PTFE surface modification by Ar plasma and its characterization
PTFE surface modification by Ar plasma and its characterization
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DOI：
10.1016/j.vacuum.2011.07.015
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发表时间：
2012-01-27
期刊：
影响因子：
4
通讯作者：
Svorcik, V.
中科院分区：
文献类型：
--
作者：
Kolska, Z.;Reznickova, A.;Svorcik, V.
采用氩等离子体对聚四氟乙烯（PTFE）进行放电处理，研究了不同处理方法对PTFE表面性质的影响。等离子体改性PTFE的表面润湿性和老化是由标准测角法测量的接触角导出的。通过SurPASS仪器测定动电位（c-电位）。zeta电位和接触角表征PTFE表面的“化学性质”，并且还使得可以在等离子体处理之后跟踪PTFE表面的老化。用原子力显微镜（AFM）检测表面形貌和粗糙度。元素的表面浓度由X射线光电子能谱（ARXPS）测定。随着等离子体处理时间的增加，改性PTFE的接触角减小。等离子体改性PTFE在老化过程中接触角增大。在等离子体处理后，观察到PTFE表面形貌和粗糙度的显著变化。还观察到zeta电位的显著增加，这表明与原始PTFE相比，改性PTFE的表面更亲水。随着等离子体处理时间的增加，聚合物表面层中的总氧含量增加。(C)2011爱思唯尔有限公司保留所有权利。
Polytetrafluoroethylene (PTFE) samples were exposed to argon plasma discharge and the changes of the PTFE surface properties were studied by different methods. Surface wettability and aging of the plasma modified PTFE were derived from the contact angle measured by standard goniometry. Electrokinetical potential (c-potential) was determined by SurPASS Instrument. The zeta-potential and the contact angle characterize "chemistry" of the PTFE surface and also make possible to follow the aging of the PTFE surface after the plasma treatment. The surface morphology and roughness were examined by Atomic Force Microscopy (AFM). Surface concentrations of elements were determined by X-ray photoelectron spectroscopy (ARXPS). The contact angle of the modified PTFE decreases with increasing time of the plasma treatment. During the aging of the plasma modified PTFE the contact angle increases. After the plasma treatment dramatic changes in the PTFE surface morphology and roughness were observed. Also a significant increase of zeta-potential is observed, which indicates more hydrophilic surface of the modified PTFE in comparison with pristine one. With increasing time of the plasma treatment the total oxygen content in the polymer surface layer increases. (C) 2011 Elsevier Ltd. All rights reserved.