| abstract |
The invention relates to a nonspherical particle preparation method based on change of hydrophilicities and crosslinking degrees of seeds. The method comprises the steps: firstly a series of polymer seeds having different surface hydrophilicities and crosslinking degrees are prepared and then are swollen with monomers incompatible with the polymer seeds; according to different phase separation degrees of polymers which are induced by different interfacial tensions and incompatible with the seeds, and under combined action of the interfacial tension and the crosslinking seed elastic force, the new polymers are separated with the seeds, and thus a series of nonspherical composite particles having different micro morphologies are successfully synthesized. The method adopts the soap-free emulsion polymerization, takes water as a dispersion phase, and can prepare the nonspherical composite particles having the different morphologies and being easy to separate and process. The synthesis process is simple and feasible, is clean and environmentally friendly, is easy for large-scale production, moreover, has universality, and is applicable to other polymer systems incompatible with each other. |