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.

改善疲劳寿命的自修复聚合物这个合作的目标项目寻求通过添加自修复功能来提高热固性聚合物的疲劳寿命。热固性聚合物被广泛应用于从复合结构到粘接接头再到微电子封装的各种应用。因为这些聚合物的应变到失效的概率很低，所以它们非常容易受到破裂形式的破坏。疲劳加载尤其成问题，会导致结构内部深处产生小裂纹，在那里很难检测到，而且几乎不可能修复。这些裂纹往往会导致材料的灾难性失效。自我修复功能是通过在聚合物基质中加入微胶囊治愈剂和催化化学触发器来实现的。将进行基础研究，以解决与疲劳损伤自我修复相关的关键问题。自动修复脆性聚合物中的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，并代表着开发寿命大大延长的材料系统的第一步。这一GOALI项目将使探索微电子应用这一新技术的合作努力成为可能。结果将导致基本的科学基础，新的设计和生产实践的基础上，改善疲劳性能。拟议的工作将对两名研究生和一名本科生研究助理进行教育和培训。此外，这个项目中的几个概念将被纳入一个新的高年级本科生/一年级研究生水平课程，名为自主材料系统。