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Journal articles on the topic 'Wettability of vegetal surfaces'

Author: Grafiati

Published: 29 March 2025

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1

Tita, SPS, R. Medeiros, JR Tarpani, E. Frollini, and V. Tita. "Chemical modification of sugarcane bagasse and sisal fibers using hydroxymethylated lignin: Influence on impact strength and water absorption of phenolic composites." Journal of Composite Materials 52, no. 20 (January 25, 2018): 2743–53. http://dx.doi.org/10.1177/0021998317753886.

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Chemical modification of fiber surfaces can increase wettability of composites reinforced by vegetal fibers and, consequently, the dispersion of the fiber in the matrix and mechanical properties can be improved. Although there are some studies about agents for chemical modifications of vegetal fiber surfaces, there are few data and discussion about the usage of lignin. In the present work, chemical modifications of sugarcane bagasse and sisal fibers using lignin (previously hydroxymethylated) were carried out under different reaction times (15, 30, and 60 min). The composition (holocellulose, hemicelluloses, cellulose, and lignin contents) of the treated and untreated fibers was evaluated. Phenolic composites were prepared using unmodified and modified fibers via compression molding process under temperature. Izod impact, water absorption tests, and scanning electron microscopy were performed to evaluate composite properties. The resin and lignin were characterized by size exclusion chromatography. Results showed that there was a tendency of reducing water absorption for composites prepared from modified fibers. Impact strengths of composites reinforced with sugarcane bagasse with modified fibers were similar to the ones with unmodified fibers (around 20 J/m). However, impact strengths for composites reinforced with modified sisal fibers (around 104 J/m for 15 min of reaction time) were higher than the ones with unmodified fibers (around 95 J/m). Therefore, the usage of lignin as a modifier agent of vegetal fiber surfaces to increase fiber–matrix adhesion for phenolic composites is a strategic alternative for improving products through simple, eco-friendly, and low-cost procedures.

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2

Osorio, Fernando, Gonzalo Valdés, Olivier Skurtys, Ricardo Andrade, Ricardo Villalobos-Carvajal, Andrea Silva-Weiss, Wladimir Silva-Vera, Begoña Giménez, Marcela Zamorano, and Johana Lopez. "Surface Free Energy Utilization to Evaluate Wettability of Hydrocolloid Suspension on Different Vegetable Epicarps." Coatings 8, no. 1 (December 30, 2017): 16. http://dx.doi.org/10.3390/coatings8010016.

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Surface free energy is an essential physicochemical property of a solid and it greatly influences the interactions between vegetable epicarps and coating suspensions. Wettability is the property of a solid surface to reduce the surface tension of a liquid in contact with it such that it spreads over the surface and wets it, resulting from intermolecular interactions when the two are brought together. The degree of wetting (wettability) is determined by an energy balance between adhesive and cohesive work. The spreading coefficient (Scf/food) is the difference between the work of adhesion and the work of cohesion. Surface wettability is measured by the contact angle, which is formed when a droplet of a liquid is placed on a surface. The objective of this work was to determine the effect of hydroxypropyl methylcellulose (HPMC), κ-carrageenan, glycerol, and cellulose nanofiber (CNF) concentrations on the wettability of edible coatings on banana and eggplant epicarps. Coating suspension wettability on both epicarps were evaluated by contact angle measurements. For the (Scf/food) values obtained, it can be concluded that the surfaces were partially wet by the suspensions. Scf/food on banana surface was influenced mainly by κ-carrageenan concentration, HPMC-glycerol, κ-carrageenan-CNF, and glycerol-CNF interactions. Thus, increasing κ-carrageenan concentrations within the working range led to a 17.7% decrease in Scf/banana values. Furthermore, a HPMC concentration of 3 g/100 g produced a 10.4% increase of the Scf/banana values. Finally, Scf/fruit values for banana epicarps were higher (~10%) than those obtained for eggplant epicarp, indicating that suspensions wetted more the banana than the eggplant surface.

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3

Bartman, Marcin, Sebastian Balicki, Lucyna Hołysz, and Kazimiera A. Wilk. "Surface Properties of Graffiti Coatings on Sensitive Surfaces Concerning Their Removal with Formulations Based on the Amino-Acid-Type Surfactants." Molecules 28, no. 4 (February 20, 2023): 1986. http://dx.doi.org/10.3390/molecules28041986.

