Reactive & Functional Polymers最新文献

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Ionic covalent organic framework as photo-activated nitric oxide generator for cascaded gaseous, photothermal, photodynamic and cationic bactericidal synergistic therapy 离子共价有机框架作为光活化一氧化氮发生器,用于级联气态、光热、光动力和阳离子杀菌协同疗法
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-19 DOI: 10.1016/j.reactfunctpolym.2024.106012
Qian Song , Guoli Sun , Qinghua Yu , Jie Yu , Dandan Xu , Guiyu Zhang , Dangui Wang , Weiwei Bian , Baolong Zhou
{"title":"Ionic covalent organic framework as photo-activated nitric oxide generator for cascaded gaseous, photothermal, photodynamic and cationic bactericidal synergistic therapy","authors":"Qian Song ,&nbsp;Guoli Sun ,&nbsp;Qinghua Yu ,&nbsp;Jie Yu ,&nbsp;Dandan Xu ,&nbsp;Guiyu Zhang ,&nbsp;Dangui Wang ,&nbsp;Weiwei Bian ,&nbsp;Baolong Zhou","doi":"10.1016/j.reactfunctpolym.2024.106012","DOIUrl":"10.1016/j.reactfunctpolym.2024.106012","url":null,"abstract":"<div><p>Despite great advances in bactericidal therapy, it is still hard to achieve satisfactory therapeutic effects using the single antibacterial modality nowadays, especially the emergence of drug-resistant bacteria. To address such challenge, a light-induced synergistic therapeutic platform was facilely constructed by incorporating sodium nitroprusside (SNP) into a biocompatible ionic covalent organic framework (COF), denoted as TD-COF, to combat the bacteria infection. Upon 638 nm laser irradiation, the positive charged therapeutic agents (TD-COF-SNP) with strong affinity to the negatively charged bacterial membrane could realize the photothermal-driven cascaded multimodal synergistic treatments, in which the local high temperature could not only induce the controllable generation of nitric oxide (NO), but also significantly accelerate the formation of reactive oxygen species (ROS) via the photodynamic therapy (PDT), destroying the pathogen structure, and killing pathogenic bacteria. Meanwhile, both the in vitro and in vivo assay revealed the synergistic NO/PTT/PDT/cationic triggered by laser irradiation was also highly effective for the treatment of infected wounds caused by bacteria. This work paves an avenue for the delicately design of COF-based solid state therapeutic agents toward bacteria infection treatment.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"203 ","pages":"Article 106012"},"PeriodicalIF":4.5,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141731842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Challenging POPular opinion: Porous organic polymers for atmospheric water harvesting 挑战大众观点:用于大气集水的多孔有机聚合物
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-18 DOI: 10.1016/j.reactfunctpolym.2024.106014
Paul Schweng , Robert T. Woodward
{"title":"Challenging POPular opinion: Porous organic polymers for atmospheric water harvesting","authors":"Paul Schweng ,&nbsp;Robert T. Woodward","doi":"10.1016/j.reactfunctpolym.2024.106014","DOIUrl":"10.1016/j.reactfunctpolym.2024.106014","url":null,"abstract":"<div><p>As humanity faces growing water scarcity in many parts of the world, innovative solutions are imperative to achieve equitable access to safe drinking water for all. Atmospheric water harvesting (AWH) is a highly promising solution to water scarcity, comprising water adsorption directly from air using hydrophilic adsorbents, followed by collection upon desorption. Porous organic polymers exhibit distinct advantages for AWH, including broad tailorability, desirable porous properties, and outstanding chemical and thermal stability. This perspective outlines the current state-of-the-art in porous organic materials for AWH, distinguishing between reticular and amorphous materials, to discern key properties and outline future design principles. We also outline key performance metrics and provide a guide for the characterisation of such porous organic materials for those seeking to enter the field of AWH.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"203 ","pages":"Article 106014"},"PeriodicalIF":4.5,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1381514824001895/pdfft?md5=3151c324178f72137338cb08888f381b&pid=1-s2.0-S1381514824001895-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141847655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Poly(alkylene 2,4-furanoate)s: The potential of structural isomerism for outstanding sustainable food packaging and unexpected evidence of self-healing microstructure 聚(2,4-呋喃烯酸烷基酯):结构异构性在实现出色的可持续食品包装方面的潜力以及自修复微观结构的意外证据
