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Enhanced Thermal Conductivity of Segregated Poly(vinylidene fluoride) Composites via Forming Hybrid Conductive Network of Boron Nitride and Carbon Nanotubes
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2018-07-18 , DOI: 10.1021/acs.iecr.8b01764
Zhi-Guo Wang 1 , Yan-Fei Huang 1 , Guo-Qiang Zhang 2 , Han-Qin Wang 1 , Jia-Zhuang Xu 1 , Jun Lei 1 , Lei Zhu 2 , Feng Gong 3 , Zhong-Ming Li 1
Affiliation  

This work placed an emphasis that constructing segregated boron nitride (BN)/carbon nanotube (CNT) hybrid network brought an immense benefit to enhance the thermal conductivity (TC) of poly(vinylidene fluoride) (PVDF) composites. The segregated composites ((CNT + BN)@PVDF) showed a high TC of 1.8 W/mK at the total filler fraction of 25 vol %, outperforming PVDF composites with random structure (CNT/BN/PVDF) and segregated BN structure (BN@PVDF) by 169% and 50%, respectively. Infrared thermal images further demonstrated that (CNT + BN)@PVDF exhibited superior capability to dissipate heat compared to BN/PVDF. The segregated architecture increased the effective utilization of fillers and interfacial thermal resistance between neighboring BN platelets was reduced by the bridging effect of CNTs. Molding pressure and temperature governed the integration of segregated networks and thus the enhancement efficiency of TC. The design of hybrid segregated structure holds promise in a broad range of the preparation of thermal management materials.

中文翻译:

通过形成氮化硼和碳纳米管的杂化导电网络增强隔离的聚偏二氟乙烯复合材料的导热性

这项工作强调建立隔离的氮化硼(BN)/碳纳米管(CNT)混合网络带来了巨大的好处,可以提高聚偏二氟乙烯(PVDF)复合材料的导热系数(TC)。分离的复合材料((CNT + BN)@PVDF)在总填充量为25 vol%时显示出较高的TC,为1.8 W / mK,优于具有随机结构(CNT / BN / PVDF)和分离的BN结构(BN)的PVDF复合材料@PVDF)分别降低169%和50%。红外热图像进一步表明,与BN / PVDF相比,(CNT + BN)@PVDF表现出了优异的散热能力。分离的体系结构提高了填料的有效利用率,相邻的BN血小板之间的界面热阻由于CNT的桥连作用而降低。成型压力和温度控制着隔离网络的集成,从而控制了TC的效率。混合隔离结构的设计在各种热管理材料的制备中都具有希望。
更新日期:2018-07-19
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