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Water-in-oil (w/o) nanoemulsions stabilized with amino acid surfactants (AAS) are one example of nanotechnology detergents of the “brush on, wipe off”-type for removing graffiti coatings from different sensitive surfaces. The high-pressure homogenization (HPH) process was used to obtain the nanostructured fluids (NSFs), including the non-toxic and eco-friendly components such as AAS, esterified vegetable oils, and ethyl lactate. The most effective NSF detergent was determined by response surface methodology (RSM) optimization. Afterwards, several surface properties, i.e., topography, wettability, surface free energy, and the work of water adhesion to surfaces before and after their coverage with the black graffiti paint, as well as after the removal of the paint layers by the eco-remover, were determined. It was found that the removal of graffiti with the use of the NSF detergent is more dependent on the energetic properties and microporous structure of the paint coatings than on the properties of the substrates on which the layers were deposited. The use of NSFs and knowledge of the surface properties could enable the development of versatile detergents that would remove unwanted contamination from various surfaces easily and in a controlled way.

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4

Conradi, Marjetka, Bojan Podgornik, Maja Remškar, Damjan Klobčar, and Aleksandra Kocijan. "Tribological Evaluation of Vegetable Oil/MoS2 Nanotube-Based Lubrication of Laser-Textured Stainless Steel." Materials 16, no. 17 (August 26, 2023): 5844. http://dx.doi.org/10.3390/ma16175844.

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In the present work, the functionalisation of austenitic stainless steel, AISI 316L surfaces via nanosecond Nd:YAG laser texturing in order to modify the surface morphology with crosshatch and dimple patterns is presented. A tribological analysis under lubrication with sunflower and jojoba oil with and without the addition of a solid lubricant, MoS2 nanotubes, was performed. In conjunction with friction/wear response laser-textured surface wettability, oil spreadability and oil retention capacity were also analysed. It was shown that the crosshatch pattern generally exhibited lower friction than the dimple pattern, with the addition of MoS2 nanotubes not having any significant effect on the coefficient of friction under the investigated contact conditions. This was found in addition to the better oil spreadability and oil retention capacity results of the crosshatch-textured surface. Furthermore, texturing reduced the wear of the stainless-steel surfaces but led to an approximately one order of magnitude larger wear rate of the steel counter-body, primarily due to the presence of hard bulges around the textured patterns. Overall, the crosshatch pattern showed better oil retention capacity and lower friction in combination with different vegetable oils, thus making it a promising choice for improving tribological performance in various environmentally friendly applications.

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5

Wang, Bingjie, Ziqiong Geng, Bo Pan, Lei Jiang, and Yong Lin. "Effect of Vegetable Oil Adjuvant on Wetting, Drift, and Deposition of Pesticide Droplets from UAV Sprayers on Litchi Leaves." Agronomy 15, no. 2 (January 24, 2025): 293. https://doi.org/10.3390/agronomy15020293.

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The spatial transportation of pesticide spray droplets and their deposition and retention on plant leaf surfaces are critical factors contributing to pesticide loss. Adding adjuvants to pesticide solutions to improve their wettability and deposition behavior can enhance the targeted deposition efficiency of pesticides sprayed by unmanned aerial vehicle (UAV) sprayers. In this study, Maifei(MF), a prevalent vegetable oil adjuvant, was selected to analyze its effects on the physicochemical properties of water and 10% difenoconazole water-dispersible granules (D) and the wetting performance of droplets on litchi leaves. The changes in the drift and deposition of the spray solutions with or without MF were tested using a UAV sprayer, DJI T40. The results indicated that the addition of MF to water or D significantly decreased the surface tension (by 58.33% and 23.10%, respectively), wetting time (by 97.81% and 90.95%, respectively), and contact angle (by 40.95% to 70.75% for the adaxial and abaxial surfaces of litchi leaves), achieving the best effects at a 1% MF addition. Moreover, during the drift test, the addition of 1% MF to the solutions significantly reduced the cumulative drift rate (CDR) (by 48.10%). Finally, owing to the weakened spray drift risk and improved wettability of the droplets on litchi leaves with a 1% MF addition, the droplet deposition and penetration in the litchi canopy significantly improved, demonstrating an increased droplet density of 38.17% for the middle layers of the litchi and 15.75% for the lower layers, corresponding to increased coverage by 59.49% and 12.78%, respectively. Hence, MF can improve the interfacial properties of the spray solution on litchi leaves, reduce the drift risk, and promote deposition, thereby facilitating the efficient transfer and deposition of pesticide droplets from UAV sprayers.

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6

Ashokkumar, Saranya, Jens Adler-Nissen, and Per Møller. "Factors affecting the wettability of different surface materials with vegetable oil at high temperatures and its relation to cleanability." Applied Surface Science 263 (December 2012): 86–94. http://dx.doi.org/10.1016/j.apsusc.2012.09.002.

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7

Baldin, Vitor, Leonardo Rosa Ribeiro da Silva, Rogério Valentim Gelamo, Andres Bustillo Iglesias, Rosemar Batista da Silva, Navneet Khanna, and Alisson Rocha Machado. "Influence of Graphene Nanosheets on Thermo-Physical and Tribological Properties of Sustainable Cutting Fluids for MQL Application in Machining Processes." Lubricants 10, no. 8 (August 21, 2022): 193. http://dx.doi.org/10.3390/lubricants10080193.

