Melt Rheology of Poly(L-lactic Acid) Hybrids with Mesoporous Hollow Silica Nanospheres

IF 5 3区工程技术 Q2 ENGINEERING, ENVIRONMENTAL

Journal of Polymers and the Environment Pub Date : 2025-05-30 DOI:10.1007/s10924-025-03593-6

Shizhao Wang, Yong Ku Kwon

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Abstract

A positively charged poly(styrene-co-butyl acrylate-co-2-methacryloxyethyltrimethyl ammonium chloride) (PSBM) copolymer was synthesized as a thermal sacrificial core-template via soap-free emulsion copolymerization. With cetyltrimethylammonium bromide (CTAB), PSBM@surfactant/silica core-shell nanocomposites with uniform shell thickness formed through charge density matching between tetraethyl orthosilicate (TEOS) and self-assembly. Thermal decomposition resulted in mesoporous hollow silica nanospheres. These nanospheres were functionalized using coupling agents and incorporated into poly(L-lactic acid) (PLA) matrices, significantly enhancing the mechanical and rheological properties of PLA. Compared to pure PLA, the composites exhibited improved Young’s modulus, tensile strength, and toughness. Rheological analysis confirmed the formation of a stable filler network, with increased storage modulus and relaxation time. The Carreau-Yasuda model confirmed the absence of phase separation and the formation of a stable 3D network.

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聚l -乳酸与介孔中空二氧化硅纳米球杂化物的熔体流变性研究

采用无皂乳液共聚的方法合成了带正电荷的聚苯乙烯-丙烯酸丁酯-co-2-甲基丙烯氧基乙基三甲基氯化铵（PSBM）共聚物。以十六烷基三甲基溴化铵（CTAB）为原料，通过正硅酸四乙酯（TEOS）的电荷密度匹配和自组装，形成了具有均匀壳厚的PSBM@surfactant/二氧化硅核壳纳米复合材料。热分解生成中空介孔二氧化硅纳米球。这些纳米球通过偶联剂被功能化并掺入聚乳酸（PLA）基质中，显著提高了PLA的力学和流变性能。与纯PLA相比，复合材料的杨氏模量、拉伸强度和韧性都有所提高。流变分析证实形成了稳定的填料网络，增加了存储模量和松弛时间。carau - yasuda模型证实了不存在相分离，并且形成了稳定的三维网络。

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来源期刊

Journal of Polymers and the Environment 工程技术-高分子科学

CiteScore

9.50

自引率

7.50%

发文量

297

审稿时长

9 months

期刊介绍： The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.