Enhanced Mechanical and Antibacterial Properties of Nanocomposites Based on Poly(vinyl Alcohol) and Biopolymer-Derived Reduced Graphene Oxide
| Autor: | Shin-Kwan Kim, Seongjin Lee, Young-Bin Park, Beom-Gon Cho, Shalik Ram Joshi, Gun-Ho Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Vinyl alcohol
Materials science Polymers and Plastics thermally reduced graphene oxide engineering.material mechanical properties Article thermal stability law.invention lcsh:QD241-441 chemistry.chemical_compound shellac lcsh:Organic chemistry antibacterial activity law Shellac Ultimate tensile strength nanocomposites Thermal stability Nanocomposite Graphene General Chemistry Dynamic mechanical analysis poly(vinyl alcohol) Chemical engineering chemistry visual_art visual_art.visual_art_medium engineering Biopolymer |
| Zdroj: | Polymers Volume 13 Issue 4 Polymers, Vol 13, Iss 615, p 615 (2021) |
| ISSN: | 2073-4360 |
| Popis: | Functionalized graphene–polymer nanocomposites have gained significant attention for their enhanced mechanical, thermal, and antibacterial properties, but the requirement of multi-step processes or hazardous reducing agents to functionalize graphene limits their current applications. Here, we present a single-step synthesis of thermally reduced graphene oxide (TrGO) based on shellac, which is a low-cost biopolymer that can be employed to produce poly(vinyl alcohol) (PVA)/TrGO nanocomposites (PVA–TrGO). The concentration of TrGO varied from 0.1 to 2.0 wt.%, and the critical concentration of homogeneous TrGO dispersion was observed to be 1.5 wt.%, below which strong interfacial molecular interactions between the TrGO and the PVA matrix resulted in improved thermal and mechanical properties. At 1.5 wt.% filler loading, the tensile strength and modulus of the PVA–TrGO nanocomposite were increased by 98.7% and 97.4%, respectively, while the storage modulus was increased by 69%. Furthermore, the nanocomposite was 96% more effective in preventing bacterial colonization relative to the neat PVA matrix. The present findings indicate that TrGO can be considered a promising material for potential applications in biomedical devices. |
| Databáze: | OpenAIRE |
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