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The growing need to increase productivity and pressures for more sustainable manufacturing processes lead to a shift to less harmful lubrication systems that are less harmful to nature and the people involved. The minimal quantity lubrication system (MQL) stands out in this respect, especially in interrupted cutting processes such as milling, due to the cutting interface’s highly dynamic and chaotic nature. Using graphene sheets in cutting fluids also increases the efficiency of machining processes. This work investigates the influence on thermophysical and tribological properties of concentrations of 0.05 wt% and 0.1 wt% of graphene sheets in two vegetable-based and one mineral-based cutting fluids. The fluids are first characterized (viscosity, thermal conductivity, diffusivity, and wettability) and tested in reciprocating and ramp milling tests; all experiments are based on norms. The results show that the experiments with cutting fluids (with and without graphene) showed better tribological behavior than those in dry conditions. The graphene sheets alter the thermo-physical and tribological properties of the cutting fluids. The MQL15 vegetable-based fluid showed better lubricating properties in the milling tests, with better conditions for tribosystem chip–tool–workpiece interfaces, which makes the friction coefficient, and wear rate stable. Vegetable-based cutting fluids, even in minimum quantities and with graphene nanoparticles, have a high potential for increasing the efficiency and sustainability of the milling process.

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8

Ma, Cha, Yu Ping Yang, and Long Li. "Study on Drilling Fluid Technology of Eliminating Bit Balling by Changing Wettability." Advanced Materials Research 542-543 (June 2012): 1083–86. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.1083.

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Using triethanolamine, vegetable fatty acid, alkyl polyoxyethylene alkyl ether sulfuric acid ester and dimethyl sulfate as raw materials, a new kind of anti-balling additive for drilling engineering (WORB) was synthesized. The wetting property and anti-balling performance of WORB were investigated according to the experiments of wettability, surface tension and absorption effect. The results indicate that the adsorption of WORB on the surface of the cuttings is monolayer adsorption, which can avoid repeated cutting caused by the agglomeration of cuttings. WORB can alter the wettability of rock surface and the inner pores of the rock to reduce the surface tension of the rocks. Moreover, WORB can form multilayer chemical and physical adsorption on the surface of drill bits and BHA in the form of oriented adsorption of organic phosphine.

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9

Orkoula, Malvina G., Petros G. Koutsoukos, Michel Robin, Olga Vizika, and Louis Cuiec. "Wettability of CaCO3 surfaces." Colloids and Surfaces A: Physicochemical and Engineering Aspects 157, no. 1-3 (October 1999): 333–40. http://dx.doi.org/10.1016/s0927-7757(99)00047-3.

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10

Vargha-Butler, E. I., E. Kiss, C. N. C. Lam, Z. Keresztes, E. Kálmán, L. Zhang, and A. W. Neumann. "Wettability of biodegradable surfaces." Colloid & Polymer Science 279, no. 12 (December 1, 2001): 1160–68. http://dx.doi.org/10.1007/s003960100549.

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11

Yong, Jiale, Feng Chen, Qing Yang, and Xun Hou. "Femtosecond laser controlled wettability of solid surfaces." Soft Matter 11, no. 46 (2015): 8897–906. http://dx.doi.org/10.1039/c5sm02153g.

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12

Yang, Jin-Long, Xuan Zhou, Yi-Feng Li, Xing-Pan Guo, Xiao Liang, and Jia-Le Li. "Plantigrade settlement of the musselMytilus coruscusin response to natural biofilms on different surfaces." Journal of the Marine Biological Association of the United Kingdom 94, no. 8 (July 30, 2014): 1639–49. http://dx.doi.org/10.1017/s0025315414001039.

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Surface properties affect the attachment of micro- and macroscopic marine organisms. The current study examined the settlement response of the musselMytilus coruscusplantigrades to natural biofilms formed on surfaces of different wettability. The percentages of plantigrade settlement were not influenced by the biofilms formed on variously wettable surfaces in the short term, but after 10 days, the plantigrade settlement rates decreased on biofilms formed on lower wettability surfaces. In general, lower wettability of the surfaces resulted in the decrease of the dry weight, bacterial and diatom density and the thickness of natural biofilms when compared to high wettability surfaces. In contrast, chlorophyll-aconcentration in biofilms was independent of the initial wettability of the surfaces. Comparative cluster analysis of bacterial denaturing gradient gel electrophoresis patterns revealed that high variability existed between the bacterial community on high wettability surfaces and that on low wettability surfaces. Thus, surface wettability affects the formation of natural biofilms, and this variation in biofilms developed on different wettability surfaces may explain the discrepancy in their corresponding inducing activities onM. coruscusplantigrade settlement. This finding provides new insight into interactions between mussel settlement, biofilm characteristics and surface properties.

