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| Study on Preparation of Carbon Paper for Proton Exchange Membrane Fuel Cell by Amphiphilic Modified Carbon Fibers |
| Received:November 20, 2019 |
| DOI：10.11980/j.issn.0254-508X.2020.03.003 |
| Key Words:carbon fiber modification amphiphilic carbon fiber carbon paper high conductivity |
| Fund Project:国家重点研发计划项目（2017YFB0308200）。 |
| Author Name | Affiliation | Postcode | | HU Rongrong | School of Materials Science and Engineering, Tiangong University,Tianjin,300387 | 300387 | | LI Mengjia | School of Materials Science and Engineering, Tiangong 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 | | WANG Yali | School of Materials Science and Engineering, Tiangong University,Tianjin,300387 | 300387 | | MA Wenjun | School of Materials Science and Engineering, Tiangong University,Tianjin,300387 | 300387 | | GE Zhenya | School of Materials Science and Engineering, Tiangong University,Tianjin,300387 | 300387 | | MA Chang | School of Materials Science and Engineering, Tiangong University,Tianjin,300387 | 300387 | | TONG Shuhua | Zhejiang Jinchang Special Paper Co., Ltd.,Quzhou,Zhejiang Province,324400 | 324400 | | SHI Jingli | School of Materials Science and Engineering, Tiangong University,Tianjin,300387 | 300387 |
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| Abstract:In order to improve the dispersibility of short carbon fibers in water and the compatibility of the carbon fibers with the impregnating resin, the carbon fibers were subjected to multiple surface treatments. Firstly, some hydrophilic groups were treated on the surface of carbon fibers by oxidation treatment. Furthermore, the carbon fibers grafted lipophilic functional groups with part of hydrophilic functional groups, obtained the amphiphilic modified carbon fiber and carbon paper. The results showed that the surface of amphiphilic carbon fibers had the hydroxyl content of 8.2%. In the process of carbon fiber surface modification, chromic acid oxidation increased the hydrophilic group on the surface of carbon fiber while reduced the tensile strength of carbon papers. The lipophilic functional groups were beneficial to the bonding between carbon fibers and the resin. The improvement of bonding strength partially compensated for the negative effects caused by the oxidation surface treatment. The adhesion between the carbon fibers and the resins was favorable for the conductivity of the amphiphilic modification carbon papers. The resistivity was reduced by 31.4% compare to untreated carbon paper,and reached to 10.5 mΩ·cm. |
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