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Thermal Field-Flow Fractionation of Nanoscale Materials

纳米材料的热场流分级

基本信息

批准号：
1508827
负责人：
Kim Williams
金额：
$ 45万
依托单位：
Colorado School of Mines
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2015
资助国家：
美国
起止时间：
2015-09-01 至 2019-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1508827&HistoricalAwards=false
关键词：
Thermal Field Flow Fractionation Nanoscale

项目摘要

With this award, the Chemical Measurement and Imaging Program of the Division of Chemistry is funding Professor Kim Williams of the Colorado School of Mines to develop thermal field-flow fractionation (ThFFF) as a versatile platform for separating and characterizing complex nanoscale materials. Thermal diffusion in liquids is a transport phenomenon that presents fertile ground for developing new measurement capabilities because it is founded on different principles than existing methods. The planned close collaboration with synthesis and engineering groups is ideal for maximizing research impact across different fields. Given the significant rise in the synthesis and application of polymers and organic/inorganic/metallic nanoparticle hybrids in fields such as energy, biomedicine, and coatings, the platform being targeted has significant potential for broad scientific, educational and environmental impact. In addition, an outreach program developed by Professor Williams introduces activities related to nanoscale materials to K-12 teachers of disadvantaged Denver school districts and the Rocky Mountain Camp for Dyslexic children.This project focuses on understanding of the relationship between thermal diffusion and polymer-solvent or nanoparticle-solvent parameters for the purpose of developing thermal field-flow fractionation (ThFFF) as a central tool for the analysis and study of currently intractable systems. Thermal diffusion in liquids continues to represent a fertile ground for developing separations and analyses that are founded on a different basis than existing methods. The proposed work is aimed at enhancing understanding of thermal diffusion and polymer-solvent or nanoparticle-solvent parameters that drive this transport process. Strategic libraries of materials with specifically chosen levels of complexities have been chosen, e.g., polymers with a varying set of controlled backbone lengths, side chain lengths, and grafting densities have been selected in order to enable the Williams research team to identify the main analyte properties that contribute to thermal diffusion in different solvents and to assess existing thermal diffusion theories. The overarching objectives include identifying specific co-polymer architectures and their distributions, assessing thermal diffusion trends of organic and metal hybrid nanoparticles, and demonstrating surface composition-based separations and analyses. The proposed studies are also expected to shed light on which of the prevailing models best describes polymer dynamics and dynamics of polymer systems that are confined.

有了这个奖项，化学系的化学测量和成像计划资助科罗拉多矿业学院的金威廉姆斯教授开发热场流分馏（ThFFF）作为分离和表征复杂纳米材料的通用平台。液体中的热扩散是一种传输现象，为开发新的测量能力提供了肥沃的土壤，因为它是基于与现有方法不同的原理。计划与合成和工程小组的密切合作是最大限度地提高不同领域研究影响的理想选择。鉴于聚合物和有机/无机/金属纳米粒子混合物在能源，生物医学和涂料等领域的合成和应用显着增加，目标平台具有广泛的科学，教育和环境影响的巨大潜力。此外，本发明还提供了一种方法，由威廉姆斯教授开发的一个推广项目向丹佛贫困学区的K-12教师和落基山诵读困难儿童营地介绍了与纳米材料相关的活动。该项目侧重于了解热扩散与聚合物-溶剂或纳米颗粒-溶剂参数之间的关系，以开发热场流分馏（ThFFF）作为分析和研究当前棘手系统的核心工具。液体中的热扩散仍然是开发基于与现有方法不同的基础的分离和分析的沃土。拟议的工作是为了提高理解的热扩散和聚合物溶剂或纳米颗粒溶剂参数，驱动这个运输过程。选择了具有特定复杂程度的战略材料库，例如，为了使威廉姆斯研究小组能够确定在不同溶剂中有助于热扩散的主要分析物性质，并评估现有的热扩散理论，已经选择了具有一组可变的受控主链长度、侧链长度和接枝密度的聚合物。总体目标包括确定特定的共聚物结构及其分布，评估有机和金属混合纳米粒子的热扩散趋势，并展示基于表面组成的分离和分析。拟议的研究也有望阐明哪些流行的模型最好地描述了聚合物动力学和动力学的聚合物系统的限制。