Reactive & Functional Polymers最新文献_第9页

Biointerfacial characteristics between macrophage cells and biocompatible hydrogels: Cell colonization capacity of 3D scaffolds 巨噬细胞与生物相容性水凝胶之间的生物界面特性：3D支架的细胞定植能力

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106560

Rocio Bonino , Virginia Capella , Nahir Panozzo Lacunza , Martin Broglia , Cesar Barbero , Pablo Bosch , Nancy Rodriguez , Ana C. Liaudat , Claudia R. Rivarola

Soft synthetic materials based on hydrogels with adequate biointerfacial properties to interact with living systems are being developed for biomedical applications. Macrophage cells exposed to synthetic materials play a fundamental role in indicating if an inflammation process is initiated. To propose new hydrogels such as cell scaffolds, the biointerfacial properties, biocompatibility and immune response of murine (RAW 264.7) and bovine (BoMac) macrophage cells exposed to hydrogels of different chemical composition are analysed. The hydrogels based on N-isopropylacrylamide (NIPAM) and copolymerized with cationic ((3-(acrylamidopropyl) trimethylammonium chloride, APTA), anionic (2-acrylamidopropane sulfonic acid, AMPS), and neutral (N-Tris((hydroxymethyl)methyl) acrylamide, THMA) comonomers are synthesized by cryopolymerization at −18 °C and room temperature (∼25 °C). Interfacial properties of hydrogels in culture medium regarded to water are valued by swelling capacity, volume phase transition temperature (VPTT), and contact angles. Only PNIPAM and PNIPAM-co-3 %APTA hydrogels are biocompatible against macrophage cells, showing a process of adaptation without causing cellular damage or significant immune response. Then, the in vitro cell migration assays are carried out with both macroporous hydrogels. Cell scraping (or wound) technique demonstrates that cells faster colonize the 3D hydrogels than the negative (without hydrogel) and positive (E. coli homogenate) control systems. Therefore, macroporosity and biointerfacial characteristics of these materials are adequate as scaffolds to induce the 3D tissue regenerative and promote wound healing as a new biomedical treatment.

基于水凝胶的软合成材料具有足够的生物界面特性，可以与生命系统相互作用，正在开发用于生物医学应用。巨噬细胞暴露于合成材料中，在指示炎症过程是否启动方面起着重要作用。为了提出新的细胞支架水凝胶，分析了不同化学成分的水凝胶对小鼠（RAW 264.7）和牛（BoMac）巨噬细胞的生物界面特性、生物相容性和免疫反应的影响。以n -异丙基丙烯酰胺（NIPAM）为基础，与阳离子(（3-（丙烯酰胺丙基）三甲基氯化铵（APTA））、阴离子（2-丙烯酰胺丙烷磺酸（AMPS））和中性（n -三（羟甲基）甲基丙烯酰胺（THMA））共聚物共聚，在- 18℃和室温（~ 25℃）下低温聚合合成了水凝胶。水凝胶在水培养基中的界面性质通过膨胀容量、体积相变温度（VPTT）和接触角来评价。只有PNIPAM和PNIPAM-co- 3% APTA水凝胶对巨噬细胞具有生物相容性，表现出一种适应过程，而不会引起细胞损伤或显著的免疫反应。然后，用这两种大孔水凝胶进行体外细胞迁移实验。细胞刮擦（或伤口）技术表明，细胞比阴性（无水凝胶）和阳性（大肠杆菌匀浆）对照系统更快地定植3D水凝胶。因此，这些材料的大孔隙度和生物界面特性足以作为诱导三维组织再生和促进伤口愈合的支架，成为一种新的生物医学治疗方法。

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引用次数: 0

Rational design of phenol-functionalized mixed-shell polymer particles for tailored antioxidant pickering emulsions as an enzymatic microreactor 合理设计酚功能化混合壳聚合物微粒，用于定制抗氧化酸洗乳剂作为酶促微反应器

