080/1023666X.2025.2470944

Mariela Molina Jacinto , Karen Estefanía Zárate-Rodríguez , Rosa María Gómez-Espinosa

In this study, we developed a new material (PPAAcO⁻Na⁺) charge with carboxylate groups to remove metal ions (Pb²⁺, Cd²⁺, and Cu²⁺) through ion exchange of multimetal solutions, (PPAAcO)_nM²⁺. The polymeric surface of polypropylene (PP) was functionalized with carboxylate groups (PPAAcO⁻Na⁺) through grafting and the acid-base reaction of carboxylic acid (PPAA). FTIR-ATR corroborated the change of –COOH (1711 cm⁻¹) to COO⁻Na⁺ (1562 cm⁻¹) on functionalized PP. TGA-DSC showed a decrease in the melting energy of PPAA (75.09 J/g) and PPAAcO⁻Na⁺ (44.98 J/g). The effect of the grafting degree of COO⁻ and its relationship with the concentration of acrylic acid (AA) was studied with grafting of 30%, 80%, and 154% on PPAAcO⁻Na⁺. SEM-EDS evidenced the relationship of the AA concentration, showing a thickening of the PPAAcO⁻Na⁺ fibers. The performance of PPAAcO⁻Na⁺ as a function of the grafting degree in the removal of Pb²⁺, Cd²⁺, and Cu²⁺, showed the following trend: Pb²⁺>Cd²⁺>Cu^2+, achieving an efficiency greater than 90%. The fast adsorption of the metallic ions (120 min) suggests an ion exchange process, promoting a chemical interaction between PPAAcO⁻Na⁺ and the metallic ions, resulting in a polymer-metal complex (PPAAcO)_nM²⁺. PPAAcO⁻Na⁺ has the potential to be a new, easily obtained material capable of coordinating and stabilizing metal ions on its surface.

在这项研究中，我们开发了一种新的材料（PPAAcO - Na+），带羧酸基，通过多金属溶液的离子交换去除金属离子（Pb2+, Cd2+, Cu2+），（PPAAcO）nM2+。通过接枝和羧酸（PPAA）的酸碱反应，聚丙烯（PP）的聚合物表面被羧酸基团（PPAAcO−Na+）功能化。FTIR-ATR证实了功能化PP上-COOH （1711 cm−1）变为COO−Na+ (1562 cm−1)的变化，TGA-DSC显示PPAA和PPAAcO−Na+ (44.98 J/g)的熔化能降低。在PPAAcO−Na+接枝率为30%、80%和154%的情况下，研究了COO−接枝度对PPAAcO−Na+的影响及其与丙烯酸（AA）浓度的关系。SEM-EDS证实了AA浓度的关系，显示PPAAcO−Na+纤维增厚。PPAAcO−Na+对Pb2+、Cd2+和Cu2+的去除率随接枝度的变化趋势为：Pb2+>；Cd2+>Cu2+，去除率均大于90%。金属离子的快速吸附（120 min）表明，离子交换过程促进了PPAAcO−Na+与金属离子之间的化学相互作用，从而产生聚合物-金属配合物（PPAAcO）nM2+。PPAAcO−Na+有潜力成为一种易于获得的新型材料，能够在其表面配位和稳定金属离子。

{"title":"Surface reactivity of polypropylene grafted with carboxylate groups (COO−) in the competitive adsorption of Pb2+, Cu2+, and Cd2+ in aqueous solution","authors":"Mariela Molina Jacinto , Karen Estefanía Zárate-Rodríguez , Rosa María Gómez-Espinosa","doi":"10.1080/1023666X.2025.2470944","DOIUrl":"10.1080/1023666X.2025.2470944","url":null,"abstract":"<div><div>In this study, we developed a new material (PPAAcO<sup>−</sup>Na<sup>+</sup>) charge with carboxylate groups to remove metal ions (Pb<sup>2+</sup>, Cd<sup>2+</sup>, and Cu<sup>2+</sup>) through ion exchange of multimetal solutions, (PPAAcO)<sub>n</sub>M<sup>2+</sup>. The polymeric surface of polypropylene (PP) was functionalized with carboxylate groups (PPAAcO<sup>−</sup>Na<sup>+</sup>) through grafting and the acid-base reaction of carboxylic acid (PPAA). FTIR-ATR corroborated the change of –COOH (1711 cm<sup>−1</sup>) to COO<sup>−</sup>Na<sup>+</sup> (1562 cm<sup>−1</sup>) on functionalized PP. TGA-DSC showed a decrease in the melting energy of PPAA (75.09 J/g) and PPAAcO<sup>−</sup>Na<sup>+</sup> (44.98 J/g). The effect of the grafting degree of COO<sup>−</sup> and its relationship with the concentration of acrylic acid (AA) was studied with grafting of 30%, 80%, and 154% on PPAAcO<sup>−</sup>Na<sup>+</sup>. SEM-EDS evidenced the relationship of the AA concentration, showing a thickening of the PPAAcO<sup>−</sup>Na<sup>+</sup> fibers. The performance of PPAAcO<sup>−</sup>Na<sup>+</sup> as a function of the grafting degree in the removal of Pb<sup>2+</sup>, Cd<sup>2+</sup>, and Cu<sup>2+</sup>, showed the following trend: Pb<sup>2+</sup>>Cd<sup>2+</sup>>Cu<sup>2+,</sup> achieving an efficiency greater than 90%. The fast adsorption of the metallic ions (120 min) suggests an ion exchange process, promoting a chemical interaction between PPAAcO<sup>−</sup>Na<sup>+</sup> and the metallic ions, resulting in a polymer-metal complex (PPAAcO)<sub>n</sub>M<sup>2+</sup>. PPAAcO<sup>−</sup>Na<sup>+</sup> has the potential to be a new, easily obtained material capable of coordinating and stabilizing metal ions on its surface.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 4","pages":"Pages 423-440"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The optimization of leaf-structured polyaniline-titanium dioxide composite toward effective photodegradation of reactive black 5 dyes 叶片结构聚苯胺-二氧化钛复合材料对活性黑5染料有效光降解的优化

