RUI: CAS: Collaborative Research: Synthesis, Conductivity and Morphology of Cellulose-Based Ionic Materials

RUI：CAS：合作研究：纤维素基离子材料的合成、电导率和形貌

• 批准号: 2104375
• 负责人: Kevin Miller
• 金额: $ 19.02万
• 依托单位: Murray State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-07-01 至 2025-06-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2104375&HistoricalAwards=false
• 关键词: RUI; CAS; Collaborative; Research; Synthesis

NON-TECHNICAL SUMMARY: The overall goal of this RUI (Research in Undergraduate Institutes) CAS (Critical Aspects of Sustainability) Collaborative program is to create and evaluate new conductive materials by functionalizing cellulose with ionic groups. Cellulose represents an inexpensive, sustainable feedstock with a number of desirable properties, including good mechanical strength and high permeability. However, cellulose has been underutilized in the development of advanced materials for applications such as energy storage and carbon dioxide capture, both of which are extremely important in today’s world. In this work, ion-containing, cellulose-based materials will be synthesized and characterized in order to understand fundamental relationships between material structure and properties. Cellulose will be used extensively as a foundational material for the formation of conductive polymers and the results will help advance knowledge in energy storage and transport. The work proposed here will be completed collaboratively by a team of primarily undergraduate students from Murray State University (MSU) and Rutgers University-Camden (RUC) in the hopes of not only providing a rich and rewarding educational experience for the students involved, but also to continue a sustainable collaboration between the two groups. Through this RUI proposal, the Integration of Rural and Urban educational Experience (IRUE) will be created, offering students from each university the opportunity to spend part of a summer at the other respective institution to learn polymer synthesis, morphology, and materials characterization, thus advancing the breadth of their scientific education. As MSU is located in rural Kentucky and RUC is located in urban New Jersey, these students will also experience vastly different sociological environments, further enhancing their appreciation for collaborative scientific research. Student participants will receive a rewarding, cutting-edge research experience that will prepare them for STEM-related majors, careers and/or pre-professional school. TECHNICAL SUMMARY: The central hypothesis of this proposal is that, through functionalization of cellulose with an ionic liquid (IL) or poly(ionic liquid) (PIL) group, a new class of conductive materials will be developed and that their end-use properties (mechanical, conductive, morphological) can be manipulated through careful choice of IL/PIL structure. Although the segmental dynamics of cellulose itself are relatively slow, leading to high stiffness and poor conductivity, functionalization with an IL or PIL group will lead to enhanced flexibility and ionic conduction due to changes in morphology. The PIs propose three objectives as part of this proposal: (1) synthesis and characterization of IL-functionalized cellulosic materials, (2) synthesis and characterization of PIL-grafted cellulosic materials, and (3) evaluation of select materials in CO2 capture/absorption. Ionic conductivity, backbone-to-backbone spacing, polysaccharide crystallinity, ion aggregation, and microphase separation will be evaluated using a combination of techniques, including electrochemical impedance spectroscopy, X-ray scattering, chemical mapping, electron microscopy, and calorimetry experiments. MSU will serve as the lead institution of the proposal and will oversee all of the synthetic thrusts as well as the overall management of financial/technical reporting. RUC will be responsible for characterization (conductivity, morphology) of the materials, including the affect of humidity on these properties, and then integrate with MSU in the synthetic efforts during years two and three as promising leads are developed. Carbon dioxide separation/capture measurements will be made at both institutions and completed as time permits in year three. As mentioned above, a significant number of undergraduate STEM students will be supported by this award, acquiring skills that encompass monomer/polymer synthesis and characterization (FTIR, TGA, DSC, X-ray scattering, DRS, SEM, etc.). Students in the proposed IRUE program will gain a unique sociological perspective as well as a broadening of their scientific skills. Synthetic approaches, materials analyses and applications were carefully selected so as to provide student participants with a rewarding research experience while generating high quality data which will be disseminated in nationally and internationally recognized, peer-reviewed journals and presented at professional meetings. The PIs firmly believe that their results will greatly enhance the area of sustainable, conductive materials with long-range implications in energy transport/storage and CO2 capture..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.

