Pub Date : 2023-05-11DOI: 10.1080/10601325.2023.2208604
Jingqing Jia, Rongchang Peng, Yanjing Gao, F. Sun
Abstract In this article, three polymerizable polysiloxane monomers with different chain lengths (MA-Sin, n = 3,6,9) have been synthesized, and then MA-Sin was mixed with disulfide monomer (SA) and different acrylate monomers in certain proportion to obtain a series of photopolymerizable systems. The effects of the contents of SA and MA-Sin, and the chain length of MA-Sin on the photopolymerization kinetics, volume shrinkage, water contact angle, thermal resistance, glass transition temperature (T g), tensile properties and degradability of the photocured films were explored in detail. The results show that the content and the chain length of MA-Sin have no significant effect on the final double bond conversion, which reaches about 94%. With the increase of SA content, the volume shrinkage of the photocured film descends and eventually drops to 3.23%. The addition of MA-Sin contributes to improve thermal stability and hydrophobicity. With the lengthening of the chain length of MA-Sin, the water contact angle, tensile strength, elongation at break and thermal resistance of the photocured film were enhanced, whereas T g is decreased. More importantly, the SA endows the photocured films with good degradability. Graphical Abstract The acrylate photopolymerization systems containing disulfide monomer (SA) and polysiloxane monomer (MA-Sin, n = 3,6,9) exhibit excellent photopolymerization property, low volume shrinkage (3.42%), outstanding degradation property, and improved thermostability and hydrophobicity.
摘要本文合成了三种不同链长的聚硅氧烷单体(MA-Sin, n = 3,6,9)，然后将MA-Sin与二硫单体(SA)和不同的丙烯酸酯单体按一定比例混合，得到一系列可光聚合的体系。考察了SA和MA-Sin的含量以及MA-Sin的链长对光固化膜的光聚合动力学、体积收缩率、水接触角、热阻、玻璃化转变温度(T g)、拉伸性能和降解性能的影响。结果表明，MA-Sin的含量和链长对最终的双键转化率没有显著影响，达到94%左右。随着SA含量的增加，光固化膜的体积收缩率逐渐下降，最终降至3.23%。MA-Sin的加入有助于提高热稳定性和疏水性。随着MA-Sin链长的延长，光固化膜的水接触角、抗拉强度、断裂伸长率和热阻均增强，而tg减小。更重要的是，SA使光固化膜具有良好的降解性。摘要含二硫单体(SA)和聚硅氧烷单体(MA-Sin, n = 3,6,9)的丙烯酸酯光聚合体系具有优异的光聚合性能、低体积收缩率(3.42%)、优异的降解性能、良好的热稳定性和疏水性。
{"title":"Preparation and property study of photocurable polysiloxane polyacrylate materials containing S—S bonds","authors":"Jingqing Jia, Rongchang Peng, Yanjing Gao, F. Sun","doi":"10.1080/10601325.2023.2208604","DOIUrl":"https://doi.org/10.1080/10601325.2023.2208604","url":null,"abstract":"Abstract In this article, three polymerizable polysiloxane monomers with different chain lengths (MA-Sin, n = 3,6,9) have been synthesized, and then MA-Sin was mixed with disulfide monomer (SA) and different acrylate monomers in certain proportion to obtain a series of photopolymerizable systems. The effects of the contents of SA and MA-Sin, and the chain length of MA-Sin on the photopolymerization kinetics, volume shrinkage, water contact angle, thermal resistance, glass transition temperature (T g), tensile properties and degradability of the photocured films were explored in detail. The results show that the content and the chain length of MA-Sin have no significant effect on the final double bond conversion, which reaches about 94%. With the increase of SA content, the volume shrinkage of the photocured film descends and eventually drops to 3.23%. The addition of MA-Sin contributes to improve thermal stability and hydrophobicity. With the lengthening of the chain length of MA-Sin, the water contact angle, tensile strength, elongation at break and thermal resistance of the photocured film were enhanced, whereas T g is decreased. More importantly, the SA endows the photocured films with good degradability. Graphical Abstract The acrylate photopolymerization systems containing disulfide monomer (SA) and polysiloxane monomer (MA-Sin, n = 3,6,9) exhibit excellent photopolymerization property, low volume shrinkage (3.42%), outstanding degradation property, and improved thermostability and hydrophobicity.","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"31 1","pages":"375 - 383"},"PeriodicalIF":0.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85372852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2206857
R. K. Saroj, Ruchi Chawla, P. Dutta
