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。
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.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2011年第9期1900-1905,共6页
Chemical Industry and Engineering Progress
基金
南京工业大学与上海宝钢化工有限公司合作开发项目(K10SHAM280)