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-03-01 DOI: 10.1080/1023666X.2025.2470221

Shu-Hui Khor , Michelle Li-Yen Lee , Wan Jefrey Basirun , Joon-Ching Juan , Sook-Wai Phang

The discharge of toxic organic dye from textile industries causes concerning effects on aquatic life, and this raises the urgent need for an effective treatment method that can preserve the environment. Recently, photocatalysis has been widely studied due to its environmentally friendly nature in which hazardous organic compounds can be converted into carbon dioxide and water through solar energy. In this research, polyaniline (PANI) with a leaf micro/nanostructure (L-PANI) is used to form a composite with different weight % (wt %) of titanium dioxide (TiO₂) to be used as a photocatalyst toward the photodegradation of Reactive Black 5 (RB5) dyes. Based on the results, L-PANI with 5 wt %, 10 wt %, 20 wt %, and 30 wt % of TiO₂ showed photodegradation of 44.2%, 48.8%, 41.7%, and 35.5%, respectively toward RB5 dyes. The optimum photodegradation parameters were further studied using L-PANI-TiO₂ (10 wt %), and it was found that a photodegradation efficiency of 98.2% is achieved with 80 min of dark adsorption time, 180 min of light reaction time, 10 ppm of initial RB5 dye concentration, and 25 mg of photocatalyst. To achieve 100% photodegradation of RB5 dye, the light reaction time was extended to 210 mines, and the 10 ppm of RB5 dye was successfully photodegraded to 100% using 25 mg of L-PANI-TiO₂ (10 wt %) photocatalyst. This shows the potency of L-PANI-TiO₂ as an effective photocatalyst toward the photodegradation of RB5 dye.

纺织工业排放的有毒有机染料对水生生物造成了严重的影响，迫切需要一种有效的保护环境的处理方法。近年来，光催化因其环境友好性而受到广泛的研究，其中有害的有机化合物可以通过太阳能转化为二氧化碳和水。本研究利用具有叶片微纳米结构（L-PANI）的聚苯胺（PANI）与不同重量% （wt %）的二氧化钛（TiO2）组成复合材料，作为光催化剂用于活性黑5 （RB5）染料的光降解。结果表明，当TiO2含量为5 wt %、10 wt %、20 wt %和30 wt %时，L-PANI对RB5染料的光降解率分别为44.2%、48.8%、41.7%和35.5%。以L-PANI-TiO2 （10 wt %）为催化剂，在暗吸附时间为80 min，光反应时间为180 min， RB5初始浓度为10 ppm，光催化剂用量为25 mg的条件下，进一步研究了最佳光降解参数，光降解效率为98.2%。为了实现RB5染料的100%光降解，将光反应时间延长至210矿，使用25 mg L-PANI-TiO2 （10 wt %）光催化剂，将10 ppm的RB5染料成功地光降解至100%。这表明L-PANI-TiO2作为光降解RB5染料的有效光催化剂的潜力。

{"title":"The optimization of leaf-structured polyaniline-titanium dioxide composite toward effective photodegradation of reactive black 5 dyes","authors":"Shu-Hui Khor , Michelle Li-Yen Lee , Wan Jefrey Basirun , Joon-Ching Juan , Sook-Wai Phang","doi":"10.1080/1023666X.2025.2470221","DOIUrl":"10.1080/1023666X.2025.2470221","url":null,"abstract":"<div><div>The discharge of toxic organic dye from textile industries causes concerning effects on aquatic life, and this raises the urgent need for an effective treatment method that can preserve the environment. Recently, photocatalysis has been widely studied due to its environmentally friendly nature in which hazardous organic compounds can be converted into carbon dioxide and water through solar energy. In this research, polyaniline (PANI) with a leaf micro/nanostructure (L-PANI) is used to form a composite with different weight % (wt %) of titanium dioxide (TiO<sub>2</sub>) to be used as a photocatalyst toward the photodegradation of Reactive Black 5 (RB5) dyes. Based on the results, L-PANI with 5 wt %, 10 wt %, 20 wt %, and 30 wt % of TiO<sub>2</sub> showed photodegradation of 44.2%, 48.8%, 41.7%, and 35.5%, respectively toward RB5 dyes. The optimum photodegradation parameters were further studied using L-PANI-TiO<sub>2</sub> (10 wt %), and it was found that a photodegradation efficiency of 98.2% is achieved with 80 min of dark adsorption time, 180 min of light reaction time, 10 ppm of initial RB5 dye concentration, and 25 mg of photocatalyst. To achieve 100% photodegradation of RB5 dye, the light reaction time was extended to 210 mines, and the 10 ppm of RB5 dye was successfully photodegraded to 100% using 25 mg of L-PANI-TiO<sub>2</sub> (10 wt %) photocatalyst. This shows the potency of L-PANI-TiO<sub>2</sub> as an effective photocatalyst toward the photodegradation of RB5 dye.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 4","pages":"Pages 408-422"},"PeriodicalIF":1.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From carbon inspiration to energy innovation: epoxy nano-composites for thermal and dielectric excellence 从碳灵感到能源创新：环氧纳米复合材料的热和介电性能卓越

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-02-25 DOI: 10.1080/1023666X.2025.2466582

Gurukarthik Babu Balachandran , Muthu Eshwaran Ramachandran , Hariharasudhan Thangaraj , Anandha Balaji Alexander

In recent years, polymer dielectrics have revolutionized several electrical and related fields. As inductive devices, transformers produce a lot of heat, which makes them susceptible to damage at high voltages and after prolonged use. In this case, an epoxy polymer matrix with nano reinforcement is examined to investigate its potential to enhance a dry-type transformer winding’s cooling and thermal conductivity. The polymer composite consists of nanocarbon blended with epoxy resin to produce a high thermal conductivity composite. Through the incorporation of a range of nanocarbon particles (2%, 4%, 6%, 8%, and 10%), the epoxy resin matrix was modified. Using central composite design optimization, the polymer composite’s composition is also evaluated for optimal performance. In addition, dielectric strength, thermal conductivity, Izod impact, tensile, water absorption tests, thermogravimetric analysis, and morphological studies were conducted for the optimized value from response surface methodology. It was found that the dielectric strength was 145 V/mm, thermal conductivity was 0.45 W/m.K, and Izod impact was 0.6 (J/mm) for the optimized sample. Finally, insulation temperature tests were conducted on a 0.5-kVA dry-type transformer for a prepared sample and compared with the normal winding. The rate of decrease of insulation temperature was found to be 24.4%. The composite increased insulation performance and verified its reliability as a solid coolant. Dry-type transformers in remote microgrids distribute energy from renewable sources like solar and wind energy systems.