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-14 DOI: 10.1016/j.reactfunctpolym.2024.106010
Enrico Bianchi , Michelina Soccio , Valentina Siracusa , Massimo Gazzano , Shanmugam Thiyagarajan , Nadia Lotti
{"title":"Poly(alkylene 2,4-furanoate)s: The potential of structural isomerism for outstanding sustainable food packaging and unexpected evidence of self-healing microstructure","authors":"Enrico Bianchi ,&nbsp;Michelina Soccio ,&nbsp;Valentina Siracusa ,&nbsp;Massimo Gazzano ,&nbsp;Shanmugam Thiyagarajan ,&nbsp;Nadia Lotti","doi":"10.1016/j.reactfunctpolym.2024.106010","DOIUrl":"10.1016/j.reactfunctpolym.2024.106010","url":null,"abstract":"<div><p>2,5-furandicarboxylic acid is an extremely appealing renewable chemical building block because of its potential to replace the petrochemical and industrially widespread terephthalic acid via the synthesis of poly(alkylene 2,5-furanoate)s (2,5-PAF). The recent interest in its structural isomer, 2,4-furandicarboxylic acid (2,4-FDCA), opened the study of poly(alkylene 2,4-furanoate)s (2,4-PAF). In this work, 2,4-FDCA was polymerized with linear glycols of increasing chain length, via a solvent-free polycondensation reaction, obtaining high molecular weight 2,4-PAF. Namely, poly(trimethylene 2,4-furanoate) (2,4-PTF), poly(pentamethylene 2,4-furanoate) (2,4-PPeF) and poly(hexamethylene 2,4-furanoate) (2,4-PHF). These polyesters were compression molded into films and subjected to NMR, GPC, WAXS, PLOM, TGA and DSC analyses. The functional properties for food packaging applications were evaluated by mechanical and gas permeability tests. 2,4-PAF had tunable mechanical properties, depending on the glycol used, and in some cases, the mechanical behavior of a thermoplastic elastomer and shape recovery after break. In particular, 2,4-PPeF had outstanding gas barrier properties, while DSC analyses on 2,4-PHF showed an endothermic phenomenon attributed to the isotropization of a partially-ordered phase: it was possible to demonstrate that this phase was disrupted during tensile tests and slowly recovered over time, at room temperature. Overall, the results offer new insights into the structure-property relationships of poly(alkylene 2,4-furanoate)s and display their great potential for the production of biobased, monomaterial, easily recyclable and sustainable food packaging.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"203 ","pages":"Article 106010"},"PeriodicalIF":4.5,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1381514824001858/pdfft?md5=dba9b70546ed68f2595539bdd3c61ad6&pid=1-s2.0-S1381514824001858-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141691728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zwitterionic modification: A strategy to enhance the mechanical properties, lubricity and hemo- and biocompatibility of silicone poly(carbonate urethane urea) 聚硅氧烷聚(碳酸酯尿烷脲增强聚硅氧烷(碳酸酯聚氨酯脲)机械性能、润滑性以及血液和生物相容性的策略
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-14 DOI: 10.1016/j.reactfunctpolym.2024.106007
Zhihua Liu , Bixuan Liu , Chunyang Li , Yonghao Xiao , Haiyang Wei , Jianye Zhou , Zeng-guo Feng
{"title":"Zwitterionic modification: A strategy to enhance the mechanical properties, lubricity and hemo- and biocompatibility of silicone poly(carbonate urethane urea)","authors":"Zhihua Liu ,&nbsp;Bixuan Liu ,&nbsp;Chunyang Li ,&nbsp;Yonghao Xiao ,&nbsp;Haiyang Wei ,&nbsp;Jianye Zhou ,&nbsp;Zeng-guo Feng","doi":"10.1016/j.reactfunctpolym.2024.106007","DOIUrl":"10.1016/j.reactfunctpolym.2024.106007","url":null,"abstract":"<div><p>Incorporating zwitterions into the blood-contacting materials has been demon-strated an effective and convenient strategy to minimize protein adsorption and platelet deposition, but is frequently detrimental to the