METHOD FOR PREPARING PARAFFIN MICROCAPSULE PHASE-CHANGE MATERIAL MODIFIED BY GRAPHENE OXIDE

摘要

Provided is a method for preparing a paraffin microcapsule phase-change material modified by graphene oxide. The technical solution comprises: adding a concentrated acid and a strong oxidant to a low-temperature ice-water bath to oxidize graphite; successively adding deionized water, hydrogen peroxide and hydrochloric acid, vacuum filtrating, drying and grinding to obtain graphene oxide, and then adding the graphene oxide into deionized water to prepare a graphene oxide solution; adding paraffin, a non-ionic emulsifier and an ionic emulsifier into a stirring kettle, increasing the temperature and adding graphite under stirring to obtain a paraffin emulsion; adding an initiator into the paraffin emulsion for dissolution and dropwise adding monomers, vacuum filtrating after the completion, washing with petroleum ether, water-washing, drying in vacuum and crushing to obtain the paraffin microcapsule powder. The preparation method has the following beneficial effects: by the reaction of various oxygen-containing groups on the surface of the graphite oxide and the polymer, the thermal stability and the thermal conductivity of the paraffin microcapsule phase-change material are improved, and the service life is prolonged; the preparation is easy and environmentally friendly. The paraffin microcapsule phase-change material can be used in the fields such as building energy saving, thermal insulation products and floor heating, etc.