草莓型聚合物微囊的制备及表征

Synthesis and Characterization of Raspberry-like Polymer Microcapsule

通过蒸馏沉淀聚合法制备的聚α-甲基丙烯酸核微球与St?ber法合成修饰氨基的二氧化硅冠微球,两者自组装得到草莓型核-冠微球。并以此为模板,制备草莓型聚合物微囊。通过傅里叶红外光谱、X射线光电子能谱研究了复合微球形成机理,通过透射电子显微镜分析了不同含量交联剂对聚合物微囊壁厚的影响。结果表明:复合微球形成机理是COO^-与NH_3^+间的静电作用;DVB加入量0.5 mL时,草莓型聚合物微囊壳层厚度及凸起明显度最为恰当。

The nuclear crown PMAA @ SiO2 was obtained by self-assembly with PMAA and silica particles withamino-groups on the surfaces, as the next step polymerization template, raspberry-like polymer microcapsules structurewas got. The formation mechanism of polymer microspheres were investigated by fourier transform infrared spectrometer（FT-IR） and X-ray photoelectron spectroscopy （XPS）, the influence of different content crosslinking agent on themicrocapsule＇s wall thicknesst was determined by TEM. The formation mechanism of polymer microspheres was theelectrostatic interaction between COO- and NH3, when the content of DYB was 0. 5 mL, the strawberry type polymermicrocapsule shell thiekness and raised obviously degree was the most appropriate.