Robust superhydrophobic coating with hollow SiO2/PAA-b-PS Janus microspheres for self-cleaning and oil–water separation

Bao, Yan; Chang, Jingxiang; Zhang, Yuanxia; Chen, Lu

doi:10.1016/j.cej.2022.136959

Cited by 83 publications

(29 citation statements)

References 66 publications

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“…Through a series of studies, the reusability of the SSM@HKUST-1 membranes was further demonstrated from anti-oil-fouling, self-cleaning, and recyclability tests. Since the separation membranes coming into contact with oil during oil–water separation, oil is easily contaminated by the membranes and blocks the hole, which is a common issue that has to be solved. , Many times, oils and organic solvents will adhere to the membrane’s surface or seep into its internal pores, which affect the membrane’s porosity and then decreases the separation efficiency and permeation flux of the material. , Due to the special UWSHL property of HKUST-1, the SSM@HKUST-1 membrane exhibits excellent self-cleaning and anti-fouling properties. ,, We chose rapeseed oil (dyed red by Sudan red) and crude oil with high viscosity to verify the self-cleaning capacity of SSM@HKUST-1 by a number of anti-fouling tests (Figure ). The surface of SSM@HKUST-1 was free of fouling or adherence of the coating oil and stayed clean underwater when immersed in a solution of rapeseed oil and water or crude oil and water, as illustrated in Figure a,b and Movies S4 and S5.…”

Section: Resultsmentioning

confidence: 99%

Underwater Superoleophobic and Underoil Superhydrophilic Copper Benzene-1,3,5-tricarboxylate (HKUST-1) Mesh for Self-Cleaning and On-Demand Emulsion Separation

Ding

et al. 2023

Langmuir

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Surfaces with underoil superhydrophilic (UOSHL) and underwater superoleophobic (UWOHB) have great potential for on-demand emulsion separation. However, the fabrication of underoil superhydrophilic based on wetting thermodynamic principles is quite challenging. Several previous studies have shown that some sarcocarps are able to spontaneously absorb water to moisturize themselves and have a unique UOSHL ability. By mimicking this unique ability of the sarcocarp, an outstanding UWOHB and UOSHL membrane was prepared. We choose 2300 mesh stainless steel mesh (SSM) as the substrate, then grow Cu and Cu(OH) 2 on SSM by a simple electrochemical method, and finally grow HKUST-1 crystals via a fast in situ growth method. The whole preparation process is simple, low cost, and does not require complex and long-term hydrothermal reactions. By growing HKUST-1 crystals, the prepared surface successfully achieved the required UOSHL and UWOHB properties. When the water droplets come into contact with the membrane under n-hexane, it will diffuse and can completely spread out in 2 s. The as-prepared membrane exhibits outstanding anti-fouling and self-cleaning properties for rapeseed oil and crude oil with high viscosity underwater due to the special wetting. By prewetting the surface with an appropriate amount of the dispersion medium, it can rapidly and efficiently on-demand separate different emulsions. The separation efficiencies of water-in-oil emulsions and oil-in-water emulsions are above 99.00 and 97.00%. With their outstanding performance in self-cleaning, on-demand emulsion separation, low cost, and fast preparation, the as-prepared UOSHL and UWOHB HKUST-1 meshes show excellent potential for treating oily wastewater in practical applications. ■ HIGHLIGHTThe whole preparation process is fast and environmentally friendly. The membrane can absorb water like the natural sarcocarps. There are underwater superoleophobic and underoil superhydrophilic on the prepared membrane. The membrane can achieve on-demand emulsion separation and has outstanding anti-fouling and selfcleaning properties.

