The Physical and Antibacterial Properties of Argentine-Doped TiO2 Film on Stainless Steel Substrate

2007 ◽  
Vol 280-283 ◽  
pp. 801-804 ◽  
Author(s):  
Xin Geng Ding ◽  
Li Li
Keyword(s):  
Stainless Steel ◽  
Tio2 Film ◽  
Steel Substrate ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Abrasive Resistance ◽  
Doped Tio2 ◽  
Tio2 Anatase ◽  
Antibacterial Performance ◽  
Surface Oxidization

The aim of the present study is to investigate the physical properties and antibacterial performances of Ag+-doped TiO2 film on stainless steel and effects of surface oxidization. In the experiment, the surface of stainless steel was been oxidized by heat treatment (550°C, 1 hour) before the Ag+-doped TiO2 (anatase) film being formed by sol-gel method. Sample A (filmed after surface oxidization), B (filmed without surface oxidization), C (only surface oxidization) and D (neither oxidized nor filmed) were respectively tested for corrosive resistance, abrasive resistance and adhesiveness, and the samples with different content of argentine was tested for antibacterial performance. Results: 1) Corrosion rates of sample A, B, C and D in 10% FeCl3 solution are respectively 1.65%, 1.87%, 2.02% and 3.28%, suggesting that the film has protected the stainless steel from the corrosion; 2) Scratching using a loaded (150 g) pin makes no crack on surface of sample A, while it results a slight scuffing on surface of sample B, suggesting that the surface oxidization has enhanced the abrasive resistance and adhesiveness of the TiO2 film, which may be due to the bridge-like function of the oxidation film; 3)Antibacterial performance is enhanced as the content of doping argentine increases, exceeding 90% when the argentine reached 3%, and the TiO2 film on the oxidized stainless steel performs better in antibacterial test than untreated one.

The Interface Reaction between an Ag+-Doped TiO2 Film and Stainless Steel Substrate

2007 ◽  
Vol 336-338 ◽  
pp. 1559-1562 ◽  
Author(s):  
Xin Geng Ding ◽  
Ji Wei Gao ◽  
Qian Hong Shen ◽  
Jian Xiang Liu ◽  
Li Li
Keyword(s):  
Stainless Steel ◽  
Tio2 Film ◽  
Photoelectron Spectroscopy ◽  
Antibacterial Property ◽  
Steel Substrate ◽  
Sol Gel ◽  
Interface Reaction ◽  
Crystal Form ◽  
Acicular Crystal ◽  
X Ray

Ag+-doped TiO2 films on stainless steel were prepared by a sol-gel method and their microstructures and compositions were studied with X-Ray Diffractometer, Scanning Electron Microscope (SEM) and X-ray Photoelectron Spectroscopy. It was shown that Fe atoms in untreated stainless steel react with Ag+ in the TiO2 film and form FeTiO3, which has an acicular crystal form under SEM observation. As a result, Ag+ in the film is reduced to the silver atom, which degrades the antibacterial property of the film. However, after an oxidization of the substrate, a layer of ferric oxide is formed, which reacts with Fe atoms that would otherwise react with and reduce Ag+, and then forms FeTiO3. Thus, the penetration of Fe atoms is stopped and Ag+ in the anatase-structure TiO2 film is protected from the reduction, which enhanced antibacterial property of the film.

Thermal Stability of Al2O3 Coated Low Transition Temperature Glass

2010 ◽  
Vol 297-301 ◽  
pp. 875-880 ◽  
Author(s):  
Kung Jeng Ma ◽  
His Hsin Chien ◽  
S. Prabhakar Vattikuti ◽  
Chien Huang Kuo ◽  
Cheng Bang Huo ◽  
...  
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Transition Temperature ◽  
Heating Temperature ◽  
Steel Substrate ◽  
Sol Gel ◽  
Contact Angles ◽  
Reaction Products ◽  
Molding Process ◽  
Coated Glass

