1999 Fiscal Year Final Research Report Summary
Function Enhancement of Polymer Pipe Internal Wall by RF Plasma
Project/Area Number |
10650028
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
表面界面物性
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Research Institution | Kanagawa Institute of Technology |
Principal Investigator |
SHIMOKAWA Hirofumi Kanagawa Institute of Technology, Department of Electrical and Electronic Engineering, Professor, 工学部, 教授 (50144126)
|
Project Period (FY) |
1998 – 1999
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Keywords | Neutral Activated Species / Streaming Electrification / Electric Double Layer / Surface Modification / Surfactant / Insulating Liquid |
Research Abstract |
Surface modification of polymer pipes using RF plasma was introduced, and the streaming electrification in polymer pipes was investigated for pure water or insulating liquid. The inner wall surface of low density polyethylene (LDPE) pipe or polytetrafluoroethylene (PTFE) pipe was treated in OィイD22ィエD2, NィイD22ィエD2 and CFィイD24ィエD2 plasma. The salient results are summarized as follows : (1) It is difficult to control the streaming current of water in LDPE pipe by the treatment in OィイD22ィエD2 or NィイD22ィエD2 plasma. The steaming electrification of water in the polymer pipe is mainly subject to the electrostatic induction by charges on the internal wall surface. (2) The steaming current of distilled silicone liquid decreases on about one digit by OィイD22ィエD2 or NィイD22ィエD2 plasma treatment, but does not decrease by CFィイD24ィエD2 plasma treatment. (3) By adding a surfactant in the silicone liquid, the state of a electric double layer between the polymer and the liquid is controlled. The steaming current of solution of a anionic surfactant in the silicone liquid increases by CFィイD24ィエD2 plasma treatment at the about two digits, and increases on about one digit by OィイD22ィエD2 or NィイD22ィエD2 plasma treatment. (4) The steaming current is little dependant on the frequency of plasma treatment (DC, 20kHz and 13.56MHz). (5) It is indicated from these results that the structure of electric double layer depends on the gas plasma used the surface treatment.
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