Room Temperature Nano-Structure Synthesis in Aerosols

目标是通过室温合成制备纳米结构气溶胶。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。这种技术在PI早期从没有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得到了证明。这种“气溶胶-凝胶”反应器可以以非常有限的投资成本连续生产介孔和微孔金属氧化物，其比表面积范围为100至700 m2/g。平行的有机工艺也被考虑，以期产生有机和金属氧化物的纳米结构的混合物。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的塌陷。一些应用程序可以取代现有的技术，质量更好，成本更低。提出了两个目标应用：一个是有机弹性体增强与“调谐”纳米结构的二氧化硅;另一个是紫外线吸收纳米结构的二氧化钛，如聚合物或油漆等化学品的创建。这种骨料的设计和制造精度对其有效性至关重要;拟议研究的这一部分将与几个重要的高科技行业协调完成。

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.