Room Temperature Nano-Structure Synthesis in Aerosols

气溶胶中的室温纳米结构合成

• 批准号: 0070214
• 负责人: Gregory Beaucage
• 金额: $ 24万
• 依托单位: University of Cincinnati Main Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0070214&HistoricalAwards=false
• 关键词: Room; Temperature; Nano; Structure; Synthesis

AbstractThe proposed goal is to produce nanostructured aerosols by room temperature synthesis. Unlike the aerosol flame synthesis procedure, it should produce non-oxidized powders with reasonably large specific surface areas. Such a technique was demonstrated earlier by the PI in the formation of nanostructured titania and silica from mixed vapor streams devoid of the traditional solvents. This "aero-sol-gel" reactor can produce continuously meso- and microporous metal oxides, with tunable specific surface areas ranging from 100 to 700 m2/g , for a very limited invested cost. Parallel organic processes are also considered, with a view to produce nanostructured hybrids of organic and metal oxides. Rapid removal of volatile byproducts is expected to accelerate the chemical process and prevent the collapse of the nanopowders pores. A number of applications could replace existing technologies, with better qualities and at lower cost. Two target applications are proposed: one is the organic elastomer reinforcement with "tuned" nanostructured silica; the other one is the creation of ultra-violet absorbing nanostructured titania for such chemicals as polymers or paint. The precision in the design and manufacture of such aggregates is essential to their effectiveness; this part of the proposed research will be accomplished in coordination with several important high technology industries.

摘要所提出的目标是通过室温合成生产纳米结构气溶胶。与气溶胶火焰合成过程不同，它应该产生具有相当大的比表面积的非氧化粉末。 PI 早些时候在从不含传统溶剂的混合蒸气流中形成纳米结构的二氧化钛和二氧化硅中证明了这种技术。这种“气溶胶-凝胶”反应器可以连续生产介孔和微孔金属氧化物，其可调比表面积范围为100至700平方米/克，投资成本非常有限。还考虑了并行有机过程，以生产有机和金属氧化物的纳米结构杂化物。快速去除挥发性副产物有望加速化学过程并防止纳米粉末孔隙塌陷。许多应用程序可以取代现有技术，并以更好的质量和更低的成本。提出了两个目标应用：一是“调整”纳米结构二氧化硅的有机弹性体增强材料；另一种是为聚合物或油漆等化学品制造吸收紫外线的纳米结构二氧化钛。此类骨料的设计和制造精度对其有效性至关重要；这部分拟议研究将与几个重要的高科技行业协调完成。