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Study on Carbon Paper Modifying with Fluorinated Mesophase Pitch
Received:December 30, 2020  
DOI:10.11980/j.issn.0254-508X.2021.05.007
Key Words:carbon paper  hydrophobic modification  fluorinated pitch
Fund Project:国家重点研发计划项目(编号:2017YFB0308200)。
Author NameAffiliationPostcode
LI Mengjia School of Materials Science and EngineeringTiangong University Tianjin 300387 300387
MA Wenjun School of Materials Science and EngineeringTiangong University Tianjin 300387 300387
HUA Feiguo Zhejiang Jinchang Special Paper Co. Ltd. Quzhou Zhejiang Province 324400 324400
XU Yue China National Pulp and Paper Research Institute Co. Ltd. Beijing 100102 100102
LI Qiqi School of Materials Science and EngineeringTiangong University Tianjin 300387 300387
MA Chang School of Materials Science and EngineeringTiangong University Tianjin 300387 300387
TONG Shuhua Zhejiang Jinchang Special Paper Co. Ltd. Quzhou Zhejiang Province 324400 324400
SHI Jingli School of Materials Science and EngineeringTiangong University Tianjin 300387 300387
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Abstract:Using fluorinated mesophase pitch as additive, the carbon paper was hydrophobically modified by impregnation on vapor deposition process. The effects of two fluorinated mesophase pitch loading processes and loading amount on the microscopic morphology, thickness, apparent density, electrical conductivity and hydrophobic properties of carbon paper were investigated. The results showed that the modified carbon paper by impregnation had better hydrophobic properties than that by vapor deposition, and the corresponding property parameters were also changed. As the loading of fluorinated mesophase pitch increased, the thickness of the carbon paper increased, the apparent density decreased, the resistivity increased, and the contact angle increased. When the loading of fluorinated mesophase pitch was 10 wt%, the resistivity of the carbon paper obtained by impregnation was 5.6 mΩ·cm, with contact angle of 139°, which met the requirements of the gas diffusion layer in fuel cells.
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