纳米纤维素改性阳离子聚丙烯酰胺乳液及其絮凝性能研究

Study on Cationic Polyacrylamide Emulsion Modified by Nanocellulose and Its Flocculation Performance

关键词:  纳米纤维素  阳离子聚丙烯酰胺乳液  功能化改性  絮凝性能

Key Words:nanocellulose  cationic polyacrylamide emulsion  functional modification  flocculation performance

摘要:为提升阳离子乳液聚合物絮凝性能，采用纳米纤维素对阳离子聚丙烯酰胺乳液功能化改性，并深入探究了纳米纤维素功能改性对阳离子聚丙烯酰胺乳液性能的影响。采用扫描电子显微镜、激光粒度仪、傅里叶变换红外光谱仪、核磁共振光谱仪和差热-热重分析仪对纳米纤维素改性阳离子聚丙烯酰胺乳液结构进行了全面的表征；并对制备的功能型絮凝剂进行造纸废水和含油污水絮凝性能分析。结果表明，当纳米纤维素用量为2%、改性阳离子聚丙烯酰胺乳液用量为26 mg/L时，造纸废水COD_Cr去除率达92%~93%，固体悬浮物SS去除率达90%~91%；当改性阳离子聚丙烯酰胺乳液用量为4 mg/L时，海上油田含油污水脱油率为96.8%。

Abstract:To enhance the flocculation performance of cationic emulsion polymers， functional modification of cationic polyacrylamide emulsions with nanocellulose was conducted. The effects of this nanocellulose-based functional modification on the properties of the cationic polyacrylamide emulsions were investigated. Initially， the structure of the nanocellulose-modified cationic polyacrylamide emulsions was characterized by scanning electron microscopy （SEM）， laser particle size analyzers， fourier transform infrared spectroscopy （FT-IR）， nuclear magnetic resonance （NMR） spectroscopy， and differential thermal-thermogravimetric analysis （TG）. Subsequently， the flocculation performance of the prepared functional flocculants was evaluated using paper mill wastewater and oily wastewater The results indicated that when the nanocellulose content was 2%， and the dosage of the modified cationic polyacrylamide emulsion was 26 mg/L， the removal rates of chemical oxygen demand （COD_Cr） and solids suspended （SS） in paper mill wastewater reached 92%~93% and 90%~91%， respectively. Furthermore， with a dosage of 4 mg/L of the modified cationic polyacrylamide emulsion， the oil removal rate from oily wastewater sourced from offshore oilfields was 96.8%.