scholarly journals Large-scale fabrication of translucent and repairable superhydrophobic spray coatings with remarkable mechanical, chemical durability and UV resistance

2017 ◽  
Vol 5 (21) ◽  
pp. 10622-10631 ◽  
Author(s):  
Danfeng Zhi ◽  
Yao Lu ◽  
Sanjayan Sathasivam ◽  
Ivan P. Parkin ◽  
Xia Zhang
Keyword(s):  
Large Scale ◽  
Spray Coating ◽  
Environmentally Friendly ◽  
Chemical Durability ◽  
Uv Resistance ◽  
Superhydrophobic Coating ◽  
Oil Separation ◽  
Spray Coatings

A simple and effective silica-polymer-based spray coating was developed to create a translucent, mechanically durable, chemically stable, healable and environmentally friendly superhydrophobic coating with UV resistance. The coating can be fabricated on soft substrates for water/oil separation.

scholarly journals Fabrication Techniques for Graphene Oxide-Based Molecular Separation Membranes: Towards Industrial Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 757
Author(s):  
Ohchan Kwon ◽  
Yunkyu Choi ◽  
Eunji Choi ◽  
Minsu Kim ◽  
Yun Chul Woo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Large Scale ◽  
Spray Coating ◽  
Dip Coating ◽  
Small Scale ◽  
Scale Production ◽  
Separation Membranes ◽  
Current Review ◽  
Slot Die ◽  
Continuous Fabrication

Graphene oxide (GO) has been a prized material for fabricating separation membranes due to its immense potential and unique chemistry. Despite the academic focus on GO, the adoption of GO membranes in industry remains elusive. One of the challenges at hand for commercializing GO membranes lies with large-scale production techniques. Fortunately, emerging studies have acknowledged this issue, where many have aimed to deliver insights into scalable approaches showing potential to be employed in the commercial domain. The current review highlights eight physical methods for GO membrane fabrication. Based on batch-unit or continuous fabrication, we have further classified the techniques into five small-scale (vacuum filtration, pressure-assisted filtration, spin coating, dip coating, drop-casting) and three large-scale (spray coating, bar/doctor blade coating, slot die coating) approaches. The continuous nature of the large-scale approach implies that the GO membranes prepared by this method are less restricted by the equipment’s dimensions but rather the availability of the material, whereas membranes yielded by small-scale methods are predominately limited by the size of the fabrication device. The current review aims to serve as an initial reference to provide a technical overview of preparing GO membranes. We further aim to shift the focus of the audience towards scalable processes and their prospect, which will facilitate the commercialization of GO membranes.

Investigation into the Effects of High Temperature on Mechanical Properties of Thermal Spray Coatings Applied by Plasma Spraying

2018 ◽  
Vol 284 ◽  
pp. 1151-1156
Author(s):  
Lenar N. Shafigullin ◽  
A.R. Ibragimov ◽  
A.I. Saifutdinov
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
High Temperature ◽  
Thermal Spray ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
Thermal Spray Coatings ◽  
Spray Coatings ◽  
Heat Treatment Of Coatings ◽  
Double Heat Treatment

C. C. Berndt advanced investigations of mechanical properties of thermal spray coatings under 4-point bending. He found that this investigation method is sensitive to the mechanical properties of thermal spray coatings.This paper contains the detailed investigation results for thermal spray coatings of zirconium dioxide under 4-point bending, i.e. tests of the specimens subjected to spraying at varying conditions and pre-test soaking with the various duration at 1100 °С.It was established how the mechanical properties of thermal spray coatings changed depending on the spraying mode and high temperature soaking. The test results show that the double heat treatment of coatings is more preferable than one-time heat treatment as it make the properties change linearly. It is more easily controllable during operation of the components with thermal spray coating.

A Contribution to Methodology and Protocol Definition for Thermal Spray Coated Surface Compatibility Analysis in Food Processing Applications

1998 ◽  
Author(s):  
A. Scrivani ◽  
N. Antolotti ◽  
S. Bertini ◽  
G. Viola ◽  
R. Groppetti ◽  
...  
Keyword(s):  
Thermal Spray ◽  
Food Additives ◽  
Spray Coating ◽  
Thermal Spray Coating ◽  
International Standards ◽  
Test Case ◽  
Testing Methodology ◽  
Spray Coatings ◽  
Temperature Conditions ◽  
Compatibility Analysis

Abstract The paper discusses the testing methodology and identifies the analytical protocols, with proper validation, in order to evaluate the compatibility of thermal spray coatings in the food production technology, according to EU and FDA applicable standards. A brief state-of-the-art analysis of the international standards on food additives and human health is given, namely on indirect food additives (as defined in 21 CFR 170.3(e)), that can migrate into the food during the process. An outline of the test protocols, based on contact between coating and food simulating solvents in a set time/temperature conditions, are presented, and the main phases for the proposed testing methodology, as the choice of the simulating solvent, the migration cell design and the time/temperature conditions, are discussed. Finally the proposed methodology and protocols are validated through a thermal spray coating for food process application test case.

