Pub Date : 2024-08-15DOI: 10.1515/polyeng-2024-0076
Chengcheng Liu, Shibin Wang, Fei Jia, Bo Zheng, Shuaishuai Li, Yuheng Yang, Yang Gao, Jinzhou Zhao
A novel hydrophobic association copolymer (PAMA) was synthesized by incorporating acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), cationic monomer (MEDDA), and methyl methacrylate (MMA). The properties of MMA copolymers with varying contents were analyzed using infrared spectroscopy, nuclear magnetic resonance spectroscopy, and scanning electron microscopy. Optimal overall performance of the solution was achieved when the MMA content reached 1.4 % w/w. Compared to pure PAAM (without MMA), the PAMA-1.4 % polymer exhibited superior viscoelasticity, temperature resistance, and shear resistance. This enhancement in PAMA performance can be attributed to the significant inhibition of intermolecular water film formation within the polymer matrix by MMA, effectively improving and regulating solution solubility while strengthening molecular chain interactions and enhancing the structural network strength of PAMA polymers. Additionally, the inclusion of MMA transformed rock surfaces from non-wetting to wetting conditions, thereby greatly improving oil displacement efficiency. In displacement experiments, PAMA-1.4 % performed better in terms of enhanced oil recovery, the recovery rate of 0.1 % w/w PAMA-2.4 % solution is only 7.78 %, while the recovery rate of 0.1 % w/w PAMA-1.4 % solution is 13.06 %.
{"title":"Synthesis and properties of AM/AMPS/MMA and cationic monomer copolymer flooding agent","authors":"Chengcheng Liu, Shibin Wang, Fei Jia, Bo Zheng, Shuaishuai Li, Yuheng Yang, Yang Gao, Jinzhou Zhao","doi":"10.1515/polyeng-2024-0076","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0076","url":null,"abstract":"A novel hydrophobic association copolymer (PAMA) was synthesized by incorporating acrylamide (AM), 2-acrylamide-2-methylpropanesulfonic acid (AMPS), cationic monomer (MEDDA), and methyl methacrylate (MMA). The properties of MMA copolymers with varying contents were analyzed using infrared spectroscopy, nuclear magnetic resonance spectroscopy, and scanning electron microscopy. Optimal overall performance of the solution was achieved when the MMA content reached 1.4 % w/w. Compared to pure PAAM (without MMA), the PAMA-1.4 % polymer exhibited superior viscoelasticity, temperature resistance, and shear resistance. This enhancement in PAMA performance can be attributed to the significant inhibition of intermolecular water film formation within the polymer matrix by MMA, effectively improving and regulating solution solubility while strengthening molecular chain interactions and enhancing the structural network strength of PAMA polymers. Additionally, the inclusion of MMA transformed rock surfaces from non-wetting to wetting conditions, thereby greatly improving oil displacement efficiency. In displacement experiments, PAMA-1.4 % performed better in terms of enhanced oil recovery, the recovery rate of 0.1 % w/w PAMA-2.4 % solution is only 7.78 %, while the recovery rate of 0.1 % w/w PAMA-1.4 % solution is 13.06 %.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"21 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142184599","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}
Pub Date : 2024-08-04DOI: 10.1515/polyeng-2023-0294
Ying Wang, Jifa Liu, Chunyu Zhang, Yutong Wang, Tiantang Fan
Osteomyelitis is a complex infectious disease caused by bacterial infection, which has always been a difficult problem for clinical orthopedic surgeons. Although the traditional methods are effective in treating osteomyelitis, the heavy use of antibiotics and surgical treatment cause serious side effects and lead to bone loss and healing difficulties after surgery. Chitosan (CS), a natural polymer material, is a deacetylated derivative of chitin, which has good biodegradability, antibacterial, and osteogenic properties, and has been widely used in the treatment of osteomyelitis. In this review, the recent research progress in the application of CS based composites such as micro-nano drug delivery carriers, hydrogels, coating materials, and bone tissue engineering scaffolds for the treatment of osteomyelitis is summarized, in order to provide certain experimental and theoretical support for the development of CS based composites.
