Improved electro-actuation of polydimethylsiloxane-based composite dielectric elastomer via constructing semi-interlocked dual-network

IF 4.1 2区 化学 Q2 POLYMER SCIENCE
Liming Jin , Chuying Zhang , Haotong Guo , Huiqin Wang , Jinbo Bai , Hang Zhao
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引用次数: 0

Abstract

Dielectric elastomer (DE) has a pivotal potential in various applications as a typical electro-active polymer. However, traditional DE materials often require high electric fields to achieve an excellent electro-actuated performance, which severely restricts their practical applicability. In this study, vinyl methyl silicone (VMQ) macromolecular chains are introduced as the highly-viscous plasticizer to reduce the elastic modulus of polydimethylsiloxane (PDMS)-based DE composites. The bisilane-modified TiO2 nanoparticles (mTO) that grafted by thiols and octadecane are incorporated to increase the dielectric constant of DE composites. The synergistic effects contributed by these components give rise to a notable improvement in the electro-actuated performance of DE composites. Moreover, the thiol-ene click chemical reaction between the functional groups on mTO and VMQ makes the formation of a semi-interlocked cross-linked network structure within the PDMS-based elastomers. This network effectively mitigates the issue of plasticizer leaching during the long-term utilization of DE composites. The PDMS-based composite comprising 10 wt% mTO and 20 wt% VMQ achieves a remarkable electro-actuated strain of 72.5 % at 65.4 V/μm, representing a 539 % increase compared to pure PDMS (∼18.6 %). This study provides an effective strategy for developing advanced DE composites with high electro-actuated properties at low electric fields.

Abstract Image

Abstract Image

通过构建半互锁双网络改进聚二甲基硅氧烷基复合介电弹性体的电致动性能
介电弹性体作为一种典型的电活性聚合物,在各种应用中具有重要的潜力。然而,传统的DE材料往往需要较高的电场才能达到优异的电致动性能,这严重限制了其实际应用。本研究引入乙烯基甲基硅酮(VMQ)大分子链作为高粘性增塑剂,降低聚二甲基硅氧烷(PDMS)基DE复合材料的弹性模量。采用巯基和十八烷接枝的双硅烷修饰TiO2纳米粒子(mTO)提高了DE复合材料的介电常数。这些组分的协同作用使DE复合材料的电致动性能有了显著的提高。此外,mTO和VMQ上的官能团之间的巯基点击化学反应使pdms弹性体内部形成半互锁交联的网络结构。该网络有效地缓解了长期使用DE复合材料过程中增塑剂浸出的问题。由10 wt% mTO和20 wt% VMQ组成的基于PDMS的复合材料在65.4 V/μm下实现了72.5%的显著电致应变,与纯PDMS相比增加了539%(约18.6%)。本研究为开发低电场下具有高电致动性能的先进DE复合材料提供了有效的策略。
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
Polymer
Polymer 化学-高分子科学
CiteScore
7.90
自引率
8.70%
发文量
959
审稿时长
32 days
期刊介绍: Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics. The main scope is covered but not limited to the following core areas: Polymer Materials Nanocomposites and hybrid nanomaterials Polymer blends, films, fibres, networks and porous materials Physical Characterization Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films Polymer Engineering Advanced multiscale processing methods Polymer Synthesis, Modification and Self-assembly Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization Technological Applications Polymers for energy generation and storage Polymer membranes for separation technology Polymers for opto- and microelectronics.
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