Abstract Chitosan β-ketosulfone derivative was synthesized by chemical modification of chitosan with in situ generated β-ketosulfone using styrene, benzenesulfinic acid sodium salt in the presence of potassium persulphate and air in an aqueous medium. The chemical structure of the derivative was confirmed by various characterization techniques. The IR spectrum of chitosan β-ketosulfone showed new bands at 2366 cm−1 and 1367 cm−1 corresponding to the imine and sulfone functional group respectively. In the 1H NMR spectrum of the derivative, chitosan proton signals and new proton signals between δ 7.3 ppm and 7.7 ppm (aromatic region) were observed. Chitosan β-ketosulfone derivative showed better antimicrobial activity against A. niger fungi, gram-negative (E. coli) and gram-positive (B. subtilis) bacteria than native chitosan. The derivative also exhibited improved antioxidant activity over chitosan. The DPPH and ABTS radical scavenging activity of chitosan β-ketosulfone derivative at 1.6 mg/mL concentration were observed as 68.6 ± 1.5% and 90.2 ± 1.4% respectively at the same concentration. Moreover, the MTT cytotoxicity assay of the synthesized product on PBMCs (peripheral blood mononuclear cells) and HepG2 cells displayed encouraging results, which pave the pathway for the utilization of the derivative for further biomedical applications. Graphical Abstract Highlights Chitosan β-ketosulfone derivative synthesized via a novel route starting from simple starting materials better antimicrobial activity than native chitosan improved antioxidant activity over chitosan established on the basis of DPPH and ABTS radical scavenging assay potent anti-cancer activity
{"title":"One-pot synthesis of sulfone-based chitosan derivatives from alkene: characterization, antimicrobial, antioxidant and anti-cancer activity","authors":"R. K. Saroj, Ruchi Chawla, P. Dutta","doi":"10.1080/10601325.2023.2206857","DOIUrl":"https://doi.org/10.1080/10601325.2023.2206857","url":null,"abstract":"Abstract Chitosan β-ketosulfone derivative was synthesized by chemical modification of chitosan with in situ generated β-ketosulfone using styrene, benzenesulfinic acid sodium salt in the presence of potassium persulphate and air in an aqueous medium. The chemical structure of the derivative was confirmed by various characterization techniques. The IR spectrum of chitosan β-ketosulfone showed new bands at 2366 cm−1 and 1367 cm−1 corresponding to the imine and sulfone functional group respectively. In the 1H NMR spectrum of the derivative, chitosan proton signals and new proton signals between δ 7.3 ppm and 7.7 ppm (aromatic region) were observed. Chitosan β-ketosulfone derivative showed better antimicrobial activity against A. niger fungi, gram-negative (E. coli) and gram-positive (B. subtilis) bacteria than native chitosan. The derivative also exhibited improved antioxidant activity over chitosan. The DPPH and ABTS radical scavenging activity of chitosan β-ketosulfone derivative at 1.6 mg/mL concentration were observed as 68.6 ± 1.5% and 90.2 ± 1.4% respectively at the same concentration. Moreover, the MTT cytotoxicity assay of the synthesized product on PBMCs (peripheral blood mononuclear cells) and HepG2 cells displayed encouraging results, which pave the pathway for the utilization of the derivative for further biomedical applications. Graphical Abstract Highlights Chitosan β-ketosulfone derivative synthesized via a novel route starting from simple starting materials better antimicrobial activity than native chitosan improved antioxidant activity over chitosan established on the basis of DPPH and ABTS radical scavenging assay potent anti-cancer activity","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"12 1","pages":"367 - 373"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88282847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2210188
Zhong-Xing Jiang, Hui Zhao
Abstract Post-polymerization modification of pendant-activated ester groups on polymer backbones is a versatile tool to obtain multifunctional water-soluble polymers that cannot be synthesized by typical methods of polymerization. For the first time, short-chain PEG functionalized hydroxybenzoic acid esters (PHBE) were employed to synthesize novel monomers and polymers. The corresponding PHBE-bearing polymers were successfully synthesized for post-polymerization modification by free radical polymerization. More significantly, acrylic PEG functionalized hydroxybenzoic acid esters polymers showed traceless hydrolysis at room temperature for more than 10 days. Furthermore, the multifunctional PHBE-bearing polymers could be directly conjugated to water-soluble amines in water at room temperature. Therefore, this procedure provides an alternative route to well-defined, multifunctional, water-soluble polymers for a range of applications. Graphical Abstract
