微驱动器用新型高介电低模量的聚硅氧烷介电弹性体的设计与制备

项目名称： 微驱动器用新型高介电低模量的聚硅氧烷介电弹性体的设计与制备

项目编号： No.51473011

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 田明

作者单位： 北京化工大学

项目金额： 84万元

中文摘要： 介电弹性体驱动器(DEA) 在微型机器人和人工肌肉等领域应用前景广阔。设计制备高介电低模量的新型介电弹性体(DE)是发展低驱动电压大应变的新一代DEA的关键。本项目拟采用阴离子开环聚合方法制备高乙烯基含量(5~40mol%)的聚甲基乙烯基硅氧烷(H-MVQ)，然后基于巯基-双键点击反应调控接枝极性侧基的性质(如：腈基、羧基、酯基、羟基)、含量及分布，期望制备新型高介电低模量的聚硅氧烷介电弹性体；揭示分子结构(分子量、交联密度、极性侧基的性质、含量及分布)对介电性能和粘弹性的影响关系，建立分子结构-本征性能(介电性能、模量、粘弹性)-电驱动行为(有效压缩力、驱动应变、弹性应变能密度、电机耦合效率)间的相互关系，为新型DE的分子设计提供一种新思路，指导高性能DE及DEA的设计制备与应用。预期发表高水平SCI论文8~10篇，申请发明专利3~5项。

中文关键词： 介电弹性体；聚硅氧烷；点击化学；介电性能；驱动应变

英文摘要： Dielectric elastomer actuators (DEA) find many applications in industry such as micro-robotics and artificial muscles etc. A key toward the next generation DEA with large strain under low driving voltage is to develop dielectric elastomers (DE) with high dielectric constant and low elastic modulus. In this project, we will first prepare polymethylvinylsiloxane (H-MVQ) with a high content of vinyl (5~40 mol%) by using anionic ring-opening polymerization method. Then, we will graft various kinds of polarized groups such as nitrile group, carboxy group, ester group, and hydroxy group on the as-prepared H-MVQ by using Thiol-ene click chemistry. We expect to prepare the new type of polysiloxane DE with high dielectric constant and low elastic modulus by controlling the types, contents and distribution of the grafted polarized groups on H-MVQ chains. Meanwhile, we will reveal the effect of the molecular structure of polysiloxane DE such as molecular weight, crosslink degree, and the chemical characteristics, content and distribution of the grafted polarized groups on the dielectric properties and the viscoelasticity of the as-prepared polysiloxane DE. In addition, we will build the molecular structure-intrinsic properties (dielectric property, elastic modulus and viscoelasticity)-actuation behaviors (effective compressive force, actuated strain, elastic strain energy density, electric-mechanical coupling efficiency) relationships. Our goal is to provide guidance for the design, preparation and application of novel high performance DE and DEA. We expect to publish 8-10 papers in the most famous international academic publications and apply 3-5 patents.

英文关键词： dielectric elastomers;polysiloxane;click chemistry;dielectric properties;actuated strain