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Polyacrylamide copolymer/aminated carbon nanotube‐based aqueous nanofluids for application in high temperature and salinity
Author(s) -
Lima Meiriane Cristina Faria Soares,
Amparo Sthéfany Zaida Silva do,
Siqueira Eder José,
Miquita Douglas Rodrigues,
Caliman Vinicius,
Silva Glaura Goulart
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.46382
Subject(s) - nanofluid , aqueous solution , copolymer , materials science , carbon nanotube , chemical engineering , polymer , fourier transform infrared spectroscopy , acrylic acid , polymer chemistry , nanoparticle , chemistry , organic chemistry , nanotechnology , composite material , engineering
ABSTRACT Polymer aqueous nanofluids have numerous industrial applications due to their synergic properties as a polymer and nanoparticle in the same fluid. The main goal of this work was to prepare stable aqueous nanofluids with improved viscosity in high temperature and salinity conditions. Aminated carbon nanotube (OCNT‐TEPA) presented a CN photoemission peak at 285.5 eV in X‐ray photoelectron spectroscopy spectra, which is evidence of a grafting reaction. Fourier transform infrared spectra presented absorption bands attributed to amide and amine bonds. Elemental analyses showed 1.9 and 3.2 mass % N content increases for OCNT‐TEPA and OCNT‐TEPA‐AM, respectively. Samples aged at 70 °C in brine confirmed that the addition of OCNT‐TEPA increased the viscosity of nanofluids to 30% at day 90 compared to acrylamide–acrylic acid copolymer fluids. N anotubes presented only 35% of the aminated functions compared to carbon black (Lima et al ., Carbon 2016, 109, 209) , and their effects in the enhancement of viscosity and thermal and colloidal stability were 2× greater. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46382.