Abstract:A novel method to prepare durable superhydrophobic fabrics through pre‐applying an alkyl silane (alkyl chain longer than C15) onto fabric substrate and by subsequent vacuum plasma treatment in argon is reported. The treated fabrics show a contact angle of 154.2° with low contact angle hysteresis (sliding angle 4.5°). The coatings are durable and can withstand 150 cycles of standard laundries. The argon plasma treatment is found to significantly enhance SiOSi bonding among the silane molecules, leading to a h… Show more
“…In our recent work, we have developed a novel method for preparing durable superhydrophobic fabrics using silane with long alkyl chain as material . We found that argon plasma could significantly stabilize silane coating and form a durable superhydrophobic layer on substrates.…”
A novel method for preparing durable superamphiphobic fabrics is reported, which involves preapplying a solution consisting of perfluoroalkyl acrylate, epoxide-containing silane, and silica nanoparticles onto fabric and subsequent argon-plasma treatment. The coated fabrics show superphobic to both water and oil fluids (surface tension >21.5 mN m ). The coating is durable to withstand repeated laundries and multicycles of abrasion without apparently altering the superamphiphobicity. The coating is also very stable in boiling water, strong acid, and base, but has little effect on the fabric handle and air permeability. The argon-plasma-enhanced coating may offer a facile way to prepare durable superamphiphobic fabrics.
“…In our recent work, we have developed a novel method for preparing durable superhydrophobic fabrics using silane with long alkyl chain as material . We found that argon plasma could significantly stabilize silane coating and form a durable superhydrophobic layer on substrates.…”
A novel method for preparing durable superamphiphobic fabrics is reported, which involves preapplying a solution consisting of perfluoroalkyl acrylate, epoxide-containing silane, and silica nanoparticles onto fabric and subsequent argon-plasma treatment. The coated fabrics show superphobic to both water and oil fluids (surface tension >21.5 mN m ). The coating is durable to withstand repeated laundries and multicycles of abrasion without apparently altering the superamphiphobicity. The coating is also very stable in boiling water, strong acid, and base, but has little effect on the fabric handle and air permeability. The argon-plasma-enhanced coating may offer a facile way to prepare durable superamphiphobic fabrics.
“…3c , the characteristic peaks of the coating before modification were observed at 916 cm −1 for the -CH(O)CH- groups of ER, 1095 cm −1 for the Si-O-Si groups of SiO 2 and 1646 cm −1 for the C=O groups of polyamide (PA) 54 . In addition, after modification, the Si-O-Si (1095 cm −1 ), -CH2- (2850 cm −1 ) and -CH3 (2920 cm −1 ) stretching vibrations became stronger than those in the unmodified coating, thereby demonstrating that the coating was successfully modified with DTMS 42 , 55 . Figure 3 Chemical compositions of the coatings.…”
Section: Resultsmentioning
confidence: 97%
“…However, fluoro-containing compounds are expensive and harmful to the environment and human health 39 – 41 . Therefore, fluorine-free compounds that are inexpensive and environmentally friendly, such as alkyl silanes and long carbon chain organics, have been developed for the fabrication of superhydrophobic surfaces 42 – 44 . Furthermore, noxious organic solvents are often used to prepare coating suspensions during the fabrication of superhydrophobic surfaces, which is environmentally hazardous.…”
Superhydrophobic surfaces have great potential for application in self-cleaning and oil/water separation. However, the large-scale practical applications of superhydrophobic coating surfaces are impeded by many factors, such as complicated fabrication processes, the use of fluorinated reagents and noxious organic solvents and poor mechanical stability. Herein, we describe the successful preparation of a fluorine-free multifunctional coating without noxious organic solvents that was brushed, dipped or sprayed onto glass slides and stainless-steel meshes as substrates. The obtained multifunctional superhydrophobic and superoleophilic surfaces (MSHOs) demonstrated self-cleaning abilities even when contaminated with or immersed in oil. The superhydrophobic surfaces were robust and maintained their water repellency after being scratched with a knife or abraded with sandpaper for 50 cycles. In addition, stainless-steel meshes sprayed with the coating quickly separated various oil/water mixtures with a high separation efficiency (>93%). Furthermore, the coated mesh maintained a high separation efficiency above 95% over 20 cycles of separation. This simple and effective strategy will inspire the large-scale fabrication of multifunctional surfaces for practical applications in self-cleaning and oil/water separation.
“…Stability in the refractive index of the APSs is dependent on the wettability of the liquids on APSs. According to current reports [32,33], the combination of surface roughness and low-surface-energy materials is responsible for wettability. Through the alkylated and fluorinated modification, low-surface-energy was successfully endowed for SiO 2 nanospheres.…”
Amorphous photonic structures with non-iridescent and highly-stable structural color were fabricated via a simple one-step spray-coating technique. With this strategy, the obtained films on textile substrates presented short-ordered and amorphous photonic structures (APSs) similar to the amorphous nanostructures of avian feathers. The structural color presented the same hue when viewed at different angles and could be well controlled by varying the diameters of the SiO2 nanospheres. The prepared fabrics with structural color exhibited high color stability due to stability in both the assembled physical structure and the refractive index. The high stability of the assembled physical structure was attributed to the cementing effect of Poly(methylmethacrylate-butylacrylate) P(MMA-BA) existing between textile substrate and SiO2 nanospheres and among SiO2 nanospheres, while the high stability in the refractive index was contributed by the liquid-resistance achieved by both the surface roughness and the low-surface-energy of the as-sprayed APSs. With the resistances to external forces and liquid invasion, the non-iridescent brilliant structural color of the as-prepared fabrics could be kept steady. In this study, an approach of fabricating APSs with non-iridescent and stable structural color was established to enhance its potential application in structural coloration of textiles, and other color-related smart textiles.
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