Reactive & Functional Polymers最新文献_第6页

Halogen and phosphorus-free sustainable bio-silica reinforced imidazole-based Polybenzoxazine/epoxy hybrid composites for low-dielectric and flame-retardant applications 无卤无磷可持续生物硅增强咪唑基聚苯并恶嗪/环氧杂化复合材料，用于低介电和阻燃应用

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-27 DOI: 10.1016/j.reactfunctpolym.2025.106580

Selvi M , Devaraju S , Alagar M

In pursuit of environmentally friendly materials for next-generation micro-electronics insulation applications, thermosetting hybrid networks were developed by integrating imidazole-cored benzoxazine (IMP-BZ) with fossil-based bisphenol-F epoxy (BFE) and bio-derived card-bisphenol epoxy (CBE) resins, reinforced with GPTMS-functionalized bio-silica (BS). The IMP-BZ monomer, containing a rigid, nitrogen-rich heterocyclic core, enhanced thermal stability and reduced dielectric response by increasing cross-link density and restricting molecular mobility. The incorporation of 20 wt% bio-silica further improved thermal endurance, flame retardant behaviour, and dielectric characteristics. The BFE-based hybrid (IMP-BZ/BFE) exhibited a decomposition temperature above 370 °C and a limiting oxygen index (LOI) exceeding 40 %, reflecting the influence of its aromatic backbone, whereas the CBE-based system offered a sustainable alternative with greater flexibility and improved char retention. Dielectric measurements indicated a decrease in dielectric constant to 2.80 and 2.63 for the IMP-BZ/BFE and IMP-BZ/CBE hybrids, respectively, while dielectric losses decreased from 0.0524 to 0.0135 and from 0.0415 to 0.0069 upon incorporation of bio-silica. These changes were attributed to the synergistic effects of the imidazole–benzoxazine core, low-polar silica domains, and the formation of a Si–O–Si network that limits dipole orientation and segmental motion. This study demonstrates the development of phosphorus- and halogen-free hybrid composites combining flame resistance, thermal stability, and low dielectric behaviour, suitable for advanced microelectronics insulation, and structural applications emphasizing both performance and sustainability.

为了追求下一代微电子绝缘应用的环保材料，热固性混合网络是通过将咪唑核苯并杂嗪（IMP-BZ）与化石基双酚-f环氧树脂（BFE）和生物衍生卡双酚环氧树脂（CBE）结合起来开发的，并用gptms功能化的生物二氧化硅（BS）增强。IMP-BZ单体含有刚性的富氮杂环核心，通过增加交联密度和限制分子迁移率来增强热稳定性和降低介电响应。20%生物二氧化硅的掺入进一步提高了耐热性、阻燃性能和介电特性。基于BFE的杂化体系（impp - bz /BFE）的分解温度在370℃以上，极限氧指数（LOI）超过40%，反映了其芳香骨架的影响，而基于cbe的体系具有更大的灵活性和更高的炭保留率。介电测量表明，掺入生物硅后，IMP-BZ/BFE和IMP-BZ/CBE杂化材料的介电常数分别降至2.80和2.63，介电损耗分别从0.0524和0.0415降至0.0135和0.0069。这些变化归因于咪唑-苯并恶嗪核心、低极性二氧化硅畴以及Si-O-Si网络的协同作用，该网络限制了偶极子取向和节段运动。这项研究展示了无磷和无卤混合复合材料的发展，结合了阻燃性、热稳定性和低介电性能，适用于先进的微电子绝缘，以及强调性能和可持续性的结构应用。

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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 : 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

Sebacic acid as a renewable monomer for biodegradable polyesters: A review 癸二酸作为生物可降解聚酯再生单体的研究进展

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-23 DOI: 10.1016/j.reactfunctpolym.2025.106577

Hyunho Jang , Gunhee Park , Sangwoo Kwon , Su-il Park

Sebacic acid, a 10‑carbon aliphatic dicarboxylic acid, can be produced on an industrial scale (∼150,000 tons per year) from biomass-derived oils such as castor oil. Environmental concerns have heightened the need for renewable resources in the chemical industry, prompting the widespread use of sebacic acid in the chemical, pharmaceutical, and cosmetic industries. Notably, sebacic acid can also be used as a building block in biodegradable polyesters, considering its long octamethylene segment imparts excellent flexibility and degradability, while its nontoxicity broadens its application scope. Consequently, sebacic acid is increasingly used in developing renewable and biodegradable polyesters with accelerated degradation performance. This review discusses recent advancements in sebacic-acid-based polyesters, focusing on their synthesis and characterization, and outlines future research perspectives in the field.

