Title:
METHOD FOR PREPARING PARAFFIN MICROCAPSULE PHASE-CHANGE MATERIAL MODIFIED BY GRAPHENE OXIDE
Document Type and Number:
WIPO Patent Application WO/2016/029527
Kind Code:
A1
Abstract:
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.
Inventors:
LU HONGBIN (CN)
ZHANG QIUXIANG (CN)
CHEN JIANHUA (CN)
TAN WEI (CN)
WANG JINXIN (CN)
LU YU (CN)
ZHANG QIUXIANG (CN)
CHEN JIANHUA (CN)
TAN WEI (CN)
WANG JINXIN (CN)
LU YU (CN)
Application Number:
PCT/CN2014/087800
Publication Date:
March 03, 2016
Filing Date:
September 29, 2014
Export Citation:
Assignee:
HAIAN INST OF HIGH TECH RES NANJING UNIVERSITY (CN)
International Classes:
C09K5/06; B01J13/02
Domestic Patent References:
| WO2013012907A2 | 2013-01-24 |
Foreign References:
| CN103752234A | 2014-04-30 | |||
| CN104001458A | 2014-08-27 | |||
| US20130308279A1 | 2013-11-21 |
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