{"title":"Recent development of chitosan-based biomaterials for treatment of osteomyelitis","authors":"Ying Wang, Jifa Liu, Chunyu Zhang, Yutong Wang, Tiantang Fan","doi":"10.1515/polyeng-2023-0294","DOIUrl":"https://doi.org/10.1515/polyeng-2023-0294","url":null,"abstract":"Osteomyelitis is a complex infectious disease caused by bacterial infection, which has always been a difficult problem for clinical orthopedic surgeons. Although the traditional methods are effective in treating osteomyelitis, the heavy use of antibiotics and surgical treatment cause serious side effects and lead to bone loss and healing difficulties after surgery. Chitosan (CS), a natural polymer material, is a deacetylated derivative of chitin, which has good biodegradability, antibacterial, and osteogenic properties, and has been widely used in the treatment of osteomyelitis. In this review, the recent research progress in the application of CS based composites such as micro-nano drug delivery carriers, hydrogels, coating materials, and bone tissue engineering scaffolds for the treatment of osteomyelitis is summarized, in order to provide certain experimental and theoretical support for the development of CS based composites.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141944539","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}
Pub Date : 2024-08-03DOI: 10.1515/polyeng-2024-0090
Matija Hriberšek, Simon Kulovec
Engineering plastics are increasingly used for gearing systems, such as in the automotive sector, e-mobility sector, and household appliances. The basic task of the gearing system is to efficiently transfer power from the source to the application user. The use of engineering plastics for gearing applications is conditioned by the lack of tribological characteristics of material pairs which influence on fatigue and wear behaviour of the whole gearing system. The paper presents testing of the steel/Polyamide 66-gear by determining fatigue life in an infinite area, considering high precision optical measurements in the range of micro-meter accuracy of abrasion flank wear together with surface temperature in contact, providing an important database for engineers about material suitability for appropriate mechanical systems. Observing the results, gear flank wear of PA66 HT is directly proportional to the meshing temperature and torque. Thermal melting is a characteristic failure mode of the polymer gears which are exposed to higher load levels. In the middle torques, the dominant failure mode is flank fracture known as pitch point fracture. The greater impact of the gear wear mechanism occurs at lower torques where initial crack propagation starts at the pitch point and ends in the tooth root area.
{"title":"Experimental analysis of failure modes depending on different loading conditions applied on cylindrical polyamide 66 gears","authors":"Matija Hriberšek, Simon Kulovec","doi":"10.1515/polyeng-2024-0090","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0090","url":null,"abstract":"Engineering plastics are increasingly used for gearing systems, such as in the automotive sector, e-mobility sector, and household appliances. The basic task of the gearing system is to efficiently transfer power from the source to the application user. The use of engineering plastics for gearing applications is conditioned by the lack of tribological characteristics of material pairs which influence on fatigue and wear behaviour of the whole gearing system. The paper presents testing of the steel/Polyamide 66-gear by determining fatigue life in an infinite area, considering high precision optical measurements in the range of micro-meter accuracy of abrasion flank wear together with surface temperature in contact, providing an important database for engineers about material suitability for appropriate mechanical systems. Observing the results, gear flank wear of PA66 HT is directly proportional to the meshing temperature and torque. Thermal melting is a characteristic failure mode of the polymer gears which are exposed to higher load levels. In the middle torques, the dominant failure mode is flank fracture known as pitch point fracture. The greater impact of the gear wear mechanism occurs at lower torques where initial crack propagation starts at the pitch point and ends in the tooth root area.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"373 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141944540","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}
Excellent oxygen barrier films were prepared by blending very small loadings (<1 wt%) of dihydroxyacetone (DHA), erythritol (ET) or xylitol (XT) in thermoplastic starch (TPS), and/or processing with supercritical carbon dioxide (scCO2) assistance. The minimum oxygen transmission rates (OTR) and all free-volume-hole characteristic (FVH) values of each scCO2-processed TPS/sugar alcohol film series are somewhat smaller than those of corresponding TPS/sugar alcohol film series without scCO2-assistance, and decrease with the decrease in sugar alcohol’s molecular weight. The minimum OTR values acquired for scCO2-processed TPS/DHA and TPS/ET blown films are only 3.6 and 4.3 cm3/m2·day·atm, respectively, which meet the demand of high oxygen barrier films having OTR ≦5 cm3/m2·day·atm. The longitudinal or transversal tensile strengths acquired for each scCO2-processed TPS/sugar alcohol series films are ∼30 % to ∼40 % higher than those of the TPS blown films. Dynamic mechanical relaxations of each TPS/sugar alcohol or scCO2-processed TPS/sugar alcohol film series reveal that the sugar alcohols are compatible with TPS, as their sugar alcohol contents are ≤ the corresponding compatibility values. The decreased OTR and FVH values acquired for TPS/sugar alcohol or scCO2-processed TPS/sugar alcohol films are most likely due to them being scCO2-processed or incorporated with smaller molecular weight of sugar alcohols.
