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SUPERHYDROPHOBICITY, UV PROTECTION AND OIL/WATER SEPARATION PROPERTIES OF FLY ASH/TRIMETHOXY(OCTADECYL)SILANE COATED COTTON FABRICS
Carbohydrate Polymers ( IF 11.2 ) Pub Date : 2018-09-12 , DOI: 10.1016/j.carbpol.2018.08.145
Muhammad Zaman Khan , Vijay Baheti , Jiri Militky , Azam Ali , Martina Vikova

The presented study proposed simple and low-cost approach for improvement in UV protection and superhydrophobic properties of cotton fabrics by coating of mechanically activated fly ash particles. The maximum UV blocking was observed for 3 wt% fly ash, where UV transmittance decreased from 14.19% of untreated fabric to 0.11% of coated fabric. After subsequent treatment of Trimethoxy(octadecyl)silane (OTMS) on fly ash coated fabrics, the water contact angle was increased to 143°, 147° and 153° for fly ash concentration of 1, 2 and 3 wt% respectively. From Cassie-Baxter theories, the unwetted fraction of air pockets were estimated to be 43%, 55% and 67% respectively for 1, 2 and 3 wt% of fly ash particles. Furthermore, the coated fabrics showed great potentials for separation of floating oil layer, underwater oil droplet or oil/water mixture. The separation efficiency of 98%, 96%, 97% and 95% was obtained for selected model oils toluene, n-hexane, chloroform and petro ether, respectively.



中文翻译:

粉煤灰/三羟甲基(十八烷基)硅烷包覆的棉织物的超疏水性,紫外线防护和油/水分离特性

提出的研究提出了一种简单而低成本的方法,通过涂覆机械活化的粉煤灰颗粒来改善棉织物的紫外线防护和超疏水性能。对于3重量%的粉煤灰,观察到最大的紫外线阻隔,其中紫外线透射率从未处理的织物的14.19%降低到涂覆的织物的0.11%。在粉煤灰涂覆的织物上随后对三甲氧基(十八烷基)硅烷(OTMS)进行处理后,对于粉煤灰浓度分别为1、2和3 wt%的水接触角分别增加到143°,147°和153°。根据Cassie-Baxter理论,对于1、2和3 wt%的粉煤灰颗粒,气袋的未润湿部分估计分别为43%,55%和67%。此外,涂覆的织物显示出分离浮油层,水下油滴或油/水混合物的巨大潜力。

更新日期:2018-09-13
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