癸二酸是一种10碳脂族二羧酸，可从蓖麻油等生物质衍生油中以工业规模（每年约15万吨）生产。环境问题提高了化学工业对可再生资源的需求，促使己二酸在化学、制药和化妆品工业中广泛使用。值得注意的是，己二酸也可以作为生物降解聚酯的组成部分，因为它的长八亚甲基段赋予了它良好的柔韧性和可降解性，而它的无毒性扩大了它的应用范围。因此，己二酸越来越多地用于开发具有加速降解性能的可再生和可生物降解聚酯。本文综述了近年来癸二酸基聚酯的研究进展，重点介绍了癸二酸基聚酯的合成和表征，并展望了该领域未来的研究方向。

引用次数: 0

Chitosan-based delivery systems for ocular therapeutics: Advances, challenges, and future perspectives 基于壳聚糖的眼部治疗递送系统：进展、挑战和未来展望

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106575

Ritamay Sau , Garima , Ankur , Gurpreet Kaur , Sachin Kumar Singh , Meenakshi Dhanawat , Neeraj Mittal

Ocular drug distribution has consistently presented issues for ophthalmologists as well as specialists, due to distinct pharmacological and anatomical barriers. These barriers eliminate the accumulation of foreign substances inside the body and may inhibit the active absorption of therapeutic substances. Thus, the design of an appropriate delivery system must integrate features that tend to enhance the bioavailability of the drug and controlled medication release towards the target area, thereby overcoming numerous ocular barriers. In recent years, chitosan, a naturally occurring polymer, has been mucoadhesive, biologically compatible, and biodegradable, making it the subject of extensive investigation. It has special physicochemical qualities, including easy chemical modification, pH-sensitive solubility, and improved permeability capabilities. These characteristics render it an optimal material for nanoparticles, hydrogels, gels, in situ, and ocular drug delivery inserts development. This review examines the obstacles related to ocular drug delivery and recent progress for chitosan-based ocular systems formulation designed to enhance drug retention, corneal permeability, and prolonged drug release. Moreover, it highlights the main obstacles to clinical translation and provides prospects for their growth as efficient, patient-friendly platforms for the therapy of ocular diseases.

由于不同的药理学和解剖学障碍，眼部药物分布一直是眼科医生和专家面临的问题。这些屏障消除了体内外来物质的积累，并可能抑制治疗物质的主动吸收。因此，一种合适的给药系统的设计必须整合那些倾向于提高药物的生物利用度和控制药物向靶标区域释放的特征，从而克服许多视觉障碍。近年来，壳聚糖作为一种天然聚合物，因其具有良好的粘附性、生物相容性和可生物降解性，成为人们广泛研究的对象。它具有特殊的物理化学性质，包括易于化学改性，ph敏感的溶解度和提高的渗透性。这些特性使其成为纳米颗粒、水凝胶、凝胶、原位和眼部药物输送植入物开发的最佳材料。本文综述了以壳聚糖为基础的眼部药物传递的障碍和最新进展，旨在提高药物潴留，角膜渗透性和延长药物释放。此外，它强调了临床翻译的主要障碍，并提供了它们作为有效的、对患者友好的眼科疾病治疗平台的发展前景。

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引用次数: 0

Poly(aniline-co-pyrrole)/SnO2 nanocomposites: Innovative electrode materials for enhanced capacitance for symmetric supercapacitor applications 聚（苯胺-共吡咯）/SnO2纳米复合材料：用于增强对称超级电容器应用电容的创新电极材料