{"title":"Water-soluble and hydrolysis-resistant activated ester polymers: Synthesis, characterization, and application for preparing functional polymers","authors":"Zhong-Xing Jiang, Hui Zhao","doi":"10.1080/10601325.2023.2210188","DOIUrl":"https://doi.org/10.1080/10601325.2023.2210188","url":null,"abstract":"Abstract Post-polymerization modification of pendant-activated ester groups on polymer backbones is a versatile tool to obtain multifunctional water-soluble polymers that cannot be synthesized by typical methods of polymerization. For the first time, short-chain PEG functionalized hydroxybenzoic acid esters (PHBE) were employed to synthesize novel monomers and polymers. The corresponding PHBE-bearing polymers were successfully synthesized for post-polymerization modification by free radical polymerization. More significantly, acrylic PEG functionalized hydroxybenzoic acid esters polymers showed traceless hydrolysis at room temperature for more than 10 days. Furthermore, the multifunctional PHBE-bearing polymers could be directly conjugated to water-soluble amines in water at room temperature. Therefore, this procedure provides an alternative route to well-defined, multifunctional, water-soluble polymers for a range of applications. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"28 1","pages":"358 - 366"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76584202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2210172
Ayesha Kausar
Abstract Porphyrins is a unique heterocyclic molecule with four modified pyrrole rings interconnected at α carbon atoms via methine groups. The potential of porphyrin has been enhanced by developing the linked nanostructures with nanocarbons (carbon nanotube, graphene and fullerene) through physical/covalent electron donor-acceptor interactions. The porphyrin linked nanocarbon nanostructures have been reinforced in the polymeric matrices such as thermoplastic and conjugated polymers using facile approaches. The polymer/porphyrin linked nanocarbon nanocomposite revealed several remarkable characteristics like high surface area, conductivity, optical, thermal, mechanical capacitance, sensing and photocatalytic features. The high-performance nanocomposite nanostructures have been employed in sensor, supercapacitor and solar cell applications. Graphical Abstract
{"title":"Porphyrin linked carbon nanostructures in polymeric nanocomposite—state-of-the-art and headways","authors":"Ayesha Kausar","doi":"10.1080/10601325.2023.2210172","DOIUrl":"https://doi.org/10.1080/10601325.2023.2210172","url":null,"abstract":"Abstract Porphyrins is a unique heterocyclic molecule with four modified pyrrole rings interconnected at α carbon atoms via methine groups. The potential of porphyrin has been enhanced by developing the linked nanostructures with nanocarbons (carbon nanotube, graphene and fullerene) through physical/covalent electron donor-acceptor interactions. The porphyrin linked nanocarbon nanostructures have been reinforced in the polymeric matrices such as thermoplastic and conjugated polymers using facile approaches. The polymer/porphyrin linked nanocarbon nanocomposite revealed several remarkable characteristics like high surface area, conductivity, optical, thermal, mechanical capacitance, sensing and photocatalytic features. The high-performance nanocomposite nanostructures have been employed in sensor, supercapacitor and solar cell applications. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"37 1","pages":"321 - 335"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75499920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2206860
Twinkal Patel, J. Oh
Abstract Covalent adaptive polymeric networks covalently crosslinked with dynamic covalent bonds that undergo reversible exchange reaction hold good mechanical properties, dimensional stability, and solvent resistance as conventional thermosets and furthermore exhibit self-healability, reprocessability, sustainability and recyclability. Among many dynamic covalent bonds and interactions, hindered urea bond (HUB) that contains a bulky group on one of the two nitrogen atoms is promising for the development of dynamic covalent network materials. The developed HUB-bearing networks have been utilized for various applications requiring dynamic properties, such as energy harvesting and storage, sensor, flexible and wearable electronics, and surface coatings. This review summarizes the development of effective strategies to fabricate dynamic polymer networks based on HUBs with focus on the design and synthesis of effective HUBs with various bulkyamino groups as well as the synthesis of various polymeric materials. Graphical Abstract
