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Novel perfluoropolyethers as fouling-release coatings.

机译：新型全氟聚醚作为防污涂料。

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摘要

Perfluoropolyethers (PFPE's) and copolymers exhibit low surface tensions, low moduli and excellent thermal and chemical stabilities, which make them promising candidates as fouling-release coating materials. The objectives of this research primarily involve functionalizing PFPE precursors to form reactive macromonomers which can be photochemically crosslinked to form elastomer materials. To explore structure/property relationships, different functional endgroups such as methacrylate and styrene were used to modify PFPE telechelic diols of variable molecular weights to yield crosslinkable difunctional PFPE macromonomers. The method allows for control of the crosslink density of crosslinked PFPE elastomer materials via UV curing, which can provide materials with different mechanical and surface properties.;These difunctional PFPE's were incorporated into hydrophilic dimethacrylate-functionalized poly(ethylene glycol) (PEG-DMA) to form amphiphilic networks via UV curing. These network materials varied from optically transparent to opaque as a function of molecular weight and composition ratio. The different solubility of these two components resulted in the amphiphilic materials with microphase to macrophase separation. Strong inhibition of non-specific protein adsorption could be achieved with these network materials compared with an oligo(ethylene glycol)-based self-assembled monolayer coated surface.;Multifunctional PFPE macromonomer was obtained via the modification of PFPE tetrol precursor with methacrylate endgroups. In order to achieve durable PFPE elastomer materials, fluorinated difunctional crosslinker was incorporated and copolymerized with the PFPE macromonomer to further increase crosslink density. The partial incompatibility of the two components resulted in samples with microphase separation. This fundamental research helps both to understand the compatibility and miscibility behavior of fluorinated components and to optimize the design of perfluorinated systems for obtaining enhanced mechanically durable materials as long-term fouling-release coatings.
机译：全氟聚醚（PFPE's）和共聚物表现出低表面张力，低模量以及出色的热稳定性和化学稳定性，这使其有希望成为结垢释放涂料的候选材料。这项研究的目标主要涉及功能化PFPE前体以形成反应性大分子单体，可以将其光化学交联以形成弹性体材料。为了探索结构/性质的关系，使用不同的官能端基（例如甲基丙烯酸酯和苯乙烯）来修饰分子量可变的PFPE远螯二醇，以生成可交联的双官能PFPE大分子单体。该方法可以通过UV固化控制交联PFPE弹性体材料的交联密度，从而可以提供具有不同机械性能和表面性能的材料;这些双官能PFPE被掺入亲水性的二甲基丙烯酸酯官能化的聚乙二醇（PEG-DMA）中通过紫外线固化形成两亲网络。这些网络材料根据分子量和组成比的不同，从光学透明到不透明。这两种组分的不同溶解度导致两亲材料具有从微相到大相的分离。与基于低聚乙二醇的自组装单层涂层表面相比，这些网络材料可实现对非特异性蛋白质吸附的强抑制作用。；通过用甲基丙烯酸酯端基修饰PFPE戊四醇前体，获得了多功能PFPE大分子单体。为了获得耐用的PFPE弹性体材料，掺入了氟化双官能交联剂并与PFPE大分子单体共聚，以进一步提高交联密度。这两种成分的部分不相容性导致样品发生微相分离。这项基础研究不仅有助于了解含氟组分的相容性和可混溶性，而且有助于优化全氟化体系的设计，从而获得增强的机械耐用材料作为长期的防污涂料。

著录项

  • 作者

    Hu, Zhaokang.;

  • 作者单位

    The University of North Carolina at Chapel Hill.;

  • 授予单位 The University of North Carolina at Chapel Hill.;
  • 学科 Chemistry Polymer.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 164 p.
  • 总页数 164
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化学（高聚物）;
  • 关键词

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