尿素-三聚氰胺-甲醛树脂相变微胶囊的制备及性能  

Preparation and Properties of Urea- Melamine- Formaldehyde Phase Change Microcapsules

作　　者：徐超星[1,2] 杨文彬[1,2] 杨序平[1,2] 刘菁伟 范敬辉[3] 邢涛[3] 张凯[3] 

机构地区：[1]西南科技大学四川省非金属复合与功能材料省部共建国家重点实验室培育基地,四川绵阳621010 [2]西南科技大学教育部生物质材料工程研究中心,四川绵阳621010 [3]中国工程物理研究院总体工程研究所,四川绵阳621900

出　　处：《西南科技大学学报》2015年第1期22-25,共4页Journal of Southwest University of Science and Technology

基　　金：国家自然科学基金委员会-中国工程物理研究院联合基金(11176025);四川省教育厅重大培育项目(14CZ0011);四川省科技创新苗子工程重大项目(2014-14);西南科技大学研究生创新基金(14ycx021)

摘　　要：以尿素-三聚氰胺-甲醛树脂(UMF)为壁材,石蜡为芯材,通过原位聚合法制备了相变微胶囊,并探讨了尿素含量对相变微胶囊性能的影响。通过傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)、差示扫描量热分析(DSC)、热重分析(TG)及渗漏率对相变微胶囊进行表征。结果表明,与三聚氰胺-甲醛树脂(MF)相变微胶囊相比,UMF相变微胶囊的表面更光滑,破损率更低,热稳定性能更高。当尿素与三聚氰胺质量比为10%时,相变微胶囊的渗漏率最低。Phase change microcapsules with urea- melamine -formaldehyde as shell and paraffin as core were synthesized by in situ polymerization. Microeapsules were investigated by Fourier transform infrared spectrophotometer (FT -IR), scanning electron microscope (SEM), different scanning calorimetry (DSC), thermogravimetric analysis (TG) and leakage rate. The results indicate that microcapsules com- posed of urea- melamine- formaldehyde (UMF) are more flexible and smoother than those composed of melamine - formaldehyde (MF). The thermal stability of microcapsules could be improved by using differ- ent mole ratios of urea - melamine - formaldehyde copolymers as shells. The lowest leakage rate of micro- capsules is 13% when the urea/melamine ratio is 10%.

关 键 词：尿素-三聚氰胺-甲醛树脂 相变微胶囊 热稳定性 渗透率 

分 类 号：TQ326.51[化学工程—合成树脂塑料工业]