{"title":"Dynamic covalent adaptive polymer network materials based on hindered urea bonds","authors":"Twinkal Patel, J. Oh","doi":"10.1080/10601325.2023.2206860","DOIUrl":"https://doi.org/10.1080/10601325.2023.2206860","url":null,"abstract":"Abstract Covalent adaptive polymeric networks covalently crosslinked with dynamic covalent bonds that undergo reversible exchange reaction hold good mechanical properties, dimensional stability, and solvent resistance as conventional thermosets and furthermore exhibit self-healability, reprocessability, sustainability and recyclability. Among many dynamic covalent bonds and interactions, hindered urea bond (HUB) that contains a bulky group on one of the two nitrogen atoms is promising for the development of dynamic covalent network materials. The developed HUB-bearing networks have been utilized for various applications requiring dynamic properties, such as energy harvesting and storage, sensor, flexible and wearable electronics, and surface coatings. This review summarizes the development of effective strategies to fabricate dynamic polymer networks based on HUBs with focus on the design and synthesis of effective HUBs with various bulkyamino groups as well as the synthesis of various polymeric materials. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"10 1","pages":"307 - 320"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80254961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-18DOI: 10.1080/10601325.2023.2200392
Shahrzad Pashapour Yeganeh, D. Zaarei, M. Ehsani, M. Kalaee, A. Oromiehie
Abstract For many years, Bisphenol A (BPA) based epoxy resins have been used as coating material for foodstuff cans because of their appropriate properties. Recently, with attention to the harmful health effects of BPA derivatives, limitation of the usage of epoxy resins has escalated. In this research, using Taguchi experimental design method, different nanocomposite coatings based on hybrid resinous materials containing different amounts of epoxy and polyester and silica nanoparticles were formulated. The migration properties of formulated coatings were investigated based on the standard methods. The results showed that the 45 wt.% replacement of epoxy by polyester resin in combination with 2 wt. % of nano silica, had not any inverse effect on needed mechanical, physical and chemical properties of optimized formulation and, at the same time, migration of BPA and toxic materials were in the acceptable ranges, based on the EN1186-EU 10:2011 standard. Graphical Abstract
{"title":"A novel strategy for foodstuff can coatings: Hybrid resinous materials beside silica nanoparticles","authors":"Shahrzad Pashapour Yeganeh, D. Zaarei, M. Ehsani, M. Kalaee, A. Oromiehie","doi":"10.1080/10601325.2023.2200392","DOIUrl":"https://doi.org/10.1080/10601325.2023.2200392","url":null,"abstract":"Abstract For many years, Bisphenol A (BPA) based epoxy resins have been used as coating material for foodstuff cans because of their appropriate properties. Recently, with attention to the harmful health effects of BPA derivatives, limitation of the usage of epoxy resins has escalated. In this research, using Taguchi experimental design method, different nanocomposite coatings based on hybrid resinous materials containing different amounts of epoxy and polyester and silica nanoparticles were formulated. The migration properties of formulated coatings were investigated based on the standard methods. The results showed that the 45 wt.% replacement of epoxy by polyester resin in combination with 2 wt. % of nano silica, had not any inverse effect on needed mechanical, physical and chemical properties of optimized formulation and, at the same time, migration of BPA and toxic materials were in the acceptable ranges, based on the EN1186-EU 10:2011 standard. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"1 1","pages":"346 - 357"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82763908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-08DOI: 10.1080/10601325.2023.2195879
Yuan An, Rui Zhai, Jinni Chen, Peng Xie
Abstract Cervical cancer ranks as the second most common female malignancy after breast cancer. The present study investigated inhibiting the growth of HeLa cervical cancer cells. A novel pH-responsive carboxymethyl chitosan (CMCS) hydrogel was prepared by free radical polymerization and then loaded with a linalool/water Pickering emulsion. The experimental results showed that the hydrogels had a high swelling rate and excellent pH responsiveness and provided sustained release of linalool. In terms of in vitro cytotoxicity, the hydrogels were biocompatible with HeLa cells, but the linalool-loaded hydrogels showed good antitumor performance against HeLa cells. The pH-responsive linalool-loaded CMCS hydrogels prepared in this work released a significant amount of linalool in the acidic cervical environment, thus inhibiting HeLa tumor cells. These data implied that linalool CMCS hydrogels may have good application prospects in the treatment of cervical carcinoma. Graphical Abstract
