多功能水性铝粉颜料的制备及应用

SiO₂包覆铝粉(Al@SiO₂)是目前应用最广的水性金属颜料, 但Al@SiO₂仍为银色, 且不能耐强酸强碱腐蚀.依据SnO₂的特性,SnO₂包覆铝粉(Al@SnO₂)可制得耐腐蚀性更优的水性金属颜料,且该颜料兼具光催化活性和隐身性能.本文前驱体采用无水四氯化锡/异丙醇,反应介质采用异丙醇/水,探讨了核为铝片,壳为SnO₂,桥为Al(OH)₃或Sn(OH)₂的Al@SnO₂在弱酸性条件下的制备原理.采用光学显微镜、X衍射、光催化降解效率和耐腐蚀性测试等表征手段,探讨了制备条件对Al@SnO₂水性颜料的耐腐蚀性,色相及光催化性能的影响.

Preparation and application of multifunctional waterborne aluminum pigment

SiO₂ encapsulated aluminum pigment(Al@SiO₂)is the most widely used waterborne metal pigment. However, Al@SiO₂ is still silvery and the anti-corrosion property in strong alkalinity and acidity media are limited. According to the characteristics of SnO₂, if SnO₂ is encapsulated on aluminum pigment, the waterborne aluminum pigment with superior corrosion resistance and photocatalytic activity would be obtained. Here, SnCl₄/isopropyl as precursor in isopropyl/H₂O at weak acidity media, the preparation principle of SnO₂ encapsulated aluminum pigment(Al@SnO₂)that used aluminum as core, SnO₂ as shell and Al(OH)₃ or Sn(OH)₂ as bridge were studied. The effect of preparation conditions on the anti-corrosion resistance, hue and photocatalytic activity of Al@SnO₂ were studied using optical microscopy, X-ray diffraction, anti-corrosion resistance and photocatalytic degradation efficiency test.