中国塑料 ›› 2021, Vol. 35 ›› Issue (7): 25-31.DOI: 10.19491/j.issn.1001-9278.2021.07.004

• 材料与性能 • 上一篇    下一篇

碳纳米管分散强化PVDF复合薄膜导热性能探究

吴朝廷1,2, 陈华艳1,2(), 张文欣1,3, 吕晓龙1,2   

  1. 1.省部共建分离膜与膜过程国家重点实验室,天津 300387
    2.天津工业大学材料科学与工程学院,天津 300387
    3.天津工业大学环境科学与工程学院,天津 300387
  • 收稿日期:2021-02-01 出版日期:2021-07-26 发布日期:2021-07-21
  • 基金资助:
    天津市自然科学基金项目(17JCYBJC17400)

Study on Thermal Conductivity of Carbon Nanotube Dispersion Strengthened PVDF Composite Film

WU Chaoting1,2, CHEN Huayan1,2(), ZHANG Wenxin1,3, LYU Xiaolong1,2   

  1. 1.State key Laboratory of Separation Membranes and Membrane Processes,Tianjin 300387,China
    2.School of Materials Science and Engineering,Tiangong University,Tianjin 300387,China
    3.School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China
  • Received:2021-02-01 Online:2021-07-26 Published:2021-07-21
  • Contact: CHEN Huayan E-mail:chenhuayan@tjpu.edu.cn

摘要:

采用多巴胺(DA)和3?氨基丙基?三甲氧基硅烷(APTMS)对碳纳米管(CNTs)进行DA辅助共修饰,并用溶剂浇铸法制备具有优异热性能和力学性能的聚偏氟乙烯(PVDF)复合薄膜;采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、差示扫描量热仪(DSC)、X射线光电子能谱仪(XPS)、热常数分析仪和电子单纱强力仪等对材料的微观形貌、结晶度、导热性能和力学性能进行了表征。结果表明,经DA和APTMS共修饰后的PDA?CNTs?NH2具有良好的分散性能;PDA?CNTs?NH2的加入,有利于改善PVDF复合薄膜的热稳定性;与纯PVDF薄膜和PVDF/CNTs复合薄膜相比,PVDF/PDA?CNTs?NH2复合薄膜的导热性能和力学性能显著增强,在8 %(质量分数,下同) PDA?CNTs?NH2的填料负载下,其热导率达到0.337 9 W/(m·K),是纯PVDF薄膜的1.78倍,其拉伸强度为52.67 MPa,是纯PVDF复合薄膜的1.36倍。

关键词: 聚偏氟乙烯, 复合薄膜, 分散性, 热导率, 力学性能

Abstract:

Carbon nanotubes (CNTs) were modified with dopamine (DA) and 3?aminopropyl?trimethoxysilane (APTMS),and then a solvent casting method was used to prepare poly(vinylidene fluoride) (PVDF) composite films with excellent thermomechanical properties. The microscopic morphology, crystallinity, thermal properties and mechanical properties were characterized by means of scanning electron microscope, transmission electron microscope, differential scanning calorimeter, X?ray photoelectron spectrometer, thermal constant analyzer, and electronic single yarn strength meter. The results indicated that the DA?APTMS?co?decorated CNTs (PDA?CNTs?NH2) exhibited good dispersion properties. The addition of PDA?CNTs?NH2 was benefical to improve the thermal stability of PVDF composite films. The thermal conductivity and mechanical properties of the PVDF/PDA?CNTs?NH2 composite films were significantly enhanced compared to the pure PVDF and PVDF/CNTs composite films. Under a loading of 8 wt.% PDA?CNTs?NH2 filler, the composite films achieved a thermal conductivity of 0.337 9 W/(m·K) and tensile strength of 52.67 MPa, increasing by 78 % and 36 % compared to pure PVDF film, respectively.

Key words: poly(vinylidene fluoride), composite film, dispersion, thermal conductivity, mechanical property

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