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Tuning the pH‐responsiveness capability of poly(acrylic acid‐co‐itaconic acid)/NaOH hydrogel: Design, swelling, and rust removal evaluation
Author(s) -
OlveraSosa Miguel,
GuerraContreras Antonio,
GómezDurán Cesar F. A.,
GonzálezGarcía Raúl,
Palestino Gabriela
Publication year - 2020
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.48403
Subject(s) - itaconic acid , acrylic acid , materials science , thermogravimetry , swelling , citric acid , chemical engineering , corrosion , scanning electron microscope , pickling , metal , carbon steel , copper , nuclear chemistry , polymer chemistry , copolymer , polymer , composite material , chemistry , metallurgy , organic chemistry , engineering
The swelling behavior of poly(acrylic acid‐co‐itaconic acid)/NaOH hydrogel as well as its ability for iron and copper rust removal was studied and established for the first time. Through an experimental design, the influence of the synthesis parameters on hydrogel response was determined. It was found that pH‐responsiveness dependence of hydrogel determines its application. In alkaline media, the hydrogel acted as superabsorbent, while in acidic, the most outstanding property was its pickling capability that allowed to clean carbon steel and copper metallic surfaces. Infrared, thermogravimetry, and scanning electron microscopy were performed to determine copolymer formation, thermal properties, and morphology. Metallic crystallographic phases formed during the corrosion processes were determined by X‐ray diffractometer. Hydrogel adhesiveness followed by diffusion and dissolution of metal oxides species was identified as the main steps in the rust removal mechanism. This method offers a new, environmentally friendly perspective to eliminate corrosion from metallic surfaces compared with traditional strategies. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137 , 48403.