孙晶

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教授

硕士生导师

主要任职:伯川书院执行院长

其他任职:机械工程国家级实验教学示范中心主任

性别:女

毕业院校:大连理工大学

学位:博士

所在单位:机械工程学院

学科:机械制造及其自动化

办公地点:大连理工大学知方楼7009房间

联系方式:13516059116

电子邮箱:sunjing@dlut.edu.cn

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Simultaneous and long-lasting hydrophilization of inner and outer wall surfaces of polytetrafluoroethylene tubes by transferring atmospheric pressure plasmas

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论文类型:期刊论文

发表时间:2016-09-14

发表刊物:JOURNAL OF PHYSICS D-APPLIED PHYSICS

收录刊物:SCIE、EI、Scopus

卷号:49

期号:36

ISSN号:0022-3727

关键字:atmospheric pressure plasma; plasma jet; hydrophilization; wettability; tube; surface modification

摘要:Plasma hydrophilization is a general method to increase the surface free energy of materials. However, only a few works about plasma modification focus on the hydrophilization of tube inner and outer walls. In this paper, we realize simultaneous and long-lasting plasma hydrophilization on the inner and outer walls of polytetrafluoroethylene (PTFE) tubes by atmospheric pressure plasmas (APPs). Specifically, an Ar atmospheric pressure plasma jet (APPJ) is used to modify the PTFE tube's outer wall and meanwhile to induce transferred He APP inside the PTFE tube to modify its inner wall surface. The optical emission spectrum (OES) shows that the plasmas contain many chemically active species, which are known as enablers for various applications. Water contact angle (WCA) measurements, x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) are used to characterize the plasma hydrophilization. Results demonstrate that the wettability of the tube walls are well improved due to the replacement of the surface fluorine by oxygen and the change of surface roughness. The obtained hydrophilicity decreases slowly during more than 180 d aging, indicating a long-lasting hydrophilization. The results presented here clearly demonstrate the great potential of transferring APPs for surface modification of the tube's inner and outer walls simultaneously.