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13

Keppert, M., V. Pommer, K. Šádková, A. Botnari, E. Vejmelková, and D. Koňáková. "Blended lime plasters with biomass ash and natural fibres reinforcement." Journal of Physics: Conference Series 2792, no. 1 (July 1, 2024): 012004. http://dx.doi.org/10.1088/1742-6596/2792/1/012004.

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Abstract The possibility to valorise biomass combustion ash in air lime based plaster was evaluated by means of mechanical properties. The possible effect of vegetable fibres (hemp, flax) was examined as well. The biomass ash improved significantly the mechanical properties of plaster. On the other hand, the vegetable fibres are limiting the compressive strength due to lower wettability between fibres and lime. However the fibres had positive effect on bending strength, as it is expected. The surface modification of fibres seems to be necessary in order to improve their performance in the lime system.

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14

Tsao, Heng-Kwong, and Gilbert C. Walker. "Virtual Issue: Wettability Gradient Surfaces." Langmuir 38, no. 2 (January 18, 2022): 603–4. http://dx.doi.org/10.1021/acs.langmuir.1c02940.

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15

Shin, Dong Hwan, Tolou Shokuhfar, Chang Kyoung Choi, Seong-Hyuk Lee, and Craig Friedrich. "Wettability changes of TiO2nanotube surfaces." Nanotechnology 22, no. 31 (July 5, 2011): 315704. http://dx.doi.org/10.1088/0957-4484/22/31/315704.

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16

Liu, Kesong, and Lei Jiang. "Metallic surfaces with special wettability." Nanoscale 3, no. 3 (2011): 825. http://dx.doi.org/10.1039/c0nr00642d.

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17

Maman, Michel, and Virginie Ponsinet. "Wettability of Magnetically Susceptible Surfaces." Langmuir 15, no. 1 (January 1999): 259–65. http://dx.doi.org/10.1021/la980379r.

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18

Sun, Taolei, Lin Feng, Xuefeng Gao, and Lei Jiang. "Bioinspired Surfaces with Special Wettability." Accounts of Chemical Research 38, no. 8 (August 2005): 644–52. http://dx.doi.org/10.1021/ar040224c.

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19

Sun, Taolei, Lin Feng, Xuefeng Gao, and Lei Jiang. "Bioinspired Surfaces with Special Wettability." Accounts of Chemical Research 39, no. 7 (July 2006): 487. http://dx.doi.org/10.1021/ar068150n.

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20

WANG, S., Y. SONG, and L. JIANG. "Photoresponsive surfaces with controllable wettability." Journal of Photochemistry and Photobiology C: Photochemistry Reviews 8, no. 1 (March 2007): 18–29. http://dx.doi.org/10.1016/j.jphotochemrev.2007.03.001.

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21

Osman, Maged A., and Beat A. Keller. "Wettability of native silver surfaces." Applied Surface Science 99, no. 3 (July 1996): 261–63. http://dx.doi.org/10.1016/0169-4332(96)00101-8.

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22

Webb, Hayden K., Russell J. Crawford, and Elena P. Ivanova. "Wettability of natural superhydrophobic surfaces." Advances in Colloid and Interface Science 210 (August 2014): 58–64. http://dx.doi.org/10.1016/j.cis.2014.01.020.

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23

S Raj, Soorya, Saya Ann Suresh, and Vinod T P. "Wettability Gradients on Soft Surfaces." Mapana Journal of Sciences 19, no. 2 (April 1, 2020): 73–93. http://dx.doi.org/10.12723/mjs.53.5.

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Properties, behaviors, and applications of soft materials depend decisively on the characteristics of their surfaces. Physical features and chemical functionality of the soft surfaces control their interactions with the surroundings thereby deciding their responses to various physical and chemical phenomena. A gradient of such surface features i.e, a gradual change in a chemical or physical characteristic across a surface will result in a gradual change in the response of the surface to its surroundings in the same direction. Chemical as well as physical (morphological) gradients on soft surface enable useful properties pertinent to a variety of fields such as microfluidics, surface coatings, sensing, optics, and biology. Numerous methods have been used for the preparation of chemical as well as morphological gradients. Practical applications of soft surface gradients require stable large-scale surfaces with precisely controlled directionality and resolution of the gradients. Wettability gradients are one of the prominent classes of gradients created on soft surfaces. These gradients are constituted by gradual increase or decrease of hydrophobicity/hydrophilicity across a surface. One-dimensional (1D) as well as two-dimensional (2D) wettability gradients are fabricated with different patterns. This short review will summarize the advancements in the preparation, properties, and applications of wettability gradients on soft surfaces. Qualitative description of the fabrication processes, properties, and practical applications of the gradients are included along with our comments about the future prospects of these systems.