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-21 DOI: 10.1016/j.reactfunctpolym.2025.106574

Xinyi Wu , Siqi Zhu , Siqi Zheng , Guoxiang Wang , Yong Gao

The preparation of antioxidant Pickering emulsions and their application as enzymatic reaction platform for the ester hydrolysis were indicated in this study. Mixed shell polymer particles (MSPPs), exhibiting a homogeneous poly(styrene-alt-maleic anhydride) core and mixed poly (oligo(ethylene glycol) methyl ether methacrylate/polystyrene shells, were first synthesized via one-pot RAFT mediated polymerization induced self-assembly strategy, which were further functionalized with p-aminophenol (PAP). The resulting functionalized MSPPs exhibited both outstanding interfacial activity and excellent antioxidant capacity, which were then used as Pickering emulsifiers to prepare antioxidant lipase-containing water-in-toluene Pickering emulsions through hand-shaking emulsification. The generated Pickering emulsions were subsequently applied as enzymatic microreactors for the hydrolysis of p-nitrophenyl butyrate. The catalytic performances of the fabricated microreactors were investigated. A strong positive correlation between the antioxidant capability of Pickering emulsions and the enhanced long-term catalytic performance of the enzymatic microreactors was revealed in this study.

研究了抗氧化皮克林乳剂的制备及其作为酯水解酶促反应平台的应用。采用一锅RAFT聚合诱导自组装策略，首次合成了具有均匀聚苯乙烯-马来酸酐核和混合聚低聚（乙二醇）甲基丙烯酸甲醚/聚苯乙烯壳的混合壳聚合物颗粒（MSPPs），并将其进一步用对氨基酚（PAP）进行了功能化。得到的功能化MSPPs具有良好的界面活性和抗氧化能力，然后将其作为Pickering乳化剂，通过手摇乳化制备了含抗氧化脂肪酶的甲苯包水Pickering乳剂。生成的皮克林乳剂随后作为酶促微反应器用于对硝基苯丁酸酯的水解。对所制备的微反应器的催化性能进行了研究。本研究揭示了皮克林乳液的抗氧化能力与酶促微反应器长期催化性能的增强之间存在很强的正相关关系。

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引用次数: 0

Advances and prospects in Alzheimer's disease diagnosis and treatment using MOFs and COFs: Mechanism and AI-assisted strategies MOFs和COFs在阿尔茨海默病诊断和治疗中的进展与展望：机制和人工智能辅助策略

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-12-11 DOI: 10.1016/j.reactfunctpolym.2025.106601

Fenglan Liang , Jie Li , Yingzi Feng , Yanlong Zhou , Liang Cao , Daniel Omoding , Madhav Raj Jayswal , Abhinav Kumar , Zhenjun Song , Jun Wang , Ying Pan

Alzheimer's disease (AD) is a common central nervous system neurodegenerative disorder, with its diagnosis and treatment posing significant challenges in the field of neurodegenerative diseases. With the rising global incidence of AD, there is growing interest in nanomaterials that enable precise and efficient diagnosis and treatment of the disease. In particular, the early diagnosis and targeted therapy of AD have long been hindered by issues such as low sensitivity in biomarker detection, poor blood-brain barrier (BBB) penetration, and the complexity of pathological mechanisms, making effective diagnosis and treatment difficult. Consequently, novel approaches are needed to address these challenges. Metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), owing to their high surface area, customizable structures, and excellent biocompatibility, demonstrate outstanding potential in ultra-sensitive biomarker detection, targeted drug delivery and controlled release, and AI-enhanced synergistic diagnosis and treatment for AD. This review focuses on the urgent needs in AD diagnosis and therapy, summarizing its pathogenesis, current diagnostic methods, and treatment status. It highlights the innovative roles of two porous nanomaterials, MOFs and COFs, across the entire process of “early diagnosis-targeted therapy-intelligent optimization” and elucidates their practical efficacy in AD management. Additionally, it explores the integration strategies of these materials with artificial intelligence (AI) and machine learning (ML) technologies. Finally, the review concludes by discussing the challenges and future prospects of MOFs and COFs as potential diagnostic and therapeutic systems for AD.

