The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties
碩士 === 中原大學 === 化學系 === 88 === Abstract Expanded PTFE and PTFE coexist the same physical properties, e.g. low frictional coefficient, high stability against heat, high resistance to chemical reagents, and high electric resistance. However, the hydrophobicity limits its several applica...
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ndltd-TW-088CYCU00650092015-10-13T11:50:52Z http://ndltd.ncl.edu.tw/handle/26716629294830913257 The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties 電漿誘導接枝對ePTFE結構及性質變化之研究 Chih Wei Chen 陳志瑋 碩士 中原大學 化學系 88 Abstract Expanded PTFE and PTFE coexist the same physical properties, e.g. low frictional coefficient, high stability against heat, high resistance to chemical reagents, and high electric resistance. However, the hydrophobicity limits its several application. To improve its surface property, many methods have been employed, e.g. treatment with high-energy irradiation, ozone, corona discharge and plasma. Among them, the “Plasma Surface Modification” has the advantages of safe, effective, low pollution and so on. There are several differences between expanded PTFE and PTFE. For example, ePTFE was constituted with nodes and fibers, and the average pore size of the ePTFE sheet is 1 µm. The surface modifications of ePTFE sheet have been accomplished with C2H4, CO2 and Ar microwave plasma treatment to improve its hydrophilicity. And the modified ePTFE were then characterized by a combination of attenuated total reflection Fourieer transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), electron spectroscopy for chemical analysis (ESCA), static contact angle measurement and dynamic contact angle measurement with Wilhelmy Plate Method. The results of ESCA showed that all the C2H4, CO2 and Ar microwave plasma were able to activate the surface of the ePTFE sheet, and the sheet was modified after graft polymerization with acrylic acid (AAc). Under the similar plasma pretreatment condition, it was found that the C2H4 plasma treatment gave a better value of [O]/[C] and [F]/[C] ratio. SEM observations revealed that the morphology of the ePTFE sheet changed with grafting time both on the surface and the cross-section nearby the surface. The data obtained from the plasma modified ePTFE show that the hydrophilicity of ePTFE sheet were improved by static contact angle measurement and Wilhelmy Plate Method. Y. W. Chen-Yang 陳玉惠 2000 學位論文 ; thesis 0 zh-TW |
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碩士 === 中原大學 === 化學系 === 88 === Abstract
Expanded PTFE and PTFE coexist the same physical properties, e.g. low frictional coefficient, high stability against heat, high resistance to chemical reagents, and high electric resistance. However, the hydrophobicity limits its several application. To improve its surface property, many methods have been employed, e.g. treatment with high-energy irradiation, ozone, corona discharge and plasma. Among them, the “Plasma Surface Modification” has the advantages of safe, effective, low pollution and so on. There are several differences between expanded PTFE and PTFE. For example, ePTFE was constituted with nodes and fibers, and the average pore size of the ePTFE sheet is 1 µm.
The surface modifications of ePTFE sheet have been accomplished with C2H4, CO2 and Ar microwave plasma treatment to improve its hydrophilicity. And the modified ePTFE were then characterized by a combination of attenuated total reflection Fourieer transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), electron spectroscopy for chemical analysis (ESCA), static contact angle measurement and dynamic contact angle measurement with Wilhelmy Plate Method.
The results of ESCA showed that all the C2H4, CO2 and Ar microwave plasma were able to activate the surface of the ePTFE sheet, and the sheet was modified after graft polymerization with acrylic acid (AAc). Under the similar plasma pretreatment condition, it was found that the C2H4 plasma treatment gave a better value of [O]/[C] and [F]/[C] ratio. SEM observations revealed that the morphology of the ePTFE sheet changed with grafting time both on the surface and the cross-section nearby the surface. The data obtained from the plasma modified ePTFE show that the hydrophilicity of ePTFE sheet were improved by static contact angle measurement and Wilhelmy Plate Method.
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author2 |
Y. W. Chen-Yang |
author_facet |
Y. W. Chen-Yang Chih Wei Chen 陳志瑋 |
author |
Chih Wei Chen 陳志瑋 |
spellingShingle |
Chih Wei Chen 陳志瑋 The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties |
author_sort |
Chih Wei Chen |
title |
The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties |
title_short |
The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties |
title_full |
The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties |
title_fullStr |
The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties |
title_full_unstemmed |
The Study of Plasma Induced Graft Polymerization to the Changes of ePTFE''s Structure and Properties |
title_sort |
study of plasma induced graft polymerization to the changes of eptfe''s structure and properties |
publishDate |
2000 |
url |
http://ndltd.ncl.edu.tw/handle/26716629294830913257 |
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