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Yu Chen - One of the best experts on this subject based on the ideXlab platform.
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double Layer Coating films prepared from water borne latexes of acrylate vinylidene chloride copolymers investigating their heavy duty anticorrosive properties
Industrial & Engineering Chemistry Research, 2014Co-Authors: Ce Fu, Tongxian Zhang, Fa Cheng, Yu ChenAbstract:Aqueous latexes of copolymers of vinylidene chloride (VDC) with an acrylate, namely, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), or 2-ethylhexyl acrylate (EHA), were employed to form a double-Layer Coating film for the heavy-duty anticorrosion of metal. Measurements of the water-vapor transmission rate and oxygen-gas transmission rate and electrochemical impedance spectroscopy (EIS) demonstrated that the barrier properties of MA–VDC and EA–VDC films were better than those of BA–VDC and EHA–VDC films. Among the MA–VDC and EA–VDC Coatings, EA–VDC85 showed better comprehensive properties and, thus, was selected as the top Layer of the designed double-Layer Coating film. Adhesion tests demonstrated that the BA–VDC and EA–VDC Coatings had better adhesion to tinplates than the MA–VDC and EA–VDC Coatings and, thus, were suitable for use as the bottom Layer of the designed double-Layer Coating film. The characterizations of the double-Layer Coating films by adhesion tests and EIS showed that B...
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Double-Layer Coating Films Prepared from Water-Borne Latexes of Acrylate–Vinylidene Chloride Copolymers: Investigating Their Heavy-Duty Anticorrosive Properties
Industrial & Engineering Chemistry Research, 2014Co-Authors: Tongxian Zhang, Fa Cheng, Wen-zhu Cui, Yu ChenAbstract:Aqueous latexes of copolymers of vinylidene chloride (VDC) with an acrylate, namely, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), or 2-ethylhexyl acrylate (EHA), were employed to form a double-Layer Coating film for the heavy-duty anticorrosion of metal. Measurements of the water-vapor transmission rate and oxygen-gas transmission rate and electrochemical impedance spectroscopy (EIS) demonstrated that the barrier properties of MA–VDC and EA–VDC films were better than those of BA–VDC and EHA–VDC films. Among the MA–VDC and EA–VDC Coatings, EA–VDC85 showed better comprehensive properties and, thus, was selected as the top Layer of the designed double-Layer Coating film. Adhesion tests demonstrated that the BA–VDC and EA–VDC Coatings had better adhesion to tinplates than the MA–VDC and EA–VDC Coatings and, thus, were suitable for use as the bottom Layer of the designed double-Layer Coating film. The characterizations of the double-Layer Coating films by adhesion tests and EIS showed that B...
Tongxian Zhang - One of the best experts on this subject based on the ideXlab platform.
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double Layer Coating films prepared from water borne latexes of acrylate vinylidene chloride copolymers investigating their heavy duty anticorrosive properties
Industrial & Engineering Chemistry Research, 2014Co-Authors: Ce Fu, Tongxian Zhang, Fa Cheng, Yu ChenAbstract:Aqueous latexes of copolymers of vinylidene chloride (VDC) with an acrylate, namely, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), or 2-ethylhexyl acrylate (EHA), were employed to form a double-Layer Coating film for the heavy-duty anticorrosion of metal. Measurements of the water-vapor transmission rate and oxygen-gas transmission rate and electrochemical impedance spectroscopy (EIS) demonstrated that the barrier properties of MA–VDC and EA–VDC films were better than those of BA–VDC and EHA–VDC films. Among the MA–VDC and EA–VDC Coatings, EA–VDC85 showed better comprehensive properties and, thus, was selected as the top Layer of the designed double-Layer Coating film. Adhesion tests demonstrated that the BA–VDC and EA–VDC Coatings had better adhesion to tinplates than the MA–VDC and EA–VDC Coatings and, thus, were suitable for use as the bottom Layer of the designed double-Layer Coating film. The characterizations of the double-Layer Coating films by adhesion tests and EIS showed that B...
