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Dielectric and Electrical Insulation Performance of Polymer Nanocomposites Viewed from Mesoscopic Properties of Organic and Inorganic Nano-scale Interfaces

从有机和无机纳米尺度界面的介观性质看聚合物纳米复合材料的介电和电绝缘性能

基本信息

批准号：
17360145
负责人：
TANAKA Toshikatsu
金额：
$ 9.29万
依托单位：
Waseda University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2007
项目状态：
已结题

项目摘要

Polymer nanocomposites are advanced new materials attracting much attention in the field of dielectric and electrical insulation, which we, the investigators, played a pioneering work based on our past JSPS Research Project 14350171(FY2002- FY2004). They are characteristic in the fact that conventional polymers could be transformed into new materials with superior performance as dielectrics and electrical insulating materials, by just dispersing a small amount of nano-fillers into polymer matrices. Scientific and engineering challenge was made focusing on a physico-chemical model for nano-scale interfaces in mesoscopic material regions. A multi-core interfacial model was proposed and investigated with experimental findings on polymer nanocomposites. Experimental work was especially focused on partial discharge resistance and treeing resistance performances that were found to be subject to remarkably favorable change as compared with other properties. Conclusion obtained in the JSPS Res … More earch Project 17360145(FY2005 -FY2007) is as follows :(1) The multi-core interfacial model was scientifically deepened by the coarse-grained molecular dynamics simulation. Polymer chains would interact with the surfaces of nano-fillers that are characterized by the multi-core model(2) The multi-core model would explain a majority of dielectric and electrical insulating properties of nanocomposites, including dielectric properties, electrical conductivity, high field electrical conduction, space charge injection, dielectric breakdown, partial discharge resistance, teeing resistance, and tracking resistance.(3) Partial discharge(PD) resistance was found to exhibit remarkable improvement, if polymers axe nano-structured. This phenomenon was considered to take place by the fact that the polymer matrices are segmented three-dimensionally in nano-scale, which was analyzed by the multi-core model.(4) Treeing resistance also showed much improvement Especially treeing lifetime is much extended under moderate electric field condition. This performance was considered to appear due to PD resistance improvement Tree initiation voltage is lowered by the suppression of charge injection that could be analyzed by the multi-core model. Tree propagation is divided into two processes, i.e. it is slowed down by nano-scale obstacles, and is speeded up through coulombic repulsion caused by the charge tails of“multi-cored nano-particles". Less

聚合物纳米复合材料是介电和电绝缘领域备受关注的先进新材料，我们的研究人员在过去的JSPS研究项目14350171（FY 2002-FY 2004）的基础上进行了开创性工作。它们的特点在于，传统的聚合物可以转化为具有上级性能的新材料，作为绝缘材料和电绝缘材料，只需将少量的纳米填料分散到聚合物基体中。科学和工程的挑战是集中在介观材料区域的纳米尺度界面的物理化学模型。提出了一个多核界面模型，并结合聚合物纳米复合材料的实验结果进行了研究。实验工作特别集中在局部放电电阻和树枝电阻性能，发现受到显着有利的变化相比，其他性能。JSPS Res中的结论 ...更多信息具体内容如下：（1）通过粗粒化分子动力学模拟，对多核界面模型进行了科学深化。聚合物链将与纳米填料的表面相互作用，其特征在于多核模型（2）多核模型将解释纳米复合材料的大部分介电和电绝缘性能，包括介电性能、电导率、高场电导、空间电荷注入、介电击穿、局部放电电阻、T形电阻和漏电起痕电阻。(3)研究发现，聚合物纳米化后，其耐局部放电性能有显著提高。这一现象被认为是由于聚合物基体在纳米尺度上是三维分段的，并通过多核模型进行了分析。(4)抗树枝化性能也有很大提高，特别是在中等电场条件下，树枝化寿命大大延长。这种性能被认为是由于PD电阻的改善而出现的。树起始电压通过抑制电荷注入而降低，这可以通过多核模型来分析。树木的生长分为两个过程，即纳米级障碍物使树木生长减慢，而“多核纳米粒子”的电荷尾引起的库仑排斥使树木生长加快。少