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106573

Manikant , Srikanta Moharana , Alekha Kumar Sutar , Tungabidya Maharana

Polypyrrole (PPy) and polyaniline (PANI) are two of the most significantly used conducting polymers in supercapacitor applications. The chemical oxidative polymerization in-situ method is applied to synthesize the poly(aniline-co-pyrrole)/SnO₂ (PAPSn) nanocomposites. Three different batches of the PAPSn nanocomposites (NCs) were produced by combining the PPy and PANI with different amounts of SnO₂. The electrochemical properties of the synthesized PAPSn NC materials were thoroughly evaluated using a potentiostat in 1 M H₂SO₄ solution. The PAPSn10 electrode exhibited improved electrochemical performance and achieved a remarkable specific capacitance (C_sp) of 670 F g⁻¹ at 1 A g⁻¹. The PAPSn10 symmetric supercapacitor (SSC) device exhibited a C_sp of 252 F g⁻¹ at 1 A g⁻¹. It achieved a remarkable power and energy densities of 696 W kg⁻¹ and 35 Wh kg⁻¹, respectively. The SSC device retained 85 % of its initial capacitance even after 3000 charge-discharge cycles at a current density of 4 A g⁻¹. This signifies the exceptional cycling stability of the PAPSn10 SSC device. These findings emphasized the potential of PAPSn10 NCs as a promising candidate in energy storage applications.

聚吡咯（PPy）和聚苯胺（PANI）是超级电容器中应用最广泛的两种导电聚合物。采用原位化学氧化聚合法制备了聚苯胺-共吡咯/SnO2 （PAPSn）纳米复合材料。将聚吡啶和聚苯胺与不同数量的SnO2相结合，制备了3批不同批次的PAPSn纳米复合材料。利用恒电位器在1 M H2SO4溶液中对合成的PAPSn NC材料的电化学性能进行了全面评价。PAPSn10电极的电化学性能得到了改善，在1ag−1下的比电容（Csp）达到670 F g−1。该PAPSn10对称超级电容器（SSC）器件在1ag−1时的Csp值为252fg−1。它的功率和能量密度分别为696 W kg - 1和35 Wh kg - 1。在4 a g−1的电流密度下，即使在3000次充放电循环后，SSC器件仍保持了85%的初始电容。这表明PAPSn10 SSC器件具有出色的循环稳定性。这些发现强调了PAPSn10纳米碳纳米管在储能应用中的潜力。

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引用次数: 0

The hydrazone-linked and imine-linked Tp covalent organic frameworks for fluorescence sensing iodide ions and nitrophenols 用于荧光感应碘离子和硝基酚的腙连接和亚胺连接的Tp共价有机框架

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106572

Qi Peng

One of the emerging problems in fluorescence sensing is the development of high-performance sensors with high abundant active sites to achieve rapid and strong interaction with analytes such as iodide ions, 2,4-dinitrophenol, and 2,4,6-trinitrophenol. In this work, we prepared hydrazone-linked COF (TpTHTA) and one imine-linked COF (TpMA) through the condensation of 2,4,6- tris(hydrazino)-1,3,5-triazine and melamine with 2,4,6-tris(p-formylphenoxy)- 1,3,5-triazine. Although the specific surface area and pore volume of TpTHTA (2148 m² g⁻¹ and 1.0997 cm³ g⁻¹) are lower than those of TpMA (2403 m² g⁻¹ and 1.3325 cm³ g⁻¹), the fluorescence sensing sensitivities of TpTHTA to I⁻ and DNP (K_SV: 1.76 × 10⁴ and 2.14 × 10⁴ L⁻¹ mol) are higher than that of TpMA (K_SV: 1.61 × 10⁴ and 6.78 × 10³ L⁻¹ mol), which is because the active sites of TpTHTA are more than that of TpMA. The mechanisms of iodine ion quenching fluorescence of TpTHTA and TpMA are heavy atom effect and energy transfer mechanism, while the mechanisms of DNP and TNP quenching fluorescence of TpTHTA and TpMA are electron transfer mechanism, energy transfer mechanism and basic hydrogen bond interaction. TpTHTA and TpMA can detect iodide ions in wheat flour and DNP and TNP in river sand with satisfactory recovery and low relative standard deviation. Moreover, TpTHTA and TpMA were characterized by XRD, TEM, BET, FE-SEM, TGA, FT-IR, and solid state ¹³C NMR.

