Study on Cationic Polyacrylamide Emulsion Modified by Nanocellulose and Its Flocculation Performance
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 polyacryl-amide 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 reso-nance(NMR)spectroscopy,and differential thermal-thermogravimetric analysis(TG).Subsequently,the flocculation performance of the pre-pared 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(CODCr)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％.
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