近年来，聚合物电介质已经彻底改变了几个电气和相关领域。变压器作为感应装置，会产生大量的热量，这使得变压器在高压下和长时间使用后容易损坏。在这种情况下，研究了具有纳米增强的环氧聚合物基体，以研究其增强干式变压器绕组的冷却和导热性的潜力。该聚合物复合材料由纳米碳与环氧树脂共混组成，以产生高导热复合材料。通过掺入一系列纳米碳颗粒（2%、4%、6%、8%和10%），环氧树脂基体被改性。采用中心复合材料设计优化，对聚合物复合材料的组成进行了最优性能评价。此外，通过介质强度、导热系数、Izod冲击、拉伸、吸水率、热重分析和形态学研究，对响应面法的优化值进行了研究。结果表明，该材料的介电强度为145 V/mm，导热系数为0.45 W/m。K，最佳样品的Izod影响为0.6 （J/mm）。最后，对制备好的0.5 kva干式变压器样品进行了绝缘温度试验，并与普通绕组进行了比较。保温温度的下降速率为24.4%。复合材料提高了绝缘性能，并验证了其作为固体冷却剂的可靠性。远程微电网中的干式变压器分配来自太阳能和风能等可再生能源系统的能源。

{"title":"From carbon inspiration to energy innovation: epoxy nano-composites for thermal and dielectric excellence","authors":"Gurukarthik Babu Balachandran , Muthu Eshwaran Ramachandran , Hariharasudhan Thangaraj , Anandha Balaji Alexander","doi":"10.1080/1023666X.2025.2466582","DOIUrl":"10.1080/1023666X.2025.2466582","url":null,"abstract":"<div><div>In recent years, polymer dielectrics have revolutionized several electrical and related fields. As inductive devices, transformers produce a lot of heat, which makes them susceptible to damage at high voltages and after prolonged use. In this case, an epoxy polymer matrix with nano reinforcement is examined to investigate its potential to enhance a dry-type transformer winding’s cooling and thermal conductivity. The polymer composite consists of nanocarbon blended with epoxy resin to produce a high thermal conductivity composite. Through the incorporation of a range of nanocarbon particles (2%, 4%, 6%, 8%, and 10%), the epoxy resin matrix was modified. Using central composite design optimization, the polymer composite’s composition is also evaluated for optimal performance. In addition, dielectric strength, thermal conductivity, Izod impact, tensile, water absorption tests, thermogravimetric analysis, and morphological studies were conducted for the optimized value from response surface methodology. It was found that the dielectric strength was 145 V/mm, thermal conductivity was 0.45 W/m.K, and Izod impact was 0.6 (J/mm) for the optimized sample. Finally, insulation temperature tests were conducted on a 0.5-kVA dry-type transformer for a prepared sample and compared with the normal winding. The rate of decrease of insulation temperature was found to be 24.4%. The composite increased insulation performance and verified its reliability as a solid coolant. Dry-type transformers in remote microgrids distribute energy from renewable sources like solar and wind energy systems.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 4","pages":"Pages 377-392"},"PeriodicalIF":1.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on water properties and spatial structure of water in poly(2-methoxy ethylacrylate)s with different molecular weights by nuclear magnetic resonance spectroscopy 核磁共振波谱法研究不同分子量聚（2-甲氧基乙基丙烯酸酯）中水的性质及水的空间结构

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-02-23 DOI: 10.1080/1023666X.2025.2467164

Akira Mochizuki , Yuko Miwa , Konatsu Yoneyama , Chie Yahata , Yoshiki Oda

Poly(2-methoxyethyl acrylate) (PMEA) is known for its favorable blood compatibility, attributed to its unique intermediate water content, as identified by differential scanning calorimetry. Previously, we reported that PMEA contains two types of water—upfield and downfield waters—characterized by ²H-nuclear magnetic resonance (²H-NMR) and proposed that upfield water is a key factor in expressing good blood compatibility. In the present study, further investigations of the role of upfield water and clarification of the spatial water structure were performed using PMEAs with different molecular weights. ²H-NMR analysis revealed that the upfield water content was almost constant, regardless of the molecular weight, whereas the downfield water content increased with an increase in the molecular weight of PMEA. Based on these findings, the role of upfield water is discussed. Homonuclear and heteronuclear Overhauser effect spectroscopies revealed that upfield water existed near the methoxy group of PMEA, within a 0.5 nm range.

