Circularizing Squarate-Based Materials: Novel Dynamic Networks

圆形方形材料：新型动态网络

• 批准号: 2404144
• 负责人: Brent Sumerlin
• 金额: $ 66.46万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-06-01 至 2028-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2404144&HistoricalAwards=false
• 关键词: Circularizing; Squarate; Based; Materials; Novel

NON-TECHNICAL SUMMARYThis project seeks to develop the next wave of sustainable polymers, merging sustainability with material durability and practicality. A central objective is to overcome the current dichotomy within polymer science wherein recyclable and reprocessable materials often lack stability, while more robust ones lead to negative consequences because of their long-term environmental persistence. Through innovative design and precise molecular manipulation, this project aims to develop polymers that offer both long-term usability and innate reparability while maintaining their robust nature and resistance to solvents and high temperatures. The research will explore the critical molecular parameters of an underutilized chemical moiety that will govern polymer lifecycle—from synthesis to degradation—balancing processability with performance. The success of this project will lead to materials that require less frequent replacement, thereby reducing waste and promoting sustainability. Critical components of this project involve educational and outreach activities directed toward local students of all levels, as well as training and professional development of graduate and undergraduate students in emerging areas of chemistry and polymer science.TECHNICAL SUMMARYThe research focuses on four specific aims that collectively seek to expand the capabilities of covalent adaptable materials (CANs). Aim 1 investigates using pendent squarate esters as a novel dynamic exchange mechanism for CANs to improve the diversity of catalyst-free exchange chemistries for vitrimer materials. Aim 2 will explore the influence of pendent group squaramides on supramolecular polymer networks, aiming to understand how squaramides contribute to network properties and responsive behavior. The work in Aim 3 will combine squaramide and vinylogous urethane exchange to generate materials that are both dynamic-covalent and supramolecular, aiming to illustrate the enhanced properties that can be attained through straightforward methods. Aim 4 seeks to develop a new dynamic exchange approach through step-growth polycondensation, aiming to introduce unique exchange chemistry for CANs. The research employs a comprehensive set of molecular manipulations designed to elucidate fundamental structure-property relationships. The modularity of the approach provides a viable platform for understanding the roles of chain structure, topology, and functionality in the dynamic behavior of associatively crosslinked polymers. The scientific broader impacts of this research contribute to sustainability by designing polymers with longer life spans and recyclability. The work extends the benefits of dynamic networks to new exchange mechanisms, offering an alternative route to sustainable materials. The educational goals include this project serving as a training ground for the next generation of scientists. Students will acquire expertise in various synthetic and materials characterization methods, gaining a balanced understanding of both contemporary and foundational aspects of polymer science. A multi-pronged outreach program aims to foster excitement and broaden participation in science. The program includes research experiences with a focus on underrepresented minorities. By integrating scientific research with educational and outreach activities, the project aims to make a significant contribution to the field of polymer science while also addressing broader societal needs..This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目旨在开发下一波可持续聚合物，将可持续性与材料耐久性和实用性相结合。一个中心目标是克服聚合物科学中目前的二分法，即可回收和可再加工材料往往缺乏稳定性，而更坚固的材料由于其长期的环境持久性而导致负面后果。通过创新的设计和精确的分子操作，该项目旨在开发既具有长期可用性又具有先天可修复性的聚合物，同时保持其坚固性和耐溶剂性和高温性。该研究将探索未充分利用的化学片段的关键分子参数，这些参数将控制聚合物的生命周期——从合成到降解——平衡可加工性和性能。该项目的成功将导致材料不需要频繁更换，从而减少浪费和促进可持续性。该项目的关键组成部分包括针对各级当地学生的教育和推广活动，以及对化学和聚合物科学新兴领域的研究生和本科生的培训和专业发展。技术概述本研究集中于四个具体目标，共同寻求扩大共价适应性材料（can）的能力。目的1研究了利用悬垂的方酯作为一种新型的can动态交换机制，以提高聚合物材料无催化剂交换化学的多样性。目的2将探讨悬垂基团角鲨酰胺对超分子聚合物网络的影响，旨在了解角鲨酰胺如何促进网络性质和响应行为。Aim 3的工作将结合方酰胺和乙烯基聚氨酯交换来生成既具有动态共价又具有超分子的材料，旨在说明通过直接方法可以获得的增强性能。目标4旨在通过步长缩聚开发一种新的动态交换方法，旨在为can引入独特的交换化学。该研究采用了一套全面的分子操作，旨在阐明基本的结构-性质关系。该方法的模块化为理解链结构、拓扑结构和功能在结合交联聚合物动态行为中的作用提供了一个可行的平台。这项研究的科学影响更广泛，通过设计具有更长的寿命和可回收性的聚合物，有助于可持续发展。这项工作将动态网络的好处扩展到新的交换机制，为可持续材料提供了另一种途径。教育目标包括这个项目作为下一代科学家的训练基地。学生将获得各种合成和材料表征方法的专业知识，对聚合物科学的当代和基础方面有一个平衡的理解。一个多管齐下的推广项目旨在激发人们对科学的兴趣，扩大人们对科学的参与。该项目包括研究经验，重点关注未被充分代表的少数民族。通过将科学研究与教育和推广活动相结合，该项目旨在为聚合物科学领域做出重大贡献，同时满足更广泛的社会需求。该奖项反映了美国国家科学基金会的法定使命，并通过基金会的智力价值和更广泛的影响审查标准进行了评估，认为值得支持。