Large-scale Aqueous Synthesis of Cu(In,Ga)Se2 Nanoparticles for Photocatalytic Degradation of Ciprofloxacin

2021 ◽  
Author(s):  
Bruna Gonçalves ◽  
Pedro Martins ◽  
Alec P LaGrow ◽  
Gabriela L Botelho ◽  
Laura M. Salonen ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Large Scale ◽  
Environmentally Friendly ◽  
Contaminants Of Emerging Concern ◽  
Aqueous Synthesis ◽  
Cigs Nanoparticles

Environmentally friendly synthesis of Cu(In,Ga)Se2 (CIGS) nanoparticles (NPs) is pivotal for producing sustainable photocatalytic compounds to be applied in the remediation of contaminants of emerging concern from water. To this...

Surface Analysis of Shear Strength Tested Tungsten Carbide Thermal Spray Coatings+

1997 ◽  
Vol 3 (S2) ◽  
pp. 791-792 ◽  
Author(s):  
S. V. Naidu ◽  
Carlos Green ◽  
Christopher Maxie ◽  
James D. Garber ◽  
Gary A. Glass
Keyword(s):  
Thermal Spray ◽  
Adhesive Strength ◽  
Shear Test ◽  
Spray Coating ◽  
Test Method ◽  
Thermal Spray Coatings ◽  
Oxide Content ◽  
Ring Shear Test ◽  
Spray Coatings ◽  
Ring Shear

Thermal spray processing has become an important powder-consolidation technique to yield new materials for extremes of temperature, radiation, wear, corrosion and mechanical stresses. High Velocity Oxy-Fuel (HVOF) spray coating process gives higher deposition densities and coating hardness; lower oxide content and porosity. The adhesive strength of thermal spray coatings is greatly effected by the interfacial impurities. The ring shear test method shown in Fig. 1 appears to give the most accurate results on shear adhesive strength. A typical ring shear test result of 88WC12Co 1/4" ring HVOF thermal spray coating on 4140 steel rod using a Jet kote thermal spray gun is shown in Fig. 2. Repeated ring shear tests on similar samples prepared under same spray and test conditions resulted in different shear bond strength and coating ring displacement before break off. We examined the ring shear tested coatings using a Zeiss DMS942 Scanning Electron Microscope (SEM) and Kevex Energy Dispersive X-ray Spectrometer (EDXS) with LPX1 Quantum Si(Li) Detector.

Environmentally friendly, scalable exfoliation for few-layered hexagonal boron nitride nanosheets (BNNSs) by multi-time thermal expansion based on released gases

2019 ◽  
Vol 7 (46) ◽  
pp. 14701-14708 ◽  
Author(s):  
Zhi-lin Cheng ◽  
Zhan-sheng Ma ◽  
Hong-liang Ding ◽  
Zan Liu
Keyword(s):  
Thermal Expansion ◽  
Boron Nitride ◽  
Large Scale ◽  
Hexagonal Boron Nitride ◽  
Environmentally Friendly ◽  
Boron Nitride Nanosheets ◽  
Novel Approach

A novel approach to exfoliate BNNSs on a large scale via multi-time thermal expansion is described.

Splat formation in plasma-spray coating process

2002 ◽  
Vol 74 (3) ◽  
pp. 441-445 ◽  
Author(s):  
Javad Mostaghimi ◽  
Sanjeev Chandra
Keyword(s):  
Plasma Spray ◽  
Flat Surface ◽  
Spray Coating ◽  
Particle Impact ◽  
Coating Process ◽  
Splat Formation ◽  
3 Dimensional ◽  
Spray Coatings ◽  
Plasma Spray Coatings ◽  
Recent Developments

The paper describes recent developments in modeling formation of plasma-spray coatings. This is a stochastic process in which particle-impact conditions, thermophysical properties, substrate topology, and temperature all play important roles in determining the structure of coating. Specific attention is paid to the simulation of droplet impact and solidification under plasma-spraying conditions. Results of 3-dimensional models show that on a flat surface solidification may cause splashing and break-up of the impacting particle. Undercooling effects result in faster solidification and, thus, smaller extent of spreading. More recent works investigate the effect of surrounding gas on dynamics of impact. It is shown that this could result in entrapment of a bubble under the droplet.

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