Surface Functionalization of a Polyurethane Surface via Radio-Frequency Cold Plasma Treatment Using Different Gases
Surface Functionalization of a Polyurethane Surface via Radio-Frequency Cold Plasma Treatment Using Different Gases
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DOI：
10.3390/coatings10111067
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发表时间：
2020-11-01
期刊：
影响因子：
3.4
通讯作者：
Popelka, Anton
中科院分区：
文献类型：
--
作者：
E. Abusrafa, Aya;Habib, Salma;Popelka, Anton
本文测试了空气、O-2、N-2、Ar及其混合物对聚氨酯（PU）薄膜的表面处理。该处理是为了在聚合物表面加入新的极性功能，并获得改进的亲水特性。对PU膜进行射频低温等离子体处理。结果表明，等离子体处理大大提高了PU膜的亲水性；在空气等离子体存在下，处理时间为180 s，标称功率为80 W时，PU样品的等离子体效应最大。由于气体介质的反应性，表面形貌也随着等离子体暴露时间和使用的气体类型而变化。粗糙度分析表明，在较高的处理次数下，表面的蚀刻/降解变得更加明显。表面化学研究表明，在暴露于O-2、N-2、空气和Ar时，表面上的O-2和N-2元素群增加。此外，老化研究表明，在空气和Ar存在下处理的样品在接触角和剥离测试测量方面比其他气体处理的样品更稳定。
Herein, the surface treatment of polyurethane (PU) films via air, O-2, N-2, Ar, and their mixtures were tested. The treatment was performed to incorporate new polar functionalities on the polymer surface and achieve improved hydrophilic characteristics. The PU films were subjected to RF low-temperature plasma treatment. It was found that plasma treatment immensely enhanced the hydrophilic surface properties of the PU films in comparison with those of the pristine samples; the maximum plasma effect occurred for the PU sample in the presence of air plasma with treatment time of 180 s at nominal power of 80 W. The surface topography was also found to vary with plasma exposure time and the type of gas being used due to the reactivity of the gaseous media. Roughness analysis revealed that at higher treatment times, the etching/degradation of the surface became more pronounced. Surface chemistry studies revealed increased O-2 and N-2 elemental groups on the surface upon exposure to O-2, N-2, air, and Ar. Additionally, the aging study revealed that samples treated in the presence of air and Ar were more stable in comparison to those of the other gases for both the contact angle and peel test measurements.