Studies on the effect of chemical structure of modified filler for high performance polyimide composites

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K15043
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 26030:Composite materials and interfaces-related
• Research Institution: Chubu University
• Principal Investigator: Morimune-Moriya Seira (森棟せいら) 中部大学, 工学部, 講師 (30748942)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: ポリイミド / ナノダイヤモンド / 高分子系ナノ複合材料 / 力学物性 / 熱物性 / 熱伝導性 / 補強効果 / 化学修飾

Outline of Final Research Achievements

Nanodiamond (ND) reinforced polyimide (PI) nanocomposites were prepared by in-situ polymerization. In order to improve the compatibility of PI and ND, alkyl groups with various chain lengths were introduced on the ND surface by chemical modifications. The mechanical properties, thermal resistances and thermal conductivities were increased by the incorporation of NDs. The Young's modulus and the thermal conductivity incerased by the increasing of the chain length on ND surface. It was revealed that the chemical interaction and the phisical interaction at the interface between ND and PI were largely affected by the chemical structure of the fillers.

Free Research Field

高分子系複合材料，高分子構造・物性

Academic Significance and Societal Importance of the Research Achievements

フィラーがポリイミド（PI）中にて高分散する新規複合化手法を開発した。本手法は他材料にも適用可能であり，他材料との複合化に限界が生じていたPI系複合材料に広く普及すると予測できる。また，高分子複合材料において，フィラー表面の化学構造は構造および物性に大きく影響するにも関わらず，これまでフィラーの修飾鎖長と複合材料の構造・物性との関係の詳細を統計的に解析した例はない。本研究によりフィラー表面の修飾鎖長がどのように複合材料の構造・物性に影響するのか詳細を明らかにしたことは，今後の高分子複合材料の設計において非常に有用な指標となる。