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利用超声波的分散、粉碎、活化、引发等多重作用,在实现无机纳米粒子在反应介质中均匀分散的同时,引发单体在无机纳米粒子表面进行分散聚合反应,制备出了无机/有机复合粒子。运用有限元分析方法,计算模拟了超声波场下分散聚合体系中的温度分布场,结合超声波的传热及传质过程,提出了超声波场作用下分散聚合的反应是分区域分阶段逐步进行的反应机理。通过无机纳米粒子存在下的苯乙烯(St)体系分散聚合反应的研究,提出了无机/有机复合粒子的成核及增长过程的“石榴”模型。
The inorganic / organic composite particles were prepared by disperse, pulverizing, activating and inducing ultrasonic waves to disperse the polymerization reaction of inorganic nanoparticles on the surface of the inorganic nanoparticles while realizing the uniform dispersion of the inorganic nanoparticles in the reaction medium. Using finite element analysis method, the temperature distribution field in the dispersion polymerization system under ultrasonic field was simulated. Combined with the heat and mass transfer processes of ultrasonic wave, the reaction of the dispersion polymerization under the action of ultrasonic field was proposed to be the step-by-step reaction mechanism. Based on the investigation of dispersion polymerization of styrene (St) in the presence of inorganic nanoparticles, a “pomegranate” model of nucleation and growth of inorganic / organic composite particles was proposed.