Synthesis and Study of Epoxy-Silica Ceramers as Binder for Protective Coatings

A transparent organic-inorganic epoxy/silica hybrid material was prepared by functionalized-epoxy resin, which was partially functionalized by 3-aminopropyl triethoxylsilane (APTES), Tetraethylorthosilicate (TEOS) oligomers which was prepared through hydrolysis and condensation of TEOS with water. The structure of the hybrid materials was characterized by FT-IR spectroscopy, 29SiNMR spectroscopy and X-ray diffraction (XRD). The achieved hybrid materials then have been cured by an amine based curing agent. Morphologies of the cured films were studied by scanning electron microscopy (SEM) with energy dispersion X-ray analysis (EDAX). Particle sizes were below 100 nm. Mechanical properties such as micro hardness and pull-off adhesion were studied. The data showed that ceramer coating properties were affected by both TEOS oligomer content and coupling agent content (APTES). The experimental results illustrate that structure, morphology of the epoxy-silica based Ceramers depend on reaction parameters and curing conditions.

کلیدواژه ها:

Epoxy silica ، Ceramer ، Protective coating