阿尔茨海默病（AD）是一种常见的中枢神经系统神经退行性疾病，其诊断和治疗是神经退行性疾病领域的重大挑战。随着全球阿尔茨海默病发病率的上升，人们对纳米材料的兴趣日益浓厚，纳米材料能够精确有效地诊断和治疗阿尔茨海默病。特别是AD的早期诊断和靶向治疗一直受到生物标志物检测灵敏度低、血脑屏障（BBB）渗透差、病理机制复杂等问题的阻碍，难以进行有效的诊断和治疗。因此，需要新的方法来应对这些挑战。金属有机框架（MOFs）和共价有机框架（COFs）由于其高表面积、可定制结构和优异的生物相容性，在超灵敏生物标志物检测、靶向给药和控释以及人工智能增强的AD协同诊断和治疗方面具有突出的潜力。本文就阿尔茨海默病诊断和治疗的迫切需求进行综述，综述其发病机制、目前的诊断方法和治疗现状。重点介绍了mof和COFs两种多孔纳米材料在“早期诊断-靶向治疗-智能优化”整个过程中的创新作用，并阐述了它们在AD治疗中的实际疗效。此外，它还探讨了这些材料与人工智能（AI）和机器学习（ML）技术的集成策略。最后，本文讨论了mof和COFs作为AD潜在诊断和治疗系统的挑战和未来前景。

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引用次数: 0

Fabrication of high-performance butadiene-styrene copolymer thermosets co-cured by reactive liquid crystalline poly(ester imide) 反应性液晶聚酰亚胺共固化制备高性能丁二烯-苯乙烯共聚物热固性聚合物

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106567

Xiangyi Li , Yuanqin Guo , Shumei Liu , Jianqing Zhao

Butadiene-styrene copolymer (BSC) resin is one of the hydrocarbon-based resins, which are regarded as promising candidates for high-frequency electronic packaging applications due to their inherently excellent dielectric properties. However, the insufficient mechanical and thermal performance of BSC, particularly the high coefficient of thermal expansion (CTE), adversely affects its reliability and dimensional stability, thereby limiting its potential and wider applications. In contrast, liquid crystalline poly(ester imide)s (LCPEIs) exhibit molecular orientation and possess a rigid, heat-resistant ester-imide backbone, resulting in excellent thermal, mechanical, and dielectric properties. Nevertheless, the high cost and complex synthesis of LCPEIs are considered major barriers to their widespread practical application. Although LCPEIs and BSC exhibit complementary properties, it is difficult to obtain high-performance blends through simple physical blending because of their inherent incompatibility. In order to solve this problem, a low-molecular-weight LCPEI bearing reactive vinyl groups was synthesized and used for co-curing butadiene-styrene copolymer (BSC) resin to obtain LCPEI/BSC thermosets. The incorporation of rigid segments and the formation of a denser cross-linked network endowed the LCPEI/BSC thermosets with markedly improved mechanical and thermal performance. At a loading of 4.8 wt% LCPEI, the resulting LCPEI-5/BSC thermoset exhibited a 33 % increase in Young's modulus and a 38 % increase in tensile strength, along with a 31 % reduction in CTE, compared to the BSC thermoset. This work demonstrates a feasible strategy to enhance the mechanical and thermal properties of LCPEI/BSC thermosets by co-curing the reaction of LCPEI for the potential application in advanced electronic packaging.

