纳米TiO2/聚氨酯复合材料的制备及性能研究  

Study on preparation and property of nano TiO2/PUR composite

作　　者：王升文[1] Wang Shengwen(The Department of Chemical Engineering of Yangzhou Polytechnic Institute,Yangzhou 225127)

机构地区：[1]扬州工业职业技术学院化工学院,扬州225127

出　　处：《化工新型材料》2020年第12期65-67,72,共4页New Chemical Materials

基　　金：2020年结构化学国家重点实验室基金课题(20200027);2019年江苏省住建厅科技项目(2019ZD097);2019年江苏高校“青蓝工程”优秀教学团队(苏教师[2019]3号)。

摘　　要：将自制改性纳米TiO2在催化剂作用下与二苯基甲烷二异氰酸酯、聚醚二醇、二羟甲基丙酸和一缩二乙二醇反应,通过傅里叶变换红外光谱仪、扫描电子显微镜以及透射电子显微镜对产物进行分析,证实纳米TiO2成功接枝到聚氨酯分子链上,形成稳定的纳米TiO2/聚氨酯复合乳液。研究表明,随着纳米TiO2含量增加,纳米TiO2/聚氨酯复合涂膜的热稳定性能和耐水性能增强,其铅笔硬度和抗冲击强度增大,玻璃化转变温度上升,当纳米TiO2质量分数为0.8%时,复合涂膜的综合性能最优。The home-made modified nano TiO2 reacted with diphenylmethane diisocyanate,polyether glycol,dihydroxymethylpropanoic acid and diethylene glycol under the action of a catalyst.The resulted product was analyzed by infrared spectroscopy(FT-IR),scanning electron microscope(SEM)and transmission electron microscope(TEM).It was confirmed that the nano TiO2 was successfully grafted onto the PUR molecular chain to form a stable modified nano TiO2/PUR composite emulsion.The results shown that with the increase of the content of nano TiO2,the thermal stability and water resistance of the composite coating,the hardness and shock resistance of the coating pencil,and the Tg(glass-transition temperature)increased.When the content of TiO2 was 0.8%,the composite properties of the coating were optimal.

关 键 词：纳米二氧化钛 聚氨酯 复合材料 综合性能 表征 

分 类 号：O632[理学—高分子化学]