Pub Date : 2024-11-04DOI: 10.1016/j.eurpolymj.2024.113550
A bio-based bisphenol compound (DFA) was prepared using bisphenolic acid and furfurylamine in biomass as raw materials. Then, a bio-based amide phthalonitrile monomer (DFAP) was obtained in an environmentally friendly solvent. Nuclear magnetic resonance and Fourier transform infrared spectroscopy (FT-IR) proved the successful synthesis of DFA and DFAP. The curing behavior and curing kinetics of the polymer were studied using FT-IR and differential scanning calorimetry. Calculate the activation energy using the isoconversion method. The SB(m, n) autocatalytic reaction model describing the curing process of poly(DFAP) was modified and fitted by introducing the variable activation energy model. The thermal stability, thermomechanical properties and processing properties of the resin were studied using technologies such as thermogravimetric analyzer, dynamic mechanical analyzer and rheometer. The results show that the prepolymer has a wide processing window and a low melt viscosity. Poly(DFAP) has a high glass transition temperature and excellent thermal stability.
{"title":"A novel bio-based autocatalytic amide-type phthalonitrile monomer: Synthesis, curing kinetics and thermal properties","authors":"","doi":"10.1016/j.eurpolymj.2024.113550","DOIUrl":"10.1016/j.eurpolymj.2024.113550","url":null,"abstract":"<div><div>A bio-based bisphenol compound (DFA) was prepared using bisphenolic acid and furfurylamine in biomass as raw materials. Then, a bio-based amide phthalonitrile monomer (DFAP) was obtained in an environmentally friendly solvent. Nuclear magnetic resonance and Fourier transform infrared spectroscopy (FT-IR) proved the successful synthesis of DFA and DFAP. The curing behavior and curing kinetics of the polymer were studied using FT-IR and differential scanning calorimetry. Calculate the activation energy using the isoconversion method. The SB(m, n) autocatalytic reaction model describing the curing process of poly(DFAP) was modified and fitted by introducing the variable activation energy model. The thermal stability, thermomechanical properties and processing properties of the resin were studied using technologies such as thermogravimetric analyzer, dynamic mechanical analyzer and rheometer. The results show that the prepolymer has a wide processing window and a low melt viscosity. Poly(DFAP) has a high glass transition temperature and excellent thermal stability.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1016/j.eurpolymj.2024.113547
A novel approach to the synthesis of miktoarm star-shaped poly(2-alkyl-2-oxazolines) with calix[8]arene core was developed using a combination of the “core first” (grafting from) and “grafting onto” methods. The star-shaped polymers of A8B8 type with grafted poly(2-ethyl-2-oxazoline) and poly(2-isopropyl-2-oxazoline) arms were obtained using calix[8]arene based multifunctional branching center with sulfonyl chloride initiating moieties and as well as acyl hydrazide termination ones. The polymer structure has been confirmed by 1H NMR spectroscopy and UV spectroscopy. The molar mass characteristics of the samples were determined by size-exclusion chromatographic and light scattering. It was experimentally confirmed that all synthesized polymers had the target arm number, namely 8 or 16. The obtained miktoarm stars were characterized by narrow molar mass distributions, and the polymerization degree of the arms was 15. The synthesized stars had a high intramolecular density, which increased with the arm number. It is shown that the thermoresponsiveness of the studied stars depends on the number and structure of arms and on intramolecular density, while molecular mass is not a decisive factor determining their LCST behavior.
For miktoarm stars, phase separation temperatures do not depend on the grafting configuration of poly(2-ethyl-2-oxazoline) and poly(2-isopropyl-2-oxazoline) on the upper or lower rim of calix[8]arene.
