摘要
磁流变弹性体是一类由液态高分子聚合物和软磁颗粒固化而成的智能材料,具有优良的柔韧性和弹性,可作为柔性传感器的电介质。然而传统预结构制备的磁流变弹性体电学性能较弱,具体表现为灵敏度较低、压力响应范围较小。针对此问题,基于磁流变弹性体的磁致链化效应,在其固化过程中利用外加磁场调控形成凹凸形貌,以此提高灵敏度并拓宽压力响应范围。设计了不同固化磁场强度、羰基镍粉含量的预结构、非预结构制备的磁流变弹性体电介质样品;通过性能测试平台开展了压容特性测试;对比分析了样品的初始电容、压力-电容关系、压力-电容相对变化关系、低压性能。结果表明:非预结构制备的电介质样品的灵敏度、压力响应范围、低压性能明显优于预结构制备样品。
Magnetorheological elastomer(MRE) are a class of smart materials cured from liquid polymers and soft magnetic particles with excellent flexibility and elasticity, which can be used as dielectrics for flexible sensors. However, the electrical properties of MRE prepared by traditional pre-structures are weak, which are characterized by low sensitivity and small pressure response range. To address this problem, based on the magnetostrictive effect of MRE, a concave-convex morphology is formed during the curing process by using an applied magnetic field to modulate the formation of a concaveconvex morphology, which improves the sensitivity and broadens the pressure response range. Pre-structured and non-prestructured MRE samples with different curing magnetic field strengths and nickel carbonyl powder contents were designed;pressure-capacitance characterization was carried out by a performance test platform;and the initial capacitance, pressure-capacitance relationship, pressure-capacitance relative change relationship, and low-pressure performance of the samples were comparatively analyzed. The results show that the sensitivity, pressure response range, and low-pressure performance of the non-pre-structured prepared dielectric samples are significantly better than those of the pre-structured prepared samples.
作者
付本元
王紫佩
王宏
居本祥
段俞洲
徐乾华
FU Ben-yuan;WANG Zi-pei;WANG Hong;JU Ben-xiang;DUAN Yu-zhou;XU Qian-hua(College of Mechanical Engineering,Chongqing University of Technology,Chongqing 400054,China)
出处
《磁性材料及器件》
2025年第1期26-32,共7页
Journal of Magnetic Materials and Devices
基金
国家自然科学基金资助项目(52375084)
重庆市教育委员会科学技术研究项目(KJQN202201166)
重庆理工大学研究生教育高质量发展项目(gzlcx20232129,gzlcx20232127)。
关键词
磁流变弹性体
压容特性
磁控结构
Magnetorheological elastomer
Pressure-capacitance characteristics
Magnetic control structure
