Article
Chemistry, Physical
Dohyung Kim, Minki Lee, Jeong-Hyun Kim, Jinkee Lee
Summary: The study found that the dynamic contact angles on LIS are sensitive to changes in both the lubricant viscosity and the capillary number, and the cube of the dynamic contact angles is proportional to theta(3)(D), following a conventional hydrodynamic theory. The decreasing lubricant viscosity shifted the cube of the dynamic contact angles to high capillary numbers, and the dynamic contact angle data coincided with the prediction from a scaling law derived in this study.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Xiong Wang, Xiao Yan, Jiayu Du, Feipeng Chen, Fanfei Yu, Ran Tao, Steven Wang, Qi Min
Summary: This study experimentally investigated the wetting differences between Newtonian and viscoelastic fluids on microstructured surfaces. The results showed that the relationship between the dynamic contact angle and moving velocity differed for different microstructured surfaces for these fluids. The differences were influenced by variations in viscosity and elasticity, while the scale of microstructured surfaces had little effect.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Construction & Building Technology
Chongzhi Tu, Rong Luo, Tingting Huang
Summary: Two common test methods to measure the surface energy of asphalt binders, the Wilhelmy plate method and the sessile drop method, have significant differences due to the influence of infiltration velocity. Mathematical models were developed to determine actual dynamic contact angles, leading to a modified Wilhelmy plate calculation method to reduce measurement deviation to less than 10%.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Chemistry, Physical
Pablo F. Ibanez-Ibanez, Francisco J. Montes Ruiz-Cabello, Miguel A. Cabrerizo-Vilchez, Miguel A. Rodriguez-Valverde
Summary: The study demonstrates that the characterization of contact angle hysteresis on soft surfaces is sensitive to the measurement protocol and may have adventitious time-dependencies. The slow spontaneous relaxation of water drops on elastic surfaces may affect the observed values of contact angle hysteresis. The wetting properties of elastic surfaces should be properly examined with reliable values of contact angle measured after drop relaxation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Thermodynamics
Pouya Sharbati, Abdolali K. Sadaghiani, Ali Kosar
Summary: This study investigates the influence of contact angle (CA) and contact angle hysteresis (CAH) on humid air condensation and reveals their different roles in different stages of the condensation cycle. The findings show that increasing CAH has a negative effect on condensation heat transfer, while the impact of changing CA varies. Lower CAH values have a greater impact on enhancing condensation heat transfer, and increasing CAH has a more significant effect on hydrophobic surfaces than on hydrophilic surfaces. Additionally, decreasing CAH has a more pronounced effect on improving condensation heat transfer than increasing CA.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
B. B. Kazemian, P. Cheng
Summary: A variable solid-fluid interaction strength scheme compatible with the lattice Boltzmann method is introduced to investigate contact angle hysteresis phenomena numerically. The method is demonstrated to accurately reproduce the observed behaviors during droplet sliding and evaporation processes, and the results are in agreement with previous experimental investigations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Lan-Hee Yang, Kyeong Eun Park, Sungho Yoon
Summary: Efforts are being made to improve the hydrophilicity of polydimethylsiloxane (PDMS), by synthesizing bis(propane-1,2-diol)-terminated PDMS (G-PDMS-G) to enhance the hydrophilicity and reactivity of hydroxyl PDMS. This study shows that G-PDMS-G can decrease contact angle and viscosity, indicating improved hydrophilicity.
Article
Chemistry, Physical
Mohammad Bagher Asadi, Damon G. K. Aboud, Michael J. Wood, Gianluca Zeppetelli, Anne-Marie Kietzig
Summary: This article introduces a novel method for measuring the contact angle of a drop, which utilizes a smoothing splines approach to eliminate image noise, identify the contact point, and calculate the contact angle. The accuracy of this technique is demonstrated through synthetic drop images and real surface tests, showing higher accuracy than traditional methods.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Stephan B. Lunowa, Arjen Mascini, Carina Bringedal, Tom Bultreys, Veerle Cnudde, Iuliu Sorin Pop
Summary: This study investigated the mathematical models for capillary-driven flow of fluids in tubes and found that the dynamic contact angle and inertial effects have significant impacts on the model predictions. The newly developed models can accurately match experimental data and are sensitive to the properties of the fluid rather than the geometrical features.
Article
Engineering, Mechanical
Chuan Su, Weifang Chen, Dan Wang
Summary: In this paper, a comprehensive motorized spindle dynamic model was proposed to investigate its dynamic performance more seriously, considering multiple factors such as bearing, preload, fit clearance, and static eccentricity. The results show that the contact angle of the bearing, the clearance value, and the static eccentricity have significant impacts on the dynamic characteristics of the spindle.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2022)
Article
Engineering, Multidisciplinary
Zhiniu Xu
Summary: The drop area method can be used to characterize the hydrophobicity of materials, with varying effects under different drop conditions. The sensitivity of the method is influenced by the contact angle, drop volume, and liquid parameter. The drop area method is suitable for cases with small contact angles and relatively higher drop volume and liquid parameters.
