Page 59 - 《精细化工》2019年第11期

第 36 卷第 11 期 精 细 化 工 Vol.36, No.11
2019 年 11 月 FINE CHEMICALS Nov. 2019

功能材料
癸酸相变微胶囊的制备及热性能

王信刚，陈忠发，徐 伟，尹 皓

（南昌大学 建筑工程学院，江西 南昌 330031）

摘要：以尿素、甲醛及癸酸为原料，利用原位聚合法制备了脲醛树脂包覆癸酸的相变微胶囊。以芯壁质量比、
乳化剂用量、乳化转速及固化剂含量为变量设计正交实验，采用 ESEM、FTIR 和 DSC 分别表征癸酸微胶囊的
微观形貌、化学结构及热性能，利用渗漏率实验测试癸酸微胶囊的防渗性能。结果表明，m(OP-10)∶
m(Span-80)=4∶1 的复合乳化剂有利于改善癸酸微胶囊颗粒特性。癸酸微胶囊 P（芯壁质量比 3∶2、乳化剂用量
占芯材质量 5%、乳化转速 1400 r/min、固化剂间苯二酚用量占尿素质量 12%）在微观形貌上分散良好且大小均
一，相变潜热为 123.91 J/g，渗漏率和包覆率分别为 6.95%和 69.7%，与癸酸微胶囊 S（芯壁质量比 1∶1、乳化
剂用量占芯材质量 6%、乳化转速 1100 r/min、固化剂用量占尿素质量 10%）相比，癸酸微胶囊 P 的渗漏率降低
了 57.2%，包覆率反而提高了 132.3%，具有良好的热性能。
关键词：相变材料；微胶囊；癸酸；防渗性能；热性能；功能材料
中图分类号：TB34 文献标识码：A 文章编号：1003-5214 (2019) 11-2207-06

Preparation and Thermal Properties of Capric

Acid Phase Change Microcapsules

WANG Xin-gang, CHEN Zhong-fa, XU Wei, YIN Hao
（School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, Jiangxi, China）

Abstract: Phase change microcapsules of capric acid coated with urea-formaldehyde resin were prepared
by in-situ polymerization using urea, formaldehyde and capric acid as raw materials. The factors affecting
the coating rate of microcapsules such as core-wall mass ratio, emulsifier dosage, emulsifying speed and
curing agent content were investigated by orthogonal experiment. The morphology, chemical structure and
thermal storage properties of capric acid microcapsules were characterized by ESEM, FTIR and DSC. The
anti-seepage property of capric acid microcapsules were tested by leak rate test. The results showed that the
composite emulsifier of OP-10 and Span-80 with a mass ratio of 4∶1 could improve the particle
characteristics of capric acid microcapsules. When the core-wall mass ratio was 3∶2, the amount of
emulsifier dosage accounted for 5% of the core material mass, the emulsifying speed was 1400 r/min, and
the curing agent dosage accounted for 12% of urine mass, the prepared capric acid microcapsules P
exhibited good dispersion and uniform size. Its latent heat of phase transformation was 123.91 J/g, its
leakage rate and coating rate were 6.95% and 69.7%, respectively. Compared with those of the capric acid
microcapsules S (core-wall mass ratio 3∶2, emulsifier dosage accounting for 5% of core material mass,
emulsifying speed 1400 r/min, curing agent dosage accounting for 12% of urine mass), the leakage rate of
capric acid microcapsules P decreased by 57.2%, while the coating rate increased by 132.3%. Capric acid
microcapsules P possessed good thermal properties.
Key words: phase change materials; microcapsules; capric acid; anti-seepage performance; thermal property;
functional materials

收稿日期：2019-03-12; 定用日期：2019-04-28; DOI: 10.13550/j.jxhg.20190188
基金项目：国家自然科学基金（51972158T 和 51562024）；江西省杰出青年人才（20162BCB23014）；南昌大学创新项目（CX2018062）
作者简介：王信刚（1977—），男，教授，博士生导师，E-mail：wxglab@126.com。