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24

Karapanagiotis, Ioannis, and Panagiotis Manoudis. "Superhydrophobic surfaces." Journal of the Mechanical Behaviour of Materials 21, no. 1-2 (November 1, 2012): 21–32. http://dx.doi.org/10.1515/jmbm-2012-0022.

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AbstractSuperhydrophobicity – also known as water repellency – has recently attracted considerable attention because of its numerous potential applications. However, the fundamental concepts and equations describing the wettability of superhydrophobic surfaces have been known since the 1940s. These concepts are reviewed and discussed in the present feature article in light of the recent developments. Furthermore, the potential use of water-repellent siloxane-nanoparticle composites for surface protection and consolidation of stones and mortars used in outdoor objects of cultural heritage is investigated. Finally, it is shown that the wettability of the composite surfaces can be predicted by the Cassie-Baxter equation.

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25

Gulfam, Raza, and Yongping Chen. "Recent Growth of Wettability Gradient Surfaces: A Review." Research 2022 (July 18, 2022): 1–21. http://dx.doi.org/10.34133/2022/9873075.

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This review reports the recent progress and future prospects of wettability gradient surfaces (WGSs), particularly focusing on the governing principles, fabrication methods, classification, characterization, and applications. While transforming the inherent wettability into artificial wettability via bioinspiration, topographic micro/nanostructures are produced with changed surface energy, resulting in new droplet wetting regimes and droplet dynamic regimes. WGSs have been mainly classified in dry and wet surfaces, depending on the apparent surface states. Wettability gradient has long been documented as a surface phenomenon inducing the droplet mobility in the direction of decreasing wettability. However, it is herein critically emphasized that the wettability gradient does not always result in droplet mobility. Indeed, the sticky and slippery dynamic regimes exist in WGSs, prohibiting or allowing the droplet mobility, respectively. Lastly, the stringent bottlenecks encountered by WGSs are highlighted along with solution-oriented recommendations, and furthermore, phase change materials are strongly anticipated as a new class in WGSs. In all, WGSs intend to open up new technological insights for applications, encompassing water harvesting, droplet and bubble manipulation, controllable microfluidic systems, and condensation heat transfer, among others.

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26

Fan, Haifeng, and Zhiguang Guo. "Bioinspired surfaces with wettability: biomolecule adhesion behaviors." Biomaterials Science 8, no. 6 (2020): 1502–35. http://dx.doi.org/10.1039/c9bm01729a.

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This contribution reviewed the influences of surface extreme wettability on biomolecule adhesion behaviors, which is expected to bring a new perspective in the application of wettability to biomaterials.

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27

Kido, Daisuke, Keiji Komatsu, Toshikatsu Suzumura, Takanori Matsuura, James Cheng, Jeong Kim, Wonhee Park, and Takahiro Ogawa. "Influence of Surface Contaminants and Hydrocarbon Pellicle on the Results of Wettability Measurements of Titanium." International Journal of Molecular Sciences 24, no. 19 (September 28, 2023): 14688. http://dx.doi.org/10.3390/ijms241914688.

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Hydrophilicity/hydrophobicity—or wettability—is a key surface characterization metric for titanium used in dental and orthopedic implants. However, the effects of hydrophilicity/hydrophobicity on biological capability remain uncertain, and the relationships between surface wettability and other surface parameters, such as topography and chemistry, are poorly understood. The objective of this study was to identify determinants of surface wettability of titanium and establish the reliability and validity of the assessment. Wettability was evaluated as the contact angle of ddH2O. The age of titanium specimens significantly affected the contact angle, with acid-etched, microrough titanium surfaces becoming superhydrophilic immediately after surface processing, hydrophobic after 7 days, and hydrorepellent after 90 days. Similar age-related loss of hydrophilicity was also confirmed on sandblasted supra-micron rough surfaces so, regardless of surface topography, titanium surfaces eventually become hydrophobic or hydrorepellent with time. On age-standardized titanium, surface roughness increased the contact angle and hydrophobicity. UV treatment of titanium regenerated the superhydrophilicity regardless of age or surface roughness, with rougher surfaces becoming more superhydrophilic than machined surfaces after UV treatment. Conditioning titanium surfaces by autoclaving increased the hydrophobicity of already-hydrophobic surfaces, whereas conditioning with 70% alcohol and hydrating with water or saline attenuated pre-existing hydrophobicity. Conversely, when titanium surfaces were superhydrophilic like UV-treated ones, autoclaving and alcohol cleaning turned the surfaces hydrorepellent and hydrophobic, respectively. UV treatment recovered hydrophilicity without exception. In conclusion, surface roughness accentuates existing wettability and can either increase or decrease the contact angle. Titanium must be age-standardized when evaluating surface wettability. Surface conditioning techniques significantly but unpredictably affect existing wettability. These implied that titanium wettability is significantly influenced by the hydrocarbon pellicle and other contaminants inevitably accumulated. UV treatment may be an effective strategy to standardize wettability by making all titanium surfaces superhydrophilic, thereby allowing the characterization of individual surface topography and chemistry parameters in future studies.

