以溶胶-凝胶-模板技术制备了小粒径介孔二氧化硅纳米粒子(MSNs),进一步接枝甲基丙烯酸羟乙酯(HEMA)、异佛尔酮二异氰酸酯(IPDI)制备出乙烯基硅单体(Vs)。以丙烯酸酯类单体为原料与Vs共聚,制备了一系列Vs改性水性丙烯酸树脂。采用红外光谱仪(FT-IR)、X射线光电子能谱仪(XPS)、透射电镜(TEM)等手段对改性树脂及树脂膜材料进行了表征,并测试了胶乳的贮存稳定性及胶膜的硬度、附着力等性能。结果表明:介孔二氧化硅纳米粒子表面接枝率可达到19.2%;制备的Vs改性树脂乳液粒径均一,胶乳分散性好,经过6个月静态储存基本稳定。当Vs加入量达到1%时,改性丙烯酸树脂胶膜性能最佳,硬度达到3H,附着力1级,涂膜拉伸强度达到7.4MPa,水接触角91.7°。
Small size mesoporous silica nanoparticles (MSNs) were prepared by sol-gel template technique,and further grafted with hydroxyethyl methacrylate (HEMA) and isophorone diisocyanate (IPDI) to prepare vinyl silicon monomer (Vs).Ultimately,a series of Vs modified waterborne acrylic resins were prepared by copolymerization of Vs with acrylate monomers.The modified resin and resin film materials were characterized by FT-IR,XPS and TEM.The storage stability of the latex and the hardness and adhesion of the film were tested.The results showed that the grafting rate on the surface of mesoporous silica nanoparticles reached 19.2%.The Vs modified resin emulsion had uniform particle size and good latex dispersion,and was basically stable after 6 months of static storage.As the amount of Vs reached 1%,the performance of the modified acrylic resin film was the best,with a hardness of 3H,adhesion grade 1,a tensile strength of 7.4MPa,and a water contact angle of 91.7°.
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基金资助
安徽省水基高分子材料高性能化工程实验室2021年度开放课题(校政化[2021]21号);安徽省2017年度科技计划重点项目(1704A0902018)
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