不同形貌PSt/PGMA双面粒子的制备和表征

Synthesizing and Characterizing Various Morphologies of PSt/PGMA Janus Particles

摘要:

以溶剂挥发法制备单分散PSt/PGMA双面粒子，挥发溶剂二氯甲烷，球形液滴发生相分离，得到具有双面结构的PSt/PGMA聚合物颗粒。通过控制聚合物PSt和聚合物PGMA的分子量，得到不同双面结构的PSt/PGMA复合微球。研究了乳化剂种类及浓度对PSt/PGMA双面粒子形态的影响，依靠荧光染色分析和EDS能谱分析，得出两种聚合物相分离过程不完全，确定出了PSt/PGMA双面粒子的结构，较大半球主要为PGMA，较小半球主要为PSt，且随着分子量的增大，PGMA倾向于包覆PSt部分。

Abstract:

The emulsion droplet solvent evaporation method has been used to prepared the PSt/PGMA monodisperse janus particles, as solvent DCM evaporated, the spherical droplets phase separated, resulting in janus morphology composite particles. The different janus morphology PSt/PGMA composite particles were prepared by controlling the molecular weights of PSt and PGMA. The effect of different type of the emulsifier and its concentration on the particles morphology were researched. Fluorescence microscopy observation and EDS energy dispersive spectrometer results confirmed that the large hemisphere mainly is PGMA, the small hemisphere mainly is PSt, the phase-separation process in these two polymer is not yet complete, with the molecular weight increased, PGMA tend to engulf PSt component.