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.

非技术性总结：该RUI（本科院校研究）CAS（可持续发展的关键方面）合作计划的总体目标是通过用离子基团官能化纤维素来创建和评估新的导电材料。纤维素是一种廉价的可持续原料，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，纤维素在开发用于能源储存和二氧化碳捕获等应用的先进材料方面一直未得到充分利用，这两种材料在当今世界都非常重要。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储存和运输方面的知识。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）的主要本科生团队合作完成，不仅希望为参与的学生提供丰富和有益的教育经验，而且希望继续两组之间的可持续合作。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另一所大学度过一个夏天的机会，学习聚合物合成，形态学和材料表征，从而提高他们的科学教育的广度。由于MSU位于肯塔基州农村，RUC位于新泽西城市，这些学生也将体验截然不同的社会学环境，进一步提高他们对合作科学研究的赞赏。学生参与者将获得一个有益的，前沿的研究经验，这将为他们准备干相关的专业，职业和/或预科学校。技术概要：该提议的中心假设是，通过用离子液体（IL）或聚（离子液体）（PIL）基团官能化纤维素，将开发出一类新的导电材料，并且可以通过仔细选择IL/PIL结构来操纵它们的最终使用性质（机械、导电、形态）。虽然纤维素本身的链段动力学相对较慢，导致高刚度和差的导电性，但由于形态的变化，用IL或PIL基团官能化将导致增强的柔性和离子导电性。PI提出了三个目标作为本提案的一部分：（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）在CO2捕获/吸收中选择材料的评价。离子电导率，主链间距，多糖结晶度，离子聚集，和微相分离将使用一系列技术，包括电化学阻抗谱，X射线散射，化学作图，电子显微镜，和量热实验进行评估。密歇根州立大学将作为该提案的牵头机构，并将监督所有综合推进以及财务/技术报告的全面管理。RUC将负责材料的表征（导电性，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MSU整合，因为有希望的领导人已经开发出来。将在这两个机构进行二氧化碳分离/捕获测量，并在时间允许的情况下在第三年完成。如上所述，相当数量的本科STEM学生将获得该奖项的支持，获得包括单体/聚合物合成和表征（FTIR，TGA，DSC，X射线散射，DRS，SEM等）的技能。在拟议的IRUE计划的学生将获得一个独特的社会学视角，以及他们的科学技能的扩大。综合方法，材料分析和应用程序经过精心挑选，以便为学生参与者提供有益的研究经验，同时产生高质量的数据，这些数据将在国内和国际公认的同行评审期刊上传播，并在专业会议上提出。PI坚信，他们的研究结果将极大地提升可持续导电材料领域，并对能源运输/储存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，并被认为是值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估的支持。

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