接枝环氧树脂/硅溶胶杂化水分散液的制备与表征

利用原位分散法制备了接枝环氧树脂 硅溶胶杂化水分散液 ,并通过红外光谱和 ζ电位测定 ,表征了接枝环氧树脂与硅溶胶之间的杂化作用 .实验结果表明 ,与接枝环氧树脂水分散液相比 ,杂化水分散液的粒径和粘度均减小 .按此探讨了形成杂化水分散液的历程 .初步测定了杂化水分散液成膜后的表面性能 ,发现它们具有更高的硬度和更好的疏水性能 ,与成膜过程中硅溶胶在膜表面的富集效应有关

PREPARATION AND CHARACTERIZATION OF WATERBORNE EPOXY RESIN/SILICA SOL HYBRID WATER DISPERSIONS

Waterborne epoxy resin/silica sol hybrid dispersions were prepared by in-situ dispersion of graft epoxy resin with both the silica sol and water simultaneously.The hybrid interaction between the graft epoxy resin and the silica sol with different particle sizes was observed through the measurements of FT-IR spectra and ζ potential.Compared with the graft epoxy resin water dispersion,the hybrid dispersions exhibited lower viscosity and smaller particle size.In this case,a mechanism of forming the hybrid water dispersion was proposed and discussed.Some surface properties of films prepared from these hybrid water dispersions were measured.The higher hardness and better water resistance for such surfaces of films were observed,resulting from the enrichment of silica sols on the surfaces of the hybrid films.