Wetting of Hydrophobic and Hydrophilic Coatings

2021 ◽  
Author(s):  
Yu. A. Kuzma-Kichta ◽  
N. S. Ivanov ◽  
D. V. Chugunkov ◽  
A. V. Lavrikov
Keyword(s):  
Hydrophilic Coatings

scholarly journals Buoyancy control in ammonoid cephalopods refined by complex internal shell architecture

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
David J. Peterman ◽  
Kathleen A. Ritterbush ◽  
Charles N. Ciampaglio ◽  
Erynn H. Johnson ◽  
Shinya Inoue ◽  
...  
Keyword(s):  
Surface Tension ◽  
Water Retention Capacity ◽  
Functional Explanation ◽  
Retention Capacity ◽  
Biomechanical Stress ◽  
Liquid Retention ◽  
3D Printed ◽  
Functional Explanations ◽  
Hydrophilic Coatings ◽  
The Impact

AbstractThe internal architecture of chambered ammonoid conchs profoundly increased in complexity through geologic time, but the adaptive value of these structures is disputed. Specifically, these cephalopods developed fractal-like folds along the edges of their internal divider walls (septa). Traditionally, functional explanations for septal complexity have largely focused on biomechanical stress resistance. However, the impact of these structures on buoyancy manipulation deserves fresh scrutiny. We propose increased septal complexity conveyed comparable shifts in fluid retention capacity within each chamber. We test this interpretation by measuring the liquid retained by septa, and within entire chambers, in several 3D-printed cephalopod shell archetypes, treated with (and without) biomimetic hydrophilic coatings. Results show that surface tension regulates water retention capacity in the chambers, which positively scales with septal complexity and membrane capillarity, and negatively scales with size. A greater capacity for liquid retention in ammonoids may have improved buoyancy regulation, or compensated for mass changes during life. Increased liquid retention in our experiments demonstrate an increase in areas of greater surface tension potential, supporting improved chamber refilling. These findings support interpretations that ammonoids with complex sutures may have had more active buoyancy regulation compared to other groups of ectocochleate cephalopods. Overall, the relationship between septal complexity and liquid retention capacity through surface tension presents a robust yet simple functional explanation for the mechanisms driving this global biotic pattern.

scholarly journals Biomedical Uses of Sulfobetaine-Based Zwitterionic Materials

2020 ◽  
Vol 02 (04) ◽  
pp. 342-357
Author(s):  
Francesco Zaccarian ◽  
Matthew B. Baker ◽  
Matthew J. Webber
Keyword(s):  
Biomedical Applications ◽  
Foreign Body Reaction ◽  
Inflammatory Responses ◽  
Cellular Adhesion ◽  
Review Of The Literature ◽  
Future Prospects ◽  
Protein Fouling ◽  
Biomedical Device ◽  
The Many ◽  
Hydrophilic Coatings

Protein fouling can render a biomedical device dysfunctional, and also serves to nucleate the foreign body reaction to an implanted material. Hydrophilic coatings have emerged as a commonly applied route to combat interface-mediated complications and promote device longevity and limited inflammatory response. While polyethylene glycol has received a majority of the attention in this regard, coatings based on zwitterionic moieties have been more recently explored. Sulfobetaines in particular constitute one such class of zwitterions explored for use in mitigating surface fouling, and have been shown to reduce protein adsorption, limit cellular adhesion, and promote increased functional lifetimes and limited inflammatory responses when applied to implanted materials and devices. Here, we present a focused review of the literature surrounding sulfobetaine, beginning with an understanding of its chemistry and the methods by which it is applied to the surface of a biomedical device in molecular and polymeric forms, and then advancing to the many early demonstrations of function in a variety of biomedical applications. Finally, we provide some insights into the benefits and challenges presented by its use, as well as some outlook on the future prospects for using this material to improve biomedical device practice by addressing interface-mediated complications.

scholarly journals Hydrophilic Coatings

2010 ◽  
Vol 46 (5) ◽  
pp. 168-172
Author(s):  
Katsuhiko IMOTO
Keyword(s):  
Hydrophilic Coatings

Roughness Structures of Ultrahydrophobic and Hydrophilic Coatings on Glass

2010 ◽  
Author(s):  
Luisa Coriand ◽  
Monika Mitterhuber ◽  
Angela Duparré
Keyword(s):  
Hydrophilic Coatings

Characterization of Polyolefin Separator Support Membranes with Hydrophilic Coatings

2017 ◽  
Vol 27 (1) ◽  
pp. 92-103
Author(s):  
Yun Hwan Park ◽  
◽  
Sang Yong Nam
Keyword(s):  
Hydrophilic Coatings

Synthesis and morphological study on the nanocomposite hydrophilic coatings

2009 ◽  
Vol 255 (11) ◽  
pp. 5746-5754 ◽  
Author(s):  
Amir Ershad-Langroudi ◽  
Salimeh Gharazi ◽  
Azam Rahimi ◽  
Diba Ghasemi
Keyword(s):  
Morphological Study ◽  
Hydrophilic Coatings

Research Progress of the Polyurethane-nTiO2 Self-Cleaning Coating

2014 ◽  
Vol 633-634 ◽  
pp. 261-265
Author(s):  
Lin Wang ◽  
Yi Shang ◽  
Xia Xiao ◽  
Bo Mu ◽  
Guang Wen Zhang
Keyword(s):  
Active Sites ◽  
Uv Light ◽  
Polymer Nanocomposite ◽  
Research Progress ◽  
Photo Catalysis ◽  
Environmental Friendly ◽  
Stable Chemical ◽  
Industrial Health ◽  
Self Cleaning ◽  
Hydrophilic Coatings

Self-cleaning coatings are getting tremendous attention from both the academic interest and industrial communities. Among the two kinks of self-cleaning coatings, which are super-hydrophobic and super-hydrophilic coatings, the super-hydrophilic self-cleaning coating comprised of TiO2/doped-TiO2has four unique features when exposed to ultraviolet (UV) light or sunlight, which are self-cleaning property, anti-bacterial properties, environmental friendly, and visible-light photocatalysts and indoor usage. And PU-TiO2self-cleaning coating produced by “grafting” method, which can accomplish stable chemical attachment between the nTiO2and the PU substrates, may potentially show an increase of the thermal properties, an increase of the amount of active sites for photo-catalysis, and a decrease in the self-degradation of the resulting polymer nanocomposite than the traditional mechanical shear method. There is a tremendous scope for the application of polyurethane-nTiO2self-cleaning coatings in industrial, health care and consumer sectors.

Ultraporous nanocrystalline TiO2-based films: synthesis, patterning and application as anti-reflective, self-cleaning, superhydrophilic coatings

Nanoscale ◽  
2015 ◽  
Vol 7 (46) ◽  
pp. 19419-19425 ◽  
Author(s):  
Marco Faustini ◽  
Antonin Grenier ◽  
Guillaume Naudin ◽  
Ronghua Li ◽  
David Grosso
Keyword(s):  
Nanocrystalline Tio2 ◽  
Self Cleaning ◽  
Hydrophilic Coatings

Ultraporous anatase-based TiO2 films are synthesized, patterned and used as multifunctional anti-reflective, self-cleaning, super-hydrophilic coatings.

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