双荷层蜘蛛网增强导电弹性体复合材料的力电响应:实验与分子模拟

IF 8.1 2区 材料科学 Q1 ENGINEERING, MANUFACTURING
Bangwei Wan , Yong Yuan , Yang Yang , Rongxin Guo , Xiaotao Yu , Xuan Wu
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引用次数: 0

摘要

导电弹性体通过其电阻响应信号被广泛应用于柔性电子产品中,用于实时变形监测。然而,传统的导电弹性体在这些信号中经常表现出肩峰效应,严重影响了监测过程的稳定性。在本研究中,利用聚甲基氢硅氧烷(PMS)将线性交联结构的弹性体(SR)转化为蛛网状网络(SRHT)。同时,引入阴离子十二烷基硫酸钠(SDS)和阳离子十四烷基三甲基溴化铵(TTAB)在多壁碳纳米管(MWCNT)表面形成双电荷层,从而构建了具有双电荷层(ASR)的蛛网状导电弹性体。这种结构产生了静电斥力和空间电位阻力的协同机制,有效地防止了SRHT中的团聚。实验结果表明,ASR使电阻响应滞后面积减小了36.79%,消除了电阻响应信号中的肩峰效应。采用实验分析和分子动力学模拟相结合的方法研究了肩峰效应的来源及其抑制机制。此外,ASR还表现出增强的力学性能,抗拉强度和断裂伸长率分别提高了49.93%和62.8%。该材料具有优异的应变传感性能,测量因子(GF)高达2390.29,响应时间为222 ms。ASR在航空航天、柔性电子、智能监控等领域具有广阔的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Force-electric response of conductive elastomer composites reinforced with double-charged layer spider webs: experiments and molecular simulations
Conductive elastomers are widely used in flexible electronics for real-time deformation monitoring through their resistance response signals. However, conventional conductive elastomers often exhibit shoulder peak effects in these signals, significantly compromising the stability of the monitoring process. In this study, the linear cross-linked structure of the elastomer (SR) was transformed into a spiderweb-like network(SRHT) using polymethylhydrosiloxane (PMS). Meanwhile, anionic sodium dodecyl sulfate (SDS) and cationic tetradecyltrimethylammonium bromide (TTAB) were introduced to form a double-charge layer on the surface of multi-walled carbon nanotubes (MWCNT), enabling the construction of a spiderweb-like conductive elastomer with a double-charge layer (ASR). This structure generated a synergistic mechanism of electrostatic repulsion and spatial potential resistance, effectively preventing agglomeration in SRHT. Experimental results showed that ASR reduced the resistance response hysteresis area by 36.79 %, eliminating the shoulder peak effect in the resistive response signal. A combination of experimental analysis and molecular dynamics (MD) simulations was used to investigate the origin of the shoulder peak effect and its suppression mechanism. Additionally, ASR exhibited enhanced mechanical properties, with tensile strength and elongation at break increasing by 49.93 % and 62.8 %, respectively. The material demonstrated excellent strain-sensing performance, achieving a high gauge factor (GF) of 2390.29 and a response time of 222 ms. ASR has great application prospects in aerospace, flexible electronics, intelligent monitoring and other fields.
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来源期刊
Composites Part A: Applied Science and Manufacturing
Composites Part A: Applied Science and Manufacturing 工程技术-材料科学:复合
CiteScore
15.20
自引率
5.70%
发文量
492
审稿时长
30 days
期刊介绍: Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.
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