氨基系微胶囊包覆相变材料的研究进展  

Research Progress of Micro- encapsulated PCM With Amino

作　　者：金晓明[1] 刘素燕[2] 薛平[1] 孙国林[2] 

机构地区：[1]北京化工大学塑料工程研究所,北京100029 [2]北京巨龙博方科学技术研究院,北京100031

出　　处：《当代化工》2010年第1期66-70,共5页Contemporary Chemical Industry

基　　金：国家"十一五"科技支撑项目;项目编号:2006BAJ02A09-04

摘　　要：采用原位聚合法,对影响以脲醛树脂(UF)和三聚氰胺-甲醛树脂(MF)为囊壁的微胶囊相变材料性能的因素,得出以UF为囊壁时,宜采用反应温度为70℃,尿素和甲醛摩尔比为1︰2,控制预聚阶段pH为8～9,酸化固化阶段pH为1.5～2;以MF为囊壁时,宜采用反应温度为70℃,三聚氰胺和甲醛摩尔比为1︰(2.4～2.5),控制预聚阶段pH为8～9,酸化固化阶段pH为3;然后选择氯化铵为pH调节剂并采用二次或三次调节,选择合适的乳化分散剂和乳化分散时间,可以获得优异的微胶囊性能。最后展望了氨基系囊壁的发展,并提出了目前面临的困难及急需解决的问题。The factors which would influence the performance of micro-encapsulated PCM,whose shell was made of urea-formaldehyde resin （UF） or melamine - formaldehyde resin （MF） ,were discussed. The factors such as micro-encapsulated PCM＇ shell materials＇ ratio,reaction temperature,reaction pH value,dispersant and emulsifier, modification, etc. were summarized. The results show that when shell materials for microcapsules is urea-formaldehyde （UF）,desirable reaction temperature is at 70℃ ,molar ratio of urea to formaldehyde is 1 ： 2,pH during pre-polymerization is in the range of 8 - 9, pH of acid curing phase is in the range of 1.5 -2; when MF is used as the shell materials, reaction temperature is at 70 ℃, molar ratio of melamine to formaldehyde is 1 ： （2.4 - 2.5 ）,pH during pre-polymerization is in the range of 8 - 9,but pH of acid curing phase is 3;and then the pH of this solution is titrated by two or three times with the ammonium chloride; choosing suitable emulsifying agent and emulsifying time is very important to get excellent performance of the micro-capsules. At last, development trend of the micro-encapsulated PCM with amino was prospected, current difficulties and the urgent problems to solve were put forward.

关 键 词：脲醛树脂 三聚氰胺-甲醛树脂 微胶囊 相变材料 

分 类 号：TE09[石油与天然气工程]