[Ni(NH_3)_6]~(2+)为锚固剂制备SiO_2包覆的水性铝颜料
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摘要
采用[Ni(NH_3)_6]~(2+)作为锚固剂制备SiO_2包覆的水性铝颜料.红外光谱和X线衍射表明[Ni(NH_3)_6]~(2+)氧化金属铝在铝片表面形成勃姆石结构的羟基铝化合物.扫描电子显微镜,光学显微镜和耐腐蚀性能测试证明,pH在9.5左右,勃姆石可与正硅酸乙酯和硅烷偶联剂的水解产物结合,在铝片表面形成一层SiO_2膜,达到提高铝颜料耐腐蚀性的目的.
The silica encapsulated waterborne aluminum pigments were prepared using[Ni(NH_3)_6]~(2+)as anchoring agent.Fourier transform infrared spectroscopy and X-ray diffraction results showed that the boehmite was formed on the surface of aluminum flakes by[Ni(NH_3)_6]~(2+) oxidizing aluminum.The results of scanning electron microscopy,optical microscopy and corrosion resistance test proved that by controlling the pH of encapsulated media at about 9.5,the boehmite on aluminum flakes surface can react with silanols which come from the hydrolysis of tetraethoxysilane and silane.This makes a silica sol-gel film form on the aluminum flakes surface.This sol-gel film improves the corrosion resistance of the aluminum pigments.
The silica encapsulated waterborne aluminum pigments were prepared using[Ni(NH_3)_6]~(2+)as anchoring agent.Fourier transform infrared spectroscopy and X-ray diffraction results showed that the boehmite was formed on the surface of aluminum flakes by[Ni(NH_3)_6]~(2+) oxidizing aluminum.The results of scanning electron microscopy,optical microscopy and corrosion resistance test proved that by controlling the pH of encapsulated media at about 9.5,the boehmite on aluminum flakes surface can react with silanols which come from the hydrolysis of tetraethoxysilane and silane.This makes a silica sol-gel film form on the aluminum flakes surface.This sol-gel film improves the corrosion resistance of the aluminum pigments.
引文
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[2]LIU H,YE H Q,ZHANG Y C,et al.Preparation and characterization of poly trimethylolpropane triacrylate)/flaky aluminum composite particle by in situ polymerization[J].Dyes and Pigments,2008,79:236-241.DOI:10.1016/j.dyepig.2008.03.001.
[3]LI L J,PI P H,WEN X F,et al.Optimization of sol-gel coatings on the surface of aluminum pigments for corrosion protection[J].Corros Sci,2008,50:795-803.DOI:10.1016/j.corsci.2007.11.002.
[4]黄舒丽,周涛,史静,等.铝粉表面的多层包覆及其性能研究[J].中国科技论文在线,2008:150-153.HUANG Shuli,ZHOU Tao,SHI Jing,et al.Investigation on multi-coating of platelet-like aluminum fore effect-pigment[J].Sciencepaper Online,2008:150-153.
[5]李利君,皮丕辉,文秀芳,等.硅烷偶联剂改性的纳米二氧化硅包覆铝颜料的制备及其耐碱性能[J].腐蚀与防护,2007,28(9):458-461.LI Lijun,PI Pihui,WEN Xiufang,et al.Preparation and alkali resistant of aluminum pigments encapsulated by nano-silicone dioxide modified by Silane coupling agent[J].Corros Prot,2007,28(9):458-461.
[6]LI L J,PI P H,WEN X F,et al.Aluminum pigments encapsulated by inorganic-organic hybrid coatings and their stability in alkaline aqueous media[J].Coat Technol Res,2008,5(1):77-83.DOI:10.1007/s11998-007-9053-9.
[7]KARLSSON P M,BAEZA A,PALMQVIST A,et al.Surfactant inhibition of aluminum pigments for waterborne printing inks[J].Corrosion science,2008,50(8):2282-2287.DOI:10.1016/j.corsci.2008.06.014.
[8]RUSSELL J,FARMER V,LEWIS D.Lattice vibrations of boehmite(γ-AlOOH):Evidence for a C122vrather than a D172h space group[J].Spectrochimica Acta,1978,34:1151-1153.DOI:10.1016/0584-8539(78)80073-7 122vC172hD.
[9]LEWIS D G,FARMER V C.Infrared absorption of surface hydroxyl groups and lattice vibrations in lepidocrocite(γ-FeOOH)and boehmite(γ-AlOOH)[J].Clay Minerals,1986,21:93-100.DOI:10.1180/claymin.1986.021.1.08.
[10]朱振峰,张政阳,刘辉,等.规律排列束状勃姆石纳米线的制备[J].功能材料,2012,43(2):163-165.ZHU Zhenfeng,ZHANG Zhengyang,LIU Hui.Preparation of bunches of aligned boehmite nanowires[J].Functional materials,2012,43(2):163-165.
[11]MADEJOVA J,KOMADEL P.Baseline studies of the clay minerals society source clays[J].Infrared Methods Clays and Clay Minerals,2001,49(5):410-432.DOI:10.1346/CCMN.2001.0490508.
[12]ROBERT J S,JOSEPH R F,TIMOTHY E M,et al.Adsorption of pepsin by aluminum hydroxideⅠAdsorption Mechanism[J].Journal of Pharmaceutical Sciences,1984,73(11):1514-1517.DOI:10.1002/jps.2600731104.
[13]TSAI M S,YANG F H.Boehmite modification of nano gradeα-alumina and the rheological properties of the modified slurry[J].Cera mics International,2007,33(5):739-745.DOI:10.1016/j.ceramint.2005.12.015.
[14]LANGE N A,DEAN J A,SHANG J F,et al.Lange's chemistry handbook of chemistry[M].1994:380.