Preparation and Surface Property of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomer/Talc Composite-Encapsulated Organic Compounds: Application for the Separation of Oil and Water.
Preparation and Surface Property of Fluoroalkyl End-Capped Vinyltrimethoxysilane Oligomer/Talc Composite-Encapsulated Organic Compounds: Application for the Separation of Oil and Water.
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DOI：
10.1021/acsami.5b01588
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发表时间：
2015-06
影响因子：
9.5
通讯作者：
Yuri Oikawa;Tomoya Saito;Satoshi Yamada;Masashi Sugiya;H. Sawada
中科院分区：
文献类型：
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作者：
Yuri Oikawa;Tomoya Saito;Satoshi Yamada;Masashi Sugiya;H. Sawada
氟烷基端端乙烯基三甲氧基硅烷低聚物[R(F)-(CH2-CHSi(OMe)3)n-R(F)]；N = 2,3；R(F) = CF(CF3)OC3F7 （R(F)-VM寡聚物）]可以在室温碱性条件下在滑石颗粒存在下进行溶胶-凝胶反应，得到相应的氟化低聚二氧化硅/滑石纳米复合材料（RF-VM-SiO2/滑石）。将2-羟基-4-甲氧基二苯甲酮（HMB）、双酚A （BPA）、双酚AF、3-（羟基硅基）-1-丙磺酸（THSP）、全氟-2-甲基-3-草己酸（R(F)- cooh）等多种客体分子有效地包封在R(F)- vm - sio2 /滑石复合材料芯中，从而得到相应的氟化纳米复合材料。R(F)-VM-SiO2/滑石复合材料包覆HMB和BPA等低分子量芳香族化合物，表面表现出超亲油-超疏水特性；而R(F)-VM-SiO2/滑石复合包封的THSP和R(F)-COOH在改性表面表现出超疏油-超亲水的特性。在这些纳米复合材料中，R(F)-VM-SiO2/滑石粉/THSP复合材料适用于聚酯织物的表面改性，改性后的聚酯织物表面具有超疏油-超亲水特性，可用于油（十二烷）/水分离膜。此外，在类似的条件下，还可以制备R(F)-VM-SiO2/滑石复合材料-微米级可控交联聚苯乙烯颗粒，并将所获得的白色复合颗粒粉末应用于柱层析分离油包水（W/O）乳液的填料。
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.