碳纳米管和石墨烯与聚偏氟乙烯复合的PTC特性  

PTC characteristic of carbon nanotube and graphene composite with polyvinylidene fluoride

作　　者：易金桥[1,2] 黄勇[1] 姜胜林[2] 

机构地区：[1]湖北民族学院信息工程学院,湖北恩施445000 [2]华中科技大学光学与电子信息学院,湖北武汉430074

出　　处：《电子元件与材料》2014年第3期35-39,共5页Electronic Components And Materials

基　　金：国家自然科学基金资助项目(No.61378076;No.61261016;No.61263030);中小企业科技创新基金资助项目(No.12C26214204505);湖北省自然科学基金资助项目(No.2013CFB044)

摘　　要：以聚偏氟乙烯(PVDF)为基材,分别以多壁碳纳米管(MWCNT)和石墨烯微片(GNS)为导电介质,采用流延法制备了厚约120μm的MWCNT/PVDF和GNS/PVDF复合材料厚膜。通过阻抗测试和微观分析,研究了复合材料的电导率和PTC性能随导电介质含量变化的规律。研究结果表明,GNS/PVDF和MWCNT/PVDF复合材料的电导率均随着导电介质含量的增加而增大,相比而言,MWCNT/PVDF复合材料具有更好的亲和性和更高的PTC强度,且PTC强度随着导电介质含量的增加先增大后减小,当MWCNT的质量分数为2.5%时,MWCNT/PVDF复合材料的PTC强度获得最大值4.0。MWCNT/PVDF and GNS/PVDF composites with the thickness of 120μm were prepared by tape-casting process using polyvinylidene fluoride （PVDF） as a backing, multi-walled carbon nanotubes （MWCNT） and graphene nanoplatelets （GNS） as conductive mediums. The effects of the content of conductive medium on the conductivities and PTC properties of composite materials were studied by impedance test and microscopic analysis. The results show that the conductivities of GNS/PVDF and MWCNT/PVDF composites both increase with the increasing of the conductive medium content. In comparison, MWCNT/PVDF composites possess a better affinity and a higher PTC intensity. As the mass fraction of the conductive medium increases, the PTC intensity of MWCNT/PVDF composites first increases and then decreases, reaching its maximum value of 4.0 when the mass fraction of MWCNT is 2.5%

关 键 词：MWCNT PVDF GNS PVDF 流延法 电导率 PTC强度 亲和性 

分 类 号：TB332[一般工业技术—材料科学与工程]