丁二烯-苯乙烯共聚物（BSC）树脂是一种碳氢化合物基树脂，由于其固有的优异介电性能，被认为是高频电子封装应用的有前途的候选者。然而，BSC的力学和热工性能不足，特别是热膨胀系数（CTE）过高，影响了其可靠性和尺寸稳定性，从而限制了其潜力和更广泛的应用。相比之下，液晶聚（酯亚胺）s （LCPEIs）表现出分子取向，并具有刚性，耐热的酯亚胺骨架，从而具有优异的热，机械和介电性能。然而，lcpei的高成本和复杂的合成被认为是其广泛实际应用的主要障碍。虽然lcpei和BSC表现出互补的性能，但由于它们固有的不相容性，很难通过简单的物理共混获得高性能共混物。为了解决这一问题，合成了一种含活性乙烯基的低分子量LCPEI，并将其用于共固化丁二烯-苯乙烯共聚物（BSC）树脂，得到LCPEI/BSC热固性树脂。刚性段的结合和更密集交联网络的形成赋予LCPEI/BSC热固性材料显著改善的机械和热性能。与BSC热固性材料相比，LCPEI-5/BSC热固性材料的杨氏模量增加了33%，抗拉强度增加了38%，CTE降低了31%。本研究为LCPEI/BSC热固性材料的力学性能和热性能的提高提供了一种可行的策略，并有望在先进的电子封装中得到应用。

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引用次数: 0

Efficient synthesis of PMMA in green solvents of choline chloride and glycerol-based deep eutectic solvents 在氯化胆碱和甘油基深共晶绿色溶剂中高效合成PMMA

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-28 DOI: 10.1016/j.reactfunctpolym.2025.106581

Rawda Maen Sunoqrot , Putri Nur Amelina Muhammad Shamsudin Ng , Amjad Abedelqader , Hesham Ali Metwally Ali El-enshasy , Mohamad Hamdi Zainal Abidin , Chen Qian , Naharullah Jamaluddin

Polymethyl methacrylate (PMMA) is a widely utilized thermoplastic in electronic applications, packaging, and biomedical devices. However, conventional PMMA is synthesized in volatile organic solvents such as toluene, significantly impacting the environment. This issue needs an urgent alternative to minimize the toxicity of organic solvents. Herein, this study reports the synthesis of PMMA in choline chloride and Glycerol-based DES (ChCl/Gly DES) via free radical polymerization (FRP), as there is significantly less work done using fashionable and environmentally friendly DESs in the synthesis of PMMA. This DES enhances the polymerization performance through stabilizing the monomer and initiator via hydrogen bonding. A 50:50 wt% ratio of MMA to DES with 0.5 wt% APS at 60 °C for 6 h yielded the highest monomer conversion of 99.5 %. A comprehensive characterization using ¹H NMR, FTIR, DSC, TGA, and GPC was conducted to evaluate the polymer performance. Results revealed a high molecular weight polymer of 246,518 g/mol with a notably high glass transition (T_g) of 123.2 °C. FTIR confirmed the hydrogen bonding formed between PMMA and DES, contributing to the high thermal stability and reduced brittleness. The involvement of DES lowered activation energy (Ea = 23.3 kJ/mol) compared to the conventional solvents, and exhibited a higher apparent rate constant (0.883 h⁻¹). These findings highlight ChCl/Gly DES as a green alternative to organic solvents and also its capability in producing an efficient PMMA-DES.

聚甲基丙烯酸甲酯（PMMA）是一种广泛应用于电子应用、包装和生物医学设备的热塑性塑料。然而，传统的PMMA是在甲苯等挥发性有机溶剂中合成的，对环境影响很大。这个问题迫切需要一个替代方案，以尽量减少有机溶剂的毒性。在此，本研究报告了在氯化胆碱和甘油基DES （ChCl/Gly DES）中通过自由基聚合（FRP）合成PMMA，因为使用时尚且环保的DES合成PMMA的工作要少得多。该DES通过氢键稳定单体和引发剂，提高了聚合性能。MMA与DES质量比为50:50，APS质量比为0.5 wt%，温度为60℃，反应时间为6 h，单体转化率最高，为99.5%。采用1H NMR、FTIR、DSC、TGA、GPC等手段对聚合物进行了综合表征。结果表明，聚合物的分子量为246,518 g/mol，玻璃化转变（Tg）温度高达123.2℃。FTIR证实了PMMA和DES之间形成的氢键，有助于高热稳定性和降低脆性。与传统溶剂相比，DES的加入降低了反应的活化能（Ea = 23.3 kJ/mol），并表现出较高的表观速率常数（0.883 h−1）。这些发现突出了ChCl/Gly DES作为有机溶剂的绿色替代品，以及它在生产高效PMMA-DES方面的能力。

