Abstract:

Crosslinked β-cyclodextrin（β-CyD）polymers with diisocyanate was prepared under ultrasonic irradiation. The key parameters and optimum synthesis conditions were optimized by orthogonal experiment and evaluated with yield ratio. The ratio of β-CyD∶diisocyanate was 1∶9（mol/mol），hexamethylene diisocyanate（HDI）was chosen as crosslinking agent，the ratio of dibutyltin dilaurate∶triethylene diamine was 1∶1.5（wt/wt），reaction temperature was 60 ℃，reaction time was 7 h. FTIR，SEM and TGA were used for the characterization of crosslinked polymers. The results suggested that β-CyD polymers retained cavity structure，crosslinked interactions of β-CyD and diisocyanate formed carbamate groups and the network surface features. Reaction temperature was lowered and reaction time was shortened under ultrasonic irradiation. The crosslinked polymers had micro-sphere surface topography and multi-hole cavity structure.

摘要：

二异氰酸酯在超声条件下对β-环糊精（β-CD）进行改性，制得改性环糊精的交联聚合物。用正交试验法，以交联聚合物产率为评价指标，筛选二异氰酸酯改性环糊精主要影响因素和最佳合成工艺条件：n(异氰酸酯)∶n(β-CD) 的摩尔比约为1∶9；二异氰酸酯选用六亚甲基而异氰酸酯（HDI），超声声强0.1 W/cm²，反应温度60℃，反应时间7 h。用红外光谱（IR）、扫描电镜（SEM）、热重分析（TG）等检测方法对交联产物进行表征。结果表明：改性后的β-CD保留了其原有的空腔结构，环糊精与二异氰酸酯反应生成了氨基甲酸酯基键，交联后的聚合物形成了具有网络的形貌；超声条件下合成环糊精聚合物可以降低反应温度、缩短反应时间，交联聚合物形成了微球状表面和多孔的空腔结构。