Fabrication of durable superhydrophobic coating on fabrics surface for oil/water separation

Abstract

A superhydrophobic fabric coating with hierarchical structure was fabricated by a dip coating, in which dodecyltrimethoxysilane (DTMS)‐modified alumina (Al2O3) was used as modifier and polydimethylsiloxane (PDMS) as additive. The effects of the amounts of Al2O3 nano‐sized particles and PDMS on the water contact angle (WCA) and the sliding angle (SA) of the as‐prepared fabrics coating samples were studied. The surface morphology of the as‐prepared samples was characterized by SEM, and the abrasion resistance and chemical resistance experiments were performed by abrasion resistance test, tape tear test, and chemical soaking test. The results show that WCA and SA of the superhydrophobic fabrics coating are 158° and 6°, respectively. With the increasing addition of PDMS, the abrasion resistance of hydrophobic fabrics coating is improved. The WCA value of the as‐prepared fabrics coating is still >150° after five abrasion cycles. The obtained fabrics exhibit excellent superhydrophobicity and oleophilicity due to the hydrophobic modification of DTMS for Al2O3 nano‐sized particles. And the separation efficiency of the as‐prepared superhydrophobic fabrics coating for n‐dodecane and water system can reach 99.98%. POLYM. COMPOS., 2018. © 2018 Society of Plastics Engineers

Recent Advances in Multifunctional Mechanical–Chemical Superhydrophobic Materials

“…Tape peeling ( Figure 3B ) ( Wu et al, 2017a ; Zhang et al, 2018 ; Ghasemlou et al, 2019 ; Ji et al, 2019 ) is one of the easiest ways to determine the surface abrasion resistance of superhydrophobic materials, which is to fully contact the tape with the surface of the tested material under a certain pressure, and then peel off at a certain angle and speed. This method is mainly used to test the adhesion strength of superhydrophobic coating and its rough structure to substrate.…”

Recent developments in preparation, properties, and applications of superhydrophobic textiles

“…In fact, many researchers employed dip coating of PDMS, TEOS, and silane compounds in preparation of the superhydrophobic fabrics, [38][39][40][41][42][43][44][45] due to the fact that these compounds could provide the desired functions and could be easily employed in the dip coating processes. The superhydrophobic textiles, unlike other materials, need to be washed in most practical applications.…”

Investigation of Superhydrophobic and Anticorrosive Epoxy Films with Al2O3 Nanoparticles on Different Surfaces

“…The first procedure is to produce hierarchical micro–nano roughness on the hydrophobic surfaces, and the other one is to make modifications to the rough surface to lower the surface free energy using silicones, fluorocarbons etc. − In recent years, the addition of inorganic metal oxide nanoparticles like SiO 2 , TiO 2 , Al 2 O 3 etc. to polymeric matrix is an easy and practical method to create multi-scale roughness to enhance the superhydrophobicity. − Alumina (Al 2 O 3 ) nanoparticles are one of the important materials that are utilized for creating superhydrophobic surfaces. ,− Barron et al used unmodified and chemically modified alumina nanoparticles. They used the carboxylic acids for modification on nanoparticles and investigated the effects of carbon chain lengths and branching factors on the surface modification of nanoparticles.…”

“…Ji et al investigated the effects of the content of alumina and PDMS on the contact angle of cotton fabrics. The obtained fabrics had excellent superhydrophobicity and self-cleaning properties …”