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玻璃珠 /聚砜核壳型微球可用于分离过程中的吸附介质和催化剂的载体。基于相转化原理 ,提出了向聚砜的二甲基甲酰胺 (DMF)溶液中先加入乙醚再加入水的分步溶胶凝胶法 ,制备出了核壳型玻璃珠 /聚砜微球。通过扫描电子显微镜、红外光谱和 X光电子能谱检测表明形成了单分散性良好、聚砜膜厚度为几μm的核壳型微球 ,且聚砜薄膜的表面致密。该制备方法的聚砜利用率高于 80 % ,玻璃珠的利用率接近 10 0 %。乙醚加入量对微球性质影响较小 ,但其与DMF溶液的体积比要求大于 4 .5。实验结果表明 ,分步溶胶凝胶过程是一种高效制备玻璃珠 /聚砜核壳型微球的方法
Glass beads / polysulfone core-shell microspheres can be used in the separation process of the adsorption medium and the catalyst carrier. Based on the principle of phase inversion, a step-shell sol-gel method was proposed to add dimethyl ether formamide (DMF) to polysulfone firstly and then water was added to prepare core-shell glass beads / polysulfone microspheres. Scanning electron microscopy, infrared spectroscopy and X-ray photoelectron spectroscopy showed that the monodispersed monolayer microspheres with a thickness of several μm were formed, and the surface of the polysulfone film was dense. The polysulfone utilization of the preparation method is higher than 80%, and the utilization of glass beads is close to 100%. The amount of ether added has little effect on the properties of the microspheres, but the volume ratio of the ether to DMF solution is greater than 4.5. The experimental results show that the step-by-step sol-gel process is an efficient method for preparing glass beads / polysulfone core-shell microspheres