Preparation of polyoxazoline-modified reduced graphene oxide and its incorporation into silica

Abstract

Amino-terminated poly(2-methyl-2-oxazoline) (PMeOXz-NH 2 ) was synthesized using the living cationic ring-opening polymerization of 2-methyl-2-oxazoline (MeOXz). PMeOXz chains were introduced onto graphene oxide (GO) by the condensation reaction between GO and PMeOXz-NH 2 to give PMeOXz-grafted GO (PMeOXz-g-GO), which was converted to PMeOXz-grafted reduced graphene oxide (PMeOXz-g-rGO) by hydrazine reduction. Acid-catalyzed sol-gel method of tetraethoxysilane was carried out in the presence of PMeOXz-g-rGO to give a transparent PMeOXz-g-rGO/SiO 2 hybrid retaining the optical property of rGO.

Polyoxazoline‐modified graphene oxides with improved water and epoxy resin dispersibility and stability towards composite applications

“…However, due to the toxicity and steric reasons, it is generally used as partially modified PEI conjugates. 35,36 Aside from drug delivery, [37][38][39][40] gene delivery, 35,41 and photothermal therapy applications, 42 poly (2-ethyl-2-oxazoline), 43 poly(2-methyl-2-oxazoline), 44,45 partially hydrolyzed poly(2-methyl-2-oxazoline), 46 and branched polyethyleneimine [47][48][49] were also integrated into the graphene-based nanomaterials to increase the interfacial interactions, dispersion stability, mechanical, dielectric, and gas barrier properties of the polymer nanocomposites. Tong et al prepared nanocomposite films of poly(vinylidene-co-hexafluoropropylene) (PVDF-HFP) and PEImodified graphene sheets.…”