writer：GAO Ai-huan, PI Pi-hui, WEN Xiu-fang, ZHENG Da-feng, CAI Zhi-qi, CHENG Jiang, YANG Zhuo-ru
keywords：encapsulation,aluminum pigment, polyacrylate, SiO2, in-situ polymerization
source：期刊
specific source：JOURNAL OF SHAANXI UNIVERSITY OF SCIENCE & TECHNOLOGY
Issue time：2010年
Double-layer encapsulated aluminum pigments were prepared by first encapsulating vinyl actived SiO2through sol-gel method, and secondly coating with polyacrylate by in-situ polymerization to promote anti-corrosion of aluminum pigments and enhance improved adhesion in coating. The encapsulated aluminum pigments were characterized by means of FTIR,XPS, BET and SEM. Subsequently the effect of encapsulation on metallic appearance, the stability of aluminum pigments in acid corrosion media and adhesion of PA/SiO2/Al in coating were characterized byL-value, acid-dipping test and pulling-off test respectively. The results demonstrate that uniform and compact SiO2-polymeric films have been formed on the surface of aluminum pigments. The anti-corrosion of encapsulated aluminum pigments and their compatibility with resins are improved remarkably.