Abstract
Superhydrophobic coatings have been applied in various fields. The materials used in the preparation of superhydrophobic coatings have attracted the attention of scholars. Due to the harm of fluorine-containing substances with low surface energy to the environment, fluorine-free superhydrophobic coatings have become a hotspot in the research field. Herein, a fluorine-free superhydrophobic coating with oil/water separation was made by a solution immersion way. The fluorine-free copolymer and polydimethylsiloxane (PDMS)/SiO2 nanoparticles (NPs) were mixed to prepare a composite solution, and the superhydrophobic surface was obtained on the paper by a dipping method. The scanning electron microscope, x-ray photoelectron spectrometer, 1H nuclear magnetic resonance, and Fourier transform infrared were used to study the surface characteristics and structural composition of the superhydrophobic material. The research proved that the copolymer and PDMS/SiO2 NPs were successfully coated on the paper surface, and the rough structure of the superhydrophobic surface was also attributed to the introduction of the copolymer and PDMS/SiO2 NPs. The evaluation of the coating has proved its excellent hydrophobicity, oil/water separation performance, and self-cleaning performance. The coating is a sustainable and environmentally friendly superhydrophobic material that can be used in packaging, construction, petrochemical, and other industries.
Highlights
The discharge of industrial oily wastewater is an environmental problem, which may lead to waste of water resources, economic losses, and even serious health hazards.1 Researches have demonstrated that the preparation of functional materials that effectively separate oil and water can solve the problem of wastewater discharge.2 The superhydrophobic coatings have excellent oil/water separation performance,3–5 self-cleaning,6 anti-icing,7 anti-corrosion,8–10 and catalysis function,11,12 which can be used for industrial oily wastewater treatment
In order to study the influence of the copolymer and PDMS/SiO2 NPs on paper surface morphology, the microscopic surface of the original paper, modified paper coated with the copolymer, and the modified paper coated with copolymer–PDMS/SiO2 NPs was observed and analyzed through SEM images
Compared with base paper and paper coated with the copolymer, the modified paper impregnated with copolymer–PDMS/SiO2 NPs has a rougher morphological surface, which is attributed to the successful coating of the copolymer and PDMS/SiO2 NPs on the paper surface [Figs. 2(g)–2(i)]
Summary
The discharge of industrial oily wastewater is an environmental problem, which may lead to waste of water resources, economic losses, and even serious health hazards. Researches have demonstrated that the preparation of functional materials that effectively separate oil and water can solve the problem of wastewater discharge. The superhydrophobic coatings have excellent oil/water separation performance, self-cleaning, anti-icing, anti-corrosion, and catalysis function, which can be used for industrial oily wastewater treatment. The superhydrophobic coatings have excellent oil/water separation performance, self-cleaning, anti-icing, anti-corrosion, and catalysis function, which can be used for industrial oily wastewater treatment. Chen et al introduced that a superhydrophobic coating net with excellent oil/water separation ability was prepared by fluorinated silica (F–SiO2) and polydimethylsiloxane (PDMS).. Yogapriya et al elaborated that the hydrophobic/superlipophilic nanoporous composite material was synthesized using the copper-based metal organic framework supported by multilayer fluorinated graphene (FG) nanosheets, which had excellent stability.42 These superhydrophobic materials are made of fluorine-containing materials, which are expensive and cause a certain degree of harm to the environment. Zhang et al developed a superhydrophobic film with oil/water separation characteristic on the surface of aluminum alloy by the hydrothermal method.. A fast and convenient solution impregnation method was developed to prepare a superhydrophobic coating with oil/water separation and self-cleaning properties. This work proves a new and convenient way to construct fluorine-free superhydrophobic coatings, which can be used in antifouling and petrochemical industries
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
