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Study on Cationic Polyacrylamide Emulsion Modified by Nanocellulose and Its Flocculation Performance |
Received:June 02, 2024 |
DOI:10.11980/j.issn.0254-508X.2024.12.008 |
Key Words:nanocellulose cationic polyacrylamide emulsion functional modification flocculation performance |
Fund Project:海油发展重大专项“纳米纤维素基聚合物油水分离机理研究”(E-J23A007)和“高分子量阳离子乳液聚合物清水剂的开发与应用”(E-J22A008)。 |
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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 (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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