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采用超临界CO2注入技术制备聚合物-无机纳米粒子复合材料,以乙醇作为共溶剂,在超临界CO2中将正硅酸乙酯(TEOS)注入到聚丙烯(PP)中,重点研究共溶剂乙醇对TEOS在PP中注入率的影响.实验结果表明注入率随着共溶剂加入先增加后减小.同时研究了在共溶剂的存在下其他实验条件对注入率的影响.并采用卢瑟福背散射能谱法(RBS)分析了聚丙烯/SiO2纳米复合材料的注入元素深度分布,发现Si元素在PP中的浓度分布不均匀,随着深度的增加而减小.
Polymer-inorganic nanoparticle composites were prepared by using supercritical CO2 injection technology. TEOS was injected into polypropylene (PP) by using ethanol as co-solvent and the co-solvent ethanol On the injection rate of TEOS in PP.The experimental results show that the injection rate increases first and then decreases with the addition of cosolvent.At the same time studied the influence of other experimental conditions on the injection rate in the presence of cosolvent.And Rutherford’s back The depth distribution of the implanted elements in the polypropylene / SiO2 nanocomposites was analyzed by the method of scatter spectroscopy (RBS). It was found that the concentration of Si in the PP was not uniform and decreased with the increase of the depth.