STTR Phase I: Polymer Surface Engineering for Improved Adhesion and Durability of Biocompatible Hard Coatings

STTR 第一阶段：聚合物表面工程，提高生物相容性硬质涂层的附着力和耐久性

• 批准号: 9960452
• 负责人: Guy Davis
• 金额: $ 10万
• 依托单位: DACCO SCI, INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-01-01 至 2000-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9960452&HistoricalAwards=false
• 关键词: STTR; Phase; Polymer; Surface; Engineering

This Small Business Technology Transfer Phase I project will investigate the use of polymer surface engineering to enhance the adhesion and durability of hard coatings, such as TiN. Hard coatings have the potential to improve a bulk polymer's biocompatibility as well as its wear and durability characteristics. However, the severe requirements of the interface between the hard coating and the polymer caused by the dissimilar nature of the coating and the substrate promote coating delamination and flaking, especially whencoupled with exposure to aggressive external conditions. The generally poor adhesion at the polymer/hard coating interface limits the long-term use of such structures and components in a number of applications, including biomedical implants. Accordingly, DACCO SCI, INC., and The Johns Hopkins University propose to engineer the surface of the polymer and the deposited coating using several proce-dures (Ar+ plasma / sputter deposition, NH3+/N2+ plasma/sputter deposition, and Ti evaporation / N2+ ion beam assisted deposition (IBAD)). By characterizing the surface/interface and measuring adhesion before and after accelerated durability tests, the mechanisms of adhesion can be established and the process improved to enhance adhesion and durability, tailored for specific applications.

该小型企业技术转让第一阶段项目将研究使用聚合物表面工程来增强 TiN 等硬质涂层的附着力和耐用性。 硬质涂层有可能改善本体聚合物的生物相容性及其磨损和耐用特性。 然而，由于涂层和基材的性质不同，对硬涂层和聚合物之间的界面提出了严格的要求，这会促进涂层分层和剥落，特别是当暴露于侵蚀性外部条件时。 聚合物/硬涂层界面处的粘附力通常较差，限制了此类结构和组件在包括生物医学植入物在内的许多应用中的长期使用。 因此，DACCO SCI, INC. 和约翰霍普金斯大学建议使用多种程序（Ar+ 等离子体/溅射沉积、NH3+/N2+ 等离子体/溅射沉积和 Ti 蒸发/N2+）来设计聚合物表面和沉积涂层。离子束辅助沉积（IBAD））。 通过表征表面/界面并测量加速耐久性测试前后的附着力，可以建立附着力机制并改进工艺，以增强附着力和耐久性，并针对特定应用进行定制。