掺杂纳米-TiO_2改性相变微胶囊壁的性能研究  

Preparation and properties of phase change microcapsule wall modified by doped nano-TiO_2

作　　者：蔡明建[1] 王秀阁 CAI Ming-jian;WANG Xiu-ge;Department of Chemistry;Tangshan Normal University;

机构地区：[1]唐山师范学院化学系,河北唐山063000

出　　处：《现代化工》2018年第6期106-109,111,共5页Modern Chemical Industry

基　　金：河北省教育厅项目(ZC2016083)

摘　　要：以掺杂金属Fe^(3+)、Zr^(4+)、Ce^(4+)的TiO_2纳米粒子及TiO_2纳米粒子填充聚乙烯醇(PVA)改性密胺甲醛树脂为微胶囊复合壁材,以十四烷为芯材,采用原位聚合法制备了掺杂TiO_2纳米粒子填充PVA改性囊壁的相变微胶囊。考察了掺杂TiO_2纳米粒子对微胶囊机械性能、热性能及表面形态的影响,采用FT-IR、TG和SEM等方法对其进行了表征。结果表明,当囊壁中均匀地掺杂纳米TiO_2后,微胶囊的机械强度增大,芯材释放率减小。当壁材中Fe^(3+)掺杂纳米TiO_2质量分数为0.5%时,微胶囊破损率为18.5%,芯材10 d释放率为22.6%。Phase change microcapsules are prepared by in-situ polymerization,using melamine formaldehyde resin modified by polyvinyl alcohol filled with Fe^（3＋）,Zr^（4＋）or Ce^（4＋）-doped nano-TiO2 particles as the wall,and phase change material n-tetradecane as the core.Effects of the doped nano-TiO2 particles on the mechanical property,thermal property and surface morphology of microcapsules are studied by FT-IR,TG and SEM. The results show that the mechanical strength of microcapsules will increase and the release rate of core material will decrease when the doped nano-TiO2 particles are dispersed evenly in the wall material of microcapsules.The cracking ratio of microcapsules is 18. 5% and the release rate of core material is 22. 6% in ten days when the mass fraction of Fe^（3＋）-doped nano-TiO2 in wall material of microcapsules is 0. 5%.

关 键 词：掺杂纳米TIO2 三聚氰胺-甲醛树脂 十四烷 微胶囊 

分 类 号：TQ326[化学工程—合成树脂塑料工业]