Functional Polymer Surfaces

功能性聚合物表面

• 批准号: 0207560
• 负责人: Kenneth Wynne
• 金额: --
• 依托单位: Virginia Commonwealth University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-05-01 至 2009-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0207560&HistoricalAwards=false
• 关键词: Functional; Polymer; Surfaces

The theme of this research is the development of a molecular and macromolecular basis for generating desired surface structure and function that avoids post-manufacturing processes such as plasma treatment. To this end, the synthesis and utilization of Dual Function Macromonomers (DFMs) will be carried out. DFMs are difunctional low molar mass copolymers having conventional end groups (e.g., alcohol) and containing (a) semifluorinated sidechains and (b) functional sidechains. It is proposed that semifluorinated "nanoballoons" will bring desired functionality to the surface in operations such as solvent casting or melt processing. Thus, the DFM concept leverages the well-known tendency of fluoropolymer groups to surface-concentrate. However, in so doing, copolymer structure causes functionality that would ordinarily be in the bulk to be brought to the surface. The DFM concept will be applied first to polyurethanes. The plan is to prepare (a) surface active DFMs, (b) PUs incorporating DFM soft blocks, and (c) blends using a conventional polyurethane as major component and DFM PU as minor component. The resulting material properties are controlled at the nanostructure and microstructural levels. The DFM PU is employed for controlling surface function while a conventional bulk PU provides independently controlled mechanical properties. The proposed work focuses on a new and potentially economical method for introducing chemical functionality specifically at the surface of polymeric materials. The proposed control of surface chemistry is anticipated to improve adhesion and durability of manufactured items, to facilitate long-term function of biomedical materials, and to bring into existence new materials for destroying dangerous pathogens on contact.

这项研究的主题是发展分子和大分子基础，以产生所需的表面结构和功能，避免制造后的工艺，如等离子体处理。为此，将进行双功能高分子单体的合成与利用。dfm是双官能团低摩尔质量共聚物，具有常规端基（例如醇），含有(a)半氟侧链和(b)官能团侧链。建议半氟化“纳米气球”将在溶剂铸造或熔体加工等操作中为表面带来所需的功能。因此，DFM概念利用了众所周知的含氟聚合物基团表面浓缩的趋势。然而，在这样做的过程中，共聚物的结构使通常在整体中的功能被带到表面。DFM概念将首先应用于聚氨酯。该计划是制备(a)表面活性DFM， (b)含有DFM软块的PU，以及(c)使用传统聚氨酯作为主要成分，DFM PU作为次要成分的混合物。所得到的材料性能控制在纳米结构和微观结构水平。DFM PU用于控制表面功能，而传统的大块PU提供独立控制的机械性能。提出的工作重点是一种新的和潜在的经济方法来引入化学功能，特别是在聚合物材料的表面。所提出的表面化学控制预计将改善制成品的附着力和耐久性，促进生物医学材料的长期功能，并产生用于在接触时破坏危险病原体的新材料。