{"title":"Fully renewable oxygen barrier films of scCO2-processed thermoplastic starch/sugar alcohol blends","authors":"Qian-li Luo, Zi-yu Wang, Ning Ma, Hong-juan Xu, Ya-qiong Huang, Jen-taut Yeh","doi":"10.1515/polyeng-2024-0080","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0080","url":null,"abstract":"Excellent oxygen barrier films were prepared by blending very small loadings (<1 wt%) of dihydroxyacetone (DHA), erythritol (ET) or xylitol (XT) in thermoplastic starch (TPS), and/or processing with supercritical carbon dioxide (scCO<jats:sub>2</jats:sub>) assistance. The minimum oxygen transmission rates (OTR) and all free-volume-hole characteristic (FVH) values of each scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol film series are somewhat smaller than those of corresponding TPS/sugar alcohol film series without scCO<jats:sub>2</jats:sub>-assistance, and decrease with the decrease in sugar alcohol’s molecular weight. The minimum OTR values acquired for scCO<jats:sub>2</jats:sub>-processed TPS/DHA and TPS/ET blown films are only 3.6 and 4.3 cm<jats:sup>3</jats:sup>/m<jats:sup>2</jats:sup>·day·atm, respectively, which meet the demand of high oxygen barrier films having OTR ≦5 cm<jats:sup>3</jats:sup>/m<jats:sup>2</jats:sup>·day·atm. The longitudinal or transversal tensile strengths acquired for each scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol series films are ∼30 % to ∼40 % higher than those of the TPS blown films. Dynamic mechanical relaxations of each TPS/sugar alcohol or scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol film series reveal that the sugar alcohols are compatible with TPS, as their sugar alcohol contents are ≤ the corresponding compatibility values. The decreased OTR and FVH values acquired for TPS/sugar alcohol or scCO<jats:sub>2</jats:sub>-processed TPS/sugar alcohol films are most likely due to them being scCO<jats:sub>2</jats:sub>-processed or incorporated with smaller molecular weight of sugar alcohols.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"24 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141886050","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}
Pub Date : 2024-07-22DOI: 10.1515/polyeng-2024-0053
Zaheer Abbas, Sibgha Iqbal, Sabeeh Khaliq, Muhammad Y. Rafiq
Roll coating plays a significant role in various coating industries such as magnetic records, wallpapers, wrapping, adhesive tapes, books and magazines, photographic and plastic films. The thin layer coating of a magnetohydrodynamic (MHD) viscous hybrid nanofluid by passing through the space between two co-rotating rolls has been studied in an isothermal and incompressible analysis. The governing equation of mass and momentum are obtained then dimensionless using lubrication approximation theory (LAT). The velocity, pressure gradient, and pressure distribution are determined by the exact solution. Using Simpson’s (3/8) rule for numerical integration, the complex integral is examined. Important engineering parameters including power and roll separating force delivered by the rolls to the fluid are also estimated numerically. Raising the volume fraction of nanoparticles raises the pressure distribution and pressure gradient while having little effect on the velocity profile. It seems that the magnetic field and hybrid nanofluid, both seem very advantageous for the efficient roll coating process, controlling the separation force, power input, and distance between the attachment and separation point.
