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Chuanmin Zhang,Ran Huo,Xiaodong Wang,Junying Zhang,Jue Cheng,Ling Shi 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.89 No.-
To improve the corrosion resistance and glossiness offlaky aluminum pigments in waterborne coatings, aflaky aluminum pigment was encapsulated with poly(methylhydrosiloxane) (PMHS) as an anti-corrosionfilm by in-situ polymerization, and its chemical composition was characterized by Fourier-transforminfrared and X-ray photoelectron spectroscopy, and its morphology and microstructure was identified byscanning and transmission electron microcopy. Furthermore, its anticorrosive performance wasconfirmed by Zeta potential measurement and electrochemical impedance spectroscopy. Theencapsulatedflaky aluminum pigment not only exhibits excellent corrosion resistance but also showsan improved thermal stability due to the fabrication of a PMHS-based organosiliconfilm on the surface ofaluminumflakes. Most of all, the original glossiness and brightness could be maintained for thewaterborne coatingfilm after the encapsulatedflaky aluminum pigment was incorporated, indicating agreat application potential in waterborne coatings, water-based paints, printing inks, spray-freematerials and any more. This work provides a new strategy for design and fabrication of high corrosionresistantand high glossy aluminum pigments.
Chuanmin Chen,Wenbo Jia,Songtao Liu,Yue Cao,Bing Zhao,Jianqiao Wang 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.3
CuCl2-SCR catalysts prepared by an improved impregnation method were studied to evaluate the catalytic performance for gaseous elemental mercury (Hg0) oxidation in simulated flue gas. Hg0 oxidation activity of commercial SCR catalyst was significantly improved by the introduction of CuCl2. Nitrogen adsorption, XRD, XRF and XPS were used to characterize the catalysts. The results indicated that CuCl2 was well loaded and highly dispersed on the catalyst surface, and that CuCl2 played an important role for Hg0 catalytic oxidation. The effects of individual flue gas components on Hg0 oxidation were also investigated over CuCl2-SCR catalyst at 350 oC. The co-presence of NO and NH3 remarkably inhibited Hg0 oxidation, while this inhibiting effect was gradually scavenged with the decrease of GHSV. Further study revealed the possibility of simultaneous removal of Hg0 and NO over CuCl2-SCR catalyst in simulated flue gas. The mechanism of Hg0 oxidation was also investigated.