{"title":"Preparation and application of a novel pH-responsive linalool carboxymethyl chitosan hydrogel","authors":"Yuan An, Rui Zhai, Jinni Chen, Peng Xie","doi":"10.1080/10601325.2023.2195879","DOIUrl":"https://doi.org/10.1080/10601325.2023.2195879","url":null,"abstract":"Abstract Cervical cancer ranks as the second most common female malignancy after breast cancer. The present study investigated inhibiting the growth of HeLa cervical cancer cells. A novel pH-responsive carboxymethyl chitosan (CMCS) hydrogel was prepared by free radical polymerization and then loaded with a linalool/water Pickering emulsion. The experimental results showed that the hydrogels had a high swelling rate and excellent pH responsiveness and provided sustained release of linalool. In terms of in vitro cytotoxicity, the hydrogels were biocompatible with HeLa cells, but the linalool-loaded hydrogels showed good antitumor performance against HeLa cells. The pH-responsive linalool-loaded CMCS hydrogels prepared in this work released a significant amount of linalool in the acidic cervical environment, thus inhibiting HeLa tumor cells. These data implied that linalool CMCS hydrogels may have good application prospects in the treatment of cervical carcinoma. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"65 1","pages":"336 - 345"},"PeriodicalIF":0.0,"publicationDate":"2023-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91080699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/10601325.2023.2193582
Seyedeh Shima Mohammadi, S. S. Shafiei
Abstract In this study, Poly (ε-caprolactone) (PCL)/Gelatin/TiO2 nanofibrous scaffolds were prepared using electrospinning. The effects of TiO2 nanoparticles (NPs) addition on morphology, mechanical, chemical, thermal, and cellular behavior, and antibacterial properties of PCL/gelatin scaffolds were investigated. Different amounts of TiO2 NPs (0.06, 0.6, and 1 w/v %) were incorporated into the polymer blend to form a homogenous nanocomposite solution. The experimental results exhibited that the hydrophilicity of the scaffolds was improved by incorporating TiO2 NPs, as shown by the water contact angle measurement. Also, the mechanical and thermal behaviors of fabricated scaffolds were enhanced. Moreover, Human bone marrow-derived mesenchymal stem cells (hMSC) were used to investigate the bioactivity and biocompatibility of scaffolds. The MTT assay results showed no toxicity effect for scaffolds. However, releasing reactive oxygen at the highest concentration of TiO2 was remarkably increased, resulting in cell toxicity. Hybridizing biopolymer with TiO2 nanoparticles improves its bone regeneration capability. Thereby, incorporating an optimum amount of TiO2 NPs into PCL/Gelatin composites could be a promising approach for bone tissue engineering applications. Graphical Abstract
{"title":"Electrospun biodegradable scaffolds based on poly (ε-caprolactone)/gelatin containing titanium dioxide for bone tissue engineering application; in vitro study","authors":"Seyedeh Shima Mohammadi, S. S. Shafiei","doi":"10.1080/10601325.2023.2193582","DOIUrl":"https://doi.org/10.1080/10601325.2023.2193582","url":null,"abstract":"Abstract In this study, Poly (ε-caprolactone) (PCL)/Gelatin/TiO2 nanofibrous scaffolds were prepared using electrospinning. The effects of TiO2 nanoparticles (NPs) addition on morphology, mechanical, chemical, thermal, and cellular behavior, and antibacterial properties of PCL/gelatin scaffolds were investigated. Different amounts of TiO2 NPs (0.06, 0.6, and 1 w/v %) were incorporated into the polymer blend to form a homogenous nanocomposite solution. The experimental results exhibited that the hydrophilicity of the scaffolds was improved by incorporating TiO2 NPs, as shown by the water contact angle measurement. Also, the mechanical and thermal behaviors of fabricated scaffolds were enhanced. Moreover, Human bone marrow-derived mesenchymal stem cells (hMSC) were used to investigate the bioactivity and biocompatibility of scaffolds. The MTT assay results showed no toxicity effect for scaffolds. However, releasing reactive oxygen at the highest concentration of TiO2 was remarkably increased, resulting in cell toxicity. Hybridizing biopolymer with TiO2 nanoparticles improves its bone regeneration capability. Thereby, incorporating an optimum amount of TiO2 NPs into PCL/Gelatin composites could be a promising approach for bone tissue engineering applications. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"25 1","pages":"270 - 281"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79249177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/10601325.2023.2195947
