Journal of Radiation Research and Radiation Processing ›› 2019, Vol. 37 ›› Issue (5): 4-050203-10.doi: 10.11889/j.1000-3436.2019.rrj.37.050203

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Radiation-grafting modification of hollow mesoporous silica microspheres and their application in anti-corrosive coatings

JIANG Meng(),SHU Jingjing,JIN Hanqing,LIU Yixuan,WANG Mozhen(),GE Xuewu   

  1. Key Laboratory of Soft Matter Chemistry, Chinese Academy of Sciences, Department of Polymer Science and Engineering, Shool of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
  • Received:2019-04-18 Revised:2019-04-29 Accepted:2019-04-29 Online:2019-10-20 Published:2019-10-15
  • Contact: Mozhen WANG E-mail:jm1997@mail.ustc.edu.cn;pstwmz@ustc.edu.cn
  • Supported by:
    National Natural Science Foundation of China(51573174);the Fundamental Research Funds for the Central Universities(WK3450000004)

Abstract:

In this work, grafting polymerization of dimethylaminoethyl methacrylate was induced by γ-ray radiation on hollow mesoporous silica microspheres of diameter 230 nm, which were prepared using a hard-template method. The prepared microspheres have a uniform cavity structure and controllable pore size (3~10 nm). Benzotriazole (BTA) was loaded by vacuum perfusion into the polydimethylaminoethyl-methacrylate-coated hollow mesoporous silica microspheres. The load capacity of BTA was as high as 22.8% (mass fraction). The pH-responsive release behavior of BTA from the microspheres in aqueous solutions with different pH values was investigated. The cumulative release amount in acidic solution was higher than those in basic and neutral solutions. The BTA-loaded microspheres can be mixed homogenously with a waterborne polyurethane coating. The electrochemical experiments showed that the composite coating has an excellent anti-corrosion property on the Cu electrode. The results indicate that hollow mesoporous silica microspheres modified by the radiation-grafting method have application prospects in the field of anti-corrosive metal coatings.

Key words: Radiation grafting, Hollow-mesoporous silica microspheres, pH responsive, Benzotriazole, Anti-corrosive coating

CLC Number: 

  • TL13