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Synthesis and Characterization of Novel Hydrogel Formulations for the Single Chirality Purification of Single-Walled Carbon Nanotubes

用于单壁碳纳米管单手性纯化的新型水凝胶制剂的合成和表征

基本信息

批准号：
2107748
负责人：
Kevin Tvrdy
金额：
$ 25万
依托单位：
University of Colorado at Colorado Springs
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：
2021-07-01 至 2025-06-30
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2107748&HistoricalAwards=false
关键词：
Synthesis Characterization Novel Hydrogel Formulations

项目摘要

With the support of the Macromolecular, Supramolecular, and Nanochemistry Program and the Chemical Measurement and Imaging Program in the Division of Chemistry and the Interfacial Engineering Program in the Division of Chemical, Biochemical, Engineering and Transport Systems (CBET), Kevin Tvrdy of the University of Colorado at Colorado Springs is developing novel hydrogel separation media for optimizing the separation and purification of single-walled carbon nanotubes. The project explores the rational design of both relatively expensive hydrogel formulations, based on biologically derived polysaccharides, and relatively inexpensive hydrogel formulations, based on small molecule building blocks. The metric of success of this project is the degree of purity of the single chirality SWCNs that are isolated using the proposed hydrogel formulations. The availability of pure single component carbon nanotubes of uniform properties has the potential to significantly impact a wide range of applications, in nanoelectronics, biological imaging, photovoltaics and energy harvesting and storage. Master's level and undergraduate students will be involved in conducting the proposed research. Research results will be incorporated in a nanoscience course and shared with the general public in a monthly "Science on Tap" lecture series designed to promote science literacy and appreciation of science in the Colorado Springs community.In this project, Kevin Tvrdy and his students seek to develop hydrogel media specifically tailored for the chiral separation of single-walled carbon nanotubes (SWCNTs). Top-down modification of commercially-available Sephacryl hydrogels will be pursued, as well as bottom-up synthesis. Biologically derived polysaccharides will be crosslinked using radical polymerization to form novel hydrogel formulations, and a select group of water-soluble monomers and crosslinkers will be used to form alternative low-cost formulations. The hydrogel products will be characterized with spectroscopic and microscopic techniques, and their potential for SWCNTs separations based on chirality will be quantified. The metric of success of this project is the degree of purity of the single chirality SWCNTs that are isolated using the proposed hydrogel formulations. By focusing on the rational design of novel hydrogel media, this work seeks both fundamental knowledge of the chirality dependent physiochemical driving forces at the hydrogel/nanotube interface, and application of that knowledge to realize gel formulations tailored for isolation of specific nanotube chiralities. Achievement of the central goal of this project has the potential to impact how nanotubes are integrated into both fundamental and applied research.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.

科罗拉多大学斯普林斯分校的Kevin Tvrdy在化学系的大分子、超分子和纳米化学计划以及化学测量和成像计划以及化学、生化、工程和运输系统(CBET)的界面工程计划的支持下，正在开发用于优化单壁碳纳米管的分离和纯化的新型水凝胶分离介质。该项目探索了基于生物来源的多糖的相对昂贵的水凝胶配方的合理设计，以及基于小分子构件的相对廉价的水凝胶配方的合理设计。该项目成功的衡量标准是使用建议的水凝胶配方分离的单手性SWCNs的纯度程度。性能均匀的纯单组分碳纳米管的可获得性具有显著影响在纳米电子学、生物成像、光伏以及能量收集和存储方面的广泛应用的潜力。硕士和本科生将参与这项拟议的研究。研究成果将被纳入一门纳米科学课程，并在每月一次的“Science on Tap”系列讲座中与公众分享，该系列讲座旨在促进科罗拉多州斯普林斯社区的科学素养和科学欣赏。在这个项目中，Kevin Tvrdy和他的学生试图开发专门为单壁碳纳米管(SWCNTs)的手性分离量身定做的水凝胶介质。将对商用Sephacryl水凝胶进行自上而下的改性，以及自下而上的合成。生物衍生的多糖将通过自由基聚合进行交联，形成新的水凝胶配方，并将使用一组精选的水溶性单体和交联剂来形成替代的低成本配方。水凝胶产品将通过光谱和显微技术进行表征，并将量化其在基于手性的单壁碳纳米管分离中的潜力。该项目成功的衡量标准是使用建议的水凝胶配方分离的单手性SWCNT的纯度程度。通过对新型水凝胶介质的合理设计，这项工作寻求水凝胶/纳米管界面手性相关物理化学驱动力的基础知识，并应用这些知识实现为分离特定纳米管手性而量身定做的凝胶配方。该项目中心目标的实现有可能影响如何将纳米管整合到基础和应用研究中。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。