CAREER: Confinement and flow effects on synthesis of sol-gel materials

职业：限制和流动对溶胶-凝胶材料合成的影响

• 批准号: 0852471
• 负责人: Amy Shen
• 金额: $ 37.21万
• 依托单位: University of Washington
• 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: 2008-09-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0852471&HistoricalAwards=false
• 关键词: CAREER; Confinement; flow; effects; synthesis

National Science Foundation - Division of Chemical &Transport Systems Particulate & Multiphase Processes Program (1415)ABSTRACTIntellectual MeritThe long-term goal of this proposal is to generate fundamental understanding of geometric confinement and flow effects on the synthesis of new materials. Of major interest is the advances that will occur if micron-scale confinement and flow conditions can be harnessed as synthetic tools to make well-controlled nanoporous silica (NPS) materials. NPS materials are made by using self- assembling surfactants or copolymers as templates together with simultaneous sol-gel condensation of inorganic phase (e.g., silica) around the templates. To overcome the long turn-over times and restricted ability to precisely control the orientation of NPS that limiting traditional sol-gel processing, the PI's group recently proposed and validated a technique which exploits flow-induced transitions in surfactant solutions to generate supramolecular structures that act as directing agents for NPS synthesis. This proposal introduces a new approach designed to decouple the micelle formation process from micelle-silica assembly by using microfluidics as a means of confinement, combined with flow-induced self assembly and alignment, to offer break-throughs for the synthesis of tailored NPS materials with continuous manufacturing capacity. This research will combine systematic material synthesis, characterization, and modeling to study NPS synthesis from a mixture of silica-based and surfactant solutions using microfluidics.Broader ImpactsA comprehensive educational plan will integrate the proposed research with ongoing educational activities for both students and the general public to foster broad interest in complex fluids and nanotechnology by: (a) Creating undergraduate teaching modules and a graduate course to enhance existing courses and bridge various engineering departments in the college; (b) providing undergraduate and graduate student research opportunities, while continuing our well-established emphasis on recruiting and mentoring members of underrepresented groups; (c) building strong collaborations within academic, industrial, and public educational units. Results from this project will be directly incorporated in undergraduate and graduate courses and disseminated in Missouri Nanoalliance Communities. As part of our outreach effort, we will disseminate results via the St. Louis Science Center (SLSC) annual workshop on emerging technologies, annual workshop at WU, and Public Broadcasting System (PBS) documentary programs.

国家科学基金会 - 化学与运输系统颗粒与多相过程计划（1415）AbstractIntl​​ectual值得该提案的长期目标是对几何限制和对新材料合成的流动影响产生基本理解。主要兴趣的是，如果可以将微米尺度的限制和流动条件作为合成工具，以制造良好控制的纳米多孔二氧化硅（NPS）材料，将会发生进步。 NPS材料是通过使用自组装表面活性剂或共聚物作为模板以及在模板周围无机相（例如二氧化硅）的同时溶胶 - 凝胶凝结一起制成的。为了克服长时间的转换时间和精确控制限制传统Sol-Gel处理的NP取向的限制能力，PI的组最近提出并验证了一种技术，该技术利用了表面活性剂溶液中流动诱导的过渡，以生成超分子结构，以指导NPS合成NPS合成。该提案引入了一种新方法，旨在通过使用微流体作为限制方法将胶束形成过程从胶束 - 硅硅组装中解脱出来，并结合流动诱导的自组装和对齐方式，以提供与连续制造能力量身定制的NPS NPS材料合成的突破。这项研究将结合系统的材料合成，表征和建模，以研究基于二氧化硅和表面活性剂溶液的NPS合成。使用微流体学。BroaderImplactsa Implastsa全面的教育计划将将所提出的研究与不断的教育活动整合在一起，以促进学生和公众的持续教育活动，以促进对复杂流通型和Nanotechnology的广泛兴趣，从而创建了一定的研究。现有的课程和桥梁在学院的各个工程系； （b）提供本科和研究生的研究机会，同时继续我们良好的重视招募和指导人数不足的团体成员； （c）在学术，工业和公共教育部门内建立强大的合作。该项目的结果将直接纳入本科和研究生课程，并在密苏里州的纳米方社区中进行分发。作为我们的宣传工作的一部分，我们将通过圣路易斯科学中心（SLSC）的新兴技术，WU年度研讨会以及公共广播系统（PBS）纪录片计划进行传播结果。