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在油包水(W/O)形成的反相微乳液中加入水溶性或亲水性材料形成内核,并通过硅烷化试剂在微乳液中水解后形成三维网状结构的硅壳包被内核材料,是制备核壳纳米颗粒的常规方法.我们发现核壳二者的静电相互作用对制备具有稳定核壳结构的纳米颗粒有重要影响,而内核材料的分子量大小以及包壳壳层厚度等传统意义上的重要因素与此并没有明显的关系.当用传统方法难于形成稳定核壳结构纳米颗粒时,可以通过改变实验条件,调节相关材料的电荷极性来改善其稳定性,从而为拓展核壳纳米颗粒的制备提供了实验与理论依据.
The water-soluble or hydrophilic material is added to the reverse microemulsion formed by water-in-oil (W / O) to form the inner core and hydrolyzed by the silylation reagent in the microemulsion to form a three-dimensional network structure of silicon shell coated core material Is a common method for the preparation of core-shell nanoparticles.We find that the electrostatic interaction between the core and shell has an important influence on the preparation of nanoparticles with a stable core-shell structure, while the molecular weight of the core material and the thickness of the cladding shell have the traditional significance The important factor has no obvious relationship with this.When the traditional method is difficult to form a stable core-shell nanoparticles, you can change the experimental conditions, adjust the charge polarity of related materials to improve its stability, so as to expand the nuclear shell The preparation of nanoparticles provides the experimental and theoretical basis.