[Ni(NH_3)_6]^(2+)为锚固剂制备SiO_2包覆的水性铝颜料  

Preparation of silica encapsulated waterborne aluminum pigments based on nickel ammonia complex ion as anchoring agent

作　　者：马志领[1] 乔艳君[1] 王献玲[1] 姜震[1] 张晨光[1] 

机构地区：[1]河北大学化学与环境科学学院,河北保定071002

出　　处：《河北大学学报（自然科学版）》2016年第2期141-147,共7页Journal of Hebei University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51302061);河北省自然科学基金资助项目(E2014201076)

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（NH3）6]2＋as anchoring agent. Fourier transform infrared spectroscopy and X-ray diffraction results showed that theboehmite was formed on the surface of aluminum flakes by[Ni（NH3 ）6]2＋ oxidizing aluminum. The resultsof scanning electron microscopy,optical microscopy and corrosion resistance test proved that by controllingthe pH of encapsulated media at about 9.5, the boehmite on aluminum flakes surface can react with silanolswhich come from the hydrolysis of tetraethoxysilane and silane. This makes a silica sol-gel film form onthe aluminum flakes surface. This sol-gel film improves the corrosion resistance of the aluminum pigments.

关 键 词：包覆铝粉 耐腐蚀性 硅溶胶-凝胶法 锚固剂 水性铝粉颜料 

分 类 号：TG174[金属学及工艺—金属表面处理]