聚（2-甲氧基乙基丙烯酸酯）（PMEA）以其良好的血液相容性而闻名，这归功于其独特的中间含水量，如差示扫描量热法所识别的那样。之前，我们报道了PMEA含有两种类型的水-上场水和下场水-通过2h核磁共振（2H-NMR）表征，并提出上场水是表达良好血液相容性的关键因素。在本研究中，我们使用不同分子量的pmea进一步研究了上场水的作用，并澄清了空间水结构。2H-NMR分析表明，无论PMEA的分子量如何，上场含水量几乎不变，而下场含水量随着PMEA分子量的增加而增加。在此基础上，讨论了上油田水的作用。同核和异核Overhauser效应光谱显示，在PMEA的甲氧基附近，在0.5 nm范围内存在上场水。

{"title":"Study on water properties and spatial structure of water in poly(2-methoxy ethylacrylate)s with different molecular weights by nuclear magnetic resonance spectroscopy","authors":"Akira Mochizuki , Yuko Miwa , Konatsu Yoneyama , Chie Yahata , Yoshiki Oda","doi":"10.1080/1023666X.2025.2467164","DOIUrl":"10.1080/1023666X.2025.2467164","url":null,"abstract":"<div><div>Poly(2-methoxyethyl acrylate) (PMEA) is known for its favorable blood compatibility, attributed to its unique intermediate water content, as identified by differential scanning calorimetry. Previously, we reported that PMEA contains two types of water—upfield and downfield waters—characterized by <sup>2</sup>H-nuclear magnetic resonance (<sup>2</sup>H-NMR) and proposed that upfield water is a key factor in expressing good blood compatibility. In the present study, further investigations of the role of upfield water and clarification of the spatial water structure were performed using PMEAs with different molecular weights. <sup>2</sup>H-NMR analysis revealed that the upfield water content was almost constant, regardless of the molecular weight, whereas the downfield water content increased with an increase in the molecular weight of PMEA. Based on these findings, the role of upfield water is discussed. Homonuclear and heteronuclear Overhauser effect spectroscopies revealed that upfield water existed near the methoxy group of PMEA, within a 0.5 nm range.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 4","pages":"Pages 393-407"},"PeriodicalIF":1.7,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the material and mechanical characteristics of 3D printed composites utilizing nSiO2-particulate-reinforced PLA/HDPE filaments with potential applications in the medical field 探索利用nsio2颗粒增强PLA/HDPE长丝的3D打印复合材料的材料和力学特性，在医疗领域具有潜在的应用前景

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-01-09 DOI: 10.1080/1023666X.2024.2444320

Aezhisai Vallavi M. S. , Mugilan. T. , Sridhar. N.

Significant progress in 3D printing technology over recent decades has allowed for the creation of biomedical products with enhanced properties. The incorporation of composite materials in 3D printing offers innovative solutions to a wide range of real-world challenges in medical applications. The present research focuses on the additively manufactured 3D-printed polymer composites developed through the fused deposition modeling technique. Mechanical characteristics such as tensile, compressive, flexural, and Shore D hardness have been investigated in pure PLA/HDPE and with different 1, 2, 3 wt.% of functionalized nSiO₂ reinforced PLA/HDPE. Their results showed that excellent mechanical strength was observed in the 2 wt.% nSiO₂/PLA/HDPE composite as 147.3 MPa tensile strength and 4.05 GPa Young's modulus. Subsequently, the material characteristics of the 2 wt.% nSiO₂-reinforced composite were investigated with various analytical techniques. FESEM micrographs revealed that the developed composites with a rougher surface promoted cell attachment and proliferation and had no delaminated parts in the printed layer. EDAX analysis confirmed the reinforcement material nSiO₂ particles present in the developed composite. The prominent sharp peaks of nSiO₂ incorporated in the 3D-printed composite have an excellent crystallinity nature with 84.3%. The presence of nSiO₂ reinforcement in the composite matrix was confirmed by FTIR and Raman spectroscopy. TGA/DTG results displayed the 7.36% high thermal stability of the nSiO₂-reinforced composite. Thus, the developed composite was found to be a promising material for bone implants in biomedical applications.

近几十年来，3D打印技术的重大进步使得具有增强性能的生物医学产品得以创造。3D打印中复合材料的结合为医疗应用中的各种现实挑战提供了创新的解决方案。目前的研究重点是利用熔融沉积建模技术开发增材制造的3d打印聚合物复合材料。在纯PLA/HDPE和不同的1、2、3重量下，研究了拉伸、压缩、弯曲和邵氏D硬度等机械特性。功能化nSiO2增强PLA/HDPE的百分比。结果表明，该材料具有优异的机械强度。% nSiO2/PLA/HDPE复合材料抗拉强度为147.3 MPa，杨氏模量为4.05 GPa。随后，对2 wt的材料特性进行了分析。采用多种分析技术对nsio2增强复合材料进行了研究。FESEM显微镜显示，表面粗糙的复合材料促进了细胞的附着和增殖，并且在打印层中没有分层部件。EDAX分析证实了复合材料中存在增强材料nSiO2颗粒。3d打印复合材料中加入的nSiO2具有突出的尖峰，结晶度为84.3%。利用红外光谱和拉曼光谱证实了复合材料基体中存在nSiO2增强物。TGA/DTG结果表明，nsio2增强复合材料具有7.36%的高热稳定性。因此，所开发的复合材料是一种很有前途的生物医学骨植入材料。

{"title":"Exploring the material and mechanical characteristics of 3D printed composites utilizing nSiO2-particulate-reinforced PLA/HDPE filaments with potential applications in the medical field","authors":"Aezhisai Vallavi M. S. , Mugilan. T. , Sridhar. N.","doi":"10.1080/1023666X.2024.2444320","DOIUrl":"10.1080/1023666X.2024.2444320","url":null,"abstract":"<div><div>Significant progress in 3D printing technology over recent decades has allowed for the creation of biomedical products with enhanced properties. The incorporation of composite materials in 3D printing offers innovative solutions to a wide range of real-world challenges in medical applications. The present research focuses on the additively manufactured 3D-printed polymer composites developed through the fused deposition modeling technique. Mechanical characteristics such as tensile, compressive, flexural, and Shore D hardness have been investigated in pure PLA/HDPE and with different 1, 2, 3 wt.% of functionalized nSiO<sub>2</sub> reinforced PLA/HDPE. Their results showed that excellent mechanical strength was observed in the 2 wt.% nSiO<sub>2</sub>/PLA/HDPE composite as 147.3 MPa tensile strength and 4.05 GPa Young's modulus. Subsequently, the material characteristics of the 2 wt.% nSiO<sub>2</sub>-reinforced composite were investigated with various analytical techniques. FESEM micrographs revealed that the developed composites with a rougher surface promoted cell attachment and proliferation and had no delaminated parts in the printed layer. EDAX analysis confirmed the reinforcement material nSiO<sub>2</sub> particles present in the developed composite. The prominent sharp peaks of nSiO<sub>2</sub> incorporated in the 3D-printed composite have an excellent crystallinity nature with 84.3%. The presence of nSiO<sub>2</sub> reinforcement in the composite matrix was confirmed by FTIR and Raman spectroscopy. TGA/DTG results displayed the 7.36% high thermal stability of the nSiO<sub>2</sub>-reinforced composite. Thus, the developed composite was found to be a promising material for bone implants in biomedical applications.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 155-176"},"PeriodicalIF":1.7,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication, optical behavior and structural characteristics of the poly (4-chloroaniline)/silver nanoparticles materials for optical devices 光学器件用聚（4-氯苯胺）/纳米银材料的制备、光学性能及结构特性

