聚苯硫醚超细纤维导热复合材料的制备及其性能  

Preparation and Performance of Polyphenylene Sulfide Ultrafine Fiber Composites with Thermal Conductivity

作　　者：刘曼 余严 熊思维 王罗新 王桦 孙九霄[1] LIU Man;YU Yan;XIONG Siwei;WANG Luoxin;WANG Hua;SUN Jiuxiao(School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430073,Hubei,China;Sichuan Institute of Textile Science,Chengdu 610072,Sichuan,China)

机构地区：[1]武汉纺织大学材料科学与工程学院,湖北武汉430073 [2]四川省纺织科学研究院,四川成都610072

出　　处：《武汉大学学报（理学版）》2018年第5期399-406,共8页Journal of Wuhan University:Natural Science Edition

基　　金：国家科技支撑计划资助项目(2015BAE01B04);四川省科技计划项目(2018GZ0522)

摘　　要：采用模板法,以聚苯硫醚（PPS）超细纤维的三维网状结构为骨架,分别填充炭黑（CB）和乙炔黑（ACET）两种高导热填料,以PE蜡粉（PEW）为黏结剂,通过喷涂和热轧,使填料均匀分散在PPS超细纤维空隙之间,制得柔性PPS超细纤维导热复合材料.通过扫描电子显微镜（SEM）对其形貌进行表征,并研究了导热填料种类、含量与分散状态对PPS超细纤维导热复合材料的导热性能、热稳定性、力学性能、导电性能和透气性的影响.实验结果表明：以PEW分别与CB和ACET混合填充,能有效增强两种填料分散性,显著提高复合材料的导电、导热性能,且CB@PEW/PPS和ACET@PEW/PPS复合材料在300℃以下均无明显形变,透气率则均随着填料含量的增大而减小,CB@PEW/PPS复合材料的拉伸强度则随填料含量的增大呈先增大后减小趋势.在无脱粉现象发生的前提下,CB@PEW/PPS复合材料的导热性和热稳定性较好,ACET@PEW/PPS的透气性和导电性较好.By the template method,the three-dimensional network structure of polyphenylene sulfide（PPS）ultrafine fiber was used as the skeleton,which was filled with high thermal conductive filler such as carbon black（CB）acetylene black（ACET）,and PE wax powder（PEW）was used as the adhesive.Then,by spraying and hot rolling,the filler was uniformly dispersed between the PPS ultrafine fiber voids to obtain a flexible PPS ultrafine fiber thermal conductive composite material.The filler was evenly dispersed among the PPS ultrafine fiber voids by spraying and hot rolling.The scanning electron microscopy（SEM）was used to characterize the structure and morphology.The effect of the kinds,content and dispersion state of the thermally conductive filler on the thermal conductivity,heat resistance,mechanical properties,electrical conductivity and gas permeability of the PPS thermally conductive composites were investigated.The experimental results show that the PEW mixed with CB or ACET can effectively enhance the dispersibility of the two fillers and significantly improve the electrical and thermal conductivity of the composites.Moreover,both CB@PEW/PPS and ACET@PEW/PPS composites have no obvious deformation below 300℃;the air permeabilities of both composites decrease with the increase of filler content;and the tensile strength of CB@PEW/PPS composites firstly increases and then decreases with the increase of content.Under the premise of no powder removal,CB@PEW/PPS composites have the optimal thermal conductivity and heat resistance,and ACET@PEW/PPS have the optimal gas permeability and conductivity.

关 键 词：聚苯硫醚 柔性 导热性能 导电性能 炭黑 

分 类 号：O631.2[理学—高分子化学]