{"title":"Impacts of operating variables in forward roll coating process of viscous hybrid nanofluid","authors":"Zaheer Abbas, Sibgha Iqbal, Sabeeh Khaliq, Muhammad Y. Rafiq","doi":"10.1515/polyeng-2024-0053","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0053","url":null,"abstract":"Roll coating plays a significant role in various coating industries such as magnetic records, wallpapers, wrapping, adhesive tapes, books and magazines, photographic and plastic films. The thin layer coating of a magnetohydrodynamic (MHD) viscous hybrid nanofluid by passing through the space between two co-rotating rolls has been studied in an isothermal and incompressible analysis. The governing equation of mass and momentum are obtained then dimensionless using lubrication approximation theory (LAT). The velocity, pressure gradient, and pressure distribution are determined by the exact solution. Using Simpson’s (3/8) rule for numerical integration, the complex integral is examined. Important engineering parameters including power and roll separating force delivered by the rolls to the fluid are also estimated numerically. Raising the volume fraction of nanoparticles raises the pressure distribution and pressure gradient while having little effect on the velocity profile. It seems that the magnetic field and hybrid nanofluid, both seem very advantageous for the efficient roll coating process, controlling the separation force, power input, and distance between the attachment and separation point.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"66 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141776850","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}
Pub Date : 2024-07-01DOI: 10.1515/polyeng-2024-0035
Jianxiang Chen, Liqiang Deng, Shentao Gong, Runmiao Yang
In this work, poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was modified by cellulose derivatives, and the effects of different kinds of cellulose derivatives on the crystallization and mechanical properties of PHBV were investigated. The crystallization and mechanical properties of PHBV/cellulose derivatives composites were measured by means of differential scanning calorimeter, polarizing microscope, and mechanical properties testing instruments. Studies show that cellulose acetate (CA) can promote the crystallization of PHBV, a small amount of CA can significantly increase the crystallization temperature of PHBV. The crystallization rate of PHBV was also accelerated by CA. However, the addition of cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB) decreased the crystallization temperature of PHBV and inhibited the nucleation of PHBV. And the degree of inhibition increased with the increase of CAB and CAP content. CAB and CAP have good compatibility with PHBV, CAB, and CAP can be uniformly dispersed in PHBV. Cellulose derivatives with specific component content can enhance the tensile properties of PHBV without losing the impact strength.
本研究用纤维素衍生物对聚（3-羟基丁酸-3-羟基戊酸）（PHBV）进行改性，并研究了不同种类的纤维素衍生物对 PHBV 结晶和力学性能的影响。通过差示扫描量热仪、偏光显微镜和力学性能测试仪器测量了 PHBV/纤维素衍生物复合材料的结晶和力学性能。研究表明，醋酸纤维素（CA）能促进 PHBV 的结晶，少量的 CA 就能显著提高 PHBV 的结晶温度。CA 还能加快 PHBV 的结晶速度。然而，醋酸纤维素丙酸酯（CAP）和醋酸纤维素丁酸酯（CAB）的加入降低了 PHBV 的结晶温度，抑制了 PHBV 的成核。抑制程度随 CAB 和 CAP 含量的增加而增加。CAB 和 CAP 与 PHBV 具有良好的相容性，CAB 和 CAP 可以均匀地分散在 PHBV 中。特定组分含量的纤维素衍生物可增强 PHBV 的拉伸性能而不损失冲击强度。
{"title":"Effect of cellulose derivatives on crystallization and mechanical properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)","authors":"Jianxiang Chen, Liqiang Deng, Shentao Gong, Runmiao Yang","doi":"10.1515/polyeng-2024-0035","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0035","url":null,"abstract":"In this work, poly(3-hydroxybutyrate-<jats:italic>co</jats:italic>-3-hydroxyvalerate) (PHBV) was modified by cellulose derivatives, and the effects of different kinds of cellulose derivatives on the crystallization and mechanical properties of PHBV were investigated. The crystallization and mechanical properties of PHBV/cellulose derivatives composites were measured by means of differential scanning calorimeter, polarizing microscope, and mechanical properties testing instruments. Studies show that cellulose acetate (CA) can promote the crystallization of PHBV, a small amount of CA can significantly increase the crystallization temperature of PHBV. The crystallization rate of PHBV was also accelerated by CA. However, the addition of cellulose acetate propionate (CAP) and cellulose acetate butyrate (CAB) decreased the crystallization temperature of PHBV and inhibited the nucleation of PHBV. And the degree of inhibition increased with the increase of CAB and CAP content. CAB and CAP have good compatibility with PHBV, CAB, and CAP can be uniformly dispersed in PHBV. Cellulose derivatives with specific component content can enhance the tensile properties of PHBV without losing the impact strength.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"80 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502575","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}
