Original Article:
L-cysteine reduced/functionalized graphene oxide application as a smart/control release nanocarrier of sustainable cerium ions for epoxy coating anti-corrosion properties improvement
Ali Asghar Javidparvar, et al.
Journal of Hazardous Materials, 2020, 389, 122135.
10.1016/j.jhazmat.2020.122135
Due to the presence of polar functional groups on the surface of GO nanosheets, the low dispersion of nanosheets in organic coatings (containing non-polar solvents) is usually the main disadvantage of using nanosheets in nanocomposites. Therefore, it is necessary to explore green reducing agents to reduce the oxygen functional groups of GO nanosheets to improve the dispersion state of nanoparticles in polymer matrices.
In this work, L-cysteine (L-Cys) was used as a harmless and relatively cheap reducing agent to reduce/modify graphene oxide sheets. Subsequently, cerium cations were introduced by adsorption, and a novel nanocarrier with ceric ion adsorption/desorption capacity was prepared. The results indicated that the L-Cys/GO-Ce nanosheets could enhance the anticorrosion performance of epoxy coatings through the synergistic effect between the released organic and inorganic inhibitors.
Overall, L-Cys plays an important role in three aspects:
(1) GO surface modification and conversion of the non-useful oxygen functional groups (epoxide and hydroxyl) to the useful ones (carboxylic groups).
(2) Reduction of GO to improve the dispersion of the nanosheets in the organic coating.
(3) Acting as an organic inhibitor aside the cerium cations as inorganic inhibitor to provide an inhibition synergism.
Chemicals Related in the Paper:
| Catalog Number | Product Name | Structure | CAS Number | Price |
|---|---|---|---|---|
| ACM130633022 | L-Cysteine |  |
130633-02-2 | Price |
