PDF(Pubmed)
Abstract：
This study continues the discussion on the surface modification of polymers using an atmospheric pressure plasma (APP) reactor in air. These results complement prior research focusing on nonpolar polymers. Polymers, such as polyethylene terephthalate, polyetheretherketone, and polymethyl methacrylate, containing structurally bonded oxygen are studied, representing a range of properties such as oxygen content, crystalline/amorphous structure, polarity, functionality, and aliphatic/aromatic structure. APP induces superior wetting properties on the hydrophilic polymer surfaces with rapid and uniform modification within 0.5 s of exposure. The amorphous structures undergo additional modification for longer exposure. Moreover, the aliphatic chain structures require longer plasma exposure to reach surface modification equilibrium. The polar polymers reach a limit level of modification corresponding to a minimum water contact angle of about 50°. The surface polarity increases on average by a factor of approximately two. The equilibrium values of the adhesion work attained after post-processing recovery fall within a limited range of about 100-120 mJ/m2. The enhancement of surface functionality through the creation of oxidized groups primarily depends on the initial oxygen content and reaches a limit of about 40 at.% oxygen. The surface properties of the treated polar surfaces exhibit good stability, comparable to that of the previously tested nonpolar polymers.
摘要：
这项研究继续讨论使用大气压等离子体（APP）反应器在空气中对聚合物进行表面改性。这些结果补充了以前关注非极性聚合物的研究。聚合物,如聚对苯二甲酸乙二醇酯，聚醚醚酮,和聚甲基丙烯酸甲酯，研究了含有结构键合的氧，代表一系列属性，如氧含量，结晶/无定形结构，极性,功能，和脂族/芳族结构。APP在亲水性聚合物表面上诱导优异的润湿性能，并在暴露0.5s内进行快速均匀的改性。非晶结构经历额外的修改以用于更长的曝光。此外，脂族链结构需要更长的等离子体暴露才能达到表面改性平衡。极性聚合物达到对应于约50°的最小水接触角的改性极限水平。表面极性平均增加大约2倍。在后处理恢复之后获得的粘附功的平衡值落在约100-120mJ/m2的有限范围内。通过产生氧化基团的表面官能度的增强主要取决于初始氧含量，并达到约40at。%氧气。经处理的极性表面的表面性能表现出良好的稳定性，与以前测试的非极性聚合物相当。
