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Measurements of Formaldehyde and TVOC Emission from Paints and coating materials using Small Chamber Method for Building Composites

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Journal of Wuhan University of Technology(materials Science) 2012年第1期27卷 120-125页

作者： Jin-A KIM Sumin KIM Hyun-Joong KIM Janghoo SEO National Instrumentation Center for Environmental Management Seoul National University Seoul 151-921 Republic of Korea Laboratory of Adhesion & Bio-Composites Program in Environmental Materials Science Seoul National University Seoul 151-921 Republic of Korea Building Environment & materials Lab School of Architecture Soongsil University Seoul 156-743 Republic of Korea School of Architecture Chosun University Gwangju 507-759 Korea

An optimal test method for paint is proposed; additionally, the Field and Laboratory Emission Cell （FLEC） method used in Europe is applied as a substitute for the 20 L small chamber method. The emission factors of total volatile organic compounds （TVOC） and formaldehyde from oil-based paint, emulsion paint, and water-dispersion paint with a coating weight of 300 g/m2, cured for 24/48 hours, were measured using the 20 L small chamber method. The emission rate of TVOC and formaldehyde from all paints began to stabilize after approximately 7 days after 24/48 hours of curing even though Korean standards stipulate that paint should be measured and analyzed after the third day of application. The emission factor of TVOC and formaldehyde from oil-based, emulsion, and water-dispersion paints were also measured using the FLEC method. There was good correlation between the 20 L small chamber method and the FLEC method for oil-based, emulsion, and water-dispersion paint emissions. With the FLEC method, using paints prepared under identical conditions, the emission rate was stable 24 hours after installation of samples because the air flow rate of FLEC is much higher than that of a 20 L small chamber, and the relative cell volume of FLEC is much smaller than that of a 20 L small chamber.

关键词： formaldehyde TVOC paints coating materials FLEC

Preparation of sulfur hydrophobized plasmonic photocatalyst towards durable superhydrophobic coating material

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Journal of materials Science & Technology 2020年第6期41卷 159-167页

作者： Emese Lantos LászlóMérai ágota Deák Juan Gómez-Pérez Dániel Sebo?k Imre Dékány Zoltán Kónya LászlóJanovák University of Szeged Interdisciplinary Excellence CentreDepartment of Physical Chemistry and Materials ScienceH-6720Rerrich Béla tér 1SzegedHungary University of Szeged Interdisciplinary Excellence CentreDepartment of Applied and Environmental ChemistryH-6720Rerrich Béla tér 1SzegedHungary

The widely used photocatalytic self-cleaning coating materials are often made of polymers and polymer based composites,where the photocatalyst immobilization occurs with ***,these organic polymers are often unstable under exposure to UV irradiation and easily degraded by reactive radicals produced in the photocatalytic *** order to solve this problem,in this paper,we present the facile preparation of a multifunctional coating with dual superhydrophobic and photocatalytic properties,where the fixation and the hydrophobization of the plasmonic Ag-TiO2 photocatalyst particles with visible light activity was performed with non-water soluble sulfur,which is a cheap and easily available *** resulted novel nanocomposite with rough and nano-tructured surface roughness(1.25–2.45 nm determined by small-angle X-ray scattering)has sufficient low surface energy(3.3 mJ/m2)for superhydrophobic(θ=151.1°v)***,in contrast of the organic and expensive fluoropolymer based composites,this non-wetting nature was durable,because the measured was higher than 150°during the long-term LED(λmax=405 nm)light irradiation.

关键词： Nanocomposite coating materials Wetting Lotus-type structure Visible light photocatalyst

Plasma Sprayed NiAl Intermetallic coating Produced with Mechanically Alloyed Powder

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Journal of materials Science & Technology 2011年第9期27卷 816-820页

作者： Mehrshad Moshref Javadi Hossein Edris Mahdi Salehi Marine Engineering Department Maleke-Ashtar University of Technology Department of materials Engineering Isfahan University of Technology

In the present research, mechanically alloyed Ni-AI powder was utilized to develop plasma sprayed coatings, and the effect of the spray distance and heat treatment on the phases, microstructure, and hardness of the coat- ings were examined. coatings were analyzed by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, energy-dispersive spectroscopy （EDS） and through microhardness measurements. Although mechanically alloyed Ni-AI powder showed no intermetallic phases, the coatings did. Different spray distances from 5 to 19 cm were employed for plasma spray and the specimens were heat treated at different temperatures, then the amount of oxides, porosity and hardness of the coatings were changed according to the spray condition. The thermal energy of the plasma spray caused the formation of NiAI phases while particles flew to the substrate or after that. Extreme increase in heat treatment temperature and spray distance resulted in oxidation and reduction in the quality of the coating. Furthermore, the best spray distance and heat treatment temperature to gain the NiAI intermetallic coating were established.