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28

Wang, Xianchen, and Qin Zhang. "Insight into the Influence of Surface Roughness on the Wettability of Apatite and Dolomite." Minerals 10, no. 2 (January 28, 2020): 114. http://dx.doi.org/10.3390/min10020114.

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Surface roughness has an important influence on the wettability of particles. This paper is an innovative exploration to control the surface wettability of apatite and dolomite from the perspective of roughness in the background of phosphate flotation. Roughness characteristics of apatite and dolomite particles and its effects on wettability were investigated with surface roughness, contact angle measurements, and SEM analysis. The relationship between surface energy and wettability of different roughness surfaces was also discussed. The results indicated that the influence of roughness on apatite and dolomite particles showed the same regularity, and wettability increased with the increasing roughness for hydrophilic surfaces, while the wettability decreased for hydrophobic surfaces. The influence of roughness on wettability can be well explained by Wenzel and Cassie models, and the surface energy of different rough surfaces had a strong correlation with their wettability. When sodium oleate was added after acid treatment, the apatite was hydrophilic, while the dolomite was hydrophobic; the difference in wettability between them became greater as surface roughness increased. Thus, it can be predicted that the selective separation of dolomite and apatite under acid reverse flotation conditions can be strengthened by increasing the mineral surface roughness during comminution.

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29

Liu, Yue, Liyan Zhao, Jianjian Lin, and Shikuan Yang. "Electrodeposited surfaces with reversibly switching interfacial properties." Science Advances 5, no. 11 (November 2019): eaax0380. http://dx.doi.org/10.1126/sciadv.aax0380.

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Engineered surfaces with reversibly switching interfacial properties, such as wettability and liquid repellency, are highly desirable in diverse application fields but are rare. We have developed a general concept to prepare metallic porous surfaces with exceptionally powerful wettability switch capabilities and liquid-repellent properties through an extremely simple one-step electrochemical deposition process. The wettability switch and manipulative liquid-repellent properties are enabled by orientation change of the dodecyl sulfate ions ionically bonded to the porous membranes during electrodeposition. The porous membrane with adjustable wettability enables it to trap different lubricants on demand within the pores to form liquid-infused porous surfaces with varied liquid-repellent properties. We have demonstrated the application of the (liquid-infused) porous membrane in encryption, controllable droplet transfer, and water harvesting. Moreover, the silver porous membrane can be coated onto a copper mesh, forming a smart antifouling liquid gate capable of allowing water or oil to pass through on request.

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30

Patrakov, Yu F., S. A. Semenova, Yu A. Kharlampenkova, and S. A. Sozinov. "Determining the Wettability of Coal Surfaces." Coke and Chemistry 62, no. 12 (December 2019): 545–51. http://dx.doi.org/10.3103/s1068364x19120081.

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31

WATANABE, Tadakazu, and Isamu YAMAGUCHI. "Wettability Characteristics of Crop Leaf Surfaces." Journal of Pesticide Science 16, no. 4 (1991): 651–63. http://dx.doi.org/10.1584/jpestics.16.651.

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32

Liu, Mingjie, Shutao Wang, and Lei Jiang. "Bioinspired multiscale surfaces with special wettability." MRS Bulletin 38, no. 5 (May 2013): 375–82. http://dx.doi.org/10.1557/mrs.2013.100.

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33

Ghannam, Hajar, Adil Chahboun, and Mireille Turmine. "Wettability of zinc oxide nanorod surfaces." RSC Advances 9, no. 65 (2019): 38289–97. http://dx.doi.org/10.1039/c9ra05378f.

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34

Thomas, Richard R., Frank B. Kaufman, Juergen T. Kirleis, and Richard A. Belsky. "Wettability of Polished Silicon Oxide Surfaces." Journal of The Electrochemical Society 143, no. 2 (February 1, 1996): 643–48. http://dx.doi.org/10.1149/1.1836494.

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35

Jennissen, Herbert P. "Advanced wettability analysis of implant surfaces." Current Directions in Biomedical Engineering 2, no. 1 (September 1, 2016): 561–64. http://dx.doi.org/10.1515/cdbme-2016-0124.

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AbstractNew methodologies are a major driving force of scientific progress. In this case the finding that contact angles can be expressed as complex numbers offers the possibility of a much refined analysis beyond zero degrees of rough ultra-/superhydrophilic, (now called hyperhydrophilic), metal surfaces, which play a distinct role in dental and orthopedic implantology. The approaches, a short theoretical introduction and examples from medical applications are given.

