Facile preparation of fluorine-free superhydrophobic/superoleophilic paper via layer-by-layer deposition for self-cleaning and oil/water separation

Li, Hui; Wang, Xin; He, Yunqing; Peng, Lincai

doi:10.1007/s10570-018-2187-3

Cited by 50 publications

(13 citation statements)

References 67 publications

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“…28 Beyond that, due to the advantages of super-wetting fabrics, sponges, and papers, such as lower cost, high adsorption performance, and easy processing, they are used as materials for separating oil-water mixtures. [29][30][31][32][33][34][35][36] However, their inherent flammability limits their applications to a large extent. In particular, when they adsorb flammable liquids, such as oils and organic solvents, they become more flammable and frightening, because most organic solvents and oils are exceedingly flammable.…”

Section: Introductionmentioning

confidence: 99%

Green fabrication of flame retardant and superhydrophobic materials with application in oil‐water separation

Luo

Wang

et al. 2021

Polymers for Advanced Techs

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Flame-retardant materials with superwettability have received broad attention and research in the field of oil-water separation in recent years. However, it remains big challenging to fabricate flame-retardant and superwettable materials in terms of the complexity and environmental performance. Herein, a non-fluorinated coating containing flame retardants phytic acid/3-aminopropyltriethoxysilane and silica micronparticle/hexadecyltrimethoxysilane was developed. The performance of the coated samples is evaluated by thermogravimetric analysis, limiting oxygen index (LOI), cone calorimetry, and, water contact angle tests. The percentage of residue at 800 C for coated samples (cotton fabric, absorbent cotton, filter paper, cottonwood, packing cardboard) was reduced by 47.6%, 42.2%, 45.5%, 53.2%, and 50.8%, respectively. However, their control samples reduced by 87.4%, 84.6%, 88.4%, 77.2%, and 72.2%, respectively, under the same conditions. The percentage of residue at 800 C for coated samples is much higher than that of the pristine samples. The coated cotton fabric showed excellent flame retardant and superhydrophobic properties. Specifically, the coated cotton fabrics exhibited self-extinguishing properties in the flame burning tests, and the LOI increased significantly from 17.7% to 50.8%. Furthermore, the peak heat release rate and the total heat release values of the coated cotton fabric were significantly declined by 83.4% and 83.6% compared to untreated cotton fabrics, respectively. Additionally, due to its super-hydrophobic surface, the coated cotton fabric exhibited super-strong self-cleaning ability and waterproof performance. The coated cotton fabrics also showed good organic solvent/oil and water separation capabilities while reducing the risk of fire.

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Section: Introductionmentioning

confidence: 99%

Green fabrication of flame retardant and superhydrophobic materials with application in oil‐water separation

Luo

Wang

et al. 2021

Polymers for Advanced Techs

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“…The prepared superhydrophobic cotton fabric could selectively absorb oil from oily water and could separate various oil/water mixtures efficiently, and it had a separation efficiency of over 98%. Li et al (2019) successfully fabricated superhydrophobic/superoleophilic papers through the combination of layer-by-layer (LBL) deposition of chitosan (CS) and hexadecyltrimethoxysilane (HMTS-g-TiO2) on the paper surface and subsequent heat treatment. The paper modified with 20 multilayers of (CS/HTMS-g-TiO2) followed by heat treatment showed superhydrophobicity with a water contact angle of 167.4° and superoleophilicity, with an oil contact angle of 0°.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of super-hydrophobic filter paper via mixed wax phase separation for efficient oil/water separation

Wang

Chen

Liang

et al. 2021

BioRes

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Despite previous eﬀorts, the fabrication of superhydrophobic substrate via an environment friendly and easy approach remains a great challenge. In this study, a low cost, simple, and green procedure was developed to prepare a superhydrophobic paper surface that is acceptable for the papermaking industry. First, a wax mixture (beeswax & carnauba wax) was emulsified and coated on the filter paper surface. Then, the coated paper was annealed at different temperatures. The further heat-treatment-rendered wax-coated paper hydrophobic or superhydrophobic because submicrometer or micrometer wax structures were present on the paper surface. The water contact angle of the annealed filter paper sample reached 151.5° at 60 °C, and the sliding angle was under 10°. Further, the relationship between surface composition and the hydrophobic properties of the coated paper samples was discussed. The obtained paper samples showed great potential in water/oil separation, as they had an efficiency over 99%. This work proposed a new simple and mild approach to fabricate superhydrophobic filter papers and explored the hydrophobicity and water/oil separation properties.

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“…Since, the last two decades, the researchers are attracted towards the fabrication of superhydrophobic surfaces because of their potential applications in self-cleaning, 4,5 oil-water separation, 6,7 anticorrosive, 8 antiscratching, 9 anti-icing, 10,11 dragreduction, 12 antibacterial, 13 and other fields. 14,15 To date, many techniques have been developed for the preparation of superhydrophobic coatings including sol-gel coating, 16 spray coating, 17 dip coating, 18 spin coating, 19 chemical vapor deposition, 20 layer-by-layer deposition, 21 and other techniques. 22,23 The high-end applications of superhydrophobic coating can be achieved by a facile, low cost, and time-saving techniques.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of robust self‐cleaning superhydrophobic coating by deposition of polymer layer on candle soot surface

Sutar

Latthe

Nagappan

et al. 2020

J of Applied Polymer Sci

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A facile and inexpensive way have been developed to fabricate robust selfcleaning superhydrophobic coating by depositing polymer layer on candle soot (CS) surface using dip coating method. The stability and robustness of the CS deposited superhydrophobic surface is much weaker due to weak interaction and nonchemical bonding with the substrate. We introduced a thin layer of polystyrene, polyethylene, polypropylene (PP), and polyvinylidene fluoride on CS surface in order to improve its mechanical properties. The fabricated surfaces with the use of respective polymers exhibited water contact angles of nearly 170, 174, 175, and 171 with sliding angles of 2, 1, 1, and 3 , respectively. Although, all the polymers used in this work exhibited excellent superhydrophobic and self-cleaning surface property, we found that the PP deposited CS surface exhibit better stability against water jet hitting and water drop impact tests. The PP deposited CS surface almost maintained their surface properties even after 50 cycles of sandpaper abrasion and 20 cycles of adhesive tape peeling tests. The mechanical durability tests confirmed that PP is a better polymer to improve the long-term durability of CS surface. Therefore, this simple, time saving, and inexpensive method for fabricating superhydrophobic coating can be used for potential industrial application.

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Facile preparation of fluorine-free superhydrophobic/superoleophilic paper via layer-by-layer deposition for self-cleaning and oil/water separation

Cited by 50 publications

References 67 publications

Green fabrication of flame retardant and superhydrophobic materials with application in oil‐water separation

Green fabrication of flame retardant and superhydrophobic materials with application in oil‐water separation

Fabrication of super-hydrophobic filter paper via mixed wax phase separation for efficient oil/water separation

Fabrication of robust self‐cleaning superhydrophobic coating by deposition of polymer layer on candle soot surface

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