mechanical properties. Herein a feeding 29.0 mol% sulfobetaine (SB) siloxane poly(carbonate urethane urea) (SSiPCUU) was synthesized and evaluated. Although the equilibrium water uptake ratio was increased to 1.20% markedly depressing the hydrolytic degradation resistance and mechanical properties after the zwitterionic modification, its maximum tensile stress and tear strength in the wet state still kept the highest among all the tested samples because the urea groups created therefrom gave rise to the formation of bifurcating hydrogen bonds making a significant contribution to the mechanical properties alongside the unique ion clusters formed from pendant SB species. As a consequence of zwitterionic incorporation, it exhibited an extremely low friction coefficient indicating an excellent lubricity in a wet environment without any post-treatment. Accordingly, both the nonspecific protein adsorption and platelet adhesion were evidently decreased. Moreover, it also depicted a good transparency. The high lubrication performance is desirable for lessening the damage to human blood vessels and a good transparency is favorable to the visualization of the flow of liquid in the catheter. These results illustrated the great potential of the zwitterionic SSiPCUU used in the preparation of balloon catheters, artificial blood vessels, stent coverings and other blood-contacting medical implants and devices.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"203 ","pages":"Article 106007"},"PeriodicalIF":4.5,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141699352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel cycloaliphatic epoxy monomer with inherent imide and phosphate groups enabled highly flame-retardant epoxy resin 一种新型环脂族环氧单体,其固有的酰亚胺和磷酸基团使其成为高阻燃性环氧树脂
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-14 DOI: 10.1016/j.reactfunctpolym.2024.106011
Hongyan Li, Yonghao Lv, Zhu-bao Shao, Zhiming Jiang
{"title":"A novel cycloaliphatic epoxy monomer with inherent imide and phosphate groups enabled highly flame-retardant epoxy resin","authors":"Hongyan Li,&nbsp;Yonghao Lv,&nbsp;Zhu-bao Shao,&nbsp;Zhiming Jiang","doi":"10.1016/j.reactfunctpolym.2024.106011","DOIUrl":"10.1016/j.reactfunctpolym.2024.106011","url":null,"abstract":"<div><p>Cycloaliphatic epoxy resin exhibits excellent comprehensive properties suitable for application in electrical/electronic materials. However, its combustibility issue is more difficult to be handled in nature than aromatic epoxy resins and has not yet well addressed currently. The synergistic effect of multiple structures is the efficient way to solve this problem. Therefore, a novel cycloaliphatic epoxide monomer containing both imide and phosphate groups was designed via imidization and epoxidation in this study. The epoxide monomer BEMP with high purity was obtained by discussing the epoxidation conditions. Using 4-methyltetrahydrophthalic anhydride (MHHPA) as a hardener, the cured epoxy resin BMEP/MHHPA demonstrated inherently outstanding flame retardancy with a high limited oxygen index (LOI) value of 36.5% and achieved UL-94 V-0 rating. Additionally, BMEP/MHHPA showed a significant reduction of 70.5% in heat release rate (HRR) and 57.7% in total heat release (THR) compared to commercial ERL-4221/MHHPA. The synergistic effect of imide and phosphate groups contributed to strong charring ability and intumescent flame-retardant action, resulting in effectively isolating heat and oxygen, and inhibiting the production of volatile flammable components. This approach provides an efficient method for developing highly fire-safe cycloaliphatic epoxides for use in electrical/electronic applications.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"203 ","pages":"Article 106011"},"PeriodicalIF":4.5,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141710802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Corrigendum to “Sulfurized DOPO synergizes with phenoxytriazine to impart epoxy thermoset fire safety, thermal stability and mechanical toughness” [React. Funct. Polym. 200 (2024)105927] 硫化 DOPO 与苯氧基三嗪协同赋予环氧热固性防火安全性、热稳定性和机械韧性》的更正[React. Funct. Polym.