关键词： coating materials Intermetallics Phase transformation Plasma spray

Compositional dependence of microstructure and tribological properties of plasma sprayed Fe-based metallic glass coatings

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Science China(Technological Sciences) 2012年第5期55卷 1335-1342页

作者： YANG Qin LI Ran LIU ZengQian SHI MinJie LUO XueKun ZHANG Tao Key Laboratory of Aerospace materials and Performance(Ministry of Education) School of Materials Science and EngineeringBeihang UniversityBeijing 100191China

Gas-atomized powders of three Fe-based glass-forming alloys were sprayed on mild steel substrates by atmospheric plasma spaying using the same spaying parameters. Microstructures, thermal stabilities and tribological properties of the sprayed coatings were analyzed. The coating performances showed a strong dependence on the intrinsic characters of the compositions, i.e., glass-forming ability （GFA） and supercooled liquid region （ATx）. The coatings tended to exhibit higher amorphous phase fraction for the composition with higher GFA and lower porosity for that with larger ATX. All the coatings exhibited superior wear resistance compared with the substrate. Higher wear resistance could be obtained in coatings with higher amorphous phase fraction, i.e. higher GFA of the composition. This study has important implications for composition selecting and optimizing in the fabrication of metallic glass coatings.

关键词： metallic glasses microstructure rapid-solidification coating materials X-ray diffraction

Antibacterial activities and corrosion behavior of novel PEO/nanostructured ZrO_2 coating on Mg alloy

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Transactions of Nonferrous Metals Society of China 2018年第8期28卷 1571-1581页

作者： Mohammadreza DAROONPARVAR Muhamad Azizi MAT YAJID Rajeev KUMAR GUPTA Noordin MOHD YUSOF Hamid Reza BAKHSHESHI-RAD Hamidreza GHANDVAR Ehsan GHASEMI Department of materials Manufacturing and Industrial EngineeringFaculty of Mechanical Engineering Universiti Tetalologi Malaysia 81310 Johor Bahru Johor Malaysia Department of Chemical and Biomilecular Engineering Corrosion Engineering Program The University of Akron Akron OH-44325 United States of America Advanced materials Research Center Department of Materials Engineering Najafabad Branch Islamic Azad University Najafabad Iran Department of Clinical Sciences Faculty of Veterinary Medicine University of Tehran Tehran Iran

Plasma electrolytic oxidation（PEO） was developed as a bond coat for air plasma sprayed（APS） nanostructure ZrO2 as top coat to enhance the corrosion resistance and antibacterial activity of Mg alloy. Corrosion behavior and antibacterial activities of coated and uncoated samples were assessed by electrochemical tests and agar diffusion method toward Escherichia coli（E. coli） bacterial pathogens, respectively. The lowest corrosion current density and the highest charge transfer resistance, phase angle and impedance modulus were observed for PEO/nano-ZrO2 coated sample compared with those of PEO coated and bare Mg alloys. Nano-ZrO2 top coat which has completely sealed PEO bond coat is able to considerably delay aggressive ions transportation towards Mg alloy surface and significantly enhances corrosion resistance of Mg alloy in simulated body fluid（SBF） solution. Moreover, higher antibacterial activity was also observed in PEO/nano-ZrO2 coating against bacterial strains than that of the PEO coated and bare Mg alloys. This observation was attributed to the presence of ZrO2 nanoparticles which decelerate E. coli growth as a result of E. coli membranes.

关键词： Mg alloy ceramics coating materials microstructure scanning electron microscopy (SEM)

Behavior of Deuterium in Boron Films Covered by Oxygen-Containing Layer

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Southwestern Institute of Physics Annual Report

Southwestern Institute of Physics Annual Report 2004年第1期 50-51页

作者： WANG Mingxu H. Miyauchi T. Nakahata Y. Nishikawa Y. Oya N. Noda K. Okuno 不详 Radiochemistry Research Laboratory Faculty of Scienc： Shizuoka University Shizuoka Japan Radioisotope Center. The Univensity of Tokyo Tokyo Japan National Institute for Fusion Science Toki-Shi Japan

Boron is an attractive candidate of the first wall coating materials in fusion reactors. The behavior of deuterium implanted into boron films has been studied . This paper reports the effect of thin oxygen-containing boron layer on the behavior of deuterium im- planted into boron film by X-ray photoelectron spectroscopy （XPS） and thermal desorption spectroscopy （TDS）.

关键词： Boron films coating materials