Surface modification of graphene oxide for preparing self-healing nanocomposite hydrogels


Ceper E. B., Su E., Okay O., Güney O.

POLYMERS FOR ADVANCED TECHNOLOGIES, vol.33, no.7, pp.2276-2288, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33 Issue: 7
  • Publication Date: 2022
  • Doi Number: 10.1002/pat.5680
  • Journal Name: POLYMERS FOR ADVANCED TECHNOLOGIES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.2276-2288
  • Keywords: mechanical properties, modified graphene oxide, nanocomposite hydrogels, self-healing, TOUGH, FUNCTIONALIZATION, ADSORPTION, POLYMERS, WATER, GEL
  • Istanbul Technical University Affiliated: Yes

Abstract

In this work, graphene oxide (GO) and vinyl modified GO (V-GO)-based nanocomposite hydrogels with improved mechanical property and self-healing ability have been synthesized and characterized. GO first was synthesized by modified Hummer's method using graphite powder and then functionalized with vinyl groups by using (3-mercaptopropyl) trimethoxysilane (MPTS) via silanization method. The GO and V-GO nanoparticles were characterized by FT-IR, UV-vis spectroscopy, SEM, and dynamic light scattering technique (DLS). Hydrogels were obtained by in-situ free-radical polymerizations of acrylamide (AAm) and [3-(methacryloylamino)propyl] trimethylammonium chloride (MAPTAC) monomers in the presence of GO and V-GO nanoparticles. The effects of the amount of GO and V-GO on the gelation profile and viscoelastic characteristics of the hydrogels were studied. The pH-responsive action, swelling behavior, and swelling kinetics of the hydrogels with various GO and V-GO contents were also evaluated. The mechanical performance of nanocomposite cationic hydrogels prepared with GO and V-GO nanosheets was compared to the neat AAm-MAPTAC hydrogels. The self-healing ability of the hydrogels were elucidated as a function of the amount of GO and V-GO nanosheets bound to the polymer network by physical interactions and chemical cross-links, respectively.