Explosive Pancake Bouncing on Hot Superhydrophilic Surfaces

2021 ◽  
Author(s):  
Minjie Liu ◽  
Hanheng Du ◽  
Yaqi Cheng ◽  
Huanxi Zheng ◽  
Yuankai Jin ◽  
...  
Keyword(s):  
Superhydrophilic Surfaces

scholarly journals Creation of Superhydrophobic and Superhydrophilic Surfaces on ABS Employing a Nanosecond Laser

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2547 ◽  
Author(s):  
Cristian Lavieja ◽  
Luis Oriol ◽  
José-Ignacio Peña
Keyword(s):  
Acrylonitrile Butadiene Styrene ◽  
Laser Pulses ◽  
Green Laser ◽  
Contact Angles ◽  
Material Surface ◽  
Nanosecond Laser ◽  
Focal Position ◽  
Superhydrophilic Surface ◽  
Wetting Behaviors ◽  
Superhydrophilic Surfaces

A nanosecond green laser was employed to obtain both superhydrophobic and superhydrophilic surfaces on a white commercial acrylonitrile-butadiene-styrene copolymer (ABS). These wetting behaviors were directly related to a laser-induced superficial modification. A predefined pattern was not produced by the laser, rather, the entire surface was covered with laser pulses at 1200 DPI by placing the sample at different positions along the focal axis. The changes were related to the laser fluence used in each case. The highest fluence, on the focal position, induced a drastic heating of the material surface, and this enabled the melted material to flow, thus leading to an almost flat superhydrophilic surface. By contrast, the use of a lower fluence by placing the sample 0.8 µm out of the focal position led to a poor material flow and a fast cooling that froze in a rugged superhydrophobic surface. Contact angles higher than 150° and roll angles of less than 10° were obtained. These wetting behaviors were stable over time.

Modeling of Transport During Droplet Deposition and Spreading on Smooth and Microstructured Superhydrophilic Surfaces

2016 ◽  
Author(s):  
Jordan P. Mizerak ◽  
Van P. Carey
Keyword(s):  
Contact Angle ◽  
Contact Angles ◽  
Ansys Fluent ◽  
Effective Contact ◽  
Microstructured Surfaces ◽  
Static Contact ◽  
Droplet Behavior ◽  
Contact Line Pinning ◽  
The Impact ◽  
Superhydrophilic Surfaces

The dynamic behavior of impinging water droplets is studied in the context of varying surface morphologies on smooth and microstructured superhydrophilic surfaces. The goal of this study is to evaluate the capability of contact angle wall adhesion models to accurately produce spreading phenomena seen on a variety of surface types. We analyze macroscale droplet behavior, specifically spreading extent and impinging regime, in situations of varying microscale wetting character and surface morphology. Axisymmetric, volume of fluid (VOF) simulations with static contact angle wall adhesion are conducted in ANSYS Fluent. Simulations are performed on water for low Weber numbers (We<20) on surfaces with features of length scale 5–10μm. Advanced microstructured surfaces consisting of unique wetting characteristics and lengths on each face are also tested. Results show that while the contact angle wall adhesion model shows fair agreement for conventional surfaces, the model underestimates spreading by over 60% for surfaces exhibiting estimated contact angles below approximately 0.5°. Microstructured surfaces adapt the wetting behavior of smooth surfaces with higher effective contact angles based on contact line pinning on morphology features. The propensity of the model to produce Wenzel and Cassie-Baxter states is linked to the spreading radius, introducing an interdependency of microscale wetting and macroscale spreading behavior. Conclusions describing the impact of results on evaporative cooling are also discussed.

scholarly journals An evaluation of superhydrophilic surfaces of dental implants - a systematic review and meta-analysis

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Arkadiusz Makowiecki ◽  
Jakub Hadzik ◽  
Artur Błaszczyszyn ◽  
Tomasz Gedrange ◽  
Marzena Dominiak
Keyword(s):  
Systematic Review ◽  
Dental Implants ◽  
Meta Analysis ◽  
Superhydrophilic Surfaces

Superhydrophilic Surfaces via Polymer−SiO2Nanocomposites

Langmuir ◽  
2010 ◽  
Vol 26 (19) ◽  
pp. 15567-15573 ◽  
Author(s):  
Hongchen Dong ◽  
Penglin Ye ◽  
Mingjiang Zhong ◽  
Joanna Pietrasik ◽  
Ray Drumright ◽  
...  
Keyword(s):  
Superhydrophilic Surfaces

Superhydrophobic or superhydrophilic surfaces regulated by micro-nano structured ZnO powders

2008 ◽  
Vol 255 (5) ◽  
pp. 3371-3374 ◽  
Author(s):  
Xingfu Zhou ◽  
Xuefeng Guo ◽  
Weiping Ding ◽  
Yi Chen
Keyword(s):  
Zno Powders ◽  
Superhydrophilic Surfaces

Underoil superhydrophilic surfaces: water adsorption in metal–organic frameworks

2018 ◽  
Vol 6 (4) ◽  
pp. 1692-1699 ◽  
Author(s):  
Mingming Liu ◽  
Lu Tie ◽  
Jing Li ◽  
Yuanyuan Hou ◽  
Zhiguang Guo
Keyword(s):  
Crude Oil ◽  
Water Adsorption ◽  
Metal Organic Frameworks ◽  
Building Blocks ◽  
Water Filtration ◽  
On Demand ◽  
Emulsion Separation ◽  
Metal Organic ◽  
Self Cleaning ◽  
Superhydrophilic Surfaces

Inspired by sarcocarps, metal–organic frameworks (MOFs) that can capture moisture spontaneously are presented as building blocks for the construction of underoil superhydrophilic surfaces. The MOF coating showed excellent self-cleaning properties to crude oil under water, and achieved on-demand emulsion separation through selective water filtration and adsorption.

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