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-01-06 DOI: 10.1080/1023666X.2024.2447000

B. M. Alotaibi , Hadeel A. Aldossary , A. Atta , E. Abdeltwab , M. M. Abdelhamied

In this study, the flexible composite P(4-CAni)/AgNPs, which consists of poly 4-chloroaniline P(4-CAni) and silver nanoparticles (AgNPs), was successfully prepared using the polymerization preparation method. The results were confirmed by the transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The XRD shows the successful fabrication of the composite and confirms that the pure P(4-CAni) has a typical pattern for the amorphous conducting polymer. The results of the TEM indicated the size of AgNPs in the range from 13 to 28 nm. In addition, the FTIR demonstrates that the AgNPs nanoparticles are uniformly interacted with the P(4-CAni). The wettability and adhesion work of the surface were determined by measuring the contact angle. Moreover, the band tail increased from 1.15 eV for the P(4-CAni) to 1.85 eV, 1.91 eV, and 1.96 eV when P(4-CAni) is mixed with 1.5%, 3%, and 4.5% AgNPs, respectively. Also, adding 1.5%, 3%, and 4.5% AgNPs decreases the band gap energy from 3.48 eV for the P(4-CAni) to 3.12 eV, 3.04 eV, and 2.90 eV, respectively. The interaction between P(4-CAni) and AgNPs enhances the structural properties of the composite, making the P(4-CAni)/AgNPs composite a multifunctional material suitable for various applications. The results demonstrate the fabricated nanocomposite materials exhibiting novel optical properties, which could lead to the use of these composites in optoelectronic devices.

本研究采用聚合法制备了由聚4-氯苯胺P（4-CAni）和纳米银（AgNPs）组成的柔性复合材料P(4-CAni)/AgNPs。通过透射电镜（TEM）、x射线衍射（XRD）和傅里叶变换红外光谱（FTIR）对结果进行了验证。XRD表征了该复合材料的成功制备，并证实了纯P（4-CAni）具有典型的非晶导电聚合物模式。透射电镜结果表明，AgNPs的尺寸在13 ~ 28 nm之间。此外，FTIR表明AgNPs纳米颗粒与P（4-CAni）相互作用均匀。通过测量接触角来测定表面的润湿性和附着力。此外，当P（4-CAni）与1.5%、3%和4.5% AgNPs混合时，带尾分别从P（4-CAni）的1.15 eV增加到1.85 eV、1.91 eV和1.96 eV。此外，添加1.5%、3%和4.5%的AgNPs将带隙能量从P（4-CAni）的3.48 eV分别降低到3.12 eV、3.04 eV和2.90 eV。P（4-CAni）与AgNPs之间的相互作用增强了复合材料的结构性能，使P(4-CAni)/AgNPs复合材料成为一种适用于各种应用的多功能材料。结果表明，制备的纳米复合材料具有新颖的光学特性，这可能导致这些复合材料在光电器件中的应用。

{"title":"Fabrication, optical behavior and structural characteristics of the poly (4-chloroaniline)/silver nanoparticles materials for optical devices","authors":"B. M. Alotaibi , Hadeel A. Aldossary , A. Atta , E. Abdeltwab , M. M. Abdelhamied","doi":"10.1080/1023666X.2024.2447000","DOIUrl":"10.1080/1023666X.2024.2447000","url":null,"abstract":"<div><div>In this study, the flexible composite P(4-CAni)/AgNPs, which consists of poly 4-chloroaniline P(4-CAni) and silver nanoparticles (AgNPs), was successfully prepared using the polymerization preparation method. The results were confirmed by the transmission electron microscope (TEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). The XRD shows the successful fabrication of the composite and confirms that the pure P(4-CAni) has a typical pattern for the amorphous conducting polymer. The results of the TEM indicated the size of AgNPs in the range from 13 to 28 nm. In addition, the FTIR demonstrates that the AgNPs nanoparticles are uniformly interacted with the P(4-CAni). The wettability and adhesion work of the surface were determined by measuring the contact angle. Moreover, the band tail increased from 1.15 eV for the P(4-CAni) to 1.85 eV, 1.91 eV, and 1.96 eV when P(4-CAni) is mixed with 1.5%, 3%, and 4.5% AgNPs, respectively. Also, adding 1.5%, 3%, and 4.5% AgNPs decreases the band gap energy from 3.48 eV for the P(4-CAni) to 3.12 eV, 3.04 eV, and 2.90 eV, respectively. The interaction between P(4-CAni) and AgNPs enhances the structural properties of the composite, making the P(4-CAni)/AgNPs composite a multifunctional material suitable for various applications. The results demonstrate the fabricated nanocomposite materials exhibiting novel optical properties, which could lead to the use of these composites in optoelectronic devices.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 177-189"},"PeriodicalIF":1.7,"publicationDate":"2025-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical and biological characteristics of electrospun poly (vinyl alcohol) and reduced graphene oxide nanofibrous structure 静电纺聚乙烯醇和还原氧化石墨烯纳米纤维结构的物理和生物学特性

