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Amphiphobic PFTMS@nano-SiO2/ePTFE Membrane for Oil Aerosol Removal
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-07-27 , DOI: 10.1021/acs.iecr.8b02385 Chong Xu 1 , Jian Fang 1 , Ze-Xian Low 2 , Shasha Feng 1 , Min Hu 1 , Zhaoxiang Zhong 1 , Weihong Xing 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-07-27 , DOI: 10.1021/acs.iecr.8b02385 Chong Xu 1 , Jian Fang 1 , Ze-Xian Low 2 , Shasha Feng 1 , Min Hu 1 , Zhaoxiang Zhong 1 , Weihong Xing 1
Affiliation
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Synthetic expanded polytetrafluoroethylene (ePTFE) membrane has a wide range of applications, including aerosol and dust removal, and exhibits high dust-removing efficiency, high air permeability, and cost-effectiveness. However, the intrinsic oleophilic surface of ePTFE limits its application in the oil-bearing gas–solid separation process. Herein, we report a surface modification method to prepare amphiphobic ePTFE membranes via coating of a layer of 1H,1H,2H,2H-perfluorooctyltrimethoxysilane (PFTMS) – modified nano-SiO2 onto the surface of ePTFE fibers. The oil contact angle of the modified ePTFE membranes was increased from 0 to 123°, while retaining the initial water contact angle of 142°. The amphiphobic membrane shows excellent oil aerosol filtration efficiency with a comparative low pressure drop and high oil rejection rate of 99.5%. Remarkably, the membrane can be reused after simple rinsing with water. The oil aerosol filtration efficiency of membrane remained as high as 98.5% after five cycles of filtration and cleaning.
中文翻译：
两性PFTMS @ nano-SiO 2 / ePTFE膜，用于去除油雾
合成膨胀聚四氟乙烯（ePTFE）膜具有广泛的应用，包括气溶胶和除尘，并且具有很高的除尘效率，高透气性和成本效益。但是，ePTFE的固有亲油性表面限制了其在含油气固分离过程中的应用。在这里，我们报告一种表面改性方法，该方法通过涂覆一层1H，1H，2H，2H-全氟辛基三甲氧基硅烷（PFTMS）–改性的纳米SiO 2来制备两亲性ePTFE膜到ePTFE纤维的表面上。改性的ePTFE膜的油接触角从0增加到123°，同时保持142°的初始水接触角。该两性膜显示出优异的油雾过滤效率，具有相对较低的压降和99.5％的高拒油率。值得注意的是，在用水简单冲洗后，该膜可以重复使用。经过五个过滤和清洁循环后，膜的油雾过滤效率保持高达98.5％。
更新日期：2018-07-28
中文翻译：
两性PFTMS @ nano-SiO 2 / ePTFE膜，用于去除油雾
合成膨胀聚四氟乙烯（ePTFE）膜具有广泛的应用，包括气溶胶和除尘，并且具有很高的除尘效率，高透气性和成本效益。但是，ePTFE的固有亲油性表面限制了其在含油气固分离过程中的应用。在这里，我们报告一种表面改性方法，该方法通过涂覆一层1H，1H，2H，2H-全氟辛基三甲氧基硅烷（PFTMS）–改性的纳米SiO 2来制备两亲性ePTFE膜到ePTFE纤维的表面上。改性的ePTFE膜的油接触角从0增加到123°，同时保持142°的初始水接触角。该两性膜显示出优异的油雾过滤效率，具有相对较低的压降和99.5％的高拒油率。值得注意的是，在用水简单冲洗后，该膜可以重复使用。经过五个过滤和清洁循环后，膜的油雾过滤效率保持高达98.5％。
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