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Double-Layer Coating Films Prepared from Water-Borne Latexes of Acrylate–Vinylidene Chloride Copolymers: Investigating Their Heavy-Duty Anticorrosive Properties
Industrial & Engineering Chemistry Research, 2014Co-Authors: Tongxian Zhang, Fa Cheng, Wen-zhu Cui, Yu ChenAbstract:Aqueous latexes of copolymers of vinylidene chloride (VDC) with an acrylate, namely, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), or 2-ethylhexyl acrylate (EHA), were employed to form a double-Layer Coating film for the heavy-duty anticorrosion of metal. Measurements of the water-vapor transmission rate and oxygen-gas transmission rate and electrochemical impedance spectroscopy (EIS) demonstrated that the barrier properties of MA–VDC and EA–VDC films were better than those of BA–VDC and EHA–VDC films. Among the MA–VDC and EA–VDC Coatings, EA–VDC85 showed better comprehensive properties and, thus, was selected as the top Layer of the designed double-Layer Coating film. Adhesion tests demonstrated that the BA–VDC and EA–VDC Coatings had better adhesion to tinplates than the MA–VDC and EA–VDC Coatings and, thus, were suitable for use as the bottom Layer of the designed double-Layer Coating film. The characterizations of the double-Layer Coating films by adhesion tests and EIS showed that B...
Fa Cheng - One of the best experts on this subject based on the ideXlab platform.
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double Layer Coating films prepared from water borne latexes of acrylate vinylidene chloride copolymers investigating their heavy duty anticorrosive properties
Industrial & Engineering Chemistry Research, 2014Co-Authors: Ce Fu, Tongxian Zhang, Fa Cheng, Yu ChenAbstract:Aqueous latexes of copolymers of vinylidene chloride (VDC) with an acrylate, namely, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), or 2-ethylhexyl acrylate (EHA), were employed to form a double-Layer Coating film for the heavy-duty anticorrosion of metal. Measurements of the water-vapor transmission rate and oxygen-gas transmission rate and electrochemical impedance spectroscopy (EIS) demonstrated that the barrier properties of MA–VDC and EA–VDC films were better than those of BA–VDC and EHA–VDC films. Among the MA–VDC and EA–VDC Coatings, EA–VDC85 showed better comprehensive properties and, thus, was selected as the top Layer of the designed double-Layer Coating film. Adhesion tests demonstrated that the BA–VDC and EA–VDC Coatings had better adhesion to tinplates than the MA–VDC and EA–VDC Coatings and, thus, were suitable for use as the bottom Layer of the designed double-Layer Coating film. The characterizations of the double-Layer Coating films by adhesion tests and EIS showed that B...
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Double-Layer Coating Films Prepared from Water-Borne Latexes of Acrylate–Vinylidene Chloride Copolymers: Investigating Their Heavy-Duty Anticorrosive Properties
Industrial & Engineering Chemistry Research, 2014Co-Authors: Tongxian Zhang, Fa Cheng, Wen-zhu Cui, Yu ChenAbstract:Aqueous latexes of copolymers of vinylidene chloride (VDC) with an acrylate, namely, methyl acrylate (MA), ethyl acrylate (EA), butyl acrylate (BA), or 2-ethylhexyl acrylate (EHA), were employed to form a double-Layer Coating film for the heavy-duty anticorrosion of metal. Measurements of the water-vapor transmission rate and oxygen-gas transmission rate and electrochemical impedance spectroscopy (EIS) demonstrated that the barrier properties of MA–VDC and EA–VDC films were better than those of BA–VDC and EHA–VDC films. Among the MA–VDC and EA–VDC Coatings, EA–VDC85 showed better comprehensive properties and, thus, was selected as the top Layer of the designed double-Layer Coating film. Adhesion tests demonstrated that the BA–VDC and EA–VDC Coatings had better adhesion to tinplates than the MA–VDC and EA–VDC Coatings and, thus, were suitable for use as the bottom Layer of the designed double-Layer Coating film. The characterizations of the double-Layer Coating films by adhesion tests and EIS showed that B...
Chanwoo Park - One of the best experts on this subject based on the ideXlab platform.
