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Synthesis of novel smart pH-sensitive modified silica nanoparticles for controllable oil-water separation
Surfaces and Interfaces ( IF 5.7 ) Pub Date : 2022-09-17 , DOI: 10.1016/j.surfin.2022.102346
Tawfik A. Saleh , Mauliady Satria , Danah Al Moshawer , Hasan Al Abdulgader

The newly designed superwettable polymers with external stimuli-responsive behavior have been greatly proposed a great research interest in the oil industry due to their fast and simple mechanism process. Herein, the development of the advanced silica-based pH-responsive materials linked with hydrophilic 3-(aminopropyl)triethoxysilane (APTES) and hydrophobic 1H,1H,2H,2H-perfluorooctyl-triethoxysilane (FOTS) chelating ligands have been designed for oil/water separation by a facile dip-coating process. This smart material can propose an excellent wettability conversion between superhydrophobicity-superoleophilicity and superhydrophilicity-underwater superoleophobicity, favorable stability, and durability, resulting in efficient separation for oil/water mixture. These properties were observed from the well-defined 3D porous surface of the smart materials when they were coated on the fabric surface. Furthermore, characterization described that the material compositions were chemically reacted and distributed throughout the smart fabric surface caused by the robust chemical interaction between the functional groups such as hydroxide, carboxylate, and silane. The water contact angle (pH≈10) was displayed at 167-160° and for acidic water (pH≈2) was ranging from 143-0° over 100 s denoting outstanding superhydrophobic and superhydrophilic features respectively. Underwater measurement pointed out that the smart fabric also has a great superoleophobicity for oil contact angle (150°). Moreover, the series of test results revealed a selective separation for oil/water system with efficacy > 98% and high oil flux ranging from 7200 to 7900 L.h−1.m−2 as well as water flux (5300–6200 L.h−1.m−2). Therefore, these smart materials with fabric and non-fabric preparation have a direct environmental impact on real samples and they can largely dominate various oily wastewater/oil spills clean up.



中文翻译:

用于可控油水分离的新型智能 pH 敏感改性二氧化硅纳米粒子的合成

新设计的具有外部刺激响应行为的超润湿聚合物由于其快速和简单的机理过程而在石油工业中引起了极大的研究兴趣。在此,开发了与亲水性 3-(氨基丙基)三乙氧基硅烷 (APTES) 和疏水性 1H,1H,2H,2H-全氟辛基-三乙氧基硅烷 (FOTS) 螯合配体连接的先进二氧化硅基 pH 响应材料,用于油/通过简单的浸涂工艺分离水。这种智能材料可以提供出色的润湿性超疏水-超亲油和超亲水-水下超疏油之间的转换,良好的稳定性和耐久性,实现油水混合物的高效分离。当智能材料涂覆在织物表面时,这些特性是从智能材料定义明确的 3D 多孔表面观察到的。此外,表征描述了材料成分发生化学反应并分布在整个智能织物表面,这是由于羟基、羧酸盐和硅烷. 水接触角 (pH≈10) 显示为 167-160°,酸性水 (pH≈2) 在 100 秒内为 143-0°,分别表示出色的超疏水和超亲水特性。水下测量指出,智能织物对油接触角(150°)也有很好的超疏油性。此外,一系列测试结果表明,油/水系统的选择性分离效率 > 98%,油通量从 7200 到 7900 Lh -1 .m -2以及水通量(5300-6200 Lh -1 .米-2 )。因此,这些具有织物和非织物制备的智能材料对实际样品具有直接的环境影响,它们可以在很大程度上主导各种含油废水/溢油清理。

更新日期:2022-09-17
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