Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/poly(tetrafluoroethylene) nanocomposites possessing a superoleophilic/superhydrophobic characteristic: application to the separation of oil and water
Preparation of fluoroalkyl end-capped vinyltrimethoxysilane oligomeric silica/poly(tetrafluoroethylene) nanocomposites possessing a superoleophilic/superhydrophobic characteristic: application to the separation of oil and water
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DOI：
10.1007/s10971-016-4209-7
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发表时间：
2017-02
影响因子：
2.5
通讯作者：
Jun-ichi Suzuki;Yutaro Takegahara;Yuri Oikawa;Masaya Chiba;Satoshi Yamada;Masashi Sugiya;H. Sawada
中科院分区：
文献类型：
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作者：
Jun-ichi Suzuki;Yutaro Takegahara;Yuri Oikawa;Masaya Chiba;Satoshi Yamada;Masashi Sugiya;H. Sawada
氟烷基封端的乙烯基三甲氧基硅烷低聚物[Rf-(CH2CHSi(OMe)3)n-Rf；Rf= Cf(CF3)OC3F7，n= 2，3：Rf-(Vm)n-Rf]在碱性条件下，在聚四氟乙烯微粒的存在下发生溶胶-凝胶反应，得到相应的含氟低聚二氧化硅/聚四氟乙烯纳米复合材料[Rf-(Vm-SiO_3/2)n-Rf/聚四氟乙烯纳米复合材料]。有趣的是，用所获得的纳米复合材料处理的改性玻璃、聚四氟乙烯片材和滤纸表面表现出超亲油/超疏水特性，尽管原始的聚四氟乙烯片材和经热-(VM)n-RF型低聚二氧化硅纳米颗粒[RF-(Vm-SiO_3/2)n-RF]处理的改性玻璃表面分别能够提供通常的憎油/疏水和疏油/超疏水性能。将改性后的滤纸应用于油水混合物分离膜中。此外，还将制得的含氟聚四氟乙烯纳米复合白色粉末应用于柱层析填料中，用于分离油水混合物和油包水乳状液。我们还研究了目前的纳米复合微粉作为分离油/水混合物和油包水乳状液的填料的可重用性，即使在类似的条件下，使用5次后也能定量分离无色油。
AbstractFluoroalkyl end-capped vinyltrimethoxysilane oligomer [RF-(CH2CHSi(OMe)3)n-RF;RF= CF(CF3)OC3F7,n= 2, 3:RF-(VM)n-RFoligomer] can undergo the sol–gel reaction in the presence of poly(tetrafluoroethylene) fine particles under alkaline conditions to afford the corresponding fluorinated oligomeric silica/poly(tetrafluoroethylene) nanocomposites [RF-(VM-SiO3/2)n-RF/poly(tetrafluoroethylene) nanocomposites]. Interestingly, the modified glass, poly(tetrafluoroethylene) sheet and filter paper surfaces treated with the obtained nanocomposites were found to exhibit a superoleophilic/superhydrophobic characteristic, although the original poly(tetrafluoroethylene) sheet and the modified glass surface treated with theRF-(VM)n-RFoligomeric silica nanoparticles [RF-(VM-SiO3/2)n-RF] can provide the usual oleophobic/hydrophobic and oleophobic/superhydrophobic properties, respectively. The modified filter paper was applied to the separation membrane for the mixture of oil/water. In addition, the fluorinated poly(tetrafluoroethylene) nanocomposite white-colored powders thus obtained were applied to the packing material for the column chromatography to separate the mixture of oil/water and water-in-oil emulsions. We have also studied on the reusability of the present nanocomposite particle powders as the packing material for the separation of not only the mixture of oil/water but also the water-in-oil emulsions, and the colorless oil was quantitatively isolated under similar conditions even after the use of the packing materials five times.Graphical Abstract