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LEAPS-MPS: Photodynamic Hybrid Polymer Network Sponges and their Structure-Property Relationships

LEAPS-MPS：光动力杂化聚合物网络海绵及其结构-性能关系

基本信息

批准号：
2137672
负责人：
Joseph Furgal
金额：
$ 24.71万
依托单位：
Bowling Green State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-09-01 至 2025-08-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2137672&HistoricalAwards=false
关键词：
LEAPS MPS Photodynamic Hybrid Polymer

项目摘要

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2).NON-TECHNICAL SUMMARY:The goal of this research is to develop a fundamental understanding of a series of selective, light activated smart material sponges useful for environmental remediation of omnipresent toxic pollutants such as perfluoroalkyl (PFAS) “forever chemicals.” This project will also meld together a diverse team of researchers to carry out this work and to influence, train, and mentor a broad representation of middle, high school and undergraduate students to recruit and train them for future success in the U.S. science workforce.Specifically the PI's group will synthesize silicon-based light-responsive sponges that can capture specific substances and undergo unique reversible shrinking phenomena to then expel them on demand with certain light wavelengths and energies. This light-driven process is quite complex in solid materials such as silicon networks and this research will aid in gaining an understanding of how these responsive sponges behave when having different building blocks that either change shape or break apart using light. The investigation will also determine how the structures of the material influence their behavior and ability to selectively soak up and release explicit substances on demand. Lastly, their abilities and efficiencies in remediation of PFAS type compounds, which are difficult to selectively isolate from water sources, will be detailed. Racially and ethnically diverse high school and undergraduate students will have the opportunity to contribute to the development of this project and gain laboratory training with scientists at BGSU to aid in the diversification of the student body toward science-based careers. A series of workshops focused on smart light responsive materials, environmental remediation and health priorities as well as the opportunity to spend time shadowing student scientists in the laboratory will be conducted in local areas with high concentrations of under-represented minorities (Warren, MI / Toledo, OH). These opportunities will assist in both attracting and retaining an expansive array of scientists. TECHNICAL SUMMARY:The PI and his group will develop reusable and robust high porosity "smart" sponges that can experience large volume changes after light irradiation to ultimately be used for environmental remediation of persistent pollutants (e.g. PFAS). Gels and solids of Q-silsesquioxane networks will be cross-linked with designed photoswitchable and dynamic groups that feature allyl or vinyl functionalization. Structure-property relationships of these novel photoresponsive materials will be determined to improve photoresponsive behaviors, determine what makes a high-performance material and its substance uptake/release ability (i.e. petrochemicals). Silsesquioxanes’ use as dynamic materials remains less explored than traditional polymers due to the intricacies of functionalization and silsesquioxanes’ inherent rigidity, despite the prevalence of silicone materials in a variety of household and industrial products. These materials offer advantages over typical photodynamic sponges (i.e. hydrogels, organogels), by overcoming synthetic, structural, and actuation limitations. These include increased environmental stabilities and better mechanical properties due to siloxane cores, excellent control of tunability to work with many target substances, and facile structural assembly. This research will also expand the exploration of improved methods for the capture of cancer-causing persistent “forever chemicals” such as perfluoroalkyl substances (PFAS) for the improvement of human and environmental health. For educational initiatives, university students will participate in scientific endeavors with regional companies to build career development relationships and experience real-world scientific challenges as part of public impact outreach. Mentorship will be given to a diverse set of middle and high school students as they participate in polymer workshops and laboratory research experiences to provide insight on the importance of science and how the proposed research may impact society on an individual and broader scale. These initiatives aim to increase youth involvement in the STEM fields by hands-on interactions, connections, and working with a diverse group of scientists from various backgrounds..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.

该奖项全部或部分由《2021年美国救援计划法案》（公法117-2）资助。非技术总结：本研究的目的是对一系列选择性的、光激活的智能材料海绵有一个基本的了解，这些海绵可用于环境修复无所不在的有毒污染物，如全氟烷基（PFAS）“永远的化学品”。该项目还将融合一个多样化的研究团队来开展这项工作，并影响、培训和指导广泛代表的初中、高中和本科生，以招募和培训他们，为未来在美国科学队伍中取得成功做好准备。具体来说，PI的团队将合成硅基光响应海绵，这种海绵可以捕获特定物质，并经历独特的可逆收缩现象，然后根据需要用特定的波长和能量将它们排出。这种光驱动过程在诸如硅网络之类的固体材料中是相当复杂的，这项研究将有助于了解当不同的构建块在光的作用下改变形状或破裂时，这些反应性海绵的行为。调查还将确定材料的结构如何影响它们的行为和选择性吸收和释放特定物质的能力。最后，将详细介绍它们在修复难以从水源中选择性分离的PFAS型化合物方面的能力和效率。种族和民族多样化的高中生和本科生将有机会为这个项目的发展做出贡献，并与BGSU的科学家一起获得实验室培训，以帮助学生群体向以科学为基础的职业发展。将在少数族裔高度集中的当地地区（密歇根州沃伦/俄亥俄州托莱多）举办一系列讲习班，重点关注智能光响应材料、环境修复和健康优先事项，并有机会花时间在实验室跟踪学生科学家。这些机会将有助于吸引和留住大批科学家。技术概述：PI和他的团队将开发可重复使用的、坚固的高孔隙度“智能”海绵，这种海绵在光照后可以经历大的体积变化，最终用于持久性污染物（如PFAS）的环境修复。q -硅氧烷网络的凝胶和固体将与设计的具有烯丙基或乙烯基功能化特征的光开关和动态基团交联。这些新型光响应材料的结构-性能关系将被确定，以改善光响应行为，确定是什么使高性能材料及其物质吸收/释放能力（如石油化工）。尽管有机硅材料在各种家用和工业产品中普遍存在，但由于功能化的复杂性和硅氧烷固有的刚性，硅氧烷作为动态材料的使用仍然比传统聚合物较少探索。这些材料通过克服合成、结构和驱动限制，比典型的光动力海绵（即水凝胶、有机凝胶）具有优势。其中包括由于硅氧烷核心而增加的环境稳定性和更好的机械性能，对许多目标物质的可调性的出色控制，以及易于组装的结构。这项研究还将扩大探索捕获致癌的持久性“永久化学品”（如全氟烷基物质）的改进方法，以改善人类和环境健康。在教育方面，大学生将与地区公司一起参与科学活动，建立职业发展关系，并体验现实世界的科学挑战，作为公共影响拓展的一部分。指导将给予各种各样的初高中学生，因为他们参加了聚合物研讨会和实验室研究经验，以提供对科学重要性的见解，以及拟议的研究如何在个人和更广泛的范围内影响社会。这些计划旨在通过与来自不同背景的不同科学家群体的实际互动、联系和合作，增加青少年对STEM领域的参与。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。