METHOD FOR SYNTHESIZING FREE-STANDING POLYVINYL ALCOHOL (PVA) GRAPHENE OXIDE NANOCOMPOSITE FILMS

Abstract

ABSTRACT A method (100) for synthesizing free-standing polyvinyl alcohol (PVA) graphene oxide nanocomposite films, comprising: preparing an aqueous solution of polyvinyl alcohol (PVA); exfoliating graphene oxide (GO) in an aqueous medium to obtain a stable dispersion; combining the exfoliated graphene oxide with the polyvinyl alcohol solution under controlled conditions to ensure uniform dispersion; casting the resulting PVA-GO solution onto a substrate to form films; and employing a controlled drying process to remove the solvent and form free-standing PVA-GO nanocomposite films with enhanced mechanical and thermal properties.

Specification

Description:FIELD OF THE DISCLOSURE
[0001] This invention generally relates to a field of material science and, in particular, to a method for synthesizing free-standing polyvinyl alcohol (PVA) graphene oxide nanocomposite films with enhanced mechanical and thermal properties.
BACKGROUND

[0002] The subject matter discussed in the background section should not be assumed to be prior art merely as a result of its mention in the background section. Similarly, a problem mentioned in the background section or associated with the subject matter of the background section should not be assumed to have been previously recognized in the prior art. The subject matter in the background section merely represents different approaches, which in and of themselves may also correspond to implementations of the claimed technology.
[0003] Graphene oxide (GO) has garnered significant attention due to its exceptional mechanical, thermal, and electrical properties. When incorporated into polymer matrices, such as polyvinyl alcohol (PVA), i , Claims:1. A method (100) for synthesizing free-standing polyvinyl alcohol (PVA) graphene oxide nanocomposite films, comprising:
preparing an aqueous solution of polyvinyl alcohol (PVA);
exfoliating graphene oxide (GO) in an aqueous medium to obtain a stable dispersion;
combining the exfoliated graphene oxide with the polyvinyl alcohol solution under controlled conditions to ensure uniform dispersion;
casting the resulting PVA-GO solution onto a substrate to form films; and
employing a controlled drying process to remove the solvent and form free-standing PVA-GO nanocomposite films with enhanced mechanical and thermal properties.
2. The method (100) of claim 1, wherein the concentration of graphene oxide in the polyvinyl alcohol matrix ranges from 0.1 wt% to 5 wt%.
3. The method (100) of claim 1, wherein the exfoliation of graphene oxide is achieved using ultrasonication and high-shear mixing techniques.
4. The method (100) of claim 1, wherein the controlled drying process enhances the mechanical strength and thermal

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