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36

Marmur, A. "Measures of wettability of solid surfaces." European Physical Journal Special Topics 197, no. 1 (August 2011): 193–98. http://dx.doi.org/10.1140/epjst/e2011-01457-4.

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Peta, Katarzyna. "Multiscale Wettability of Microtextured Irregular Surfaces." Materials 17, no. 23 (November 22, 2024): 5716. http://dx.doi.org/10.3390/ma17235716.

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Surface microgeometry created by the energy of electric discharges is related to surface wetting behavior. These relationships change depending on the scale of observation. In this work, contact angles correlated with the surface complexity of AA 6060 after electro-discharge machining were analyzed at different observation scales. This research focuses on the methodology of selecting the best scales for observing wetting phenomena on irregular surfaces, as well as indicating the topographic characterization parameters of the surface in relation to the scales. Additionally, the geometric features of the surface that determine the contact angle were identified. In this study, the surfaces of an aluminum alloy are rendered using focus variation 3D microscopy and described by standardized ISO, area-scale, and length-scale parameters. The research also confirms that it is possible to design surface wettability, including its hydrophilicity and hydrophobicity, using electrical discharge machining parameters. The static and dynamic behavior of liquids on surfaces relevant to contact mechanics was also determined.

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Arora, Harpreet Singh, Quan Xu, Zhenhai Xia, Yee-Hsien Ho, Narendra B. Dahotre, Jan Schroers, and Sundeep Mukherjee. "Wettability of nanotextured metallic glass surfaces." Scripta Materialia 69, no. 10 (November 2013): 732–35. http://dx.doi.org/10.1016/j.scriptamat.2013.08.014.

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Kubiak, K. J., M. C. T. Wilson, T. G. Mathia, and Ph Carval. "Wettability versus roughness of engineering surfaces." Wear 271, no. 3-4 (June 2011): 523–28. http://dx.doi.org/10.1016/j.wear.2010.03.029.

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Wang, Bo, Xiaohan Xue, Xiaocheng Liu, Pavel Neuzžil, Binghe Ma, Weizheng Yuan, Jian Luo, and Chengyu Jiang. "Switchable wettability applicable to nonplanar surfaces." Applied Materials Today 13 (December 2018): 271–75. http://dx.doi.org/10.1016/j.apmt.2018.09.012.

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Salou, M., S. Yamazaki, N. Nishimiya, and K. Tsutsumi. "Wettability characteristics of treated aluminum surfaces." Colloids and Surfaces A: Physicochemical and Engineering Aspects 139, no. 3 (September 1998): 299–310. http://dx.doi.org/10.1016/s0927-7757(98)00343-4.

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Feng, Aiguo, Benjamin J. McCoy, Zuhair A. Munir, and Domenick Cagliostro. "Wettability of transition metal oxide surfaces." Materials Science and Engineering: A 242, no. 1-2 (February 1998): 50–56. http://dx.doi.org/10.1016/s0921-5093(97)00527-3.

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Stevens, N., C. I. Priest, R. Sedev, and J. Ralston. "Wettability of Photoresponsive Titanium Dioxide Surfaces." Langmuir 19, no. 8 (April 2003): 3272–75. http://dx.doi.org/10.1021/la020660c.

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Silva, V. L., C. M. Fernandes, and A. M. R. Senos. "Copper wettability on tungsten carbide surfaces." Ceramics International 42, no. 1 (January 2016): 1191–96. http://dx.doi.org/10.1016/j.ceramint.2015.09.050.

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Verplanck, Nicolas, Yannick Coffinier, Vincent Thomy, and Rabah Boukherroub. "Wettability Switching Techniques on Superhydrophobic Surfaces." Nanoscale Research Letters 2, no. 12 (November 13, 2007): 577–96. http://dx.doi.org/10.1007/s11671-007-9102-4.

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Zhang, Chunhui, Xiao Xiao, Ziwei Guo, Lei Jiang, and Cunming Yu. "Bubble transfer on wettability-heterogeneous surfaces." Chinese Chemical Letters 34, no. 7 (July 2023): 107941. http://dx.doi.org/10.1016/j.cclet.2022.107941.

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Li, Shuyi, Yuyan Fan, Yan Liu, Shichao Niu, Zhiwu Han, and Luquan Ren. "Smart Bionic Surfaces with Switchable Wettability and Applications." Journal of Bionic Engineering 18, no. 3 (May 2021): 473–500. http://dx.doi.org/10.1007/s42235-021-0038-7.