Pub Date : 2024-06-28DOI: 10.1515/polyeng-2024-0048
Kaiwen Zheng, Jiaoxue Shi, Shichang Chen
To promote theoretical understanding for optimizing the entire process parameters (temperature, pressure, flow rate, etc.) and quality indicators (molar fraction, end-group concentration, and number-average molecular weight) in the industrial production of polyethylene terephthalate (PET), a dataset construction for production parameters and product quality indicators was accomplished in conjunction with industrial process simulation software. A complete deep learning workflow including data collection, dataset construction, model training, and evaluation was established. A prediction method for process-product quality of PET production based on the residual neural network (ResNet) network was proposed to reduce the complexity of quality control in polyester production. The results show that compared to traditional convolutional neural network (CNN), ResNet has higher accuracy (R2 ≥ 0.9998) in predicting the PET production process and product quality. It can accurately establish the mapping relationship between production parameters and product quality indicators, providing theoretical guidance for intelligent production.
为了促进对聚对苯二甲酸乙二酯（PET）工业生产中整个工艺参数（温度、压力、流速等）和质量指标（摩尔分数、端基浓度和数均分子量）优化的理论理解，我们结合工业过程仿真软件完成了生产参数和产品质量指标的数据集构建。建立了一套完整的深度学习工作流程，包括数据收集、数据集构建、模型训练和评估。提出了一种基于残差神经网络（ResNet）的 PET 生产过程-产品质量预测方法，以降低聚酯生产质量控制的复杂性。结果表明，与传统的卷积神经网络（CNN）相比，ResNet 在预测 PET 生产过程和产品质量方面具有更高的准确度（R 2 ≥ 0.9998）。它能准确建立生产参数与产品质量指标之间的映射关系，为智能生产提供理论指导。
{"title":"Utilizing ResNet for enhanced quality prediction in PET production: an AI-driven approach","authors":"Kaiwen Zheng, Jiaoxue Shi, Shichang Chen","doi":"10.1515/polyeng-2024-0048","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0048","url":null,"abstract":"To promote theoretical understanding for optimizing the entire process parameters (temperature, pressure, flow rate, etc.) and quality indicators (molar fraction, end-group concentration, and number-average molecular weight) in the industrial production of polyethylene terephthalate (PET), a dataset construction for production parameters and product quality indicators was accomplished in conjunction with industrial process simulation software. A complete deep learning workflow including data collection, dataset construction, model training, and evaluation was established. A prediction method for process-product quality of PET production based on the residual neural network (ResNet) network was proposed to reduce the complexity of quality control in polyester production. The results show that compared to traditional convolutional neural network (CNN), ResNet has higher accuracy (<jats:italic>R</jats:italic> <jats:sup>2</jats:sup> ≥ 0.9998) in predicting the PET production process and product quality. It can accurately establish the mapping relationship between production parameters and product quality indicators, providing theoretical guidance for intelligent production.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"19 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141502579","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}
A transparent poly(methyl methacrylate-butyl acrylate-hexafluorobutyl methacrylate) stone relics protective material was synthesized using one-pot method. The synthesized polymer was coated on the surface of the stone samples or glass plates. SEM was used to observe the micromorphology of pristine stone and stone covered polymer coating samples. Physical properties of polymer coatings were characterized by FTIR, XRD and TGA-DSC. The conservation properties of polymer coatings were investigated by testing adhesion, transparency, hydrophobicity, mass loss rate and appearance of the simulated stone relics after freeze–thaw, UV irradiation and acid aging processes. Results show that poly (MMA-BA-20.04 %HFMA) outperformed the others with water contact angle remained 108.23°, 109.34° and 106.96° as well as the change of chromaticity difference values of 0.79, 0.02 and 0.08, after freeze-thaw, UV-aging and acid-aging processes, respectively. All these data indicate that the as-synthesized polymer could potentially use in conservating the stone relics due to its superior hydrophobicity, transparency, anti-acid and anti-UV aging properties as well as durability for freeze–thaw.
