Argon plasma treatment-induced grafting of acrylic acid onto expanded poly(tetrafluoroethylene) membranes
Argon plasma treatment-induced grafting of acrylic acid onto expanded poly(tetrafluoroethylene) membranes
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DOI：
10.1016/j.polymer.2013.10.003
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发表时间：
2013-11-14
期刊：
影响因子：
4.6
通讯作者：
Grondahl, Lisbeth
中科院分区：
文献类型：
--
作者：
Hidzir, Norsyahidah Mohd;Hill, David J. T.;Grondahl, Lisbeth
膨体聚四氟乙烯 (ePTFE) 用于面部重建手术。对于某些特定应用，需要 ePTFE 与下面的骨骼连接。然而，ePTFE 被归类为生物惰性，因此限制了骨组织界面的整合。在当前的研究中，使用氩等离子体处理诱导丙烯酸（AA）接枝来提高集成度，从而将官能团掺入到 ePTFE 表面上。实现了高表面覆盖率（XPS 接枝程度高达 90%），并产生高亲水性和高吸水率（高达接枝 PAA 质量的 470%）。在本研究中，通过观察到带电物质与中性物质发挥同样重要的作用，评估了等离子体中存在的物质对 ePTFE 表面官能团结合的贡献。评估了等离子体室中样品位置的影响以及接枝参数（等离子体功率、单体浓度和反应时间）对接枝结果的影响。评估了 AA 接枝膜在拉伸、压缩和纳米压痕下的机械性能。 (C) 2013 Elsevier Ltd. 保留所有权利。
Expanded poly(tetrafluoroethylene) (ePTFE) is used in facial reconstruction surgery. For some specific applications ePTFE is required to interface with the underlying bone. However, ePTFE is classified as bioinert thus limiting integration at the bone-tissue interface. The incorporation of functional groups onto the ePTFE surface was carried out in the current study using argon plasma treatment-induced grafting of acrylic acid (AA) to improve integration. High surface coverage (grafting extent from XPS of up to 90%) was achieved and resulted in high hydrophilicity and high water uptake (up to 470% of the grafted PAA mass). The contribution of species present in the plasma to the incorporation of functional groups onto the ePTFE surface was evaluated with charged species observed to play an equally important role to neutral species in this study. The effects of sample position in the plasma chamber as well as the effect of grafting parameters (plasma power, monomer concentration, and reaction time) on the grafting outcome were evaluated. The mechanical properties of the AA grafted membranes under tensile, compression and nanoindentation were evaluated. (C) 2013 Elsevier Ltd. All rights reserved.