CNTs/Fe₃O₄磁性破乳剂的制备及性能研究

Preparation and Performance of CNTs/Fe₃O₄Magnetic Demulsifier

贾新磊 李哲 常小妮 许兰娟 耿孝恒 郭海莹 魏立新

JIA Xinlei LI Zhe CHANG Xiaoni XU Lanjuan GENG Xiaoheng GUO Haiying WEI Lixin

为了实现破乳剂的绿色环保可回收，选择将功能化后的碳纳米管（CNTs）和四氧化三铁（Fe3O4）进行复合，通过溶剂热法制备磁性破乳剂CNTs/Fe3O4，并用XRD、FT-IR 及SEM对破乳剂的结构进行了表征，研究了CNTs/Fe3O4磁性破乳剂对水包油型乳液的破乳性能，并探究其达到最佳破乳性能的条件及回收性能。研究结果表明：通过溶剂热法将Fe3O4和CNTs 成功复合在一起，制备的磁性破乳剂CNTs/Fe3O4分散性明显增强。当破乳温度为65 ℃、破乳剂加量为600 mg/L、破乳时间为90 min、pH值为6 时的破乳效果最佳，处理后含油废水的透光率可高达96.03%，水中含油量为0.017 g/L。CNTs/Fe3O4在循环利用4次时的破乳效果显著，透光率仍然可达91.43%。

In order to realize the environmental protection and recyclability of the demulsifier，functionalized carbon nanotubes （CNTs）and Fe3O4 were composited and the CNTs/Fe3O4 magnetic demulsifier was prepared by solvothermal method，and the demulsifier was characterized by XRD，FT-IR and SEM. The demulsification performance of the CNTs/Fe3O4 magnetic demulsifier was studied，and the conditions for achieving the best demulsification performance and the recovery performance were explored. The results showed that the dispersibility of the prepared magnetic demulsifier CNTs/Fe3O4 was significantly enhanced by successfully compounding Fe3O4 and CNTs together through the solvothermal method. The best demulsification effect was achieved when the demulsification temperature was 65 ℃，the concentration of demulsifier was 600 mg/L，the demulsification time was 90 min and the pH value was 6. The light transmittance of the treated oily wastewater was up to 96.03% and the oil content of the wastewater was 0.017 g/L. CNTs/Fe3O4 still had a significant demulsification effect recycling four times and the light transmittance was still up to 91.43%.

10.19346/j.cnki.1000-4092.2022.02.029