非技术摘要：该 RUI（本科院校研究）CAS（可持续发展的关键方面）合作项目的总体目标是通过用离子基团对纤维素进行功能化来创建和评估新型导电材料。纤维素是一种廉价、可持续的原料，具有许多理想的特性，包括良好的机械强度和高渗透性。然而，纤维素在能源存储和二氧化碳捕获等应用的先进材料开发中并未得到充分利用，这两者在当今世界都极其重要。在这项工作中，将合成和表征含离子的纤维素基材料，以了解材料结构和性能之间的基本关系。纤维素将被广泛用作形成导电聚合物的基础材料，其结果将有助于推进能量存储和运输方面的知识。这里提出的工作将由来自默里州立大学 (MSU) 和罗格斯大学卡姆登分校 (RUC) 的一个主要由本科生组成的团队合作完成，希望不仅为参与的学生提供丰富而有益的教育经验，而且希望继续两个团队之间的可持续合作。通过这项 RUI 提案，将创建城乡教育体验一体化 (IRUE)，为每所大学的学生提供在对方机构度过暑假的一部分时间来学习聚合物合成、形态和材料表征的机会，从而提高他们科学教育的广度。由于密歇根州立大学位于肯塔基州农村，而中国人民大学位于新泽西州城市，这些学生还将体验截然不同的社会环境，进一步增强他们对合作科学研究的欣赏。学生参与者将获得有益的、前沿的研究经验，为他们进入 STEM 相关专业、职业和/或职业预科学校做好准备。技术摘要：该提案的中心假设是，通过用离子液体 (IL) 或聚离子液体 (PIL) 基团对纤维素进行功能化，将开发出一类新型导电材料，并且可以通过仔细选择 IL/PIL 结构来控制其最终使用特性（机械、导电、形态）。尽管纤维素本身的链段动力学相对较慢，导致刚性高且导电性差，但用IL或PIL基团进行官能化将由于形态的变化而导致柔韧性和离子传导性的增强。作为该提案的一部分，PI 提出了三个目标：(1) IL 功能化纤维素材料的合成和表征，(2) PIL 接枝纤维素材料的合成和表征，以及 (3) 评估所选材料在 CO2 捕获/吸收方面的性能。将使用电化学阻抗谱、X射线散射、化学图谱、电子显微镜和量热实验等技术组合来评估离子电导率、主链间距、多糖结晶度、离子聚集和微相分离。密歇根州立大学将作为该提案的牵头机构，并将监督所有综合主旨以及财务/技术报告的整体管理。 RUC 将负责材料的表征（电导率、形态），包括湿度对这些性能的影响，然后在第二年和第三年的合成工作中与密歇根州立大学整合，开发出有前景的先导化合物。二氧化碳分离/捕获测量将在两个机构进行，并在第三年时间允许的情况下完成。如上所述，大量 STEM 本科生将获得该奖项的支持，获得涵盖单体/聚合物合成和表征（FTIR、TGA、DSC、X 射线散射、DRS、SEM 等）的技能。参加拟议的 IRUE 项目的学生将获得独特的社会学视角，并拓宽他们的科学技能。综合方法、材料分析和应用都经过精心挑选，以便为学生参与者提供有益的研究经验，同时生成高质量的数据，这些数据将在国内和国际认可的同行评审期刊上传播并在专业会议上展示。 PI 坚信，他们的成果将极大地增强可持续导电材料领域的发展，对能源运输/存储和二氧化碳捕获产生长期影响。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Dual Ionic Liquid-Functionalized Cellulosic Materials: Thermal, Conductive, and Morphological Properties

• DOI: 10.1021/acsapm.3c02815
• 发表时间: 2024-02
• 期刊: ACS Applied Polymer Materials
• 影响因子: 5
• 作者: Elizabeth A. Hays;Gabrielle Eicher;Abneris Morales;David Salas-de la Cruz;Kevin M. Miller