Creation of Thermal Conductive Composeite Insulating Material Using Electro Adsorption Method

2018 Fiscal Year Final Research Report

• Project/Area Number: 15K05938
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Toyohashi University of Technology
• Principal Investigator: MURAKAMI Yoshinobu 豊橋技術科学大学, 工学(系)研究科(研究院), 准教授 (10342495)
• Research Collaborator: NAGAO Masayuki ; KAWASHIMA Tomohiro ; MUTO Hiroyuki
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: 静電吸着法 / 六方晶窒化ホウ素 / 熱可塑性ポリイミド / コンポジト材料 / 絶縁破壊の強さ / 熱伝導率

Outline of Final Research Achievements

To develop a thermally conductive and electrically insulating composite material with high thermal conductivity and acceptable breakdown strength, polymethylmethacrylate (PMMA)/hexagonal boron nitride (h-BN) composite materials were produced by electrostatic adsorption method.
The breakdown strength of the composite which the flaky surfaces of h-BN was oriented parallel to the thickness direction, was smaller than that of the composite which the flaky surfaces of h-BN was oriented perpendicular to the thickness direction. On the other hand, the thermal conductivity exhibited the inverse trend to the breakdown strength. The orientation　direction　of　hBN　and　the　orientation　direction　of　the　interface　between　the　hBN　and　PMMA　influenced to these properties.
The properties of the composite material can be easily changed as necessary controlled by each factors.

Free Research Field

誘電・絶縁物性工学、高電圧工学、計測光学

Academic Significance and Societal Importance of the Research Achievements

作製したコンポジット材料は理論的には均一分散の材料であり、それらを前提とした熱伝導率の理論式や熱流シミュレーションなどと比較検討できるため学実的価値は高い。また。各種電力機器の開発は絶縁材料の開発と言っても過言ではなく、放熱の問題は電力機器のみならずあらゆる機器の信頼性に関わる問題のため、簡易な方法な方法で作製でき、かつこれまでにない優れた特性をもつ放熱性コンポジット材料は社会的・工業的意義が極めて大きい。