{"title":"Synthesis of miktoarm star-shaped polymers with polyoxazoline arms and macrocyclic calix[8]arene branching center","authors":"","doi":"10.1016/j.eurpolymj.2024.113547","DOIUrl":"10.1016/j.eurpolymj.2024.113547","url":null,"abstract":"<div><div>A novel approach to the synthesis of miktoarm star-shaped poly(2-alkyl-2-oxazolines) with calix[8]arene core was developed using a combination of the “core first” (grafting from) and “grafting onto” methods. The star-shaped polymers of A<sub>8</sub>B<sub>8</sub> type with grafted poly(2-ethyl-2-oxazoline) and poly(2-isopropyl-2-oxazoline) arms were obtained using calix[8]arene based multifunctional branching center with sulfonyl chloride initiating moieties and as well as acyl hydrazide termination ones. The polymer structure has been confirmed by <sup>1</sup>H NMR spectroscopy and UV spectroscopy. The molar mass characteristics of the samples were determined by size-exclusion chromatographic and light scattering. It was experimentally confirmed that all synthesized polymers had the target arm number, namely 8 or 16. The obtained miktoarm stars were characterized by narrow molar mass distributions, and the polymerization degree of the arms was 15. The synthesized stars had a high intramolecular density, which increased with the arm number. It is shown that the thermoresponsiveness of the studied stars depends on the number and structure of arms and on intramolecular density, while molecular mass is not a decisive factor determining their LCST behavior.</div><div>For miktoarm stars, phase separation temperatures do not depend on the grafting configuration of poly(2-ethyl-2-oxazoline) and poly(2-isopropyl-2-oxazoline) on the upper or lower rim of calix[8]arene.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-31DOI: 10.1016/j.eurpolymj.2024.113546
Bottlebrush polymers (BBPs) are a class of branch or graft macromolecules with polymeric side chains attached to linear backbone leading to cylindrical or worm like structures. Due to their unique architecture of polymers with long and densely grafted side chains, BBPs have attracted notable numbers of novel and unique properties useful for various applications from tissue engineering to photonics. Their unique structures characterized by densely-grafted side chains, allows for precise control of their properties and reduces issues with entanglements. This review delineates the recent advances in the synthesis of BBPs via living Ring-Opening Metathesis Polymerization (ROMP) and their properties, applications, highlighting the challenges and solutions in controlling their chemical structures, compositions and uses. Notably, the development of ROMP has transformed the polymer synthesis, specially the synthesis of bottlebrush polymers. ROMP is very powerful technique for achieving very high conversion of macromonomer for a range of concentrations and molecular weights of macromonomer leading to formation of BBPs with systemically varying backbone and side-chain lengths. The combination of BBPs’ versatility with ROMP’s precision in controlling the polymer’s size, shape, and functionality offers significant advantages in materials synthesis. By integrating these approaches, researchers can create customized bottlebrush polymeric materials with tailored properties, enhancing advancements in nanotechnology, energy storage and biomedical engineering. To the best of our knowledge there is no review reported on the synthesis of BBPs via ROMP.
{"title":"Bottlebrush polymers via ring-opening metathesis polymerization (ROMP): Synthesis, properties and applications","authors":"","doi":"10.1016/j.eurpolymj.2024.113546","DOIUrl":"10.1016/j.eurpolymj.2024.113546","url":null,"abstract":"<div><div>Bottlebrush polymers (BBPs) are a class of branch or graft macromolecules with polymeric side chains attached to linear backbone leading to cylindrical or worm like structures. Due to their unique architecture of polymers with long and densely grafted side chains, BBPs have attracted notable numbers of novel and unique properties useful for various applications from tissue engineering to photonics. Their unique structures characterized by densely-grafted side chains, allows for precise control of their properties and reduces issues with entanglements. This review delineates the recent advances in the synthesis of BBPs via living Ring-Opening Metathesis Polymerization (ROMP) and their properties, applications, highlighting the challenges and solutions in controlling their chemical structures, compositions and uses. Notably, the development of ROMP has transformed the polymer synthesis, specially the synthesis of bottlebrush polymers. ROMP is very powerful technique for achieving very high conversion of macromonomer for a range of concentrations and molecular weights of macromonomer leading to formation of BBPs with systemically varying backbone and side-chain lengths. The combination of BBPs’ versatility with ROMP’s precision in controlling the polymer’s size, shape, and functionality offers significant advantages in materials synthesis. By integrating these approaches, researchers can create customized bottlebrush polymeric materials with tailored properties, enhancing advancements in nanotechnology, energy storage and biomedical engineering. To the best of our knowledge there is no review reported on the synthesis of BBPs via ROMP.