Mechanically robust superhydrophobic coating from sawdust particles and carbon soot for oil/water separation

Zulfiqar, Usama; Hussain, Syed Zajif; Subhani, Tayyab; Hussain, Irshad; Habib-ur-Rehman, _

doi:10.1016/j.colsurfa.2017.12.047

Cited by 67 publications

(30 citation statements)

References 41 publications

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“…Polydimethylsiloxane is inherently hydrophobic (Zulfiqar et al 2018), and its surface is often modified for increased surface roughness or surface activation (Martin and Bhushan 2017). For the PDMS-modified wood sample, the band located at approximately 3364 cm -1 decreased after treatment and verified that PDMS improved the wood repellency.…”

Section: Surface Hydrophobicitymentioning

confidence: 98%

Effect of Hydrophobic Modification on Mechanical Properties of Chinese Fir Wood

et al. 2018

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The water repellency, elastic modulus, and hardness of hydrophobictreated and untreated wood cell walls were investigated. Chinese fir (CF; Cunninghamia lanceolata (Lamb.) Hook) wood was modified using polydimethylsiloxane (PDMS) and dimethyldichlorosilane (DMDCS) dissolved in n-hexane at 2%, 5%, and 8% (w/w) for 5 min, 30 min, and 2 h, respectively. A hydrophobic property was observed in the modified wood. The water contact angle value of the untreated wood surface was 85°, but after treatment this value increased to 147° and 143° for the PDMS-and DMDCS-treated wood, respectively. Increases in the elastic modulus and hardness of the wood cell wall were observed after PDMS treatment. These treatments also improved the water repellency of the wood surface, as verified by the reduction of the hydroxyl group O-H stretching vibrations at 3328 cm -1 . Compared to DMDCS, the PDMS treatment improved the hydrophobicity of wood surfaces and increased the nanomechanical properties of the wood cell wall. When an 8% concentration of PDMS and a 2 h treatment time were used, the treated wood showed the best mechanical properties.

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Section: Surface Hydrophobicitymentioning

confidence: 98%

Effect of Hydrophobic Modification on Mechanical Properties of Chinese Fir Wood

et al. 2018

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“…Similar to the adhesive‐mediated durable membranes, the use of covalent‐bonding‐based superwettable coatings involving various immobilized hydrogels/aggregates/complexes/particles and building blocks on porous 2D or 3D macroscopic substrates is regarded as a popular strategy for reducing damage arising from abrasion. Recently, several membranes have been developed with improved mechanical (abrasion‐resisting) robustness for the separation of oil–water mixtures . Based on a one‐step alkaline‐induced phase‐inversion process, a robust polyionized sodium polyacrylate‐grafted poly(vinylidene fluoride) (PAAS‐ g ‐PVDF) hydrogel‐coated nonwoven fabric was prepared by Gao et al and used for the separation of immiscible oil–water mixtures.…”

Section: Robust Superwettable Membranes For Oil–water Separationmentioning

confidence: 99%

“…After moving forward 965 cm, the WCAs of the resultant surface ranged from 153° to 166°, and the SAs varied between 4° and 7°, indicating superior wearability, despite the 251.2 µm thickness loss (Figure c) . Micro/nanoparticles are the most popular building blocks for superwettable surfaces, and assembled membranes with enhanced mechanical‐abrasion‐resistant properties and performance have been extensively developed …”

Section: Robust Superwettable Membranes For Oil–water Separationmentioning

confidence: 99%

“…Apart from the previously mentioned linear abrasion treatment, where the superwettable surface of membrane was positioned face‐down on sandpaper, sand‐flow‐based multidirectional attack abrasion test has also been employed to examine mechanical stability, as illustrated in Figure a . Based on the related literature, water‐jet‐based abrasion tests are rarely conducted for the characterization of permeable superwettable membranes compared to that of impermeable solid surfaces.…”

Section: Robust Superwettable Membranes For Oil–water Separationmentioning

confidence: 99%

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Recent Advances in Robust Superwettable Membranes for Oil–Water Separation

Lin

Hong

2019

Adv Materials Inter

117

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Over the past decade, much progress has been made in the application of multifunctional membranes with special wettability for the separation of oil–water mixtures. This progress has been driven by frequent oil spill accidents and oily wastewater, which are enormous threats to the vulnerable aquatic environment. The design of permeable superwettable membranes for oil–water separation has been inspired by the development of highly wetting/nonwetting interfaces, but these membranes are susceptible to factors such as mechanical forces, chemical corrosion, biological fouling, and other environmental influences. Considering the complex and harsh environments that superwettable membranes must endure during the separation process, membrane durability against the loss of superwettability is critical in prolonging the life of an oil–water filtration system. Although significant advances in superwettable membranes have been made, the robustness issue remains challenging and has become a focus of many investigations. Covering nearly all publications concerning “robust, durable, usable, resistant, tolerant, or antifouling oil–water separation” published in the last five years, this work is intended as an introduction for new researchers wishing to create durable superwettable membranes for oil–water separation, as well as providing perspectives and guidance for future research in several logical directions.

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“…According to the theory of Wenzel and the Cassie-Baxter model, the hydrophobic properties of the material surface are determined by the chemical properties and the roughness of the material surface [31,32]. Silicon/fluorine materials are common low surface energy material, which has excellent properties such as weather resistance, refractory, corrosion resistance, and oxidation stability [18,[33][34][35]. However, silicon/fluorine modified coatings have the problems of high price and a complex preparation process, which limits its large-scale application.…”

Section: Introductionmentioning

confidence: 99%

Plant-Inspired Layer-by-Layer Self-Assembly of Super-Hydrophobic Coating for Oil Spill Cleanup

et al. 2019

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A versatile, facile, energy-saving, low-cost and plant-inspired self-assembly strategy was used to prepare super-hydrophobic coating in this study. Concretely, an appealing super-hydrophobicity surface was obtained by designing a molecular building block phytic acid (PA)-Fe (III) complex to anchor the substrate and hydrophobic thiol groups (HT). The facile and green modification method can be applied to variety of substrates. The as-prepared PA-Fe (III)–HT coated melamine composite sponge possesses both super-hydrophobic and superlipophilicity property. Moreover, it displays superior efficiency to separate the oil–water mixture and splendid oil spill cleanup.

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Mechanically robust superhydrophobic coating from sawdust particles and carbon soot for oil/water separation

Cited by 67 publications

References 41 publications

Effect of Hydrophobic Modification on Mechanical Properties of Chinese Fir Wood

Effect of Hydrophobic Modification on Mechanical Properties of Chinese Fir Wood

Recent Advances in Robust Superwettable Membranes for Oil–Water Separation

Plant-Inspired Layer-by-Layer Self-Assembly of Super-Hydrophobic Coating for Oil Spill Cleanup

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