Improving Durability of Silicone Rubber Dielectric Elastomer Composite by Constructing Covalent-Bonds Between the Surface-Modified Silica and Matrix

IF 3.1 3区化学 Q2 POLYMER SCIENCE

Journal of Applied Polymer Science Pub Date : 2026-10-01 Epub Date: 2026-08-23 DOI:10.1002/app.71400

Kexin Bo, Huiying Li, Yuhong Ma, Wei Zou, Hong Wang, Like Sun, Chen Zhang

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引用次数: 0

Abstract

The inherent viscoelastic behaviors of dielectric elastomers (DEs), such as creep and hysteresis, are important for their long-term service stability and energy efficiency in cyclic applications. In this work, a constrained interface between dielectric filler and silicone rubber matrix was constructed by modifying nano-silica surface with vinylmethyl dimethoxysilane (VMDMS). By the co-crosslinking reaction among the vinyl groups of modified nano-silica and polymethylvinylsiloxane (PMVS) matrix, the polymer chain mobility was restricted and the filler dispersion was improved. The as-obtained VMDMS@SiO₂/PMVS nanocomposites exhibited remarkably enhanced compressive creep as low as 0.25%, which was 86% lower than that of SiO₂/PMVS nanocomposite. Furthermore, the constrained interface also provided excellent dielectric stability after creep and minimized hysteresis loss during cyclic loading. This study presents an effective interfacial design strategy for developing durable and reliable DEs with suppressed viscoelasticity, which has the potential for applications in soft robotics and energy harvesting.

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通过构建表面改性二氧化硅与基体之间的共价键提高硅橡胶介电弹性体复合材料的耐久性

介电弹性体（DEs）固有的粘弹性行为，如蠕变和迟滞，对其在循环应用中的长期使用稳定性和能效至关重要。本文采用乙烯基甲基二甲氧基硅烷（VMDMS）修饰纳米二氧化硅表面，构建了介电填料与硅橡胶基体之间的约束界面。通过改性纳米二氧化硅与聚甲基乙烯硅氧烷（PMVS）基体的乙烯基共交联反应，限制了聚合物链的迁移率，提高了填料的分散性。所得VMDMS@SiO2/PMVS纳米复合材料的压缩蠕变显著增强，达到0.25%，比SiO2/PMVS纳米复合材料低86%。此外，约束界面还提供了优异的蠕变后介电稳定性和最小的循环加载迟滞损失。该研究提出了一种有效的界面设计策略，用于开发耐用可靠的具有抑制粘弹性的DEs，在软机器人和能量收集方面具有潜在的应用前景。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Applied Polymer Science 化学-高分子科学

CiteScore

5.70

自引率

10.00%

发文量

1280

审稿时长

2.7 months

期刊介绍： The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.