IF 5.1 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-14 DOI: 10.1016/j.reactfunctpolym.2024.106008
Yuzhao Qi, Xiaolin Ye, Xuanying Huan, Qiu Xu, Shikai Ma, Dongmei Bao, Yupeng Zhang, Haijun Du, Xueqing Hou, Zhu Wen
{"title":"Corrigendum to “Sulfurized DOPO synergizes with phenoxytriazine to impart epoxy thermoset fire safety, thermal stability and mechanical toughness” [React. Funct. Polym. 200 (2024)105927]","authors":"Yuzhao Qi, Xiaolin Ye, Xuanying Huan, Qiu Xu, Shikai Ma, Dongmei Bao, Yupeng Zhang, Haijun Du, Xueqing Hou, Zhu Wen","doi":"10.1016/j.reactfunctpolym.2024.106008","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.106008","url":null,"abstract":"","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"61 1","pages":""},"PeriodicalIF":5.1,"publicationDate":"2024-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141778953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of poly(carbosilane arylacetylene)s with thermal oxidation resistance 具有抗热氧化性的聚碳硅烷芳基乙炔的研究
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-11 DOI: 10.1016/j.reactfunctpolym.2024.106006
Shuaikang Lv, Changjun Gong, Shuyue Liu, Liqiang Wan, Farong Huang, Qiaolong Yuan
{"title":"Investigation of poly(carbosilane arylacetylene)s with thermal oxidation resistance","authors":"Shuaikang Lv,&nbsp;Changjun Gong,&nbsp;Shuyue Liu,&nbsp;Liqiang Wan,&nbsp;Farong Huang,&nbsp;Qiaolong Yuan","doi":"10.1016/j.reactfunctpolym.2024.106006","DOIUrl":"10.1016/j.reactfunctpolym.2024.106006","url":null,"abstract":"<div><p>The aerospace industry demands a resin matrix with excellent thermal oxidation resistance for advanced composites. A series of poly(carbosilane arylacetylene)s (PCSAs) resins with high silicon content were synthesized via arylacetylene Grignard reagents with polychlorocarbosilane polycondensation in this study. The cured PCSAs were obtained by heating at 150 °C for 2 h, 170 °C for 2 h, 210 °C for 2 h, and 250 °C for 4 h. The temperature at which PCSAs lose 5% weight (<em>T</em><sub>d5</sub>) is approximately 600 °C under a nitrogen atmosphere. The cured PCSAs do not exhibit a glass transition temperature in the range of 50 °C ∼ 450 °C. The cured PCSAs demonstrate outstanding thermal oxidation resistance, with a <em>T</em><sub>d5</sub> of approximately 560 °C under the air atmosphere. The cured PCSA with high silicon content can retain up to 75% of its weight when exposed to flowing air for 480 h at 300 °C. The retention of mechanical properties of carbon fiber cloth reinforced PCSAs composites (CF/PCSAs) improves with increasing silicon content after 100 h of thermal aging under flowing air at 300 °C. The increase in silicon content is beneficial for reducing surface cracking of cured resins and preventing internal matrix oxidation. Moreover, cured PCSAs can serve as a precursor to be pyrolyzed at 1500 °C to form <em>β</em>-SiC crystal. These results suggest that PCSAs are suitable as a heat-resistant matrix for advanced composites.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"202 ","pages":"Article 106006"},"PeriodicalIF":4.5,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141623968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Side chain liquid crystalline polysiloxane hydroxamic acids and their liquid crystalline behaviour 侧链液晶聚硅氧烷羟肟酸及其液晶行为
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-11 DOI: 10.1016/j.reactfunctpolym.2024.106009
Chandramauly Sharma , Nirav Pandya , Gaurangi Desai , Yadvendra Agrawal
