Abstract： Micr oencapsulated paraffin-polyurea phase change materials were prepared by the method of interfacial polymerization using composite paraffin with solid-liquid mass ratio of 3∶7 as core materials, 2, 4-toluene diisocyanate and ethylenediamine as monomers, octylphenolethoxylates as an emulsifier. The effects of emulsion speed, the amount of emulsifier and polymerization temperature on the particle size, coating efficiency and storage-energy performance of microencapsulated paraffin-polyurea phase change materials were investigated. The results show that when the emulsion speed is 2 000 r/min, the mass ratio of emulsifier to core material is 0.06 and the polymerization temperature is 70 ℃, the microencapsulated paraffin-polyurea phase change materials have better performance,including the the average particle size of 3 to 4 μm, melting point of 28.1 ℃, enthalpy of 58.4 kJ/kg, and coating efficiency of 87.5%.

Keywords: phase change materials; sparaffin; microcapsule; interfacial polymerization

中图分类号：TB34，TQ316        文献标志码：A

文章编号：1008-5548（2014）06-0066-04

DOI:10.13732/j.issn.1008-5548.2014.06.016

收稿日期：2014-01-12， 修回日期：2014-02-16，在线出版时间：2014-12-22。

基金项目：中南林业科技大学人才引进资助项目，编号：2011-243。

第一作者简介：喻胜飞(1971—)，女，博士，副研究员，研究方向为复合材料的制备及表征。 E-mail：yushengfei503@sina.com。