GOALI: Self-healing Polymers for Improved Fatigue Performance

GOALI：自修复聚合物可提高疲劳性能

• 批准号: 0218863
• 负责人: Nancy Sottos
• 金额: $ 30.48万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0218863&HistoricalAwards=false
• 关键词: GOALI; Self; healing; Polymers; Improved

Self-Healing Polymers for Improved Fatigue Life This collaborative GOALI project seeks to improve the fatigue life of thermosetting polymers through the addition of self-healing functionality. Thermosetting polymers are used in a wide variety of applications ranging from composite structures to adhesive joints to microelectronic packaging. Because these polymers have low strain-to-failure, they are highly susceptible to damage in the form of cracking. Fatigue loading is particularly problematic, causing small cracks to initiate deep within the structure where detection is difficult and repair is virtually impossible. These cracks often lead to catastrophic failure of the material. Self-healing functionality is accomplished by incorporating a microencapsulated healing agent and a catalytic chemical trigger within a polymer matrix. Fundamental research will be undertaken to address critical issues relevant to self-healing of fatigue damage. The ability to autonomically heal fatigue cracks in brittle polymers has the potential to lead to safer, more reliable materials in microelectronics and related applications and represents the first step in developing materials systems that possess greatly extended lifetimes. This GOALI project will enable collaborative efforts to explore this new technology for microelectronic applications. Results will lead to fundamental scientific foundations on which new design and production practices are based for improved fatigue performance. The proposed work will result in the education and training for two graduate students and one undergraduate research assistant. Moreover, several concepts from this project will be incorporated into a new senior undergraduate/ first year graduate level course entitled Autonomic Materials Systems.

用于提高疲劳寿命的自修复聚合物 这个 GOALI 合作项目旨在通过添加自修复功能来提高热固性聚合物的疲劳寿命。 热固性聚合物具有广泛的应用，从复合结构到粘合接头再到微电子封装。 由于这些聚合物的失效应变较低，因此它们非常容易受到开裂形式的损坏。疲劳载荷尤其成问题，导致结构深处产生小裂纹，难以检测且几乎不可能修复。这些裂纹通常会导致材料发生灾难性故障。自修复功能是通过在聚合物基质中加入微囊修复剂和催化化学触发剂来实现的。 将进行基础研究来解决与疲劳损伤自愈相关的关键问题。 自主修复脆性聚合物疲劳裂纹的能力有可能在微电子和相关应用中产生更安全、更可靠的材料，并且代表着开发寿命大大延长的材料系统的第一步。 该 GOALI 项目将促进合作探索这项新技术的微电子应用。研究结果将为新的设计和生产实践奠定基础科学基础，以提高疲劳性能。 拟议的工作将为两名研究生和一名本科生研究助理提供教育和培训。 此外，该项目的几个概念将被纳入名为“自主材料系统”的新高年级本科生/一年级研究生课程中。