{"title":"Side chain liquid crystalline polysiloxane hydroxamic acids and their liquid crystalline behaviour","authors":"Chandramauly Sharma ,&nbsp;Nirav Pandya ,&nbsp;Gaurangi Desai ,&nbsp;Yadvendra Agrawal","doi":"10.1016/j.reactfunctpolym.2024.106009","DOIUrl":"10.1016/j.reactfunctpolym.2024.106009","url":null,"abstract":"<div><p>The synthesis and properties of side chain polysiloxane hydroxamic acids have been described. The N-p substituted phenyl hydroxamic acids were synthesized by reacting p - allyloxy benzoyl chloride and acryloyloxy sebacoyl chloride with N-arylhydroxylamines in toluene medium, rendered basic with aqueous suspension of sodium bicarbonate at 0 °C or lower. The synthesized <em>N</em>-phenyl substituted hydroxamic acids were attached to poly(methylhydrosiloxane) via hydrosilylation reaction in the presence of platinum catalyst The polysiloxane hydroxamic acids were characterized by melting point, FT – IR, NMR and Mass spectral techniques. The liquid crystalline behaviour of the side chain polysiloxane hydroxamic acids with allyloxy and acryloylsebacoyloxy spacer have been studied by optical.</p><p>polansed microscopy and differential scanning calorimetry. Side chain liquid crystalline polysiloxane hydroxamic acids with allyloxy spacer (N-p substituted phenyl p-[(3-polysiloxane propyloxy) benzo] hydroxamic acids, (PHA – 1 to PHA −4) show nematic phases, while the second series with acryloylsebacoyloxy spacer (N-p-substituted phenyl (3-polysiloxane propanone) octyl carbonyloxy hydroxamic acids, (PHA – 5 to PHA – 8) show nematic as well as smectic phases. The liquid crystalline behaviour of the side chain polysiloxane hydroxamic acids with allyloxy and acrylsebacoyloxy spacer have been studied.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"202 ","pages":"Article 106009"},"PeriodicalIF":4.5,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141636655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
PDMS-based copolymers with polyurea blocks and 1,2,3-triazole blocks obtained by CuAAC polymerization for 3D printing 通过 CuAAC 聚合技术获得的具有聚脲嵌段和 1,2,3- 三唑嵌段的 PDMS 基共聚物,可用于 3D 打印
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-08 DOI: 10.1016/j.reactfunctpolym.2024.106005
Kirill K. Bakanov , Sofia N. Ardabevskaia , Kseniya A. Bezlepkina , Kseniia S. Klokova , Artur E. Krupnin , Alexander I. Buzin , Dmitriy A. Khanin , Sergei A. Kostrov , Artem V. Bakirov , Fedor V. Drozdov , Sergey N. Chvalun , Aziz M. Muzafarov , Jun Zou , Elena Yu. Kramarenko , Sergey A. Milenin
{"title":"PDMS-based copolymers with polyurea blocks and 1,2,3-triazole blocks obtained by CuAAC polymerization for 3D printing","authors":"Kirill K. Bakanov ,&nbsp;Sofia N. Ardabevskaia ,&nbsp;Kseniya A. Bezlepkina ,&nbsp;Kseniia S. Klokova ,&nbsp;Artur E. Krupnin ,&nbsp;Alexander I. Buzin ,&nbsp;Dmitriy A. Khanin ,&nbsp;Sergei A. Kostrov ,&nbsp;Artem V. Bakirov ,&nbsp;Fedor V. Drozdov ,&nbsp;Sergey N. Chvalun ,&nbsp;Aziz M. Muzafarov ,&nbsp;Jun Zou ,&nbsp;Elena Yu. Kramarenko ,&nbsp;Sergey A. Milenin","doi":"10.1016/j.reactfunctpolym.2024.106005","DOIUrl":"https://doi.org/10.1016/j.reactfunctpolym.2024.106005","url":null,"abstract":"<div><p>Polydimethylsiloxanes with improved mechanical properties that can be processed by 3D printing are in high demand for scientific and practical applications. In our article, we proposed the synthesis of new PDMS copolymers with urethane