多氟苯脲基壳聚糖纳米材料的制备及表征

Preparation and characterization of polyfluorophenylurea chitosan nanomaterial

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。

Polyfluorophenylurea chitosan nanomaterial was obtained by 2,3,4-trifluorop-henyl isocyanate positioning introducted into chitosan by the substructure splicing method;The nanomaterial was characterized by FTIR,Elemental analysis,TEM and TG.The result-s showed that the reaction was on the amino groups of chitosan.The nanomaterial was flaky,and its diameter was mainly concentrated from 50to 200nm and its thickness was mainly concentrated from 15to30nm.The thermostability of the nanomaterial was promoted while the two temperatures of degradation were at 310℃and 540℃.