Fe_3O_4聚脲微胶囊的制备及性能  

Preparation and properties of Fe_3O_4 polyurea microcapsules

作　　者：邓磊[1] 林休休[1] 刘小红[1] 徐冬梅[1] 张可达[1] 

机构地区：[1]江苏省有机合成重点实验室苏州大学化学化工学院,江苏苏州215123

出　　处：《苏州大学学报（自然科学版）》2007年第3期70-74,共5页Journal of Soochow University(Natural Science Edition)

基　　金：苏州大学在职博士学位人员经费资助(R2317224)

摘　　要：用甲苯2,4（2,6）-二异氰酸酯（TDI）为壁材原料,Fe3O4作为芯材,由原位聚合法制得了Fe3O4聚脲微胶囊.通过红外光谱分析和亲水性的比较,证明了Fe3O4已被聚脲包覆.用热分析方法测定了微胶囊内Fe3O4的质量百分比为5.0%、10.2%、15.2%.扫描电镜观察说明,当原料质量比m（Fe3O4）∶m（TDI）=（0.2~0.4）∶2时,微胶囊的分散性好于Fe3O4,此时,微胶囊磁性与Fe3O4相似.微胶囊化的Fe3O4密度为（1.01~1.45）g/cm3,小于原Fe3O4的密度（3.12 g/cm3）.Fe3O4聚脲微胶囊能分散于丙烯酸异辛酯、丙二醇二丙烯酸酯、丙烯酸丁酯、二乙烯三胺、甲苯、乙醇、乙醇水溶液[w（C2H5OH）=30%]、二缩三乙二醇等有机溶剂中,且能稳定存在180 d以上,有望用于涂料、油墨、粘合剂等领域.A series of Fe3O4 polyurea microcapsules were prepared by in situ polymerization with 2,4（2,6）-toluene diisocyanate（TDI） as wall materials and Fe3O4 as a core material.FI-IR analysis and comparison of hydrophilicity between Fe3O4 and Fe3O4 polyurea microcapsules showed that Fe3O4 has already been encapsulated by polyurea.The content of Fe3O4 enveloped in polyurea was 5.0%、10.2%、15.2% according to thermogravimetric analysis.Scan electron microscope（SEM） images showed that,when the mass ratio of Fe3O4 to TDI was between（0.2～0.4） to 2（m/m）,the dispersion of Fe3O4 polyurea microcapsules was better than that of Fe3O4 long.In this case,the microcapsules maintained similar magnetism to Fe3O4.The density of Fe3O4_polyurea microcapsules was（1.01～1.45） g/cm3,less than that of original Fe3O4（3.12 g/cm3）.Fe3O4_polyurea microcapsules could be well dispersed in organic solvents,such as isooctyl acrylate,dipropyleneglycol diacrylate,n-butyl acrylate,diethylenetriamine,toluene,ethanol,ethanol aqueous [w（C2H5OH）=30%],triethylene-glycol,in which the microcapsules were stable for more than 180 d.The Fe3O4 polyurea microcapsules have potentaial applications in coatings and paintings,inks and adhesives.

关 键 词：微胶囊 四氧化三铁 聚脲 涂料 油墨 粘合剂 

分 类 号：O633.4[理学—高分子化学]