A Novel Approach for Preparing Red Phosphorus Microcapsule by Hydrothermal Method

Abstract

A novel and effective protocol for the surface modification of the red phosphorus microcapsule via interfacial polymerization using hydrothermal method is reported. Composite microcapsules consisting of polymer-coated red phosphorous were prepared by interfacial polymerization of isocyanate and ethylenediamine in hydrothermal synthesis vessel. The morphology and magnetic property of microcapsules were characterized by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). Meanwhile, the water absorption and particle size distribution were examined. The relationship between the content of dispersants and the particle size of microencapsulated red phosphorus was investigated. On the basis of the experimental results, it seemed reasonable to conclude that the smaller the particle size of red phosphorus microcapsule was the better dispersibility in polymer, and then the higher flame retardant capability of polymer.