采用共熔融方法制备氯化胆碱-尿素离子液体,并用红外光谱法对其结构进行了表征.采用超声波分散法和紫外-可见分光光度法对碳纳米管在该离子液体中的分散性进行了研究.结果表明,采用共熔融方法成功制备了氯化胆碱-尿素离子液体.随着超声时间、温度和功率的逐渐增加,碳纳米管在氯化胆碱-尿素离子液体中的平均粒径大致呈逐渐降低的趋势,适宜的超声时间为2～3 h,超声功率为300～350 W.吸光度测试表明碳纳米管在氯化胆碱-尿素离子液体中具有良好的分散稳定性.%Choline chloride-urea ionic liquids were prepared by co-melting method and the structure of the eutectic solvent was characterized by infrared spectroscopy. The dispersion of carbon nanotubes in the ionic liquids was studied by ultrasonic dispersion and UV-visible spectrophotometry. The results showed that choline chloride-urea ionic liquids were successfully prepared by co-melting method. With the increase of ultrasonic time, temperature and power, the average particle size of carbon nanotubes in the ionic liquids decreased gradually. The appropriate ultrasonic time was 2-3 h and the ultrasonic power was 300-350 W. The absorbance test showed that the carbon nanotubes had good dispersion stability in the ionic liquids.
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