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250507s2025 xx |||||o 00| ||eng c |
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|a 10.1021/acs.langmuir.4c04135
|2 doi
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|a eng
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|a Qi, Jie
|e verfasserin
|4 aut
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|a Intensifying Stabilization and Dissolution Capacity of Polyacrylamide Emulsion Drag Reducers Using a pH-Switchable Four-Tailed Ionic Liquid Surfactant
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|c 2025
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|a Text
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|a ƒaComputermedien
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|a Date Revised 28.01.2025
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a To balance the stability and dissolution of polyacrylamide (PAM), emulsion drag reducers dominate the successful operation of volumetric fracturing. Herein, a pH-switchable four-tailed ionic liquid surfactant (OA/Cyclen) is synthesized by oleic acid (OA) and 1,4,7,10-tetraazacyclododecane (Cyclen). The four-tailed structure of OA/Cyclen enhances the stability of the emulsion polymerization reactor and supplies enough switchable sites for triggering the intensified release of the PAM emulsion. The surface activity of OA/Cyclen varied under different pH conditions due to the interionic proton transfer between OA and Cyclen. The OA/Cyclen-stabilized monomer emulsion thus posed controllable stability. A pH-switchable PAM emulsion is produced through polymerization of this monomer emulsion, which shows a storage stability for 60 days at a pH value of 7.5. It is completely released to the aqueous solution within 20 s at a pH value of 12.03, achieving a maximum viscosity of 63 mPa·s at a polymer concentration of 0.5 wt % and a drag reduction of 61.2% at a polymer concentration of 0.05 wt %. The construction of OA/Cyclen is expected to supply an alternative for the development of drag reducer products
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|a Journal Article
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1 |
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|a Qing, Miaomiao
|e verfasserin
|4 aut
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1 |
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|a Yang, Yang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Siwei
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhang, Yong
|e verfasserin
|4 aut
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|a Wang, Na
|e verfasserin
|4 aut
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|a Lu, Hongsheng
|e verfasserin
|4 aut
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| 700 |
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|a Zhang, Zheng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1985
|g 41(2025), 3 vom: 28. Jan., Seite 1765-1772
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnas
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|g volume:41
|g year:2025
|g number:3
|g day:28
|g month:01
|g pages:1765-1772
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|u http://dx.doi.org/10.1021/acs.langmuir.4c04135
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