β-CD交联聚合物的制备及处理苯酚废水

Preparation of β-cyclodextrin crosslinked polymer and treatment of phenol wastewate

摘要:

以β-环糊精(β-CD)和二苯基甲烷二异氰酸酯（MDI）为原料，通过聚加成反应制得β-CD-MDI交联聚合物。采用红外光谱（IR）、扫描电镜（SEM）、元素分析对交联产物进行表征。探讨了交联聚合物的加入量、苯酚溶液初始浓度对苯酚去除率的影响。结果表明，β-CD-MDI保留了β-CD的空腔结构，表面形貌由层状变为层状交联，分子式为(C42H70O35)。β-CD-MDI用量40 mg/L，温度30 ℃，机械搅拌150 r/min，pH为5-7，时间40 min，对苯酚去除率为98.5%，重复使用6次后对苯酚去除率仍有97%。

Abstract:

Cyclodextrin polymers were synthesized by polyaddition cross-linking reaction of cyclodextrin and diphenyl methane diisocyanate.Infrared spectroscopy(IR), Scanning electron microscopy(SEM), Elemental analyzer(EA) techniques were used to characterize the cross-linked polymers. The factors affecting the adoption capacity of the cross-linked polymer on phenol were investigated, the dosage of cross-linked polymer and initial phenol concentration.The results indicate that the cross-linked polymers retained the structure of β-cyclodextrin cavity, surface morphology changed from layer to layered crosslinking and molecular formula was (C42H70O35)7.45. Under the condition of wastewater pH 5-7,temperature30 ℃, mechanical stirring 150 r/min,the removal rate of the phenol was up to 98.5% at using amount of 40mg /mL in 40 min contact time, The removal rate of the phenol is still up to 97%, after 6 times repeated usage.