Inorganic-Organic Hybrid Microcapsules:Preparation Technology and Applications in Anti-wear and Corrosion-resistant Coatings
LIU Xiaoying1,2,*, RUAN Wenlin1, ZHANG Yuxin3, RAO Jinsong3, YIN Changqing3, ZHANG Xianming1,2, LIU Yunqi2,4
1 College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China 2 Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Technology and Business University, Chongqing 400067, China 3 College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China 4 State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, Shandong, China
Abstract: Microcapsules' combination with the coating substrate is considered to be an effective way to enhance the anti-wear and anti-corrosion pro-perties of coatings, which is of great significance to the research of anti-wear and anti-corrosion of coatings. Common microcapsules are made of organic materials, such as polysulfone (PSF), polyurea formaldehyde (PUF), polymelamine formaldehyde (PMF), polyurea (PU), etc. When they combined with inorganic materials to make hybrid shells, the temperature resistance and compatibility of microcapsules are promoted, can adjust permeability as well as mechanical strength effectively. Nano clay, nano-SiO2, nano-CaCO3, nano-Al2O3 and carbon nanotubes become good materials for the synthesis of hybrid shell. The inorga-nic-organic hybrid microcapsules have strong temperature resistance, simultaneously mechanical and physical stability are improved. Microcapsules coated with oily substances or ionic liquids are often used to prepare coatings with self-lubricating and self-healing properties, which are widely used in anti-wear and corrosion resistance. At present, the preparation methods of inorganic-organic hybrid microcapsules are mainly solvent evaporation, Pickering emulsion polymerization, in situ polymerization and interfacial polymerization. The solvent evaporation method is simple and easy to operate. Pickering emulsion method can effectively improve the entrapment efficiency. In situ polymerization is easy balling, large coating amount and no by-products. Interfacial polymerization has the advantages of high speed, mild reaction process. In this paper, the preparation methods of inorganic-organic hybrid microcapsules are discussed, and the anti-wear and anti-corrosion mechanism of microcapsules is briefly described. Based on the classification of preparation methods, the specific application of microcapsules in enhancing the related properties of polymer organic coatings is summarized. Finally, the preparation and application of inorganic-organic hybrid microcapsules are prospected, in order to provide reference for the application of microcapsules in more fields.
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2023, Vol. 37 
