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.

非技术总结项目旨在开发下一波可持续聚合物，将可持续性与物质耐用性和实用性合并。一个核心目的是克服聚合物科学中当前的二分法，其中可回收和可重新处理的材料通常缺乏稳定性，而更健壮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，该项目旨在开发可提供长期可用性和先天可靠性的聚合物，同时保持其强大的性质和对解决方案和高温的抵抗力。该研究将探讨一个未充分利用的化学部分的关键分子参数，该化学部分将控制聚合物生命周期（从合成到降解）与性能相比的加工性。该项目的成功将导致材料需要较少替换，从而减少浪费并促进可持续性。该项目的关键组成部分涉及针对各个级别的本地学生的教育和外展活动，以及在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。技术总结研究集中于四个特定的目标，这些特定目标集体寻求扩大共价适应能力材料的能力（CANS）。 AIM 1使用吊坠方酯作为一种新型的动态交换机制，以改善无催化剂交换化学材料的多样性。 AIM 2将探讨垂直组千分准对超分子聚合物网络的影响，旨在了解方形如何对网络属性和响应行为有何贡献。 AIM 3中的工作将结合方酰胺和vinyllogous的尿电烷交换，以生成既动态共价又超分子的材料，旨在说明可以通过直接方法附加的增强性能。 AIM 4试图通过阶梯增长的多浓度开发一种新的动态交换方法，旨在为罐子引入独特的交换化学。研究员工一组旨在阐明基本结构 - 特性关系的分子操作。该方法的模块化为理解链结构，拓扑和功能在联想交联聚合物的动态行为中的作用提供了一个可行的平台。这项研究的科学广泛影响通过设计具有更长寿命和可回收性的聚合物来促进可持续性。这项工作将动态网络的好处扩展到了新的交换机制，为可持续材料提供了另一种途径。教育目标包括该项目是下一代科学家的培训理由。学生将获得各种合成和材料表征方法的专业知识，并对聚合物科学的当代和基础方面有平衡的理解。一项多管齐下的外展计划旨在促进兴奋和扩大参与科学的参与。该计划包括研究经验，专注于代表性不足的少数民族。通过将科学研究与教育和外展活动相结合，该项目旨在为聚合物科学领域做出重大贡献，同时还满足了更广泛的社会需求。该奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的影响审查标准通过评估来获得的支持。