Triolo P M, Andrade J D
J Biomed Mater Res. 1983 Jan;17(1):149-65. doi: 10.1002/jbm.820170112.
The effects of the modification of polystyrene (PS), polyethylene (PE), poly(vinyl chloride) (PVC), silicone rubber (SR), and fluorinated ethylene propylene (FEP) copolymer by radio frequency glow discharge in a helium environment were presented in part I. The hydrated polymer surfaces were characterized by XPS, SEM, visual microscopy, and by contact angle measurements. In general, exposure of the polymers to RFGD produced an oxidized hydrophilic surface, yet the roughness of the surface was unaltered by the relatively mild plasma conditions used. In this article, the frictional behavior of oxidized and unoxidized SR, PE, and FEP in distilled water, isotonic saline, and blood plasma environments is examined experimentally. The results are discussed in relation to the properties generally believed to affect frictional phenomena and to the surface properties as determined in part I. Results indicate that RFGD-treated SR generates less friction than untreated SR when dragged across all untreated and treated polymer surfaces, whether the medium is distilled water or an isotonic saline solution. Friction is consistently lower in a blood plasma medium between all surfaces investigated, most probably because of the presence of adsorbed proteins at the polymer interfaces.
第一部分介绍了在氦气环境中通过射频辉光放电对聚苯乙烯（PS）、聚乙烯（PE）、聚氯乙烯（PVC）、硅橡胶（SR）和氟化乙烯丙烯（FEP）共聚物进行改性的效果。通过X射线光电子能谱（XPS）、扫描电子显微镜（SEM）、光学显微镜以及接触角测量对水合聚合物表面进行了表征。一般来说，聚合物暴露于射频辉光放电会产生氧化的亲水性表面，但所使用的相对温和的等离子体条件并未改变表面粗糙度。在本文中，对氧化和未氧化的SR、PE和FEP在蒸馏水、等渗盐水和血浆环境中的摩擦行为进行了实验研究。结合通常认为会影响摩擦现象的特性以及在第一部分中确定的表面特性对结果进行了讨论。结果表明，当在所有未处理和处理过的聚合物表面拖动时，经射频辉光放电处理的SR产生的摩擦力比未处理的SR小，无论介质是蒸馏水还是等渗盐溶液。在所研究的所有表面之间，血浆介质中的摩擦力始终较低，这很可能是因为聚合物界面处存在吸附的蛋白质。
