高介电常数纳米碳/双马来酰亚胺树脂复合材料的空间结构与介电性能的关联机制研究

项目名称： 高介电常数纳米碳/双马来酰亚胺树脂复合材料的空间结构与介电性能的关联机制研究

项目编号： No.51473107

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： 梁国正

作者单位： 苏州大学

项目金额： 83万元

中文摘要： 高介电常数聚合物基复合材料（Hik-PMC）是研究十分活跃的功能材料，实现低介电损耗、高介电强度及结构/功能一体化是Hik-PMC研究的关键。复合材料组成（功能体和聚合物）对介电性能的影响已得到充分研究，而空间结构与介电性能关联机制的研究则刚刚起步。前期研究证明基于相同的复合材料组成，改变空间结构可得到介电性能迥异的材料，但空间结构与介电性能关系及其本质不明。本项目以双马来酰亚胺树脂为基体，分别以纳米碳黑、碳纳米管、石墨烯为功能体，以梯度、取向和层状结构为基本空间模型，设计构筑空间结构不同的系列复合材料；探讨复合材料在电场作用下发生的极化、电荷积累与重排及其动力学，关联空间结构与介电机制的关系；研究典型外场下空间结构及介电性能的稳定性；构筑材料组成－工艺－空间结构－介电性能关系；考察优选复合材料的其他重要性能（耐热、耐湿和动/静态力学性能），制得基于空间结构调控的新型高性能Hik-PMC。

中文关键词： 有机无机复合材料；空间结构；介电性能

英文摘要： Polymeric composites with high dielectric constant (Hik-PMC) have been gained great attentions worldwide, achieving low dielectric loss, high electric strength and the combination of structural and functional performances are the main targets of the research on Hik-PMC. The influence of the components (functional fillers and resins) on the dielectric properties has been widely and deeply studied; however less attention has been paid on the relationship between the spatial structure and dielectric property as well as the nature behind. Previous investigations show that based on the same functional fillers and polymers, by changing the spatial structure, the dielectric properties of the resultant composites were greatly changed, but the relationship between the the spatial structure and dielectric property as well as its mechanism are still not revealed. In this proposal, the representative of high performance thermosetting resins, bismaleimide resin, is selected as the matrix; while nanocarbon, carbon nanotube or graphene is chosen as the electric conductor. By designing new spatial structures based on the combination of gradient distribution, orientation, and/or laminate structures, a series of new composites with different spatial structures will be fabricated. The main discussion subjects include the charge accumulation, rearrangement and kinetics of the composites in electric field, the correlation between spatial structure and dielectric properties as well as the stability under typical external fields; the component-processing-spatial structure-dielectric properties relationship; the typical integrated performances (thermal and hot-wet properties, dynamic/static mechanical properties) of the composites with good dielectric properties. Through these investigations, new high performance Hik-PMCs based on the controlling of spatial structure will be developed.

英文关键词： Organic/inorganic composites;Spatial structure;Dielectric properties