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experimental investigation of capillary assisted solution wetting and heat transfer using a micro scale porous Layer Coating on horizontal tube falling film heat exchanger
International Journal of Refrigeration-revue Internationale Du Froid, 2012Co-Authors: Batikan Koroglu, Chanwoo ParkAbstract:An experimental study was conducted to investigate the effect of a micro-scale, porous-Layer Coating on solution wetting and heat transfer of a horizontal-tube, falling-film heat exchanger. A uniform Layer of a copper powder was sintered onto plain copper tubes to create a micro-scale, porous Coating on the tubes. Distilled water was used as solution and heating fluids. When the solution was dripped onto horizontal tubes, the visual observation confirmed that plain tubes were partially wetted, while the porous-Layer coated tubes were completely wetted due to capillary action even at low solution flow rates. The comparison of the heat transfer results for two different tube surfaces (plain and porous-Layer coated) clearly showed that the porous-Layer coated tubes had twice as high evaporation heat transfer rate due to the complete solution wetting and higher heat transfer coefficient due to the thin spreading of the solution liquid.
Yu Zhou - One of the best experts on this subject based on the ideXlab platform.
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A self-adjusting PTFE/TiO2 hydrophobic double-Layer Coating for corrosion resistance and electrical insulation
Chemical Engineering Journal, 2020Co-Authors: Shuqi Wang, Yaming Wang, Yongchun Zou, Guoliang Chen, Jia-hu Ouyang, Dechang Jia, Yu ZhouAbstract:Abstract The self-adjusting polytetrafluoroethylene (PTFE)/TiO2 organic-inorganic double-Layer Coatings are designed on titanium alloy using thermal field and gradient pressure field enhanced plasma electrolytic oxidation (TGEPEO), which leads to the in-situ incorporation of PTFE nano-particles into the bottom TiO2 ceramic Coating. The PTFE top Layer with adjustable thickness is strongly bonded on a TiO2 bottom porous Layer by subsequent deposition, chemical bonding and crosslinking curing of PTFE nanoparticles during TGEPEO process. Simultaneously, the double-Layer Coating possesses promising self-cleaning function due to a special hydrophobic surface with a water contact angle of ≈138.0 ± 4.4° caused by self-adjusted surface micro-nano structure. Moreover, the PTFE/TiO2 double-Layer Coating exhibits excellent corrosion resistance and high electrical insulation. More importantly, the microstructure of the double-Layer Coating underwent self-adjustment in long-term immersion, caused by the accumulation-redeposition of corrosive ions and the closure of the reticular microchannels at the damaged regions, thus enhancing long-term chemical stability.
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Hexagonal boron nitride and alumina dual-Layer Coating for space solar thermal shielding
Chemical Engineering Journal, 2020Co-Authors: Guoliang Chen, Shuqi Wang, Yaming Wang, Yongchun Zou, Dechang Jia, Hao Wang, Jun Qiu, Jianyun Cao, Yu ZhouAbstract:Abstract Reducing the temperature of a solar probe or an orbital spacecraft has been successful in the spectral selectivity regime by maximizing the sunlight reflection and irradiating heat to the cold universe. Despite the extensive work on the adjustment of the absorbance/emissivity ratio, few efforts have been devoted to the modulation of heat conduction. In fact, the backlit-side of the spacecraft facing the cold universe is ideal for radiative cooling, as long as the sunlight generated heat is transferred effectively to the backlit surface with minimum heating of the interior structures. Here, by using a hexagonal‑boron nitride (h-BN) and Al2O3 dual-Layer Coating, we demonstrate a strategy for space solar thermal shielding that combines radiative cooling and anisotropic thermal conduction. The in-plane alignment of the top-Layer h-BN flakes to the Coating surface leads to a highly anisotropic thermal diffusion behavior, enabling rapid in-plane heat transfer and effective out-of-plane thermal insulation. The spectral selectivity optimization allows the dual-Layer Coating to reflect nearly 89% of solar irradiation while having an emissivity >0.86 across the thermal infrared wavelength. Moreover, the Coating exhibits remarkable spectral stability under proton irradiation, showing its great potential in aerospace applications.