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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)。
Author NameAffiliationPostcode
YANG Kaiji* CNOOC (Tianjin) Oilfield Chemical Co. Ltd.Tianjin 300452 300452
ZHANG Ying CNOOC (Tianjin) Oilfield Chemical Co. Ltd.Tianjin 300452 300452
CHENG Yan CNOOC (Tianjin) Oilfield Chemical Co. Ltd.Tianjin 300452 300452
WEI Qiang CNOOC (Tianjin) Oilfield Chemical Co. Ltd.Tianjin 300452 300452
WANG Yongjun CNOOC (Tianjin) Oilfield Chemical Co. Ltd.Tianjin 300452 300452
GUO Xiaoyi CNOOC (Tianjin) Oilfield Chemical Co. Ltd.Tianjin 300452 300452
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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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