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AbstractIn order to satisfy the needs of different applications and more complex intelligent devices, smart control of surface wettability will be necessary and desirable, which gradually become a hot spot and focus in the field of interface wetting. Herein, we review interfacial wetting states related to switchable wettability on superwettable materials, including several classical wetting models and liquid adhesive behaviors based on the surface of natural creatures with special wettability. This review mainly focuses on the recent developments of the smart surfaces with switchable wettability and the corresponding regulatory mechanisms under external stimuli, which is mainly governed by the transformation of surface chemical composition and geometrical structures. Among that, various external stimuli such as physical stimulation (temperature, light, electric, magnetic, mechanical stress), chemical stimulation (pH, ion, solvent) and dual or multi-triggered stimulation have been sought out to realize the regulation of surface wettability. Moreover, we also summarize the applications of smart surfaces in different fields, such as oil/water separation, programmable transportation, anti-biofouling, detection and delivery, smart soft robotic etc. Furthermore, current limitations and future perspective in the development of smart wetting surfaces are also given. This review aims to offer deep insights into the recent developments and responsive mechanisms in smart biomimetic surfaces with switchable wettability under external various stimuli, so as to provide a guidance for the design of smart surfaces and expand the scope of both fundamental research and practical applications.

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Chen, Jianli, Yaohua Fan, Libo Wan, and Weifeng Wu. "Nanosecond laser-assisted fabrication of Ti6Al4V surfaces with gradient wettability and robust cross-linked microstructures." Journal of Physics: Conference Series 2790, no. 1 (July 1, 2024): 012013. http://dx.doi.org/10.1088/1742-6596/2790/1/012013.

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Abstract Surfaces with gradient wettability outperform singular superhydrophobic surfaces in terms of self-cleaning efficiency, anti-contamination properties, and fluid manipulation. These attributes offer extensive application potential across various industrial and scientific domains. This study introduces and employs nanosecond pulsed laser ablation to create wettability gradient surfaces on Ti6Al4V alloys, featuring robust cross-linked frame microstructures. Experimental results demonstrate that by varying the ridge width (w), associated with the liquid-solid contact fraction, we can achieve varying wettability and mechanical durability in these cross-linked frame microstructures. Wettability tests indicate static contact angles ranging from 150.7° to 105.45°. Furthermore, the sandpaper linear abrasion test illustrates a decrease in material wear rate with an increase in w. Under similar test conditions, the proposed surfaces demonstrate superior mechanical durability compared to two other prevalent wettability surface structures. The proposed surfaces, efficiently and eco-friendly produced through nanosecond laser fabrication, hold tremendous potential for diverse applications.

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Chen, Dayong, Gareth H. McKinley, and Robert E. Cohen. "Spontaneous wettability patterning via creasing instability." Proceedings of the National Academy of Sciences 113, no. 29 (July 5, 2016): 8087–92. http://dx.doi.org/10.1073/pnas.1522700113.

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Surfaces with patterned wettability contrast are important in industrial applications such as heat transfer, water collection, and particle separation. Traditional methods of fabricating such surfaces rely on microfabrication technologies, which are only applicable to certain substrates and are difficult to scale up and implement on curved surfaces. By taking advantage of a mechanical instability on a polyurethane elastomer film, we show that wettability patterns on both flat and curved surfaces can be generated spontaneously via a simple dip coating process. Variations in dipping time, sample prestress, and chemical treatment enable independent control of domain size (from about 100 to 500 μm), morphology, and wettability contrast, respectively. We characterize the wettability contrast using local surface energy measurements via the sessile droplet technique and tensiometry.

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Li, Xiaojia, Qingyun Long, Jingtao Xue, Zhiguang Liang, Binghuo Yan, and Laishun Wang. "Enhanced Pool Boiling Heat Transfer on Hybrid Wettability Downward-Facing Surfaces: Impact of Interfacial Phenomena and Rewetting Characteristics." Energies 17, no. 23 (November 22, 2024): 5849. http://dx.doi.org/10.3390/en17235849.

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The nucleation and growth of bubbles on homogeneous wetting surfaces have been extensively studied, but the intricate dynamics on hybrid wetting surfaces remain under-explored. This research aims to elucidate the impact of hybrid wettability on pool boiling heat transfer efficiency, specifically under downward-facing heating conditions. To this end, a series of hybrid wettability surfaces with varying hydrophilic and hydrophobic configurations are meticulously fabricated and analyzed. The study reveals distinctive interfacial phenomena occurring at the boundary between hydrophilic and hydrophobic regions during the boiling process. Experimental results indicate that surfaces with a higher proportion of hydrophilic to hydrophobic interfaces exhibit reduced superheat requirements and enhanced boiling heat transfer coefficients for equivalent heat flux densities. Furthermore, the rewetting characteristics of hybrid wettability surfaces are identified as pivotal factors in determining their critical heat flux (CHF). This investigation underscores the potential of hybrid wettability surfaces to optimize pool boiling heat transfer, offering valuable insights for the design and en-hancement of heat exchangers and other thermal management systems.

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