title: Preparation and Surface Property of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomer/Talc Composite-Encapsulated Organic Compounds: Application for the Separation of Oil and Water.
abstract: Fluoroalkyl end-capped vinyltrimethoxysilane oligomer [R(F)-(CH2-CHSi(OMe)3)n-R(F); n = 2, 3; R(F) = CF(CF3)OC3F7 (R(F)-VM oligomer)] can undergo the sol-gel reaction in the presence of talc particles under alkaline conditions at room temperature to provide the corresponding fluorinated oligomeric silica/talc nanocomposites (RF-VM-SiO2/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)-COOH) are effectively encapsulated into the R(F)-VM-SiO2/Talc composite cores to afford the corresponding fluorinated nanocomposites-encapsulated these guest molecules. The R(F)-VM-SiO2/Talc composites encapsulated low molecular weight aromatic compounds such as HMB and BPA can exhibit a superoleophilic-superhydrophobic characteristic on the surfaces; however, the R(F)-VM-SiO2/Talc composite-encapsulated THSP and R(F)-COOH exhibit a superoleophobic-superhydrophilic characteristic on the modified surfaces. In these nanocomposites, the R(F)-VM-SiO2/Talc/THSP composites are applicable to the surface modification of polyester fabric, and the modified polyester fabric possessing a superoleophobic-superhydrophilic characteristic on the surface can be used for the membrane for oil (dodecane)/water separation. In addition, the R(F)-VM-SiO2/Talc composites-encapsulated 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.
authors.affiliation: †Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan.
authors.forename: Yuri
authors.initials: Y
authors.lastname: Oikawa
authors.affiliation: †Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan.
authors.forename: Tomoya
authors.initials: T
authors.lastname: Saito
authors.affiliation: ‡Research and Development Division, , Nippon Chemical Industrial Co., Ltd., Koto-ku, Tokyo 136-8515, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yamada
authors.affiliation: ‡Research and Development Division, , Nippon Chemical Industrial Co., Ltd., Koto-ku, Tokyo 136-8515, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Sugiya
authors.affiliation: †Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Sawada
keywords: cross-linked polystyrene particle; fluorinated oligomer; separation of oil/water; silica; superamphiphobic characteristic; superhydrophilic−superoleophobic characteristic; superhydrophobic−superoleophilic characteristic; talc composite