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引用次数: 0

A pH-responsive hydrogel formed by chitosan and protocatechualdehyde via Schiff base for antioxidant and antibacterial application 壳聚糖与原儿茶醛经席夫碱形成的ph响应型水凝胶，具有抗氧化和抗菌作用

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-17 DOI: 10.1016/j.reactfunctpolym.2025.106561

Tongtong Zhang, Yawei Chen, Yiting Cao, Jindie Yuan, Xianjun Tang, Huiyun Zhou

To address the global challenge of antibiotic overuse, alternative strategies including inorganic nanoparticles, photothermal therapy, and photodynamic therapy have been developed in recent years. However, their clinical translation has been hindered by complicated manufacturing processes and high production costs. This study successfully developed a pH-responsive chitosan-based hydrogel via an environmentally friendly Schiff base reaction, leveraging the dual inherent antibacterial and antioxidant properties of both chitosan (CS) and protocatechualdehyde (PA). The chitosan-protocatechualdehyde (CS-PA) hydrogel exhibited superior swelling capacity, excellent injectability, and potent antioxidant and antibacterial activities. Antibacterial experiments demonstrated that the CS-PA hydrogel significantly inhibited the growth of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), with the CS-PA200 hydrogel achieving complete inhibition of both bacteria within 24 h. These results establish the CS-PA hydrogel as a clinically promising, antibiotic-free platform for combating drug-resistant infections while promoting wound regeneration.

为了解决抗生素过度使用的全球性挑战，近年来发展了包括无机纳米颗粒、光热疗法和光动力疗法在内的替代策略。然而，它们的临床转化一直受到复杂的制造工艺和高生产成本的阻碍。本研究利用壳聚糖（CS）和原儿茶醛（PA）的抗菌和抗氧化双重特性，通过环境友好的希夫碱反应成功制备了ph响应型壳聚糖水凝胶。壳聚糖-原儿茶醛（CS-PA）水凝胶具有良好的溶胀性、注射性和抗氧化、抗菌活性。抗菌实验表明，CS-PA水凝胶可显著抑制大肠杆菌（E. coli）和金黄色葡萄球菌（S. aureus）的生长，其中CS-PA200水凝胶可在24 h内完全抑制这两种细菌。这些结果表明CS-PA水凝胶是一种具有临床前景的无抗生素平台，可用于对抗耐药感染，同时促进伤口再生。

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引用次数: 0

Sulfated polysaccharides and their potential applications as drug carrier systems: A review 硫酸酸化多糖及其作为药物载体体系的研究进展

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106576

Sakthivel Ragul, Sreeram Sneha, Shivanshu Nautiyal, Akshad Balde, Rasool Abdul Nazeer

Sulfated polysaccharides are either naturally occurring biopolymers derived primarily from marine algae and some terrestrial sources or synthesized chemically. These macromolecules have gained increasing attention in biomedical science due to their unique structural properties, biocompatibility, biodegradability, and diverse biological activities. In particular, their application as drug carriers in various delivery systems has opened new avenues in targeted and sustained drug release. Owing to the presence of sulfate groups, these polysaccharides exhibit strong interactions with drugs, proteins, and cell membranes, enabling enhanced bioavailability, mucoadhesive properties, and site-specific delivery. Their therapeutic roles span across wound healing, anti-inflammatory action, cancer therapy, and regenerative medicine. The present work provides a comprehensive analysis of the major types of sulfated polysaccharides, including thiolated chitosan, carrageenan, chondroitin sulfate, alginate sulfate, ulvan, and fucoidans. Each polysaccharide is discussed with respect to its structural characteristics, drug-binding potential, and utility in various delivery platforms such as nanoparticles, hydrogels, micelles, and scaffolds. The discussion further emphasizes commercially available formulations, outlining their advantages in enhancing drug stability, prolonging retention time, and improving therapeutic outcomes. Despite their promising biomedical properties, most applications of sulfated polysaccharides remain confined to in vitro studies, with limited in vivo and clinical data. Thus, further research is required to explore their pharmacokinetics, safety, and efficacy in biological systems. The primary focus of this review is to consolidate current knowledge on sulfated polysaccharides as drug carriers, evaluate their biological significance, and identify gaps and future directions for their development in advanced drug delivery systems.