Article
Engineering, Environmental
Muhammad Wahyu Nugraha, Mohd Dzul Hakim Wirzal, Fathilah Ali, Liszulfah Roza, Nonni Soraya Sambudi
Summary: By incorporating WO3/N-CQDs filler into the polymer matrix, the fibers showed altered wettability behavior, enhancing hydrophobicity while maintaining surface super-oleophilicity, leading to high separation performance and durability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Biochemistry & Molecular Biology
Nadiah Ramlan, Saiful Irwan Zubairi, Mohamad Yusof Maskat
Summary: This study investigates the potential application of chemical surface modification to reduce particle adhesion during the spray drying process. By optimizing the coating parameters, highly hydrophobic surfaces were achieved on borosilicate glass and stainless steel substrates that mimic the wall surface of the drying chamber. The results show that the hydrophobic coatings effectively reduce the adhesion of particles, and the surface analysis confirms the presence of desired chemical groups and surface structures.
Article
Thermodynamics
Joo Hyun Moon, Sangmin Lee, Chang Kyoung Choi, Seong Hyuk Lee
Summary: This study experimentally investigated the dynamic characteristics of a liquid droplet on microscale hole-patterned surfaces, comparing the effects of anodization on hydrophilicity. Results showed that the dynamic contact angle decreased with an increase in hole area fraction for the anodized surfaces, while the equilibrium and dynamic contact angles increased for non-anodized surfaces. Additionally, the dynamic contact diameter increased with area fraction and Weber number for anodized surfaces.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Review
Physics, Multidisciplinary
Dan Daniel, Maja Vuckovac, Matilda Backholm, Mika Latikka, Rahul Karyappa, Xue Qi Koh, Jaakko V. I. Timonen, Nikodem Tomczak, Robin H. A. Ras
Summary: Surface wetting, the interaction between a solid surface and a liquid droplet, plays a crucial role in nanoscience and industrial applications. This review explores how new surface characterization techniques have improved our understanding of surface wettability compared to traditional methods. The authors discuss various techniques, such as cantilever-based force probes and atomic force microscopy, that allow for a more detailed analysis of surface wetting properties. These advances in surface characterization techniques will contribute to the development of functional surfaces and materials for antifogging and antifouling applications.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Physical
Bin Zhan, Yan Liu, Shu-yi Li, Cigdem Kaya, Thomas Stegmaier, Maryam Aliabadi, Zhi-wu Han, Lu-quan Ren
APPLIED SURFACE SCIENCE
(2019)
Article
Chemistry, Physical
Bin Zhan, Yan Liu, Wen-Ting Zhou, Shu-Yi Li, Zhi-Biao Chen, Thomas Stegmaier, Maryam Aliabadi, Zhi-Wu Han, Lu-Quan Ren
Summary: The GCT foam prepared in this study shows high efficiency in separating oil-water mixtures, adsorbing water-soluble organic dyes, and separating oil-in-water emulsions, as well as degrading oil pollution with excellent anti-oil-fouling capability. This multifunctional foam has broad prospects in the treatment of oily wastewater and adsorption of water-soluble organic pollutants, providing a new strategy for oily wastewater remediation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Bin Zhan, Maryam Aliabadi, Guoyong Wang, Zhi-Biao Chen, Wen-Ting Zhou, Thomas Stegmaier, Wilfried Konrad, Goetz Gresser, Cigdem Kaya, Yan Liu, Zhiwu Han, Luquan Ren
Summary: Inspired by spider silk's ability to collect water from a humid environment, a superwetting poly(vinylidene fluoride) (PVDF) membrane with spindle-knotted structured fibers was prepared using the electrospinning method followed by oxygen plasma etching treatment. The membrane showed excellent separation efficiency for various oil-in-water emulsions, as the combination of special wettability property and spindle-knot structure facilitated quick accumulation of the emulsified oil droplets on the membrane surface. A model explaining this accumulation was developed and verified using an artificial fiber with micron-sized spindle-knot structure.
Article
Engineering, Chemical
Maryam Aliabadi, Wilfried Konrad, Thomas Stegmaier, Yan Liu, Bin Zhan, Guoyong Wang, Cigdem Kaya, Goetz Gresser
Summary: In this contribution, we present a model of oil-water separation based on the movement of liquid droplets on cone-shaped structures inspired by spider silk. The forces acting on the droplets are derived from first principles of physics, and their directional movement in another liquid medium is thoroughly investigated and modeled. The resulting model predicts the droplet motion dependence on time and system defining parameters, which provides a possibility for the design and preparation of bionic structures in droplet transport phenomena.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Biomedical
Elham Sharifikolouei, Ziba Najmi, Andrea Cochis, Alessandro Calogero Scalia, Maryam Aliabadi, Sergio Perero, Lia Rimondini
Summary: The study successfully created a cytocompatible and superhydrophobic Zr-Cu-Ag metallic glass coating, exhibiting good antibacterial properties and antifouling characteristics, with a high tolerance to cells.
MATERIALS TODAY BIO
(2021)