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.eurpolymj.2024.113510
Developing high-performance epoxy (EP) nanocomposites that balance flame retardancy and mechanical properties has been a significant challenge. In this work, a novel hierarchical hybrid flame retardant HPP@PBA with a bionic octopus tentacle structure was successfully constructed. The organic coating composed of phytic acid (PA) and polyaniline (PANI), and CoFe-Prussian blue analogue nanoparticles (CoFe-PBA), effectively enhances the interfacial interaction between halloysite nanotubes (HNTs) and the EP matrix, promoting the formation of a mechanical interlocking structure. By introducing 5 wt% HPP@PBA, the tensile strength and impact strength of the composites increase by 62.4 % and 38.7 %, respectively. EP/HPP@PBA also exhibits excellent flame retardancy and smoke suppression properties. The limiting oxygen index (LOI) of the EP composites reached 33.0 %, achieving the UL-94 V0 rating. Cone calorimetry test (CCT) shows that, compared with pure EP, the peak of heat release rate (pHRR), total heat release (THR), peak of smoke production rate (pSPR), total smoke production (TSP), and peak of carbon monoxide production (COP) of EP/HPP@PBA are reduced by 40.7 %, 34.0 %, 47.2 %, 42.5 %, and 36.6 %, respectively. Additionally, the flame retardant and mechanical enhancement mechanisms of hybrids in EP composites are systematically investigated. This work provides a feasible approach for preparing multifunctional high-performance EP nanocomposites.
开发兼顾阻燃性和机械性能的高性能环氧（EP）纳米复合材料一直是一项重大挑战。在这项工作中，成功构建了一种具有仿生章鱼触手结构的新型分层混合阻燃剂 HPP@PBA。由植酸（PA）、聚苯胺（PANI）和 CoFe-Prussian blue 类似纳米粒子（CoFe-PBA）组成的有机涂层能有效增强哈洛来石纳米管（HNTs）与 EP 基体之间的界面相互作用，促进机械互锁结构的形成。通过引入 5 wt% 的 HPP@PBA，复合材料的拉伸强度和冲击强度分别提高了 62.4% 和 38.7%。EP/HPP@PBA 还具有优异的阻燃和抑烟性能。EP 复合材料的极限氧指数（LOI）达到 33.0%，达到了 UL-94 V0 等级。锥形量热试验（CCT）表明，与纯 EP 相比，EP/HPP@PBA 的放热峰值（pHRR）、总放热（THR）、产烟峰值（pSPR）、总产烟量（TSP）和一氧化碳产烟峰值（COP）分别降低了 40.7%、34.0%、47.2%、42.5% 和 36.6%。此外，还系统地研究了 EP 复合材料中混合物的阻燃和机械增强机理。这项工作为制备多功能高性能 EP 纳米复合材料提供了一种可行的方法。
{"title":"Bionic octopus tentacle structure-inspired engineering of HPP@PBA nanotubes: Towards mechanically reinforced epoxy nanocomposites with outstanding flame retardancy and smoke suppression","authors":"","doi":"10.1016/j.eurpolymj.2024.113510","DOIUrl":"10.1016/j.eurpolymj.2024.113510","url":null,"abstract":"<div><div>Developing high-performance epoxy (EP) nanocomposites that balance flame retardancy and mechanical properties has been a significant challenge. In this work, a novel hierarchical hybrid flame retardant HPP@PBA with a bionic octopus tentacle structure was successfully constructed. The organic coating composed of phytic acid (PA) and polyaniline (PANI), and CoFe-Prussian blue analogue nanoparticles (CoFe-PBA), effectively enhances the interfacial interaction between halloysite nanotubes (HNTs) and the EP matrix, promoting the formation of a mechanical interlocking structure. By introducing 5 wt% HPP@PBA, the tensile strength and impact strength of the composites increase by 62.4 % and 38.7 %, respectively. EP/HPP@PBA also exhibits excellent flame retardancy and smoke suppression properties. The limiting oxygen index (LOI) of the EP composites reached 33.0 %, achieving the UL-94 V0 rating. Cone calorimetry test (CCT) shows that, compared with pure EP, the peak of heat release rate (pHRR), total heat release (THR), peak of smoke production rate (pSPR), total smoke production (TSP), and peak of carbon monoxide production (COP) of EP/HPP@PBA are reduced by 40.7 %, 34.0 %, 47.2 %, 42.5 %, and 36.6 %, respectively. Additionally, the flame retardant and mechanical enhancement mechanisms of hybrids in EP composites are systematically investigated. This work provides a feasible approach for preparing multifunctional high-performance EP nanocomposites.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-29DOI: 10.1016/j.eurpolymj.2024.113544