and triazole fragments using the CuAAC reaction mechanism, as well as 3D printing with the obtained copolymers. Two types of copolymers, with molecular weights of 3000 and 6000 Da of PDMS block length, were prepared and characterized by GPC, IR spectroscopy, TGA, DSC, TMA, SAXS, and rheological measurements to determine their physicochemical properties. The synthesized copolymers were found to be suitable for processing by extrusion 3D printing. This demonstrated the ability to 3D print macroscale models of varying shapes and complexity. The resulting materials retained their printed shape over time.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"202 ","pages":"Article 106005"},"PeriodicalIF":4.5,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141606545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In situ construction of silicon-containing carbon layer by hyper silicone-branched structure endows epoxy/carbon fiber composites with high strength and ablation resistance 通过超硅支化结构原位构建含硅碳层,赋予环氧树脂/碳纤维复合材料高强度和耐烧蚀性
IF 4.5 3区 工程技术
Reactive & Functional Polymers Pub Date : 2024-07-06 DOI: 10.1016/j.reactfunctpolym.2024.106004
Yuhang Zhang, Youquan Ling, Han Zhang, Xiwen Gu, Baowei Qiu, Zhengguang Heng, Yang Chen, Huawei Zou, Mei Liang
{"title":"In situ construction of silicon-containing carbon layer by hyper silicone-branched structure endows epoxy/carbon fiber composites with high strength and ablation resistance","authors":"Yuhang Zhang,&nbsp;Youquan Ling,&nbsp;Han Zhang,&nbsp;Xiwen Gu,&nbsp;Baowei Qiu,&nbsp;Zhengguang Heng,&nbsp;Yang Chen,&nbsp;Huawei Zou,&nbsp;Mei Liang","doi":"10.1016/j.reactfunctpolym.2024.106004","DOIUrl":"10.1016/j.reactfunctpolym.2024.106004","url":null,"abstract":"<div><p>Epoxy/carbon fiber composites are widely used as structural materials in the aerospace field. Improving the ablation resistance of epoxy/carbon fiber composites is of great importance for the fabrication of highly integrated structural-thermal protection materials. In this study, a silicon-modified epoxy/carbon fiber composite was prepared by a hyperbranched structural design approach. By taking advantage of the excellent antioxidant properties of the silicone compounds generated by the pyrolysis of hyperbranched silicone structures, a dense char layer is rapidly constructed on the surface of composites. The characterization and thermal pyrolysis behavior of hyperbranched silicone-modified epoxy resins are analyzed. In the simulated aerodynamic environment of a high-speed vehicle (where the heat flow is 160 kW/m<sup>2</sup>), compared with epoxy/CF composites, the value of the mass loss rate of modified composites underwent a reduction exceeding 80%, accompanied by a 60.3 °C decrease in the maximum back-surface temperature. More significantly, the post-ablation mechanical properties were evaluated through a three-point bending test, revealing that the modified composites retained over 95% of their initial flexural strength and modulus after simulated pneumatic heating. This approach offers a new approach to manufacture structurally simple, integrated structure-thermal protection systems.</p></div>","PeriodicalId":20916,"journal":{"name":"Reactive & Functional Polymers","volume":"203 ","pages":"Article 106004"},"PeriodicalIF":4.5,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141698521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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