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pH-responsive viscoelastic supramolecular viscosifiers based on dynamic complexation of zwitterionic octadecylamidopropyl betaine and triamine for hydraulic fracturing applications† by Liu, Shuhao (author);Lin, Yu-Ting (author);Bhat, Bhargavi (author);Kuan, Kai-Yuan (author);Kwon, Joseph Sang-II (author);Akbulut, Mustafa (author) is a Materials Science article available to read on EtoBox.

What is pH-responsive viscoelastic supramolecular viscosifiers based on dynamic complexation of zwitterionic octadecylamidopropyl betaine and triamine for hydraulic fracturing applications† about?

Viscosity modifying agents are one of the most critical components of hydraulic fracturing fluids, ensuring the efficient transport and deposition of proppant into fissures. To improve the productivity index of hydraulic fracturing processes, better viscosifiers with a higher proppant carrying capacity and a lower potential of formation damage are needed. In this work, we report the development of a novel viscoelastic system relying on the complexation of zwitterionic octadecylamidopropyl betaine (OAPB) and diethylenetriamine (DTA) in water. At a concentration of 2 wt%, the zwitterionic complex fluid had a static viscosity of 9 to 200 poise, which could be reversibly adjusted by changing the suspension pH. The degree of pH-responsiveness ranged from 10 to 27 depending on the shear rate. At a given concentration and optimum pH value, the zwitterionic viscosifiers showed a two-orders-of-magnitude reduction in settling velocity of proppant compared to polyacrylamide solution (slickwater). By adjusting the pH between 4 and 8, the networked structure of the gel could be fully assembled and disassembled. The lack of macromolecular residues at the dissembled state can be beneficial for hy

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Author

Liu, Shuhao (author);Lin, Yu-Ting (author);Bhat, Bhargavi (author);Kuan, Kai-Yuan (author);Kwon, Joseph Sang-II (author);Akbulut, Mustafa (author)

Publisher

Royal Society of Chemistry (RSC)

Published

2021

Language

EN

Field

Materials Science (Physical Sciences)