Surface properties of cork: Is cork a hydrophobic material?

Chanut, Julie; Wang, Yiqian; Cin, Irene Dal; Ferret, Eric; Gougeon, Régis D.; Bellat, Jean‐Pierre; Karbowiak, Thomas

doi:10.1016/j.jcis.2021.09.140

Cited by 18 publications

(18 citation statements)

References 34 publications

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“…The contact angle of a cork powder with a liquid cannot be determined by using the sessile drop method because of the surface heterogeneity of the cork . It was determined by using the capillary rise method, based on the capillary flow dynamics through a powdered solid.…”

Section: Methodsmentioning

confidence: 99%

“…A specific program has been developed on MATLAB (MathWorks, R2018a) to take into account the variability from experimental analysis and data treatment for the measurements performed by the capillary rise method. This procedure has already been detailed in a previous article . It includes experimental variability on the determination of the capillary constant c with n- hexane (eq , with cos θ = 1), experimental variability on the determination of the contact angle value θ with each liquid (eq , with known constant c ), and variability due to the fitting of the Owens and Wendt model to the experimental data (linear regression from eq , with previously determined θ values for each liquid).…”

Section: Methodsmentioning

confidence: 99%

“…The conventional measurement of the contact angle between different liquids and the cork surface has been performed in several studies. − However, such a method might not provide reliable results in terms of characterizing the surface tension because of the cork surface heterogeneity. Another approach by capillary rise measurement was found to be a suitable method for characterizing this material, leading to a reliable surface tension of 22.6 (±1.2) mN·m –1 . In parallel, only a few studies have also focused on the wetting properties of polyurethane binders on the cork surface, by comparing the surface properties of several binders of different chemical natures. ,, Furthermore, the wettability of coating agents on cork has never been studied in detail.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Unraveling the Complex Interfacial Properties of Cork-Based Materials in Their Use as Wine Stoppers

Chanut

Wang

Gougeon

et al. 2022

ACS Appl. Mater. Interfaces

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This study investigates the surface and interfacial properties of the different components of a system composed of an agglomerated cork stopper in a glass bottleneck. Each constituting element has carefully been examined to unveil its underlying complexity. First, there was no effect of supercritical CO2 pretreatment or particle size on the surface properties of cork particles. The wettability of the binder was also evaluated, showing that the binder can spread relatively well on the surface of cork particles. Second, capillary rise measurements carried out on three different agglomerated corks indicate that the formulation of the agglomerates has no effect on its surface properties. The binder represents only a small fraction of the total stopper volume and is therefore not the major contributor to the surface tension. Third, the two coating agents studied display different behaviors. The first one, composed of a paraffin emulsion, exhibits poorer wettability than the second one, composed of a paraffin and silicone emulsion. However, once the coating agent has solidified on the surface of the stopper, both coatings display similar adhesion with the glass of the bottleneck. Starting with fundamental considerations, and then progressing to a more applicative aspect, has led to a better understanding of the properties of cork-based materials in their use as wine stoppers.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Unraveling the Complex Interfacial Properties of Cork-Based Materials in Their Use as Wine Stoppers

Chanut

Wang

Gougeon

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

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“…Surface wettability is an important material property, and it is determined by surface structure and surface chemical composition [ 1 , 2 ]. Based on existing theoretical methods, a special material wettability can be achieved by modification of surface texture and surface chemical composition [ 3 , 4 ]. During the last decades, there has been increasing interest in the materials with unique functions due to their promising application in various fields such as self-cleaning, antimicrobial, anti-icing, biocompatible materials, or oil transportation [ 4 , 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Wettability Improvement in Oil–Water Separation by Nano-Pillar ZnO Texturing

et al. 2022

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The nanostructure-based surface texturing can be used to improve the materials wettability. Regarding oil–water separation, designing a surface with special wettability is as an important approach to improve the separation efficiency. Herein, a ZnO nanostructure was prepared by a two-step process for sol–gel process and crystal growth from the liquid phase to achieve both a superhydrophobicity in oil and a superoleophobic property in water. It is found that the filter material with nanostructures presented an excellent wettability. ZnO-coated stainless-steel metal fiber felt had a static underwater oil contact angle of 151.4° ± 0.8° and an underoil water contact angle of 152.7° ± 0.6°. Furthermore, to achieve water/oil separation, the emulsified impurities in both water-in-oil and oil-in-water emulsion were effectively intercepted. Our filter materials with a small pore (~5 μm diameter) could separate diverse water-in-oil and oil-in-water emulsions with a high efficiency (>98%). Finally, the efficacy of filtering quantity on separation performance was also investigated. Our preliminary results showed that the filtration flux decreased with the collection of emulsified impurities. However, the filtration flux could restore after cleaning and drying, suggesting the recyclable nature of our method. Our nanostructured filter material is a promising candidate for both water-in-oil and oil-in-water separation in industry.

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“…Nonetheless, it is used in vast and diverse areas such as construction, fashion industries, vehicles, and the aerospace industry. The objective of this project is to study cork [1] as a valuable and promising material for usage in structural batteries based on solid ferroelectric electrolytes [2,3].…”

mentioning

confidence: 99%