Covalent modification of graphene oxide by metronidazole for reinforced anti-corrosion properties of epoxy coatings

Abstract

This work reports a promising application of metronidazole (MET) modified graphene oxide (GO) composites (GME) for the corrosion protection of steel.

Synthesis of modified graphene oxide and its improvement on flame retardancy of epoxy resin

“…The synthetic APTES‐bisDOPO was used to functionalize GO. As shown in the Supporting Information Figure S2, GO exhibited the typical absorption peaks of oxygen‐containing groups in its FTIR spectrum and these characteristic peaks were weakened drastically after reacting with APTES‐bisDOPO . In the spectrum of FGO, several new absorption peaks at 3063, 2926 and 2882, 1237, 961 and 917 cm −1 were found, assigned, respectively, to the vibration of ArH, CH 2 , PO, SiOC, POPh bands of APTES‐bisDOPO.…”

“…Hydrochloric acid (HCl), sulfuric acid (H 2 SO 4 , 98%), hydrogen peroxide (H 2 O 2 , 30%), phosphoric acid (H 3 PO 4 ), sodium nitrate (NaNO 3 ), and potassium permanganate (KMnO 4 ) were obtained from Sinopharm Chemical Reagent Co., Ltd. All reagents in analytical grade were used as received without further purification. GO was prepared from graphite using the modified Hummers' method …”

Effect of functionalized graphene oxide with phosphaphenanthrene and isocyanurate on flammability, mechanical properties, and thermal stability of epoxy composites

“…FTIR spectra of graphite, pristine GO, and functionalized GO are presented in Figure S1 (Supplementary Information) and Figure (a). After GO was functionalized with MA, new peaks at 1375 and 1643 cm −1 appeared, which were ascribed to the stretching vibration of the C(O)OH and CC groups in GOMA, respectively, while the characteristic peak at 1720 and 1643 cm −1 corresponded to the CO stretching vibration of ester and carboxylic groups . In the FTIR spectrum of GOMD, the strong absorption peak around 1191 cm −1 was derived from the vibration of PO.…”

“…WILEYONLINELIBRARY.COM/APP tion of the C( O) OH and C C groups in GOMA, respectively, while the characteristic peak at 1720 and 1643 cm −1 corresponded to the C O stretching vibration of ester and carboxylic groups. 24 In the FTIR spectrum of GOMD, the strong absorption peak around 1191 cm −1 was derived from the vibration of P O. It also showed strong absorptions at 754 and 929 cm −1 corresponding to P O Ph stretching, P C stretching absorption around 1056 cm −1 and C O absorption around 1720 cm −1 and stretching absorption of P O C around 1117 cm -1 .…”

The Effect of Graphene on the Protective Properties of Water-Based Epoxy Coatings on Al2024-T3

“…Few papers, however, addressed the development of graphene nanocomposites with the aim of increasing the protective properties of organic coatings against corrosion phenomena [12][13][14][15][16][17]. Reports on epoxy/graphene nanocomposite coatings are less common [14,[18][19][20]] and very few researchers described the use of a waterborne resin [15,[21][22][23][24]; however, the environmentally friendly solutions that take into account the new regulations about the emission of volatile organic compounds [25][26][27][28] are of considerable interest. As it is well known, several types of green surface treatments, or coating systems, have been investigated to decrease the aluminium corrosion rate when exposed to an aggressive environment [28][29][30][31][32][33][34][35][36].…”