摘要
首先在超声波场中用表面活性剂SDS对纳米Ag粒子进行亲油化处理,然后在氮气保护下利用超声波的分散、粉碎、活化、引发等多重作用,在实现纳米Ag粒子在反应介质中纳米分散的同时,引发苯乙烯单体在纳米Ag粒子表面发生分散聚合反应,制备出Ag/PS(银/聚苯乙烯)复合粒子。最后对超声波引发纳米Ag粒子表面的分散聚合反应动力学进行了研究,并运用SEM、FTIR、XPS、TGA、XRD等测试手段对Ag/PS复合粒子进行了表征。
In this paper, the Ag/PS composite particles are prepared and characterized according to the following steps. First, the nano silver particles are pretreated with the surfactants SDS under ultrasonic irradiation. Second, the dispersion polymerization of styrene in a water-ethanol （1/6 wt/wt） medium, with poly（N vinyl pyrrolidone） （PVP） as stabilizer and 2.2 ＇-azobisizohutyronitrile （AIBN） as initiator in the presence of nano-silver particles is initiated with N, pnrging through uhrasonic irradiation by taking its advantages of the combined effects of dispersion, crushing, activation, and initiation. Finally, the dynamics characteristics of the dispersion polymerization are investigated, and the composite particles are characterized by SEM,FTIR, X-ray photoelectron spectroscopy （XPS）, thermogravimetric analysis （TGA） and X-ray diffraction patterns （XRD）.
基金
中国工程物理研究院科学技术预先研究基金(20050868)
关键词
复合粒子
分散聚合
超声波
composite particle, dispersion polymerization, ultrasonic irradiation