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2424264

Hilal Turkoglu Sasmazel , Marwa Alazzawi , Melike Gozutok , Veera Sadhu

The fabrication of graphene-based nanocomposites has been a topic of increasing interest due to graphene’s exceptional physical properties and the ability to enhance the properties of various polymeric materials. Evaluating the biocompatibility of these nanocomposites is crucial to ensure their safe and effective use in biomedical applications. This study characterized and assessed the biocompatibility of previously fabricated electrospun polyvinyl alcohol (PVA)/reduced graphene oxide rGO fibrous structures by conducting a comprehensive assessment of their physical and biological characteristics. Contact angle measurements revealed that adding rGO to electrospun PVA fibers enhanced the surface wettability, improving the fibrous structure’s PBS absorption capacity and degradation behavior. Including the rGO content resulted in a higher water vapor transmission rate, reaching ∼48 g/m²·day for PVA + 0.5 wt.% rGO and ∼45 g/m²·day for PVA + 1.0 wt.% rGO, compared to ∼40 g/m²·day for electrospun PVA fibers. Cell culture studies, including MTT assay, alkaline phosphatase (ALP) activity analysis, alizarin red staining, fluorescence microscopy, and SEM analyses, demonstrated that electrospun PVA + 1.0 wt.% rGO nanocomposites exhibited superior cell viability, proliferation, and growth compared to other samples, due to the improved physical properties of the PVA + 1.0 wt.% rGO fibrous structure.

由于石墨烯具有优异的物理性能和增强各种聚合物材料性能的能力，石墨烯基纳米复合材料的制造一直是人们越来越感兴趣的话题。评估这些纳米复合材料的生物相容性对于确保其在生物医学应用中的安全有效使用至关重要。本研究通过对电纺丝聚乙烯醇(PVA)/还原氧化石墨烯rGO纤维结构的物理和生物特性进行全面评估，表征并评估了其生物相容性。接触角测量结果表明，在静电纺PVA纤维中加入还原氧化石墨烯增强了纤维的表面润湿性，改善了纤维结构对PBS的吸收能力和降解性能。加入还原氧化石墨烯含量导致更高的水蒸气透过率，PVA + 0.5 wt达到~ 48 g/m2·天。% rGO和~ 45 g/m2·天的PVA + 1.0 wt。% rGO，而静电纺PVA纤维为~ 40 g/m2·天。细胞培养研究，包括MTT试验、碱性磷酸酶（ALP）活性分析、茜素红染色、荧光显微镜和扫描电镜分析，表明静电纺PVA + 1.0 wt。与其他样品相比，由于PVA + 1.0 wt的物理性能得到改善，rGO纳米复合材料表现出更好的细胞活力、增殖和生长。纤维结构。

{"title":"Physical and biological characteristics of electrospun poly (vinyl alcohol) and reduced graphene oxide nanofibrous structure","authors":"Hilal Turkoglu Sasmazel , Marwa Alazzawi , Melike Gozutok , Veera Sadhu","doi":"10.1080/1023666X.2024.2424264","DOIUrl":"10.1080/1023666X.2024.2424264","url":null,"abstract":"<div><div>The fabrication of graphene-based nanocomposites has been a topic of increasing interest due to graphene’s exceptional physical properties and the ability to enhance the properties of various polymeric materials. Evaluating the biocompatibility of these nanocomposites is crucial to ensure their safe and effective use in biomedical applications. This study characterized and assessed the biocompatibility of previously fabricated electrospun polyvinyl alcohol (PVA)/reduced graphene oxide rGO fibrous structures by conducting a comprehensive assessment of their physical and biological characteristics. Contact angle measurements revealed that adding rGO to electrospun PVA fibers enhanced the surface wettability, improving the fibrous structure’s PBS absorption capacity and degradation behavior. Including the rGO content resulted in a higher water vapor transmission rate, reaching ∼48 g/m<sup>2</sup>·day for PVA + 0.5 wt.% rGO and ∼45 g/m<sup>2</sup>·day for PVA + 1.0 wt.% rGO, compared to ∼40 g/m<sup>2</sup>·day for electrospun PVA fibers. Cell culture studies, including MTT assay, alkaline phosphatase (ALP) activity analysis, alizarin red staining, fluorescence microscopy, and SEM analyses, demonstrated that electrospun PVA + 1.0 wt.% rGO nanocomposites exhibited superior cell viability, proliferation, and growth compared to other samples, due to the improved physical properties of the PVA + 1.0 wt.% rGO fibrous structure.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 83-97"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal stability and combustion properties of polyurethane foam modified with manganese phytate and expandable graphite 植酸锰和可膨胀石墨改性聚氨酯泡沫的热稳定性和燃烧性能

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2421816

Xu Zhang , Meng Zhang , Handong Li , Zhi Wang , Hua Xie

Manganese phytate (MnPa) was prepared and synergistically combined with expandable graphite (EG) flame retardant modified polyurethane foam (PUF). Utilizing thermogravimetric (TG), pyrolysis kinetic analysis, CONE analysis, smoke toxicity analysis, limiting oxygen index (LOI), and UL-94 horizontal combustion test procedures, the thermal stability and combustion parameters of the modified PUFs were examined. The flame retardancy and smoke suppression of the modified PUFs were analyzed based on the heat release rate (HRR), total heat release (THR), smoke production rate (SPR), and total smoke release (TSR). The results showed that MEPUF3 had the highest thermal decomposition rate temperature, initial thermogravimetric temperature, and activation energy (E). It was shown that MEPUF3 had the lowest HRR of 17.68 kW/m², the lowest THR of 1.15 MJ/m², the lowest SPR of 0.0046 m²/s, the lowest TSR of 19.58 m²/m², the lowest Ds of 32.1, the highest transmittance of 57.7%, and the highest LOI of 23.0%. The present study showed that MEPUF3 possessed good thermal stability and flame retardant properties, which provided useful references for subsequent phytate and EG-modified PUFs.

