Preparation and Surface Property of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomer/Talc Composite-Encapsulated Organic Compounds: Application for the Separation of Oil and Water

详细信息    查看全文

• 作者：Yuri Oikawa ; Tomoya Saito ; Satoshi Yamada ; Masashi Sugiya ; Hideo Sawada
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 1, 2015
• 年：2015
• 卷：7
• 期：25
• 页码：13782-13793
• 全文大小：538K
• ISSN：1944-8252

文摘

Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [R_F鈥?CH₂鈥揅HSi(OMe)₃)_n鈥揜_F; n = 2, 3; R_F = CF(CF₃)OC₃F₇ (R_F鈥揤M oligomer)] can undergo the sol鈥揼el reaction in the presence of talc particles under alkaline conditions at room temperature to provide the corresponding fluorinated oligomeric silica/talc nanocomposites (R_F鈥揤M鈥揝iO₂/Talc). A variety of guest molecules such as 2-hydroxy-4-methoxybenzophenone (HMB), bisphenol A (BPA), bisphenol AF, 3-(hydroxysilyl)-1-propanesulfonic acid (THSP), and perfluoro-2-methyl-3-oxahexanoic acid (R_F鈥揅OOH) are effectively encapsulated into the R_F鈥揤M鈥揝iO₂/Talc composite cores to afford the corresponding fluorinated nanocomposites鈥揺ncapsulated these guest molecules. The R_F鈥揤M鈥揝iO₂/Talc composites encapsulated low molecular weight aromatic compounds such as HMB and BPA can exhibit a superoleophilic鈥搒uperhydrophobic characteristic on the surfaces; however, the R_F鈥揤M鈥揝iO₂/Talc composite-encapsulated THSP and R_F鈥揅OOH exhibit a superoleophobic鈥搒uperhydrophilic characteristic on the modified surfaces. In these nanocomposites, the R_F鈥揤M鈥揝iO₂/Talc/THSP composites are applicable to the surface modification of polyester fabric, and the modified polyester fabric possessing a superoleophobic鈥搒uperhydrophilic characteristic on the surface can be used for the membrane for oil (dodecane)/water separation. In addition, the R_F鈥揤M鈥揝iO₂/Talc composites鈥揺ncapsulated micrometer-size controlled cross-linked polystyrene particles can be also prepared under similar conditions, and the obtained composite white-colored particle powders are applied to the packing material for the column chromatography to separate water-in-oil (W/O) emulsion.