One-Step Fabrication of Non-Fluorinated Transparent Super-Repellent Surfaces with Tunable Wettability Functioning in Both Air and Oil

Abstract

In this paper, we have developed a one-step thermal treatment of polydimethylsiloxane (PDMS) liquid to create transparent super-repellent surface (TSS) and super-repellent powder. They are super-repellent toward water and ethylene glycol. During the one-step thermal treatment, PDMS soot is generated and deposited onto a glass slide (GS) surface to fabricate the TSS without fluorosilane modification. The facilely obtained TSS presented superhydrophobicity and self-cleaning property when immersed into very low surface tension oils such as petroleum ether, hexadecane, peanut oil, and dodecane. Interestingly, by controlling heating time and temperature, wettability of the treated GS surface and the remained white powder can be regulated. The mechanism of tunable wettability was revealed and analyzed by investigating the variations of surface morphology and chemical composition. More importantly, TSS was able to repel highly corrosive aqua regia and saturated NaOH solutions. TSS maintained excellent superhydrophobicity even after chemical and mechanical damages. This simple thermal deposition method was also applicable for other thermally stable substrates to achieve super-repellency, which are believed to find very promising applications.

Facile Fabrication of a PDMS@Stearic Acid-Kaolin Coating on Lignocellulose Composites with Superhydrophobicity and Flame Retardancy

“…Up to now, a variety of methods have been developed to fabricate superhydrophobic surfaces on wood-based materials, such as hydrothermal treatment [ 7 , 8 ], sol-gel method [ 9 , 10 ], dip or spray-coating [ 11 , 12 , 13 , 14 ], soft lithography [ 15 , 16 ], “paint + adhesive” method [ 17 , 18 ], and so on. Among “paint + adhesive” methods, PDMS as adhesive has been successfully used to fabricate various robust and durable superhydrophobic surfaces [ 19 , 20 , 21 ]. However, there are few studies on the fabrication of lignocellulose composites superhydrophobic coatings.…”

One-Step Fabrication of Hot-Water-Repellent Surfaces

“…For T d = 450 °C, the C-H bond disappeared. A higher content of the C-H bond leads to a lower surface energy [ 24 , 25 ], indicating that the surface energy of designed surfaces can be regulated by the deposition temperature.…”

Colorful superhydrophobic materials with durability and chemical stability based on kaolin

“…These results demonstrate that the prepared materials have lower adhesiveness for waste water, which can be applied to antifouling applications. Superhydrophobic surfaces not only display an excellent repellency to ordinary daily liquids such as ink, tea, and coffee, but also minimize fungus adhesion, which essentially prevents the growth of biofilms, known as biofouling 37–42 . As shown in Figure 7E, the green superhydrophobic fabric was exposed to molds species and no growth over its surface in spite of providing favorable conditions for growth.…”