Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Republic of Korea.
Nanoscale Res Lett. 2012 Aug 8;7(1):440. doi: 10.1186/1556-276X-7-440.
We successfully synthesized two different structures, silica nanospheres and porous polymer membranes, via nanophase separation, based on a sol-gel process. Silica sol, which was in situ polymerized from tetraorthosilicate, was used as a precursor. Subsequently, it was mixed with a polymer that was used as a matrix component. It was observed that nanophase separation occurred after the mixing of polymer with silica sol and subsequent evaporation of solvents, resulting in organizing various structures, from random network silica structures to silica spheres. In particular, silica nanospheres were produced by manipulating the mixing ratio of polymer to silica sol. The size of silica beads was gradually changed from micro- to nanoscale, depending on the polymer content. At the same time, porous polymer membranes were generated by removing the silica component with hydrofluoric acid. Furthermore, porous carbon membranes were produced using carbon source polymer through the carbonization process.
我们成功地通过纳米相分离，基于溶胶-凝胶过程，合成了两种不同的结构，即二氧化硅纳米球和多孔聚合物膜。硅溶胶是由正硅酸乙酯原位聚合而成的，用作前体。随后，将其与用作基质成分的聚合物混合。观察到聚合物与硅溶胶混合并随后蒸发溶剂后发生纳米相分离，从而形成了各种结构，从随机网络二氧化硅结构到二氧化硅球。特别是，通过控制聚合物与硅溶胶的混合比，可以制备出二氧化硅纳米球。二氧化硅珠的大小逐渐从微米级变为纳米级，取决于聚合物的含量。同时，通过用氢氟酸去除二氧化硅成分，可以生成多孔聚合物膜。此外，通过碳化过程使用碳源聚合物，可以制备多孔碳膜。