硫酸酸化多糖是一种天然存在的生物聚合物，主要来源于海洋藻类和一些陆地来源，或者是化学合成的。这些大分子由于其独特的结构特性、生物相容性、生物可降解性和多样的生物活性，在生物医学领域受到越来越多的关注。特别是，它们作为药物载体在各种给药系统中的应用开辟了靶向和持续药物释放的新途径。由于硫酸盐基团的存在，这些多糖与药物、蛋白质和细胞膜表现出强烈的相互作用，从而增强了生物利用度、黏附性能和位点特异性递送。它们的治疗作用跨越伤口愈合、抗炎作用、癌症治疗和再生医学。本文对巯基壳聚糖、角叉菜胶、硫酸软骨素、硫酸海藻酸盐、藻酸盐和岩藻酸胶等主要类型的硫酸酸化多糖进行了综合分析。讨论了每种多糖的结构特征、药物结合潜力以及在各种递送平台（如纳米颗粒、水凝胶、胶束和支架）中的用途。讨论进一步强调了市售配方，概述了它们在增强药物稳定性、延长保留时间和改善治疗结果方面的优势。尽管硫酸多糖具有很好的生物医学特性，但大多数硫酸多糖的应用仍然局限于体外研究，体内和临床数据有限。因此，需要进一步研究其在生物系统中的药代动力学、安全性和有效性。本综述的主要重点是巩固目前关于硫酸多糖作为药物载体的知识，评估其生物学意义，并确定其在先进药物传递系统中的发展差距和未来发展方向。

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引用次数: 0

Deodorizing mechanism of adhesive foam sheet containing cellulose nanofibers against hydrogen sulfide gas 含纤维素纳米纤维的粘性泡沫板对硫化氢气体的除臭机理

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-25 DOI: 10.1016/j.reactfunctpolym.2025.106579

Atsushi Sone , Akira Isogai

An aqueous dispersion of TEMPO-oxidized cellulose nanofibers with copper carboxylate groups (TOCN-Cu) (TEMPO: 2,2,6,6-tetramethylpiperidine-1-oxyl radical) and a rubber latex were mixed. This mixture was then coated onto an opaque polypropylene (PP) or transparent poly(ethylene terephthalate) (PET) film and thermally dried to prepare a TOCN-Cu-containing foam rubber layer on the PP or PET film. The foam rubber side of each sheet was adhered to a glass plate using pressure, which was then placed in a test bag. The adsorption of odorous H₂S on each glass plate/TOCN-Cu-containing foam rubber/film was evaluated by determining the H₂S gas concentration in the test bag against the treatment time, which had a length of up to 317 days. The H₂S gas penetrated from the edge of each composite sheet and reached the interior, forming CuS, which was homogeneously distributed throughout the foam rubber layer through its continuously connected pore. The TOCN-Cu was primarily present near the rubber/air interface in the foam layer of the composite adhesive sheet, resulting in excellent deodorizing functions. However, H₂S gas was mostly adsorbed to the TOCN-Cu-containing foam rubber sheets by physical interactions. This is because the S/Cu molar ratio for a representative H₂S-adsorbed sheet was calculated to be ∼2080.

