中国塑料 ›› 2022, Vol. 36 ›› Issue (2): 41-48.DOI: 10.19491/j.issn.1001-9278.2022.02.007

• 材料与性能 • 上一篇    下一篇

聚偏氟乙烯/类基体基团修饰石墨烯导热复合材料研究

何明峰1, 王珂1, 王启扬2, 杨肖2, 郭红3(), 胡泊洋3, 李保安3()   

  1. 1.国网浙江省电力有限公司金华供电公司,浙江 金华 321000
    2.南瑞集团有限公司(国网电力科学研究院有限公司),南京 211100
    3.南开大学环境科学与工程学院,天津 300350
  • 收稿日期:2021-08-23 出版日期:2022-02-26 发布日期:2022-02-23
  • 通讯作者: 郭红(1985—),女,助理研究员,从事聚合物基高导热复合材料的设计与制备研究,guohong1218@163.com
    李保安(1963—),男,教授,从事高导热聚合物复合材料制备及化工换热应用研究,libaoan@nankai.edu.cn
    E-mail:guohong1218@163.com;libaoan@nankai.edu.cn;guohong1218@163.com
  • 基金资助:
    国家电网公司科研项目?石墨烯复合材料高效蓄冰装置关键技术研究与工程示范(5419?202019385A?0?0?00)

Study on polyvinylidene fluoride/matrix⁃like groups⁃modified graphene composites with high thermal conductivity

HE Mingfeng1, WANG Ke1, WANG Qiyang2, YANG Xiao2, GUO Hong3(), HU Boyang3, LI Baoan3()   

  1. 1.State Grid Zhejiang Electric Power Company Jinhua Power Supply Company,Jinhua 321000,China
    2.NARI Group Corporation (State Grid Electric Power Research Institute),Nanjing 211100,China
    3.College of Environmental Science and Engineering,Nankai University,Tianjin 300350,China
  • Received:2021-08-23 Online:2022-02-26 Published:2022-02-23
  • Contact: GUO Hong, LI Baoan E-mail:guohong1218@163.com;libaoan@nankai.edu.cn;guohong1218@163.com

摘要:

采用含类基体基团的乙烯基三甲氧基硅烷修饰氧化石墨烯(GO),再用“一锅法”将其还原得到功能化石墨烯(F?GE),通过溶剂浇注法制备出界面性能优良的聚偏氟乙烯导热复合材料(PVDF/F?GE)。利用红外光谱仪(FTIR)、扫描电子显微镜(SEM)、热导率测试仪、电子拉力试验机对复合材料的改性状态、微观形貌、导热性能和力学性能等进行了分析表征。结果表明,类基体基团修饰后的石墨烯分散性大幅度提高,且与基体PVDF之间的相容性也得到明显改善,显著增强了PVDF复合材料的热稳定性、拉伸强度和导热性能;当F?GE含量为20 %(质量分数,下同)时,PVDF/F?GE体系的热导率达到2.08 W/(m·K),比纯PVDF的0.22 W/(m·K)提高了845 %,而聚偏氟乙烯/未改性石墨烯(PVDF/GE)体系热导率为1.12 W/(m·K),仅比纯PVDF提高了409 %;同时,PVDF/F?GE复合材料可保持较好的力学性能和热稳定性,其拉伸强度可达112.6 MPa,而熔点和热分解温度分别为171.3 ℃和471 ℃,分别比纯PVDF提升了5.5 ℃和7 ℃。

关键词: 石墨烯, 聚偏氟乙烯, 导热性能, 力学性能, 复合材料

Abstract:

Graphene oxide was modified with vinyl trimethoxysilane containing matrix?like groups, and then functionalized graphene (F?GE) was reduced through a one?pan method. The thermal conductive polyvinylidene fluoride (PVDF)/F?GE composites with excellent interface properties were prepared using a solvent?casting method. The modified state, microstructure, thermal conductivity, and mechanical properties of the obtained composites were investigated using infrared spectrometer, scanning electron microscope, thermal conductivity tester, and electronic tensile testing machine. The results indicated that the dispersibility of the F?GE was enhanced greatly, and its compatibility with the PVDF matrix was improved significantly. The thermal stability, tensile strength, and thermal conductivity of the composites were significantly increased. When the content of F?GE was 20 %, the composite achieved a thermal conductivity 2.08 W/(m·K), which was 845 % higher than that of pure PVDF [0.22 W/(m·K)]. However, the PVDF/GE composite only showed an increase in thermal conductivity by 409 %. Meanwhile, the composites maintained good mechanical properties and thermal stability, and their tensile strength reached 112.6 MPa. The composites also exhibited a melting point of 171.3 ℃ and a thermal decomposition temperature of 471 ℃, which were higher than pure PVDF by 5.5 ℃ and 7 ℃, respectively.

Key words: graphene, polyvinylidene fluoride, thermal conductivity, mechanical property, composite material

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