%0 Journal Article
%T Preparation and Characterization of Microencapsulated Phase Change Liquid Paraffin<br>液体石蜡相变微胶囊的制备及性能表征
%A XU Zhe
%A LI Jian-qiang
%A <br>徐哲
%A 李建强
%J 过程工程学报
%D 2012
%I 
%X As a novel type of low-temperature phase change materials, the microcapsules with the core of liquid paraffin and shell of melamine-formaldehyde resin (MF resin) were synthesized by using in-situ polymerization process. The effects of emulsion formulations, pre-polymerization conditions, shell material content and reaction time were investigated to obtain the optimized microcapsules. The as-prepared products under the optimal conditions showed high quality, their surface was smooth and dense, and free of any adhesion. The experimental characterization showed that in the microcapsules over 75%(ω) paraffin liquid was well encapsulated by MF resin, of which the thickness was in the range of no less than 50~100 nm. The microcapsule size was within the range of 1~5 μm and most intense distribution at 3.32 μm. DSC measurements gave two endothermic peaks with the initial phase change temperatures of 4.4 and 28.6℃ respectively, and the total enthalpy was 14.9 J/g which is comparable to the latent heat of commercial liquid paraffin. The microcapsules keep stable up to a high temperature 215℃ or a pressure of 1.0 MPa, as well as excellent thermal resistance against long-term thermal aging and thermal cycle near 300 times.
%K phase change material
%K microcapsule
%K liquid paraffin
%K melamine-formaldehyde resin
%K in situ polymerization<br>相变材料
%K 微胶囊
%K 液体石蜡
%K 密胺树脂
%K 原位聚合
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=3FCF8B1A330466D5&jid=B9EE12934D19905403D996AE65CEEEED&aid=B39D47F72CB13A76282C62115ECDBFFD&yid=99E9153A83D4CB11&vid=59906B3B2830C2C5&iid=0B39A22176CE99FB&sid=2AC7DCCBBC26ECF8&eid=DFEE4E8C33C95CEF&journal_id=1009-606X&journal_name=过程工程学报&referenced_num=0&reference_num=0