荧光传感的新问题之一是开发具有高活性位点的高性能传感器，以实现与碘离子、2,4-二硝基苯酚和2,4,6-三硝基苯酚等分析物的快速强相互作用。本研究通过2,4,6-三（对甲氧基苯氧基）-1,3,5-三嗪与2,4,6-三（对甲氧基苯氧基）-1,3,5-三嗪的缩合反应，制备了腙连接COF （TpTHTA）和一亚胺连接COF （TpMA）。虽然TpTHTA的比表面积（2148 m2 g−1）和孔体积（1.0997 cm3 g−1）低于TpMA (2403 m2 g−1和1.3325 cm3 g−1)，但TpTHTA对I−和DNP （KSV: 1.76 × 104和2.14 × 104 L−1 mol）的荧光传感灵敏度高于TpMA (KSV: 1.61 × 104和6.78 × 103 L−1 mol)，这是因为TpTHTA的活性位点比TpMA多。TpTHTA和TpMA的碘离子猝灭荧光机制为重原子效应和能量转移机制，TpTHTA和TpMA的DNP和TNP猝灭荧光机制为电子转移机制、能量转移机制和碱性氢键相互作用机制。TpTHTA和TpMA可以检测小麦粉中的碘离子和河沙中的DNP和TNP，回收率满意，相对标准偏差低。采用XRD、TEM、BET、FE-SEM、TGA、FT-IR和固态13C NMR对TpTHTA和TpMA进行了表征。

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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 : 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

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 : 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

Construction of quaternized chitosan/oxidized dextran photothermal antibacterial self-healing hydrogels and their application in local drug delivery 季铵化壳聚糖/氧化葡聚糖光热抗菌自愈水凝胶的构建及其在局部给药中的应用

IF 5.1 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers

Pub Date : 2025-11-22 DOI: 10.1016/j.reactfunctpolym.2025.106571

Qiuyan Ye , Liangdong Jiang , Yao Yuan , Yukun Liu , Lemin Chen , Menglin Lu , Yanling Zhou , Junyan Zhan , Linbin Jiang

Herein, an innovative hydrogel system (QOPC) is presented that combats bacterial infections through a synergistic photothermal approach, eliminating the need for antibiotics. The hydrogel was synthesized via Schiff base cross-linking between quaternized chitosan (QCS), polyethyleneimine (PEI), and oxidized dextran (ODex), incorporating copper sulfide nanoparticles (CuS NPs) for enhanced photothermal properties. The resulting material exhibited exceptional mechanical strength, favorable biocompatibility, swelling capacity, and dynamic viscoelastic properties, along with self-healing and injectable characteristics. Notably, the composite demonstrated remarkable antibacterial efficacy, achieving complete eradication of E. coli and over 93 % elimination of S. aureus under near-infrared irradiation. The hydrogel also successfully encapsulated methylene blue (MB), showing pH-responsive release kinetics ranging from 49 to 99 h across physiological pH conditions. Leveraging the collaborative therapeutic benefits of QOP and CuS NPs, the MB-encapsulated QOPC hydrogels demonstrated enhanced antimicrobial potency, yielding 100 % inhibition rates against both bacterial strains, presenting a promising alternative to conventional antibiotic treatments.

本文提出了一种创新的水凝胶系统（QOPC），通过协同光热方法对抗细菌感染，从而消除了对抗生素的需求。以季铵化壳聚糖（QCS）、聚乙烯亚胺（PEI）和氧化葡聚糖（ODex）为原料，通过席夫碱交联合成水凝胶，并加入硫化铜纳米粒子（CuS NPs）增强光热性能。所得材料具有优异的机械强度、良好的生物相容性、膨胀能力和动态粘弹性，以及自愈和可注射特性。值得注意的是，该复合材料显示出显著的抗菌效果，在近红外照射下，大肠杆菌被完全根除，金黄色葡萄球菌被消除93%以上。该水凝胶还成功封装了亚甲基蓝（MB），在生理pH条件下，pH响应释放动力学范围为49至99 h。利用QOP和CuS NPs的协同治疗优势，mb封装的QOPC水凝胶显示出增强的抗菌效力，对两种细菌菌株的抑制率均为100%，是传统抗生素治疗的有希望的替代方案。

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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 : 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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