摘要
以聚偏氟乙烯(polyvinylidene fluoride,PVDF)为基体,氮化硼(boron nitride,BN)和羟基化多壁碳纳米管(multi-walled carbon nanotubes,MWCNT)为填料,采用溶液共混法制备MWCNT/BN/PVDF三相复合材料,分别采用扫描电子显微镜、X射线衍射仪和宽频介电与阻抗谱仪对该三相复合材料的微观形貌、结构、导电及介电性能进行测试和表征,并与MWCNT/PVDF复合材料进行对比。结果表明:MWCNT与BN在PVDF基体中分散均匀;单独添加MWCNT时,PVDF的晶型无明显变化,但BN的加入会促进PVDF的α晶型生成;BN质量分数为4%、MWCNT质量分数为1.00%时获得的MWCNT/BN/PVDF三相复合材料,其在10^(2) Hz时的电导率比MWCNT质量分数为1.00%时的MWCNT/PVDF复合材料小2个数量级;在BN质量分数为4%的情况下,当MWCNT质量分数分别为1.00%和0.75%时,MWCNT/BN/PVDF三相复合材料在10^(2) Hz时的介电常数可达229.72和49.26,介电损耗分别为5.920和0.086,远远小于相同MWCNT质量分数的MWCNT/PVDF复合材料的介电损耗64.98和2.28。所制备的高介电常数、低介电损耗的聚合物基三相复合材料在微电子行业将具有重要的应用前景。
MWCNT/BN/PVDF three-phase composites were prepared by solution blending with polyvinylidene fluoride(PVDF)as the matrix,boron nitride(BN)and hydroxylated multi-walled carbon nanotubes(MWCNT)as fillers.Scanning electron microscopy,X-ray diffraction and broadband dielectric and impedance spectrometer were used to characterize the morphology,structure,conductivity and dielectric properties of the composites.The results show that MWCNT and BN are uniformly dispersed in PVDF matrix.The addition of MWCNT has little effect on the crystal form of PVDF while BN can promote the formation ofαcrystal form.The conductivity at 10^(2) Hz of MWCNT/BN/PVDF composites with 4%BN and 1.00%MWCNT is two orders of magnitude smaller than that of MWCNT/PVDF composites with 1.00%of MWCNT.When MWCNT mass fraction is 1.00%and 0.75%,the dielectric constant at 10^(2) Hz of MWCNT/BN/PVDF composites can reach 229.72 and 49.26,and the dielectric loss is only 5.920 and 0.086 which is much smaller than 64.98 and 2.28 of MWCNT/PVDF composites with the same content of MWCNT.The prepared polymer-based three-phase composites with high dielectric constant and low dielectric loss have important application prospects in the microelectronics industry.
作者
顾怡
王静荣
徐海萍
杨丹丹
GU Yi;WANG Jingrong;XU Haiping;YANG Dandan(School of Environmental and Materials Engineering,Shanghai Polytechnic University,Shanghai 201209,China;Shanghai Engineering Research Center of Advanced Thermal Functional Materials,Shanghai Polytechnic University,Shanghai 201209,China)
出处
《东华大学学报（自然科学版）》
CAS
北大核心
2021年第2期19-25,共7页
Journal of Donghua University(Natural Science)
基金
国家自然科学基金资助项目(51207085,51607109)
上海市自然科学基金资助项目(16ZR1412400)
上海第二工业大学研究生基金资助项目(EGD18YJ0063)
上海第二工业大学重点学科(材料科学与工程)(XXKZD1601)
上海先进热功能材料工程技术研究中心资助项目。
关键词
聚偏氟乙烯
氮化硼
碳纳米管
三相复合材料
介电性能
polyvinylidene fluoride
boron nitride
carbon nanotube
three-phase composite
dielectric property
作者简介
通信作者:王静荣,女,副教授,研究方向为电子废弃物资源化,E-mail:jrwang@sspu.edu.cn。