将含有羧酸铜基团（TOCN-Cu）（TEMPO: 2,2,6,6-四甲基哌啶-1-氧基）的TEMPO氧化纤维素纳米纤维与胶乳混合。然后将这种混合物涂覆在不透明的聚丙烯（PP）或透明的聚对苯二甲酸乙酯（PET）薄膜上，并进行热干燥，在PP或PET薄膜上制备含tocn - cu的泡沫橡胶层。每张纸的泡沫橡胶一面用压力粘在玻璃板上，然后将玻璃板放入测试袋中。通过测定测试袋中H2S气体浓度与处理时间的关系来评估每个玻璃板/含tocn - cu泡沫橡胶/膜对恶臭H2S的吸附，处理时间长达317天。H2S气体从每片复合材料的边缘渗透到内部，形成cu， cu通过连续连接的孔均匀分布在泡沫橡胶层中。TOCN-Cu主要存在于复合胶粘剂泡沫层的橡胶/空气界面附近，具有优异的除臭性能。然而，H2S气体主要通过物理相互作用吸附在含tocn - cu泡沫橡胶片上。这是因为计算出具有代表性的硫化氢吸附片的S/Cu摩尔比为~ 2080。

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引用次数: 0

Synthesis of polyalumino-titanocarbonsilane from a commercial polycarbosilane 以商品聚碳硅烷为原料合成聚铝钛碳硅烷

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-12-06 DOI: 10.1016/j.reactfunctpolym.2025.106600

Xiaohong Li , Cai Ye , Jianjun Chen , Zahoor Ahmad

In this work, a novel polyalumino-titanocarbonsilane (PATCS) was synthesized by the reaction of commercial spinning grade polycarbosilane (PCS) with aluminum acetylacetonate (Al(AcAc)₃) and titanocene dichloride (Ti(C₅H₅)₂Cl₂). A dense SiC ceramic fiber was obtained by melt-spinning, thermal oxidation curing in relatively short curing time (∼ 1 h) at 473 K, and pyrolysis of the PATCS. To reveal the thermal polymerization mechanisms of PATCS, the as-synthesized PATCS were investigated by FT-IR, XPS, GPC, ²⁹Si NMR, TG, rotary rheometer, metaloscope. The results showed that the PATCS was consisted of SiH bonds, Si-CH₃ groups, Si-CH₂-Si groups, and a small amount of SiO bonds and CC bonds. The polymerization mechanism of PATCS involves the reactions of SiH bonds in polycarbosilane (PCS) with TiCl, CC, and Al-O-R groups to form SiTi, Si-C-C, Si-C-Ti, and Si-O-Al bonds. The TGA results showed that mass residual rate under high temperature had an obviously increase with adding Al(AcAc)₃ and Ti(C₅H₅)₂Cl₂. The PCS, PACS and PATCS were pseudoplastic fluid and their viscosity decreased with rising temperature. Suitable melt-spinning temperature range of the PATCS-1 was 553–593 K. A continuous PATCS-1 fiber with a diameter of 29.33 ± 2.99 μm was obtained by the melt-spinning process at 553 K. The Ti element and CC bonds in PATCS might accelerate the curing of the PATCS fibers in air. The study provides a facile synthetic method for preparing a novel precursor polymer, which serves as a precursor for high-performance double-metal heterogeneous element-containing SiC ceramic fiber and can be efficiently cured in air.