There are growing varieties of glasses available on the market for the manufacture of molded optical lenses. A glass with a low transition temperature (Tg) has the advantage of extending the service life of molding dies. However, most of the low Tg glasses have a high content of alkali metal oxides and tend to induce severe glass sticking problems. This has made the molding process of these kinds of glasses very difficult indeed. The low Tg glasses normally demonstrate poor chemical durability and scratch resistance. As a result, the yields of fabricating the glass-preforms are frequently rather low. This research tried depositing a very thin layer of aluminum oxide on various glass-preforms by a water based sol-gel process. A high temperature glass wetting experiment was carried out to investigate the high temperature interfacial reaction between the coated glass gobs and stainless steel substrate. It was found that when the uncoated glass-preforms were brought into contact with stainless steel, the contact angle decreased with increasing heating temperature and duration. Owing to the severe interfacial chemical reaction, the originally transparent glass gradually turned translucent. In the case of Al2O3 coated glass-preforms, the variation of the contact angles was very limited, which presented no sticking and no wetting behavior. No reaction products could be detected on the contact area after the wetting test. The optical transmission of those lenses molded from the coated glass-preforms exhibited no or very little changes after the molding process.

Preparation, characterization, antibacterial properties and hydrophobic evaluation of SiO2/Ag nanosol coated cotton/linen fabric

2020 ◽  
Vol 111 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Hongbin Li ◽  
Yan Zhuang ◽  
Hao Li ◽  
Karen Chávez Bracamontes ◽  
Dawei Wang ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Air Permeability ◽  
Hydrophobic Property ◽  
Textile Materials ◽  
Antibacterial Performance ◽  
Ag Particles ◽  
Linen Fabric ◽  
Coated Cotton

Surface modification is an important element of textile manufacturing. The SiO2/Ag sol–gel was coated on the cotton/linen fabric by a simple two-dipping-two-rolling coating machine. SEM, Zeta-potential, (ATR)-FTIR and XRD, physical properties, water-droplet adsorption, antibacterial performance and water-resisting property have been adopted as the characterization techniques. The Zeta-potential showed that the nano-Ag particles affected the size of SiO2 nanoparticles. The results showed that antibacterial activity and hydrophobic property of cotton/linen fabric increased with the increasing concentration of the AgNO3. Air permeability was not decreased considerably, whereas tensile strength was increased significantly after coating twice. The SiO2/Ag coating cotton/linen fabric had an excellent antibacterial performance. Our results demonstrate that this SiO2/Ag coated cotton/linen fabric is a step towards better hydrophobic performance of textile materials.

Photocatalytic and antibacterial properties of ZnO films with different surface topographies on stainless steel substrate

2016 ◽  
Vol 616 ◽  
pp. 842-849 ◽  
Author(s):  
Saara Heinonen ◽  
Matti Kannisto ◽  
Juha-Pekka Nikkanen ◽  
Elina Huttunen-Saarivirta ◽  
Matti Karp ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Antibacterial Properties ◽  
Zno Films ◽  
Surface Topographies

Macro-Residual Stress in 304 Stainless Steel Coated with ZrO2-CeO2 Thin Films by Sol-Gel Process

2007 ◽  
Vol 336-338 ◽  
pp. 2649-2651 ◽  
Author(s):  
Xin Gang Yu ◽  
Lan Yun Liu ◽  
Yan Bin Zuo ◽  
Lin Jiang Wang ◽  
Hong Wen Ma ◽  
...  
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Surface Layer ◽  
Steel Substrate ◽  
Substrate Surface ◽  
Sol Gel ◽  
Dip Coating ◽  
Metal Substrate ◽  
304 Stainless Steel ◽  
Sol Gel Process

X-ray diffraction (XRD) method to measure the residual stress existing in the metal substrate surface layer was introduced and the sol-gel ZrO2-CeO2 thin film was successfully prepared on SUS304 stainless steel substrate by dip-coating process. The macro residual stress existing in metal substrate was analyzed by XRD. It turns out that the compressive stress existing in the metal substrate surface layer increases with the increase of heat-treated temperature. Based on the above study, colored stainless steels of high quality were prepared by sol-gel process.

Thrombocompatibility of sol-gel titanium dioxide coatings deposited on stainless steel substrate

2008 ◽  
Vol 107 (5) ◽  
pp. 254-258
Author(s):  
B. Pietrzyk ◽  
W. Okrój ◽  
L. Klimek ◽  
B. Walkowiak
Keyword(s):  
Stainless Steel ◽  
Titanium Dioxide ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Sol Gel
Sign in / Sign up

Export Citation Format

Share Document