制备了植酸锰（MnPa），并与可膨胀石墨（EG）阻燃改性聚氨酯泡沫（PUF）协同复合。采用热重分析（TG）、热解动力学分析、CONE分析、烟毒性分析、极限氧指数（LOI）和UL-94水平燃烧试验等方法，对改性PUFs的热稳定性和燃烧参数进行了研究。从放热率（HRR）、总放热率（THR）、产烟率（SPR）和总放烟率（TSR）等方面分析了改性puf的阻燃性和抑烟性。结果表明，MEPUF3具有最高的热分解速率温度、初始热重温度和活化能(E)， HRR最低为17.68 kW/m2， THR最低为1.15 MJ/m2， SPR最低为0.0046 m2/s， TSR最低为19.58 m2/m2， Ds最低为32.1，透过率最高为57.7%，LOI最高为23.0%。研究结果表明，MEPUF3具有良好的热稳定性和阻燃性能，为后续的植酸盐和eg改性puf提供了有益的参考。

{"title":"Thermal stability and combustion properties of polyurethane foam modified with manganese phytate and expandable graphite","authors":"Xu Zhang , Meng Zhang , Handong Li , Zhi Wang , Hua Xie","doi":"10.1080/1023666X.2024.2421816","DOIUrl":"10.1080/1023666X.2024.2421816","url":null,"abstract":"<div><div>Manganese phytate (MnPa) was prepared and synergistically combined with expandable graphite (EG) flame retardant modified polyurethane foam (PUF). Utilizing thermogravimetric (TG), pyrolysis kinetic analysis, CONE analysis, smoke toxicity analysis, limiting oxygen index (LOI), and UL-94 horizontal combustion test procedures, the thermal stability and combustion parameters of the modified PUFs were examined. The flame retardancy and smoke suppression of the modified PUFs were analyzed based on the heat release rate (HRR), total heat release (THR), smoke production rate (SPR), and total smoke release (TSR). The results showed that MEPUF3 had the highest thermal decomposition rate temperature, initial thermogravimetric temperature, and activation energy (E). It was shown that MEPUF3 had the lowest HRR of 17.68 kW/m<sup>2</sup>, the lowest THR of 1.15 MJ/m<sup>2</sup>, the lowest SPR of 0.0046 m<sup>2</sup>/s, the lowest TSR of 19.58 m<sup>2</sup>/m<sup>2</sup>, the lowest Ds of 32.1, the highest transmittance of 57.7%, and the highest LOI of 23.0%. The present study showed that MEPUF3 possessed good thermal stability and flame retardant properties, which provided useful references for subsequent phytate and EG-modified PUFs.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 47-67"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graft copolymerization of carboxymethylcellulose with solketal acrylate 羧甲基纤维素与丙烯酸酯溶胶的接枝共聚

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2445671

Khaled Beyaz , Emeline Vedrenne , Carlos Vaca-Garcia , Sophie Thiebaud-Roux , Ahmed Benaboura , Nabila Haddadine

The objective of this work is to synthesize new materials based on cellulose fiber. In this study, we presented the synthesis of a new biomaterial by conducting graft polymerization of 2,2-dimethyl-1,3-dioxolan-4-yl methyl acrylate (DMDMA solketal acrylate) onto carboxymethylcellulose (CMC), using KPS as an initiator. We conducted several experiments to determine the optimal conditions for preparing this biopolymer, varying the reaction time and the ratio between the initiator and the monomer. The results revealed that the highest grafting yield, 52%, was obtained after 72 min at 65 °C, with 6.26 mmol of KPS/eq OH and 4.43 moles of DMDMA/eq OH, using THF as a solvent. FTIR spectroscopy confirmed the grafting of monomers onto the CMC. Thermogravimetry showed that the degradation of the grafted CMC occurs in two stages, unlike the degradation of the CMC, which occurs in a single stage, confirming the modification of the starting product. SEM images clearly show the morphological difference between the CMC and the grafted CMC. The BET analysis reveals moderate adsorption at low pressure, followed by a marked increase at high pressure, indicating the presence of mesopores. The hysteresis between adsorption and desorption also suggests closed pore structures. The pore size distribution shows a predominance of pores between 30 and 100 Å, providing an optimal specific surface area for small molecule adsorption and catalytic reactions. This mesoporous profile is suitable for adsorption and catalysis applications. To our knowledge, our study represents the first use of the synthesized monomer, DMDMA solketal acrylate, for grafting onto the structure of CMC, highlighting the originality of our research.

本工作的目的是合成基于纤维素纤维的新材料。在本研究中，我们以KPS为引发剂，在羧甲基纤维素（CMC）上接枝聚合2,2-二甲基-1,3-二氧唑兰-4-酰基丙烯酸甲酯（DMDMA - solketal acrylate），合成了一种新的生物材料。我们进行了几个实验来确定制备这种生物聚合物的最佳条件，改变了反应时间和引发剂和单体之间的比例。结果表明，以THF为溶剂，在65℃条件下，以6.26 mmol KPS/eq OH和4.43 mol DMDMA/eq OH为溶剂，反应72 min，接枝率最高，为52%。FTIR光谱证实了单体接枝到CMC上。热重测定结果表明，接枝CMC的降解分两个阶段进行，而CMC的降解只发生一个阶段，证实了起始产物的改性。SEM图像清晰地显示了CMC与接枝CMC的形态差异。BET分析显示，在低压下，吸附量适中，在高压下，吸附量明显增加，表明介孔的存在。吸附和解吸之间的滞后也表明孔隙结构是封闭的。孔径分布在30 ~ 100 Å之间，为小分子吸附和催化反应提供了最佳的比表面积。这种介孔结构适合于吸附和催化应用。据我们所知，我们的研究是第一次将合成的单体DMDMA溶胶丙烯酸酯接枝到CMC的结构上，突出了我们研究的独创性。

