纳米钛酸钡负载还原氧化石墨烯/PBO纳米复合材料的制备和性能  

Preparation and Properties of Barium Titanate Nanoparticles Loaded Reduced Graphene Oxide/PBO Nanocomposite

作　　者：陈一[1] 陈文旗[1] 成群林[1] 李中权[1] 庄启昕[2] CHEN Yi;CHEN Wen-qi;CHENG Qun-lin;LI Zhong-quan;ZHUANG Qi-xin(Shanghai Spaceflight Precision Machinery Institute,Shanghai 201600,China;Key Laboratory of Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]上海航天精密机械研究所,上海201600 [2]华东理工大学材料科学与工程学院,特种功能高分子材料及相关技术教育部重点实验室,上海200237

出　　处：《功能高分子学报》2018年第6期569-577,共9页Journal of Functional Polymers

基　　金：上海市科委扬帆计划(17YF1408100);中央高校基本科研业务费专项资金资助(222201817001);国家自然科学基金(51573045)

摘　　要：利用溶剂热法制备了纳米钛酸钡(BT)负载还原氧化石墨烯(RGO)纳米粒子(RGOBT)。透射电子显微镜照片显示BT纳米粒子直径为20~30nm。采用叔丁基二甲基氯硅烷(TBS)预处理保护4,6-二氨基间苯二酚盐酸盐(DAR)后再与对苯二甲酰氯冷凝聚合制备聚亚苯基苯并二噁唑(PBO)前驱体(TBS/prePBO),并通过溶液浇注法及逐步升温关环热处理两步法制备了RGO-BT/PBO三元复合材料薄膜。当RGO-BT质量分数达到10%时,复合材料膜的拉伸强度和杨氏模量较纯PBO薄膜的相应值分别提高84%和200%。高介电BT纳米粒子和RGO纳米薄层界面极化的协同作用可大幅提高复合材料的介电性能。当RGO-BT的质量分数为10%时,复合材料介电常数为纯PBO介电常数的近15倍,未来此种高介电材料有望作为耐高温高储能密度材料用于极端环境下的紧凑储能元器件中。Barium titanate(BT)nanoparticles loaded reduced graphene oxide(RGO-BT)was prepared through a solvothermal method,and the diameter of BT was 20~30 nm verified by transmission electron microscope.Precursor of tert-butyldimethylsiyl chloride(TBS)terminated PBO(TBS/prePBO)was synthesized by a condensation polymerization of paraphthaloyl chloride with 4,6-diaminoresorcinol dihydrochloride(DAR)protectively pretreated by TBS.PBO doping with RGO-BT(RGO-BT/PBO)ternary composite films were prepared by a solution casting and stepwise heating cyclization treatment.Studies showed RGO-BT/PBO could improve tensile strength and Young’s modulus compared with PBO.When the mass fraction of RGO-BT was 10%,the tensile strength and Young’s modulus increased by 84%and 200%,respectively.Dielectric performance of composite was greatly improved by a synergistic effect of high dielectric constant of BT and interfacial polarization of graphene nanosheets.When the mass fraction of RGO-BT rose up to 10%,the dielectric constant of composite reached as high as 42.77 which was nearly 15 times larger than that of pure PBO polymer and had a good stability(47.38-41.63)in a wide frequency range of 10 1-10 4 Hz.

关 键 词：BT RGO PBO 纳米复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]