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Section: Resultsmentioning

confidence: 99%

Underwater Superoleophobic and Underoil Superhydrophilic Copper Benzene-1,3,5-tricarboxylate (HKUST-1) Mesh for Self-Cleaning and On-Demand Emulsion Separation

Ding

et al. 2023

Langmuir

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“…Graft copolymerization is the grafting of low surface energy substances on the material surface in the form of covalent bonds through chemical reactions, thus improving the hydrophobicity of the material [ 30 , 31 ]. The surface of wood contains a large number of reactive groups such as hydroxyl and carboxyl groups, which create the necessary conditions for graft copolymerization reactions.…”

Section: The Preparation Of Superhydrophobic Coatings On Woodmentioning

confidence: 99%

Recent Advances in Superhydrophobic Surfaces and Applications on Wood

Wei

Niu

2023

Polymers

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Superhydrophobic substances were favored in wood protection. Superhydrophobic treatment of wood is of great significance for improving the service life of wood and expanding its application fields, such as improving dimensional stability, durability, UV stability, and reducing wetting. The superhydrophobic phenomenon is attributed to the interaction of micro/nano hierarchical structure and low surface energy substances of the wood surface. This is the common method for obtaining superhydrophobic wood. The article introduces the common preparation methods of superhydrophobic wood material coatings and their mechanisms. These techniques include lithography, sol–gel methods, graft copolymerization, chemical vapor deposition, etc. The latest research progress of superhydrophobic wood material coatings application at domestic and overseas is reviewed, and the current status of superhydrophobic coating application in wood materials and construction is summarized. Finally, superhydrophobic on wood in the field of applied research is presented, and the development trend in the field of functional improvement of wood is foreseen.

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“…[31,32] However, it was reported that the superhydrophobic materials prepared by most methods have poor abrasion resistance when damaged by external pollution or external force, which greatly limited the development and application of superhydrophobic materials. [33][34][35][36][37] In order to solve these problems, plenty of scholars have proposed different methods to improve the abrasion resistance of superhydrophobic surfaces, [38][39][40] such as reasonably designing the micro-nano structures and selecting materials, [41][42][43] optimizing the preparation process, [44,45] and the proportion of materials. [46][47][48][49][50] Although researches improving superhydrophobic abrasion resistance have made considerable progress, there are still many shortcomings, such as the lack of widespread applications.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances on the Abrasion Resistance Enhancements and Applications of Superhydrophobic Materials

Yang

Yuan

Liu

et al. 2023

The Chemical Record

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Researches on superhydrophobicity have been overwhelming and have shown great advantages in various fields. However, the abrasion resistance of superhydrophobic structures was usually poor, and they were easily damaged by external force or harsh environment, which greatly limited the applications of superhydrophobic surfaces. Much attention has been paid to improving the abrasion resistance of superhydrophobic materials by researchers. In this review, aimed at the advances on improving the abrasion resistance of superhydrophobic surfaces, it was summarized and compared three enhancement strategies including the reasonably design of micro‐nano structures, the adoption of adhesives, and the preparation of self‐healing surface. Finally, the applications of typical superhydrophobic materials with abrasion resistance were reviewed in various fields. In order to broaden the application fields of superhydrophobic materials, the abarasion resistance should be further improved. Therefore, we proposed the ideas for the future development of superhydrophobic materials with higher abrasion resistance. We hope that this review will provide a new approach to the preparation and development of stable superhydrophobic surfaces with higher abrasion resistance.

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Robust superhydrophobic coating with hollow SiO2/PAA-b-PS Janus microspheres for self-cleaning and oil–water separation

Cited by 83 publications

References 66 publications

Underwater Superoleophobic and Underoil Superhydrophilic Copper Benzene-1,3,5-tricarboxylate (HKUST-1) Mesh for Self-Cleaning and On-Demand Emulsion Separation

Underwater Superoleophobic and Underoil Superhydrophilic Copper Benzene-1,3,5-tricarboxylate (HKUST-1) Mesh for Self-Cleaning and On-Demand Emulsion Separation

Recent Advances in Superhydrophobic Surfaces and Applications on Wood

Recent Advances on the Abrasion Resistance Enhancements and Applications of Superhydrophobic Materials

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