Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (6): 76-80.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Preparation and Properties of UV -Curable Organic Silicone/SiO2 Hybrid Coating

Lin jin-na  Hou You-jun  Zeng Xing-rong   

  1. School of Materials Science and Engineering, South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-07-14 Online:2007-06-25 Published:2007-06-25
  • Contact: 曾幸荣，教授，E-mail: psxrzeng@scut. edu.cn E-mail:fafuljn@163.com
  • About author:林金娜(1975-)，女，在职博士生，福建农林大学交通学院讲师，主要从事有机/无机杂化材料及高性能涂料研究.
  • Supported by:

    福建省自然科学基金资助项目(2006J0150)

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Abstract:

UV -curable organic silicone/Si02 hybrid coating was prepared by using the sol-gel method , with tetraethyl-orthosilicate (TEOS) and common organic silicone as the materials， and effect of organic silicone content on the properties of hybrid films from the coating was studied. Then , the hybrid coating was characterized by means of FTIR and solid state 29Si-NMR. Moreover, the conversion of ethylene linkage and the polycondensation degree of siloxane were determined. It is found that (1) the inorganic network and organic network in the hybrid coating are joined via covalent bond; (2) the conversion of ethylene linkage and the average polycondensation degree of siloxane for the coating with 240s curing rare respectively 81. 0% and 89.5%; (3) hybrid film with high rigidity and good flexibility can be obtained by introducing linear Si-O-Si segmers in the highly crosslinked Si02 network via sol-gel method; and (4) hybrid film with optimal properties can be produced at a TEOS/MPTMS( methacrylate propyl trimethoxysilicate)/DDS( dimethyl diethylorthosilicate) mole ratio of 6: 2: 3.

Key words: organic silicone, hybrid coating, sol-gel method, UV curing