Hexagonal boron nitride-carbon nanotube hybrid network structure for enhanced thermal, mechanical and electrical properties of polyimide nanocomposites

Autor(es)

Park, Ok-Kyung ^[1] ; Owuor, Peter Samora ^[2] ; Jaques, Ygor Morais ^{[2, 3, 4]} ; Galvao, Douglas Soares ^{[3, 4]} ; Kim, Nam Hoon ^{[5, 6]} ; Lee, Joong Hee ^{[5, 6]} ; Tiwary, Chandra Sekhar ^{[2, 7]} ; Ajayan, Pulickel M. ^[2]

Afiliação do(s) autor(es)

^[1] Jeonbuk Natl Univ, Carbon Nano Convergence Technol Ctr Next Generat, Jeonju - South Korea

^[2] Rice Univ, Dept Mat Sci & Nano Engn, Houston, TX 77005 - USA

^[3] Univ Campinas UNICAMP, Appl Phys Dept, BR-13083859 Campinas, SP - Brazil

^[4] Univ Campinas UNICAMP, Ctr Computat Engn & Sci, BR-13083859 Campinas, SP - Brazil

^[5] Jeonbuk Natl Univ, Adv Mat Res Inst BIN Convergence Technol, Jeonju - South Korea

^[6] Jeonbuk Natl Univ, Dept BIN Convergence Technol, Jeonju - South Korea

^[7] Indian Inst Technol Kharagpur, Dept Met & Mat Engn, Kharagpur 721302, W Bengal - India

• Tipo de documento: Artigo Científico
• Fonte: COMPOSITES SCIENCE AND TECHNOLOGY; v. 188, 2020.
• Citações Web of Science: 0

Resumo

This study suggests the simple and effective synthesis method of chemically interconnected hexagonal boron nitride (h-BN)-carbon nanotubes (CNTs) hybrid materials (BN-Fe-CNT) with aminosilane functionalized iron oxide nanoparticles (NH2-Fe) via amide bond formations. Synthesized BN-Fe-CNT was acting as an effective filler that enhanced the mechanical, thermal, and electrical properties of polyimide (PI) nanocomposites and accelerated polycondensation reaction of poly(amic acid) (PAA) due to its high thermal conductivity and heat diffusivity. At a 2 wt% filler reinforcement, the in-plane thermal conductivity of the BN-Fe-CNT/PI reached 15 W m(-1) K-1 at 200 degrees C, which represents an enhancement of approximately 11430% compared to that of pure PI. Moreover, thermal stability was enhanced from 400 degrees C to 570 degrees C. Furthermore, the connected CNTs between the individual h-BN produced electron pathways through the PI matrix, with the BN-Fe-CNT/PI exhibiting 10(6)times higher electrical conductivity than that of pure PI. The results in this study clearly suggested that the BN-Fe-CNT could be applicable as an effective multi-functional reinforcement in the fabrication of lightweight polymer nanocomposites with superior mechanical properties, high thermal properties, and high electrical conductivities. (AU)

• Processo FAPESP: 16/12341-5 - Efeitos de Contaminantes na Molhabilidade de Materiais Bi-dimensionais
• Beneficiário: Ygor Morais Jaques
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs