| Project/Area Number |
15H02841
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental engineering and reduction of environmental burden
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| Research Institution | Kanagawa University |
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Principal Investigator |
Hori Hisao 神奈川大学, 理学部, 教授 (50357951)
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| Co-Investigator(Kenkyū-buntansha) |
永長 久寛 九州大学, 総合理工学研究院, 教授 (90356593)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2017: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
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| Keywords | フッ素 / 分解 / ポリマー / 亜臨界水 / 無機化 / 過酸化水素 / 再資源化 / 蛍石 / 環境技術 / 廃棄物再資源化 / 環境材料 / 触媒・化学プロセス / 超臨界水 |
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| Outline of Final Research Achievements |
Fluoropolymers are used in many industrial applications owing to their high chemical and thermal stability and other specific characters. Among these polymers, poly(tetrafluoroethylene) (PTFE)is most frequently used. However, PTFE cannot be processed by melt molding. To overcome this limitation, melt-processable fluoropolymers, typically, poly(vinylidene fluoride)(PVDF) and its related copolymers, have been developed and introduced in industry. In the present work, decompositions of PVDF and related copolymers in subcritical water were investigated with the aim of developing a technique to recover the fluorine component. By use of hydrogen peroxide, these fluoropolymers can be efficiently decomposed to F- and CO2 (i.e., mineralization) at a relatively low temperature (ca. 300 degrees). Addition of stoichiometric Ca(OH)2 to the reactions formed CaF2 well identified by X-ray diffraction spectrometry.
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