Superhydrophobicity, UV protection and oil/water separation properties of fly ash/Trimethoxy(octadecyl)silane coated cotton fabrics. (15th December 2018)

• Record Type: Journal Article
• Authors: Khan, Muhammad Zaman; Baheti, Vijay; Militky, Jiri; Ali, Azam; Vikova, Martina
• Is Part Of: Carbohydrate polymers. Volume 202(2019)
• Page Start: 571
• Page End: 580
• Publication Date: 2018-12-15
• Subjects: Fly ash particles -- Cotton fabric -- Superhydrophobicity -- UV protection -- Oil water separation; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2018.08.145
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Mechanically activated the fly ash particles by ball milling process. 3 wt% fly ash coated cotton fabric exhibited 0.11% transmission in UV-region. Superhydrophobization of fly ash coated cotton fabrics by OTMS coating. 3 wt% fly ash-OTMS coated cotton fabric exhibited 153° contact angle. 3 wt% fly ash-OTMS coating depicted 3300% oil (i.e. chloroform) absorption capacity. Abstract: 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.