PANI@BT-hBN杂化填料及其PVDF基复合材料制备与性能  

Preparation and Properties of PANI@BT-hBN Hybrid Filler and Its PVDF Based Composites

作　　者：李国安[1] 邓伟[1] 任怡辰 吴斌 Li Guoan;Deng Wei;Ren Yichen;Wu bin(School of Material Science and Chemical Engineering,Harbin University of Science and Technology,Harbin 150040,China;Suzhou Taihu Electric Advanced Material Co.,Ltd.,Suzhou 215000,China)

机构地区：[1]哈尔滨理工大学材料科学与化学工程学院,哈尔滨150040 [2]苏州太湖电工新材料有限公司,江苏苏州215000

出　　处：《工程塑料应用》2022年第5期15-20,共6页Engineering Plastics Application

基　　金：黑龙江省自然科学基金联合引导项目(LH2019E059)。

摘　　要：为了提高填料分散性以改善聚合物基复合介电材料的性能,进而扩展其在电子电气领域的应用,采用乳液聚合法在钛酸钡(BT)粒子表面包覆聚苯胺(PANI),制得PANI@BT粒子,然后与氮化硼(hBN)共混得到多维杂化填料PANI@BT-hBN,将PANI@BT和PANI@BT-hBN分别与聚偏氟乙烯(PVDF)溶液共混获得复合材料,对比研究两种填料的结构形貌、在PVDF中的分散性以及复合材料的力学性能、介电性能和击穿场强。结果表明,PANI@BT粒子具有核壳结构,hBN的引入能够明显改善PANI@BT在聚合物基体内的分散性。随着填料含量的增加,复合材料的介电常数增大,当填料质量分数为50%时,PVDF/PANI@BT-hBN的介电常数在100 Hz时达到169,较PVDF/PANI@BT复合材料提高了103.6%。当填料质量分数为10%时,PVDF/PANI@BT-hBN复合材料的击穿场强达到最大值145.2 kV/mm,比PVDF/PANI@BT复合材料提高66.9%。PVDF/PANI@BT-hBN复合材料的拉伸强度和断裂伸长率随填料含量的增加而先增大后减小,且相较于PVDF/PANI@BT复合材料均有所提高。In order to improve the properties of polymer dielectric composites through increasing the dispersion of fillers for expanding its application in the field of electrical and electronic,emulsion polymerization method was utilized to coat polyaniline(PANI)on the surface of barium titanate(BT)to prepare PANI@BT particles,which was then blended with boron nitride(hBN)to obtain multi-dimensional hybrid fillers [e-mail] kinds of composites,polyvinylidene fluoride(PVDF)/PANI@BT and PVDF/PANI@BT-hBN,were prepared through solution blending.The structure and morphology of fillers,and their dispersion in the polymer matrix,as well as the mechanical,dielectric properties,and breakdown field strength of the composites were studied comparatively.The results show that the PANI@BT particles has a core-shell structure,and the addition of hBN significantly improves the dispersion of PANI@BT in the polymer matrix.The dielectric constant of the composite increases with the increasing of filler content.When the filler content is 50 wt%,PVDF/PANI@BT-hBN composite has the biggest dielectric constant of 169 at 100 Hz,which is 103.6%higher than that of PVDF/PANI@BT composites.When the filler content is 10 wt%,the breakdown field strength of PVDF/PANI@BT-hBN composite reaches the highest value of 145.2 kV/mm,which is increased by 66.9%compared with PVDF/PANI@BT composites.In addition,the tensile strength and elongation at break of PVDF/PANI@BT-BN increase first then decrease with the increasing of filler content,and both are improved compared with PVDF/PANI@BT composites.

关 键 词：聚偏氟乙烯 核壳结构 氮化硼 力学性能 介电性能 

分 类 号：TB33[一般工业技术—材料科学与工程]