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采用亚结构拼接法将2,3,4-三氟苯异氰酸酯定位导入到壳聚糖上,制得了多氟苯脲基壳聚糖纳米材料;纳米材料的结构经红外光谱仪、元素分析仪、透射电镜、热重分析仪等进行了表征。结果表明:反应发生在壳聚糖的氨基上;纳米片直径和厚度分别集中在50~200nm和15~30nm;纳米材料的热稳定性比壳聚糖的明显提高,分别在310℃和540℃出现2次热降解温度。
The sub-structure splicing method was used to position 2,3,4-trifluorophenyIisocyanate into chitosan. The polyfluoroureido chitosan nanomaterials were prepared. The structure of the nanomaterials was characterized by infrared spectroscopy, elemental analyzer, transmission Electron microscopy, thermogravimetric analyzer were characterized. The results showed that the reaction occurred on the amino group of chitosan. The diameter and thickness of nanosheets were concentrated at 50 ~ 200nm and 15 ~ 30nm, respectively. The thermal stability of nanomaterials was significantly higher than that of chitosan at 310 ℃ and 540 ℃ 2 times the thermal degradation temperature.