远程氧等离子体改性聚四氟乙烯表面润湿性与表面结构的研究

刘红霞 1; 2; 张慧君 1; 陈杰瑢 1

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远程氧等离子体改性聚四氟乙烯表面润湿性与表面结构的研究

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- 远程氧等离子体改性聚四氟乙烯表面润湿性与表面结构的研究
- Surface Wettability and Surface Structure of Remote O₂ Plasma Treated Poly(Tetrafluoroethylene)
- 西安交通大学学报 2010年44卷第3期页码：120-125
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
  
  : 2009-10-12. 作者简介:刘红霞(1972—),女,博士,讲师. 基金项目:国家自然科学基金资助项目(30571636);高等学校博士学科点专项科研基金资助项目(20060698002);2009年西安交通大学校内科研基金资助项目
- DOI：
  中图分类号： O631
- 网络首发：2010-03-10，
  
  纸质出版：2010
- 稿件说明：
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刘红霞 1, 2, 张慧君 1, 等. 远程氧等离子体改性聚四氟乙烯表面润湿性与表面结构的研究[J]. 西安交通大学学报, 2010,44(3):120-125.

Surface Wettability and Surface Structure of Remote O₂ Plasma Treated Poly(Tetrafluoroethylene)[J]. 2010, 44(3): 120-125.
刘红霞 1, 2, 张慧君 1, 等. 远程氧等离子体改性聚四氟乙烯表面润湿性与表面结构的研究[J]. 西安交通大学学报, 2010,44(3):120-125. DOI：

Surface Wettability and Surface Structure of Remote O₂ Plasma Treated Poly(Tetrafluoroethylene)[J]. 2010, 44(3): 120-125. DOI：

摘要

研究了远程氧等离子体改性聚四氟乙烯(PTFE)的表面润湿性与表面结构的关系.用已知表面张力的液体测定接触角

采用Zisman曲线法求得试样的临界表面张力γ

利用扩展的Fowkes公式计算试样表面自由能γ

及其分量γ

(色散力)、γ

(偶极矩力)和γ

(氢键力)的变化

并与远程氧等离子体中活性物种的分布进行相关性分析.结果表明:氧等离子体处理的PTFE表面润湿性是由表面自由能中极性分量(γ

+γ

)

尤其是氢键力γ

的大小决定的

而与表面能态没有特定关系; 氧等离子体场中活性物种混合存在和较纯的高浓度自由基氛围均有利于极性分量(γ

+γ

)的增加

但表面自由能的变化则主要受电子、离子浓度的影响.X射线光电子能谱分析表明

经氧等离子体处理后

PTFE表面C—F键断裂形成的自由基与空气中的氧反应生成C—O 和C=O活性基团

氧含量增大

使表面润湿性提高.

Abstract

The surface wettability and surface structure of poly(tetrafluoroethylene)(PTFE)treated with remote O

plasma were studied. The contact angles of the samples were measured and the critical surface tensions γ

were determined on the basis of the Zisman's plots. The values of the surface free energy γ

and its dispersion force γ

dipole force γ

and hydrogen bonding force γ

were evaluated by the extended Fowkes equation. In addition

the analysis was performed on the re

lation of the distribution of reactive species in remote O

plasma and the surface free energy. The results show that the surface wettability of remote O

plasma treated PTFE is determined only by the polar force(γ

+γ

)

especially by theγ

. A mixed atmosphere constituted by all reactive species or super pure and high free radicals concentration in remote O

plasma facilitates the increase of polar force(γ

+γ

)

but the surface free energy is mainly influenced by the concentration of charged particles. X-ray photoelectron spectroscopy(XPS)indicates that the C—F bonds on the PTFE surface are broken by the O

plasma treatment

and then the C—O and C=O are yielded effectively

leading to a higher surface wettability.

关键词

Keywords

references

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