Flexible polymer molecular chains are of great interest to researchers in the field of flexible wearable electronics due to their unrivaled flexibility and ductility. However, achieving high toughness, high elasticity, environmental stability and easy machining of flexible electronic materials remains a challenge. In this study, we present a photocurable eutectic gel mainly composed of DMAPS, AAc, Zr4+ and deep eutectic solvents (DES). Due to the strong coordination between zirconium ions and polymer networks, the gel can be endowed with excellent properties, such as excellent tensile strength (1.14 MPa), low hysteresis (5 kJ·m−3) and good adhesion (above 40 kPa). DES can not only give the gel good electrical conductivity, but also maintain the stability of the gel to ensure that the leakage or volatilization of the solvent will not occur in use. The properties mentioned above allow the gel to achieve a sensitivity factor of up to 1.7 over a small strain range, demonstrating its potential applications in the field of flexible strain sensors and triboelectric flexible electrode materials. What’s more, the gel can be used to prepare complex geometric shapes with high precision through digital light processing (DLP) based 3D printing technology. Therefore, this work introduces a novel approach for the development of highly stable flexible wearable devices, which has the potential to expand the applications of eutectic gels.
{"title":"A photocurable ultra-tough eutectic gel with coordination crosslinking used for wearable sensors and TENG flexible electrodes","authors":"","doi":"10.1016/j.eurpolymj.2024.113544","DOIUrl":"10.1016/j.eurpolymj.2024.113544","url":null,"abstract":"<div><div>Flexible polymer molecular chains are of great interest to researchers in the field of flexible wearable electronics due to their unrivaled flexibility and ductility. However, achieving high toughness, high elasticity, environmental stability and easy machining of flexible electronic materials remains a challenge. In this study, we present a photocurable eutectic gel mainly composed of DMAPS, AAc, Zr<sup>4+</sup> and deep eutectic solvents (DES). Due to the strong coordination between zirconium ions and polymer networks, the gel can be endowed with excellent properties, such as excellent tensile strength (1.14 MPa), low hysteresis (5 kJ·m<sup>−3</sup>) and good adhesion (above 40 kPa). DES can not only give the gel good electrical conductivity, but also maintain the stability of the gel to ensure that the leakage or volatilization of the solvent will not occur in use. The properties mentioned above allow the gel to achieve a sensitivity factor of up to 1.7 over a small strain range, demonstrating its potential applications in the field of flexible strain sensors and triboelectric flexible electrode materials. What’s more, the gel can be used to prepare complex geometric shapes with high precision through digital light processing (DLP) based 3D printing technology. Therefore, this work introduces a novel approach for the development of highly stable flexible wearable devices, which has the potential to expand the applications of eutectic gels.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.eurpolymj.2024.113521
In response to the pain, swelling, and redness resulting from inadequate wound hemostasis and anti-inflammatory measures, there is a pressing need to develop wound repair materials capable of promptly stopping bleeding, facilitating painless dressing changes, and expediting wound closure to enhance skin wound recovery. However, comprehensive research is deficient concerning the conformational relationship of hyaluronic acid (HA) with various molecular weights concerning the structure of hydrogel materials. This study aims to address this need by utilizing aminated hyaluronic acid (AHA) and aldehyde-modified dextran (DA) to prepare dextran-based hyaluronic acid hydrogels (DA-AHA) via Schiff base reaction, imbuing them with acute inflammation repair and wound healing promotion properties. In vitro, coagulation experiments demonstrated that the DA-AHA hydrogel could rapidly coagulate blood within 60 s. Subsequent animal experiments corroborated these findings, revealing the hydrogel’s efficacy in significantly shortening wound healing time and accelerating wound closure efficiency. Moreover, MTT and live-death experiments affirmed the non-cytotoxic nature of the synthesized hydrogel. The study delved into the structural regularity and wound-healing efficacy of DA-AHA hydrogel materials featuring various molecular weights. Additionally, it compared the hemostatic and wound-healing properties of (high molecular weight dextran-aminated hyaluronic acid hydrogel) HDA-AHA, demonstrating its superiority in both aspects.
