Tannic Acid-Modified Poly (acrylamide-co-acrylic acid): A Versatile Approach for Aqueous Viscosity Modulation
Date
2024-04-06Author
Meleán Brito, Ramses S.
Milanesio, Juan
Oviedo, María Belén
Padró, Juan M.
Strumia, Miriam C.
Mattea, Facundo
ORCID
https://orcid.org/0000-0001-9908-5806https://orcid.org/0000-0002-3200-9929
https://orcid.org/0000-0001-5529-3291
https://orcid.org/0000-0002-5475-5201
https://orcid.org/0000-0002-8205-9641
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This study focuses on the synthesis of a polymer through the grafting of tannic acid onto poly (acrylamide-co-acrylic acid). The main goal is to generate polymers with lateral branched structures with the versatile bonding abilities associated with tannic acid and then study their ability to modify the viscosity of aqueous solutions for potential application in enhanced oil recovery. The synthesized macromolecules were characterized using Fourier transform infrared spectroscopy, 1H-nuclear magnetic resonance spectroscopy, ultraviolet–visible spectroscopy, size exclusion chromatography coupled with multi-angle light scattering and differential refractive index detection, as well as fluorescence spectroscopy. These techniques were employed to confirm and quantify the incorporation of tannic acid. The results showed that adding 0.4, 4.0, and 10.0% w/w tannic acid in the reaction mixture produced polymers with incorporations of the branched monomer ranging from 0.06 to 6.92% w/w. The rheological properties of aqueous solutions of the obtained polymers indicated changes in the intra- and intermolecular interactions that were also interpreted by density functional theory simulations. Results showed that the viscosity of the solutions was at least 4.4 times higher than that of the original poly (acrylamide-co-acrylic acid) in water.
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Ramses S. Meleán Brito, Juan Milanesio, María Belén Oviedo, Juan M. Padró, Miriam C. Strumia, and Facundo Mattea. Tannic Acid-Modified Poly (acrylamide-co-acrylic acid): A Versatile Approach for Aqueous Viscosity Modulation. ACS Applied Polymer Materials 2024 6 (8), 4462-4474 DOI: 10.1021/acsapm.3c03056
Other links
https://pubs.acs.org/doi/abs/10.1021/acsapm.3c03056https://pubs.acs.org/doi/suppl/10.1021/acsapm.3c03056/suppl_file/ap3c03056_si_001.pdf
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