M. Islam, I. C. Çetinkaya, T. Eren, M. Tülü
Abstract Oxanorbornene cored 0.5, 1.5 and 2.5 generation ester terminated PAMAM dendronized monomers with 2 and 6 carbon-containing alkyl spacer in the middle of oxanorbornene core and dendronized branching were synthesized. Monomers were polymerized through the ring-opening metathesis polymerization (ROMP) technique by using 2nd and 3rd generation Grubbs catalysts to get dendronized ROMP polymers. It was found that Grubbs 3rd generation catalyst works well for 0.5 generation dendronized ROMP polymer whereas Grubbs 2nd generation catalyst works for the higher generation. We also found the linker effect during polymerization as six-carbon linker monomers polymerize with high yield along with higher generation. Finally, dendronized ROMP-based PAMAM encapsulated zero valent Cu nanoparticle was synthesized by using a reducing agent, NaBH4. The catalytic activity of this nanoparticle was further investigated from the reduction of 4-nitrophenol to 4-aminophenol. Graphical Abstract
{"title":"Synthesis of dendronized PAMAM grafted ROMP polymers","authors":"M. Islam, I. C. Çetinkaya, T. Eren, M. Tülü","doi":"10.1080/10601325.2023.2195947","DOIUrl":"https://doi.org/10.1080/10601325.2023.2195947","url":null,"abstract":"Abstract Oxanorbornene cored 0.5, 1.5 and 2.5 generation ester terminated PAMAM dendronized monomers with 2 and 6 carbon-containing alkyl spacer in the middle of oxanorbornene core and dendronized branching were synthesized. Monomers were polymerized through the ring-opening metathesis polymerization (ROMP) technique by using 2nd and 3rd generation Grubbs catalysts to get dendronized ROMP polymers. It was found that Grubbs 3rd generation catalyst works well for 0.5 generation dendronized ROMP polymer whereas Grubbs 2nd generation catalyst works for the higher generation. We also found the linker effect during polymerization as six-carbon linker monomers polymerize with high yield along with higher generation. Finally, dendronized ROMP-based PAMAM encapsulated zero valent Cu nanoparticle was synthesized by using a reducing agent, NaBH4. The catalytic activity of this nanoparticle was further investigated from the reduction of 4-nitrophenol to 4-aminophenol. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"306 1","pages":"282 - 296"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77446923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/10601325.2022.2138763
Guorong Qiu, Wenshi Ma
Abstract The polyimides were prepared by pyromellitic dianhydride (PMDA) or 4,4'-(4,4'-Isopropylidenediphenoxy)diphthalic anhydride (BPADA) as dianhydride monomer and 1,4-bis(4-aminophenoxy)benzene(TPE-Q) or 1,3-bis(4-aminophenoxy)benzene(TPE-R) as diamine monomer. The polyimides were well characterized by FT-IR, thermogravimetric analysis, dynamic thermomechanical analysis, dielectric measurement and tensile test. The flexibility of polyimide molecular chain was judged by the comparison of molecular volumes, molecular length and conformation transition energy through molecular simulations. Graphical Abstract
{"title":"Low dielectric and thermal properties of polyimides based on PMDA, BPADA, TPE-Q and TPE-R","authors":"Guorong Qiu, Wenshi Ma","doi":"10.1080/10601325.2022.2138763","DOIUrl":"https://doi.org/10.1080/10601325.2022.2138763","url":null,"abstract":"Abstract The polyimides were prepared by pyromellitic dianhydride (PMDA) or 4,4'-(4,4'-Isopropylidenediphenoxy)diphthalic anhydride (BPADA) as dianhydride monomer and 1,4-bis(4-aminophenoxy)benzene(TPE-Q) or 1,3-bis(4-aminophenoxy)benzene(TPE-R) as diamine monomer. The polyimides were well characterized by FT-IR, thermogravimetric analysis, dynamic thermomechanical analysis, dielectric measurement and tensile test. The flexibility of polyimide molecular chain was judged by the comparison of molecular volumes, molecular length and conformation transition energy through molecular simulations. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"38 1","pages":"297 - 305"},"PeriodicalIF":0.0,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90120350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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