{"title":"Transparent poly(methyl methacrylate-butyl acrylate-hexafluorobutyl methacrylate) for conservation of stone relics: synthesis and test","authors":"Chuang Ma, Sim Yee Chin, Yue Zhang, Suriati B. Ghazali, Hengqiang Zhang","doi":"10.1515/polyeng-2024-0075","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0075","url":null,"abstract":"A transparent poly(methyl methacrylate-butyl acrylate-hexafluorobutyl methacrylate) stone relics protective material was synthesized using one-pot method. The synthesized polymer was coated on the surface of the stone samples or glass plates. SEM was used to observe the micromorphology of pristine stone and stone covered polymer coating samples. Physical properties of polymer coatings were characterized by FTIR, XRD and TGA-DSC. The conservation properties of polymer coatings were investigated by testing adhesion, transparency, hydrophobicity, mass loss rate and appearance of the simulated stone relics after freeze–thaw, UV irradiation and acid aging processes. Results show that poly (MMA-BA-20.04 %HFMA) outperformed the others with water contact angle remained 108.23°, 109.34° and 106.96° as well as the change of chromaticity difference values of 0.79, 0.02 and 0.08, after freeze-thaw, UV-aging and acid-aging processes, respectively. All these data indicate that the as-synthesized polymer could potentially use in conservating the stone relics due to its superior hydrophobicity, transparency, anti-acid and anti-UV aging properties as well as durability for freeze–thaw.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"22 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520199","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}
Pub Date : 2024-06-27DOI: 10.1515/polyeng-2024-0097
Sulagna Chatterjee, Liana Chatterjee
An optimal portable microfluidic device should ensure least number of accessories for versatile field application. Typically, in such a device fabricated with polydimethylsiloxane (PDMS), the transport of fluid is enabled through a nonconventional pumping mechanism. This pumping system has been demonstrated to utilize the relatively high air permeability of polydimethyl siloxane (PDMS) to transport small volume fluid. In the recent past, microporous PDMS has replaced PDMS in this capacity. Microporous PDMS is typically fabricated through a series of steps where a sacrificial template is used to infiltrate the polymer. This template is removed after the polymer undergoes curing. This method has consistently produced a spongy structure that is nonrigid, sticky, and moist rendering it unwieldy. In this work, we present a novel concept of using camphor (Cinnamomum camphora) as a template to fabricate a dry polymeric sponge. The proposed sponge is molded on a sublimable material, camphor to avoid the additional step of template dissolution. The sponge is demonstrated to be stiff yet flexible rendering it convenient to be compacted into a confined space. Additionally, the sponge is dry and nonsticky as compared to structures that have been generated through sugar leaching.