{"title":"Synthesis of a series of dextran-based DA-AHA hydrogels for wound healing dressings","authors":"","doi":"10.1016/j.eurpolymj.2024.113521","DOIUrl":"10.1016/j.eurpolymj.2024.113521","url":null,"abstract":"<div><div>In response to the pain, swelling, and redness resulting from inadequate wound hemostasis and anti-inflammatory measures, there is a pressing need to develop wound repair materials capable of promptly stopping bleeding, facilitating painless dressing changes, and expediting wound closure to enhance skin wound recovery. However, comprehensive research is deficient concerning the conformational relationship of hyaluronic acid (HA) with various molecular weights concerning the structure of hydrogel materials. This study aims to address this need by utilizing aminated hyaluronic acid (AHA) and aldehyde-modified dextran (DA) to prepare dextran-based hyaluronic acid hydrogels (DA-AHA) via Schiff base reaction, imbuing them with acute inflammation repair and wound healing promotion properties. In vitro, coagulation experiments demonstrated that the DA-AHA hydrogel could rapidly coagulate blood within 60 s. Subsequent animal experiments corroborated these findings, revealing the hydrogel’s efficacy in significantly shortening wound healing time and accelerating wound closure efficiency. Moreover, MTT and live-death experiments affirmed the non-cytotoxic nature of the synthesized hydrogel. The study delved into the structural regularity and wound-healing efficacy of DA-AHA hydrogel materials featuring various molecular weights. Additionally, it compared the hemostatic and wound-healing properties of (high molecular weight dextran-aminated hyaluronic acid hydrogel) HDA-AHA, demonstrating its superiority in both aspects.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.eurpolymj.2024.113506
Ketene derivatives have been widely studied in photopolymerization technology system because of their advantages of excellent light absorption and strong photobleaching ability. Nevertheless, the field of research into photoinitiators derived from ketene that exhibit minimal migration and superior solubility is relatively underexplored. In this study, five new polymerizable ketene derivative photoinitiators (CPBA-1 to 5) were designed and synthesized for photoinitiated radical polymerization (FRP). The photoinitiation performance, migration after curing, and solubility of CPBA1-3 in trimethylpropane triacrylate (TMPTA) free radical polymerization (FRP) were investigated and these properties were compared with the industrial photoinitiator 2-isopropylthioxanthone (ITX). The results showed that CPBA-2 had the best C=C conversion rate in TMPTA. Additionally, the migration rate of CPBA-2 is significantly lower than that of ITX, indicating its lower mobility than conventional photoinitiators. Moreover, the higher solubility of CPBA-2 in monomers provides the great potential for its industrial applications.
