Hierarchically Structured Films via Layer-by-Layer Assembly and Their Superhydrophilic and Antifogging Properties
Layer-by-layer (LbL) assembly is a recently developed technique for fabricating thin films. It is green (aqueous solutions based), and allows films to be assembled facilely onto surfaces of varied morphologies, such as planar, spherical, and cylindrical surfaces.In the current work, raspberry-like organic/inorganic composite spheres (RCNs) were prepared by stepwise electrostatic assembly of polyelectrolytes (Poly(diallyldimethylammonium chloride(PDDA)and sodium poly(4-styrenesulfo-nate (PSS)) and silica nanoparticles onto monodisperse silica or polystyrene nanospheres. When the RCNs were deposited on substrates that had been primed with (PDDA/PSS)10/PDDA mutilayers, films of hierarchically structured roughness were obtained. After calcination, different nanostructured films were prepared. As for silica/polyelectrolytes/silica composite spheres,the film morphology did not change after calcination.In the case of polystyrene/polyeleetrolytes/silica composite spheres, however, polystyrene spheres were removed after calcination, leading to hierarchically structured porous films of silica hollow spheres.
Junhui He Xiangmei Liu
Functional Nanomaterials Laboratory,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences (CAS),Zhongguancun Beiyitiao 2,Haidianqu,Beijing 100190,China
国际会议
5th International Symposium on High-Tech Polymer Materials(HTPM-V)(第五届国际高技术高分子材料学术会议)
北京
英文
133
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）