Thickening mechanism of water-soluble polymer in the presence of Ca2+ and Na+

Hydrophobic-associated polymer is widely used as thickener in the presence of Ca 2+ or Na + . Three polymers including partially hydrolyzed polyacrylamide (HPAM) and hydrophobically associating polymers (CHAP and CBHAP) were used to clarify the thickening mechanism. The fractal aggregation process,...

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Bibliographic Details
Published in:Polymer bulletin (Berlin, Germany) Germany), 2022-09, Vol.79 (9), p.7909-7921
Main Authors: Jiang, Feng, Wang, Huan, Ye, Zhuangjie, Pang, Shishi, Pu, Wanfen, Xu, Bin
Format: Article
Language:English
Subjects:
Associations
Calcium ions
Chains (polymeric)
Characterization and Evaluation of Materials
Chelation
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Dehydration
Electrostatic shielding
Enhanced oil recovery
Hydrophobicity
Metal ions
Organic Chemistry
Original Paper
Physical Chemistry
Polyacrylamide
Polymer Sciences
Polymers
R&D
Research & development
Saline water
Salinity
Salt
Scanning electron microscopy
Sodium
Soft and Granular Matter
Thickening
Viscosity
Water soluble polymers
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Summary:Hydrophobic-associated polymer is widely used as thickener in the presence of Ca 2+ or Na + . Three polymers including partially hydrolyzed polyacrylamide (HPAM) and hydrophobically associating polymers (CHAP and CBHAP) were used to clarify the thickening mechanism. The fractal aggregation process, microstructure and the interaction between polymers and metal ions were investigated by using laser light scattering, scanning electron microscope and ion meter. The experimental results show that dehydration and electrostatic shielding cause the reduction of viscosity in the presence of Ca 2+ and Na + . The amounts of flocculates and the high chelating concentration demonstrate the strong interaction between polymer chains and metal ions. By improving the hydrophobicity of both polymer main chains and side chains, the interaction is weakened, as a result, complete and independent special network and low chelating concentration of CBHAP are found, respectively. The results may provide a good strategy for the design of salt-resistant polymers.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-021-03886-5