{"title":"Dry porous polydimethylsiloxane (PDMS): a novel method using camphor as scaffold","authors":"Sulagna Chatterjee, Liana Chatterjee","doi":"10.1515/polyeng-2024-0097","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0097","url":null,"abstract":"An optimal portable microfluidic device should ensure least number of accessories for versatile field application. Typically, in such a device fabricated with polydimethylsiloxane (PDMS), the transport of fluid is enabled through a nonconventional pumping mechanism. This pumping system has been demonstrated to utilize the relatively high air permeability of polydimethyl siloxane (PDMS) to transport small volume fluid. In the recent past, microporous PDMS has replaced PDMS in this capacity. Microporous PDMS is typically fabricated through a series of steps where a sacrificial template is used to infiltrate the polymer. This template is removed after the polymer undergoes curing. This method has consistently produced a spongy structure that is nonrigid, sticky, and moist rendering it unwieldy. In this work, we present a novel concept of using camphor (<jats:italic>Cinnamomum camphora</jats:italic>) as a template to fabricate a dry polymeric sponge. The proposed sponge is molded on a sublimable material, camphor to avoid the additional step of template dissolution. The sponge is demonstrated to be stiff yet flexible rendering it convenient to be compacted into a confined space. Additionally, the sponge is dry and nonsticky as compared to structures that have been generated through sugar leaching.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141520198","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}
Pub Date : 2024-05-28DOI: 10.1515/polyeng-2024-0022
Shufeng Li, Ruxin Gu, Ru Luo, Xinyao Cheng, Xuelin Li
Nanofibrous proton exchange membranes (PEMs) play an important role in improving the performance of the fuel cells. In this paper, two kinds of Nafion nanofibrous PEMs, Nafion-E/W and Nafion-DMF, were fabricated respectively by using ethanol/water (E/W) and N, N-dimethylformamide (DMF) as the solvent and their properties, such as the morphologies, water uptake, area swelling, ion exchange capabilities, conductivities, and mechanical properties were examined. Nafion-E/W nanofibers showed a thick diameter of 6,089 nm and Nafion-DMF nanofibers a thin diameter of 410 nm. Then the two Nafion nanofibers were annealed to provide the PEMs. Compared with Nafion 117 membranes and Nafion-DMF PEMs, Nafion-E/W PEMs showed the greatest water uptake and area swelling of respectively 59.75 % and 30.31 % and the conductivity increased to 0.1405 S/cm, more than twice as much as Nafion 117 membranes, but the broken stress decreased to 5.49 MPa, nearly half of Nafion 117 membranes. Nafion-DMF PEMs showed the lowest water uptake, area swelling, and conductivity of 22.67 %, 10.75 %, and 0.0410 S/cm, and the broken stress reached 14.20 MPa, greater than 11.0 MPa of Nafion 117 membranes. The obtained experimental results are instructive to improve the properties of Nafion PEMs.
{"title":"Enhanced properties of Nafion nanofibrous proton exchange membranes by altering the electrospinning solvents","authors":"Shufeng Li, Ruxin Gu, Ru Luo, Xinyao Cheng, Xuelin Li","doi":"10.1515/polyeng-2024-0022","DOIUrl":"https://doi.org/10.1515/polyeng-2024-0022","url":null,"abstract":"Nanofibrous proton exchange membranes (PEMs) play an important role in improving the performance of the fuel cells. In this paper, two kinds of Nafion nanofibrous PEMs, Nafion-E/W and Nafion-DMF, were fabricated respectively by using ethanol/water (E/W) and <jats:italic>N, N</jats:italic>-dimethylformamide (DMF) as the solvent and their properties, such as the morphologies, water uptake, area swelling, ion exchange capabilities, conductivities, and mechanical properties were examined. Nafion-E/W nanofibers showed a thick diameter of 6,089 nm and Nafion-DMF nanofibers a thin diameter of 410 nm. Then the two Nafion nanofibers were annealed to provide the PEMs. Compared with Nafion 117 membranes and Nafion-DMF PEMs, Nafion-E/W PEMs showed the greatest water uptake and area swelling of respectively 59.75 % and 30.31 % and the conductivity increased to 0.1405 S/cm, more than twice as much as Nafion 117 membranes, but the broken stress decreased to 5.49 MPa, nearly half of Nafion 117 membranes. Nafion-DMF PEMs showed the lowest water uptake, area swelling, and conductivity of 22.67 %, 10.75 %, and 0.0410 S/cm, and the broken stress reached 14.20 MPa, greater than 11.0 MPa of Nafion 117 membranes. The obtained experimental results are instructive to improve the properties of Nafion PEMs.","PeriodicalId":16881,"journal":{"name":"Journal of Polymer Engineering","volume":"40 1","pages":""},"PeriodicalIF":2.0,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141168783","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}
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