{"title":"Bis-acrylate functionalized enone as photoinitiators for UV-LED photopolymerization","authors":"","doi":"10.1016/j.eurpolymj.2024.113506","DOIUrl":"10.1016/j.eurpolymj.2024.113506","url":null,"abstract":"<div><div>Ketene derivatives have been widely studied in photopolymerization technology system because of their advantages of excellent light absorption and strong photobleaching ability. Nevertheless, the field of research into photoinitiators derived from ketene that exhibit minimal migration and superior solubility is relatively underexplored. In this study, five new polymerizable ketene derivative photoinitiators (CPBA-1 to 5) were designed and synthesized for photoinitiated radical polymerization (FRP). The photoinitiation performance, migration after curing, and solubility of CPBA1-3 in trimethylpropane triacrylate (TMPTA) free radical polymerization (FRP) were investigated and these properties were compared with the industrial photoinitiator 2-isopropylthioxanthone (ITX). The results showed that CPBA-2 had the best C=C conversion rate in TMPTA. Additionally, the migration rate of CPBA-2 is significantly lower than that of ITX, indicating its lower mobility than conventional photoinitiators. Moreover, the higher solubility of CPBA-2 in monomers provides the great potential for its industrial applications.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.eurpolymj.2024.113522
Liver tissue engineering is an essential approach to improve liver injury repair or regeneration for compensation of donor shortage, in which the combination of scaffolds and bioactive factors play a crucial role. Until now, a minimal number of products are used in clinic for their hurdles of biocompatibility. Here a degradable scaffold system based on chitosan polymers that are cross linked by Schiff reaction was prepared, which exhibits excellent biocompatibility and degradability. Two natural plant components with protective toxicity ability and improved tissue formation were loaded in scaffold to promote the cell proliferation as well as reduced drug dosage, further lowering the bio-toxicity of the scaffold system while ensuring its duration and effectiveness. Furthermore, our scaffold system possesses suitable degradation rate that match the regeneration rate of native tissue, which can maintain mechanical properties to support tissue formation during healing. The experiments results show that the scaffold system has the ability to enhance stem cell differentiation and promote liver regeneration, with non-toxic degradation products. In summary, the non-toxic, degradable scaffold system loaded with plant components holds vast potential in the field of biomedicine, providing a new approach for constructing safe and efficient biomedical materials.
{"title":"Dual plant compounds-loaded chitosan hydrogel-based scaffold promotes cell proliferation for repairing liver injury","authors":"","doi":"10.1016/j.eurpolymj.2024.113522","DOIUrl":"10.1016/j.eurpolymj.2024.113522","url":null,"abstract":"<div><div>Liver tissue engineering is an essential approach to improve liver injury repair or regeneration for compensation of donor shortage, in which the combination of scaffolds and bioactive factors play a crucial role. Until now, a minimal number of products are used in clinic for their hurdles of biocompatibility. Here a degradable scaffold system based on chitosan polymers that are cross linked by Schiff reaction was prepared, which exhibits excellent biocompatibility and degradability. Two natural plant components with protective toxicity ability and improved tissue formation were loaded in scaffold to promote the cell proliferation as well as reduced drug dosage, further lowering the bio-toxicity of the scaffold system while ensuring its duration and effectiveness. Furthermore, our scaffold system possesses suitable degradation rate that match the regeneration rate of native tissue, which can maintain mechanical properties to support tissue formation during healing. The experiments results show that the scaffold system has the ability to enhance stem cell differentiation and promote liver regeneration, with non-toxic degradation products. In summary, the non-toxic, degradable scaffold system loaded with plant components holds vast potential in the field of biomedicine, providing a new approach for constructing safe and efficient biomedical materials.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.eurpolymj.2024.113532
In this review, we comprehensively described the synthetic approaches for the preparation of polythioacetals (PTAs) by step-growth, chain-growth, and post-polymerization modification techniques from the past to the present. In addition, we reviewed the state-of-the-art applications of PTAs as reactive oxygen species (ROS) responsive polymers, chemosensors for Hg2+ ions, and polymers with dynamic covalent bond properties. Since a wide range of reactive oxygen species (ROS) applications of PTAs for cell delivery is beyond the scope of this review, some pioneering works are discussed, and the remaining items are only cited in the text. However, the utilization of PTAs as chemosensors for Hg2+ ions and the dynamic covalent bond properties of PTAs are extensively reviewed here. Also, as less common implementations of PTAs, the proton shelter and the polymeric bone cement examples are described in the text. The practical synthesizability of PTA and its wide range of applications in materials science and bio-based applications indicate that this fundamental reaction will proceed to be used continuously in various disciplines of chemistry in the future.