本文以工业纺丝级聚碳硅烷（PCS）为原料，与乙酰丙酮铝（Al(AcAc)3）和二氯化茂钛（Ti(C5H5)2Cl2）反应合成了新型聚铝-钛碳硅烷（PATCS）。通过熔融纺丝、473 K下较短的固化时间（~ 1 h）的热氧化固化和PATCS的热解，得到了致密的SiC陶瓷纤维。为了揭示PATCS的热聚合机理，采用FT-IR、XPS、GPC、29Si NMR、TG、旋转流变仪、金相显微镜对合成的PATCS进行了表征。结果表明，PATCS由SiH键、Si-CH3基团、Si-CH2-Si基团以及少量的SiO键和CC键组成。聚碳硅烷（PCS）中的SiH键与TiCl、CC和Al-O-R基团反应形成SiTi、Si-C-C、Si-C-Ti和Si-O-Al键。TGA结果表明，加入Al(AcAc)3和Ti(C5H5)2Cl2后，高温下的质量残留率明显提高。PCS、PACS和PATCS均为假塑性流体，其粘度随温度升高而降低。PATCS-1的适宜熔融纺丝温度范围为553 ~ 593 K。在553 K温度下，采用熔融纺丝工艺获得了直径为29.33±2.99 μm的连续型PATCS-1纤维。PATCS中的Ti元素和CC键可以加速PATCS纤维在空气中的固化。本研究为制备新型前驱体聚合物提供了一种简便的合成方法，该前驱体聚合物可作为高性能双金属非均相元素SiC陶瓷纤维的前驱体，并可在空气中高效固化。

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引用次数: 0

High-elastic, anti-shrinkage poly(butylene adipate-co-terephthalate) foams prepared by ultraviolet-induced chain extension strategy 紫外诱导扩链法制备高弹性抗收缩聚己二酸丁二酯泡沫

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2026-02-01 Epub Date: 2025-11-19 DOI: 10.1016/j.reactfunctpolym.2025.106556

Fu-Lu Chang , Lun Chen , Zi-Yang Hua , Sheng Wang , Xiao-Chun Yin , Xian-Wu Cao , Guang-Jian He

Biodegradable polybutylene adipate-terephthalate (PBAT) foams have garnered significant attention as environmental and energy concerns escalate. However, PBAT foams produced via supercritical carbon dioxide (scCO₂) foaming often suffer from severe shrinkage, limiting their practical applications. Herein, we developed a novel strategy to address this issue by fabricating long chain branched PBAT through UV-induced reactive extrusion. Glycidyl methacrylate (GMA) and trimethylolpropane tri-acrylate (TMPTA) were introduced to induce branching via epoxy groups and carbon‑carbon double bonds during PBAT processing, respectively. The formation of long chain branched structures was confirmed through rheological analysis and Fourier transform infrared (FTIR) spectroscopy. The incorporation of branched structures significantly enhanced the melt strength and rheological properties of PBAT, thereby mitigating foam shrinkage. The modified PBAT foams exhibited an impressive expansion ratio of 10.4 without shrinkage, while maintaining a uniform cell structure with an average size below 40 μm under optimized conditions (15 MPa, 100 °C). Ultraviolet-induced chain extension strategy plays a pivotal role in enhancing CO₂ foamability and dimensional stability, offering a widely applicable anti-shrinkage strategies in biodegradable polymers.

随着环境和能源问题的升级，可生物降解的聚己二酸丁二酯（PBAT）泡沫已经引起了人们的极大关注。然而，通过超临界二氧化碳（scCO2）发泡生产的PBAT泡沫经常遭受严重的收缩，限制了其实际应用。在此，我们开发了一种新的策略来解决这一问题，即通过紫外线诱导反应挤出制备长链支链PBAT。甲基丙烯酸缩水甘油酯（GMA）和三甲基丙烷三丙烯酸酯（TMPTA）分别通过环氧基和碳碳双键诱导支化。通过流变学分析和傅里叶变换红外光谱（FTIR）证实了长链分支结构的形成。分支结构的加入显著提高了PBAT的熔体强度和流变性能，从而减轻了泡沫收缩。在优化条件（15 MPa, 100℃）下，改性PBAT泡沫的膨胀率为10.4，且无收缩，同时保持均匀的孔结构，平均尺寸小于40 μm。紫外线诱导的链延伸策略在提高CO₂的发泡性和尺寸稳定性方面起着关键作用，为生物可降解聚合物的抗收缩策略提供了广泛应用的方法。

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引用次数: 0