1989 Fiscal Year Final Research Report Summary
Surface Modification of Graphite Whisker for Composite Materials by Plasma
| Project/Area Number |
63850021
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| Research Category |
Grant-in-Aid for Developmental Scientific Research
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| Allocation Type | Single-year Grants |
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| Research Field |
機械材料工学
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| Research Institution | Shizuoka University |
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Principal Investigator |
INAGAKI Norihiro Shizuoka University Fac. of Engn. Professor, 工学部, 教授 (30022015)
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| Co-Investigator(Kenkyū-buntansha) |
HARADA Minoru Nikkiso Co. Researcher, 研究員
TASAKA Shigeru Shizuoka University Fac. of Engn. Assist. Professor, 工学部, 助教授 (10134793)
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| Project Period (FY) |
1988 – 1989
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| Keywords | Graphite wisker / Plasma treatment / Composite materials / Hydrophilicity / Surface energy / Nitro compounds / XPS / Fluidization |
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| Research Abstract |
The objective in this project is the application of plasma polymerization and plasma treatment for hydrophilic surface modification of graphite whiskers. The results are summarized as follows.
1. The exposure to plasma of oxygen- or nitrogen-containing compounds leads to hydrophilic surfaces. 2. Nitro compounds such as nitromethane are suitable starting materials for preparation of hydrophilic plasma polymers. Nitrogen oxides such as NO and NO_2 are suitable gases for hydrophilic surface modification by means of plasma treatment. 3. The functional groups introduced onto surfaces by the plasma treatment, which contribute to hydrophilicity, are hydroxyl, carbonyl, and carboxyl groups. 4. The concentration of the functional groups generated onto the surface is closely related to the hydrophilicity of the treated surface. 5. The NO- and NO_2-plasma oxidize the surface of graphite whiskers and make them hydrophilic. 6. Carbonyl and carboxyl groups are introduced onto the whisker surfaces by NO-plasma exposure, and their concentration is about five times more than that of the graphite treated with hot HNO_3.
In conclusion, the NO- or NO_2-plasma treatment is a distinguished technique for hydrophilic modification of graphite whisker.
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