表面负载Fe_(3)O_(4)对BT@PANI/PVDF复合材料介电性能的影响  

Effect of surface loading Fe_(3)O_(4)on the dielectric properties ofBT@PANI/PVDF composites

作　　者：王海燕[1] 王初晗 李澜[2] 尚天蓉 WANG Haiyan;WANG Chuhan;LI Lan;SHANG Tianrong(School of Materials Science and Engineering,Lanzhou 730050,China;College of Petrochemical Technology,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]兰州理工大学石油化工学院,兰州730050

出　　处：《功能材料》2023年第10期10089-10097,共9页Journal of Functional Materials

基　　金：国家自然科学基金项目(51767016)。

摘　　要：通过氧化沉淀法制备出钛酸钡@聚苯胺-四氧化三铁(BT@PANI-Fe_(3)O_(4))核壳粒子,并以此为填料制备了聚偏氟乙烯(PVDF)介电复合材料,研究了硫酸亚铁铵(FAS)与BT@PANI核壳粒子的质量比对复合材料介电性能的影响。结果表明:在测试频率范围,复合材料的介电常数随着FAS与BT@PANI质量比的增加而增大,当FAS与BT@PANI核壳粒子的质量比为1∶1时,BT@PANI-Fe_(3)O_(4)/PVDF复合材料的介电常数可达14(100 Hz),与BT@PANI/PVDF(12,100 Hz)复合材料相比,介电常数得到提高,介电损耗保持在0.1左右,在高频时,BT@PANI-Fe_(3)O_(4)/PVDF介电损耗(0.03,104 Hz)小于BT@PANI/PVDF(0.09,104 Hz)复合材料,满足实际应用。报道的多壳层策略可以扩展到各种无机杂化物,以开发新型介电纳米复合材料。In this paper,barium titanate@polyaniline-ferroferricoxide(BT@PANI-Fe_(3)O_(4))core-shell particles were prepared by oxidation precipitation method,and the polyvinylidene fluoride(PVDF)dielectric composites were prepared with this filler.The effect of the mass ratio of ferrous ammonium sulfate(FAS)to BT@PANI core-shell particles on the dielectric properties of the composites was investigated.The results showed that the dielectric constant of the composites increased with increasing mass ratio of FAS to BT@PANI in the frequency range.The dielectric constant of BT@PANI-Fe_(3)O_(4)/PVDF composites reached 14(100 Hz)when the mass ratio of FAS to BT@PANI core-shell particles was 1∶1,compared with BT@PANI/PVDF composites(12,100 Hz),and the dielectric constant was improved and the dielectric loss remained around 0.1.At high frequency,the BT@PANI-Fe_(3)O_(4)/PVDF dielectric loss(0.03,104 Hz)was lower than that of BT@PANI/PVDF(0.09,104 Hz)composites,which satisfied practical applications.The multi-shell layer strategy reported in this paper can be extended to various inorganic hybrids to develop innovative dielectric nanocomposites.

关 键 词：聚合物基复合材料 介电性能 核壳粒子 钛酸钡 四氧化三铁 

分 类 号：TB33[一般工业技术—材料科学与工程]