Multifunctional boron nitride nanosheets cured epoxy resins with highly thermal conductivity and enhanced flame retardancy for thermal management applications

被引:43
作者
Bao, Qiuru [1 ]
He, Ren [2 ]
Liu, Yuan [1 ]
Wang, Qi [1 ]
机构
[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Polymer Res Inst, Chengdu 610065, Peoples R China
[2] China Acad Engn Phys, Mianyang 621900, Peoples R China
关键词
Epoxy resin; Thermal conductivity; Flame retardancy; Boron nitride nanosheets; PHYTIC ACID; COMPOSITES; GRAPHENE; NANOCOMPOSITES; INTERFACE; BLEND;
D O I
10.1016/j.compositesa.2022.107309
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
With the rapid improvement of microelectronics integration and assembly technology, the increasing heat flux density in electronic devices puts forward higher requirements for efficient heat dissipation and fire safety of thermal management materials (TMMS). In this work, we proposed a facile method to exfoliate and organically modify hexagonal boron nitride (h-BN) via phytic acid assisted-ball milling and self-assembly of zeolitic imi-dazolate frameworks (ZIF-8). And the obtained multifunctional additive (BAZF) successfully achieved the syn-ergistic integration of highly thermal conductivity and superior fire safety in epoxy resin (EP). Besides, BAZF was also utilized as a curing agent to initiate the crosslinking reaction of EP, and the activation energy (E alpha) and kinetic parameters of curing process were obtained by the fitting of Kissinger and Crane equation. Compared to EP, the peak heat release rate (PHRR), smoke production rate (SPR) of EP composites containing 16 wt% BAZF significantly reduced by 58.2% and 47.7%, respectively, showing superior flame retardancy. Contributed by the good compatibility between fillers and matrix, BAZF significantly enhanced the thermal conductivity and me-chanical properties of EP composites. As a result, this work provides a cost-effective route for the preparation of epoxy-based TMMS, which shows significant potential application in modern microelectronic industry.
引用
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页数:10
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