{"title":"Polythioacetals: From old chemistry to new perspectives","authors":"","doi":"10.1016/j.eurpolymj.2024.113532","DOIUrl":"10.1016/j.eurpolymj.2024.113532","url":null,"abstract":"<div><div>In this review, we comprehensively described the synthetic approaches for the preparation of polythioacetals (PTAs) by step-growth, chain-growth, and post-polymerization modification techniques from the<!--> <!-->past to the<!--> <!-->present. In addition, we reviewed the state-of-the-art applications of PTAs as reactive oxygen species (ROS) responsive polymers, chemosensors for Hg<sup>2+</sup> ions, and polymers with dynamic covalent bond properties. Since a wide range of reactive oxygen species (ROS) applications of PTAs for cell delivery is beyond the scope of this review, some pioneering works are discussed, and the remaining items are only cited in the text. However, the utilization of PTAs as chemosensors for Hg<sup>2+</sup> ions and the dynamic covalent bond properties of PTAs are extensively reviewed here. Also, as less common implementations of PTAs, the proton shelter and the polymeric bone cement examples are described in the text. The practical synthesizability of PTA and its wide range of applications in materials science and bio-based applications indicate that this fundamental reaction will proceed to be used continuously in various disciplines of chemistry in the future.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142572940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-28DOI: 10.1016/j.eurpolymj.2024.113526
In today’s electric power systems, biodegradable and environmentally benign dielectric materials with outstanding dielectric capabilities are essential. Here, a hybrid filler MXene@PDA (M@P) was acquired by coating MXene with polydopamine (PDA), and then it was added into cellulose matrix to manufacture regenerated cellulose/M@P (RC/M@P) composite films. Finally, a crosslinking strategy with glutaraldehyde (GA) assistance was developed to further modify the RC/M@P composite films. The crosslinked composite films (CRC/M@P) had a denser structure with fewer defects, considerably decreased dielectric loss, and significantly strengthened breakdown strength. The highest energy storage density of 3.37 J/cm3 was obtained for CRC/M@P-1 composite film with only 1 wt% M@P at 361.07 MV/m, achieving significant enhancement compared with the original CRC film. Moreover, crosslinking also contributed to the CRC/M@P for achieving better mechanical properties. The excellent comprehensive performances endow CRC/M@P composite films with promising application for the next-generation dielectric capacitors.
{"title":"Glutaraldehyde-assisted crosslinking for the preparation of low dielectric loss and high energy density cellulose composites filled with poly(dopamine) modified MXene","authors":"","doi":"10.1016/j.eurpolymj.2024.113526","DOIUrl":"10.1016/j.eurpolymj.2024.113526","url":null,"abstract":"<div><div>In today’s electric power systems, biodegradable and environmentally benign dielectric materials with outstanding dielectric capabilities are essential. Here, a hybrid filler MXene@PDA (M@P) was acquired by coating MXene with polydopamine (PDA), and then it was added into cellulose matrix to manufacture regenerated cellulose/M@P (RC/M@P) composite films. Finally, a crosslinking strategy with glutaraldehyde (GA) assistance was developed to further modify the RC/M@P composite films. The crosslinked composite films (CRC/M@P) had a denser structure with fewer defects, considerably decreased dielectric loss, and significantly strengthened breakdown strength. The highest energy storage density of 3.37 J/cm<sup>3</sup> was obtained for CRC/M@P-1 composite film with only 1 wt% M@P at 361.07 MV/m, achieving significant enhancement compared with the original CRC film. Moreover, crosslinking also contributed to the CRC/M@P for achieving better mechanical properties. The excellent comprehensive performances endow CRC/M@P composite films with promising application for the next-generation dielectric capacitors.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":null,"pages":null},"PeriodicalIF":5.8,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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