Collaborative Research: Ultra-Thin Oriented Carbon Nanotube Asymmetric Composite Membranes: Theory And Experiment.

合作研究：超薄取向碳纳米管不对称复合膜：理论与实验。

• 批准号: 0755991
• 负责人: Eva Marand
• 金额: $ 16.94万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0755991&HistoricalAwards=false
• 关键词: Collaborative; Research; Ultra; Thin; Oriented

0755991MarandThis NSF award by the Chemical and Biological Separations program supports work by Professors J. Karl Johnson and Eva Marand at University of Pittsburgh and Virginia Polytechnic Institute and State University, respectively, to study novel methods for separating gaseous mixtures with very high energy efficiency. Current methods for industrial separation of mixed gases is both energy and capital intensive. We propose research to enable the design of novel membranes that selectively transport gases, have high flux, and have low capital and energy costs. The objectives of our proposed work are: (1) construct and test ultra-thin oriented single-walled carbon nanotube (SWNT) asymmetric composite membranes and (2) develop accurate molecular-level models that can elucidate the phenomena governing transport and selectivity of mixed-feed gases in the experimentally produced membranes. These objectives will be accomplished through a unique blend of experiments and atomically detailed modeling. Extensive studies of gas separation membranes indicate that new membrane materials are needed in order to dramatically improve the effectiveness of membrane-based gas separations. Theoretical and experimental studies of carbon nanotubes have indicated that these materials may provide such a breakthrough; these materials are predicted to have both high selectivities and extraordinarily high fluxes for gas transport and represent a fundamentally new class of membrane materials with the potential to allow low-cost, high efficiency separation of gases. We plan to employ a patented method, developed by us, to fabricate defect-free carbon nanotube/polymer composite membranes for experimental transport studies. This method allows us to prepare oriented SWNTs and multi-walled carbon nanotubes on large-area porous supports.

美国国家科学基金会颁发的化学和生物分离项目奖，分别支持匹兹堡大学、弗吉尼亚理工学院和州立大学的J. Karl Johnson教授和Eva Marand教授研究高效分离气体混合物的新方法。目前的工业分离混合气体的方法是能源和资本密集型的。我们建议研究能够设计出选择性输送气体的新型膜，具有高通量，并且具有低资本和能源成本。我们提出的工作目标是：(1)构建和测试超薄定向单壁碳纳米管（SWNT）不对称复合膜；(2)建立精确的分子水平模型，以阐明混合原料气体在实验制备的膜中的传输和选择性现象。这些目标将通过实验和原子细节建模的独特混合来完成。气体分离膜的广泛研究表明，为了显著提高膜基气体分离的效率，需要新的膜材料。碳纳米管的理论和实验研究表明，这些材料可能提供这样的突破；据预测，这些材料具有高选择性和极高的气体输送通量，代表了一种全新的膜材料，具有低成本、高效气体分离的潜力。我们计划采用我们开发的专利方法来制造无缺陷的碳纳米管/聚合物复合膜，用于实验输运研究。这种方法使我们能够在大面积多孔支架上制备定向碳纳米管和多壁碳纳米管。