{"title":"Graft copolymerization of carboxymethylcellulose with solketal acrylate","authors":"Khaled Beyaz , Emeline Vedrenne , Carlos Vaca-Garcia , Sophie Thiebaud-Roux , Ahmed Benaboura , Nabila Haddadine","doi":"10.1080/1023666X.2024.2445671","DOIUrl":"10.1080/1023666X.2024.2445671","url":null,"abstract":"<div><div>The objective of this work is to synthesize new materials based on cellulose fiber. In this study, we presented the synthesis of a new biomaterial by conducting graft polymerization of 2,2-dimethyl-1,3-dioxolan-4-yl methyl acrylate (DMDMA solketal acrylate) onto carboxymethylcellulose (CMC), using KPS as an initiator. We conducted several experiments to determine the optimal conditions for preparing this biopolymer, varying the reaction time and the ratio between the initiator and the monomer. The results revealed that the highest grafting yield, 52%, was obtained after 72 min at 65 °C, with 6.26 mmol of KPS/eq OH and 4.43 moles of DMDMA/eq OH, using THF as a solvent. FTIR spectroscopy confirmed the grafting of monomers onto the CMC. Thermogravimetry showed that the degradation of the grafted CMC occurs in two stages, unlike the degradation of the CMC, which occurs in a single stage, confirming the modification of the starting product. SEM images clearly show the morphological difference between the CMC and the grafted CMC. The BET analysis reveals moderate adsorption at low pressure, followed by a marked increase at high pressure, indicating the presence of mesopores. The hysteresis between adsorption and desorption also suggests closed pore structures. The pore size distribution shows a predominance of pores between 30 and 100 Å, providing an optimal specific surface area for small molecule adsorption and catalytic reactions. This mesoporous profile is suitable for adsorption and catalysis applications. To our knowledge, our study represents the first use of the synthesized monomer, DMDMA solketal acrylate, for grafting onto the structure of CMC, highlighting the originality of our research.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 2","pages":"Pages 190-201"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143176512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of decorated polyborosiloxane for enhancing the flame retardancy and mechanical property of epoxy resin 用于增强环氧树脂阻燃性和力学性能的装饰型聚硼硅氧烷的合成

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization

Pub Date : 2025-01-02 DOI: 10.1080/1023666X.2024.2425720

Xiaoliang Zeng , Hua Mao , Qijun Liu , Fuxiang Li , Xinsheng Lan , Fangqiang Wang , Yu Song , Mingwei Li , Tianhao Zhang

In this work, the decorated polyborosiloxane (MAPBS) with phosphorus-nitrogen components was first synthesized via a hydrolysis-condensation reaction and thus incorporated the MAPBS filler into epoxy resin (EP) to fabricate composites by a simple blending method. It could be found that the MAPBS with epoxy groups showed a good dispersion level in the EP matrix, endowing EP composites with superior flame retardancy and mechanical properties. Thanks to the combination of phosphorus-, nitrogen-, boron-, and silica-containing units in MAPBS filler, the addition of 6 wt% MAPBS made EP achieve significantly improved limiting oxygen index (25.2 ± 0.5%) and UL-94 rating (V1). Meanwhile, cone calorimeter test results revealed that the peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) of the EP-MAPBS6 composite were reduced by 31%, 62%, and 67%, respectively, as compared to the pure EP. In addition, the MAPBS6 composite exhibited balanced tensile strength (105.1 MPa) and elongation at break (87.6%) among the prepared samples. The present work provides an effective strategy to fabricate EP composites with improved comprehensive performances.

本文首先通过水解缩合反应合成了含磷氮组分的修饰型聚硼硅氧烷（MAPBS），并将MAPBS填料加入环氧树脂（EP）中，通过简单的共混法制备了复合材料。结果表明，环氧基MAPBS在EP基体中表现出良好的分散水平，使EP复合材料具有优异的阻燃性能和力学性能。由于MAPBS填料中含磷、含氮、含硼和含硅单元的组合，添加6 wt%的MAPBS可以显著提高EP的极限氧指数（25.2±0.5%）和UL-94等级（V1）。与此同时，锥量热计测试结果显示，EP- mapbs6复合材料的峰值放热率（PHRR）、总放热率（THR）和总产烟率（TSP）分别比纯EP降低了31%、62%和67%。此外，MAPBS6复合材料的抗拉强度为105.1 MPa，断裂伸长率为87.6%。本工作为制备综合性能更高的EP复合材料提供了一条有效的途径。

{"title":"Synthesis of decorated polyborosiloxane for enhancing the flame retardancy and mechanical property of epoxy resin","authors":"Xiaoliang Zeng , Hua Mao , Qijun Liu , Fuxiang Li , Xinsheng Lan , Fangqiang Wang , Yu Song , Mingwei Li , Tianhao Zhang","doi":"10.1080/1023666X.2024.2425720","DOIUrl":"10.1080/1023666X.2024.2425720","url":null,"abstract":"<div><div>In this work, the decorated polyborosiloxane (MAPBS) with phosphorus-nitrogen components was first synthesized via a hydrolysis-condensation reaction and thus incorporated the MAPBS filler into epoxy resin (EP) to fabricate composites by a simple blending method. It could be found that the MAPBS with epoxy groups showed a good dispersion level in the EP matrix, endowing EP composites with superior flame retardancy and mechanical properties. Thanks to the combination of phosphorus-, nitrogen-, boron-, and silica-containing units in MAPBS filler, the addition of 6 wt% MAPBS made EP achieve significantly improved limiting oxygen index (25.2 ± 0.5%) and UL-94 rating (V1). Meanwhile, cone calorimeter test results revealed that the peak heat release rate (PHRR), total heat release (THR), and total smoke production (TSP) of the EP-MAPBS6 composite were reduced by 31%, 62%, and 67%, respectively, as compared to the pure EP. In addition, the MAPBS6 composite exhibited balanced tensile strength (105.1 MPa) and elongation at break (87.6%) among the prepared samples. The present work provides an effective strategy to fabricate EP composites with improved comprehensive performances.</div></div>","PeriodicalId":14236,"journal":{"name":"International Journal of Polymer Analysis and Characterization","volume":"30 1","pages":"Pages 98-108"},"PeriodicalIF":1.7,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143165148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0