Synthesis and characterization of GO-hydrogels composites

The preparation of poly(N-isopropylacrylamide) (PNIPAm) hydrogel nanocomposites containing graphene oxide (GO) and GO plus carbon nanotubes (CNT) in the polymer network is communicated. This one-pot preparation methods include the dispersion of GO (or GO plus CNT) in a solution of monomers and the s...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2017-10, Vol.258 (1), p.12002
Main Authors: Pereyra, J Y, Cuello, E A, Rodriguez, R Coneo, Barbero, C A, Yslas, E I, Salavagione, H J, Acevedo, D F
Format: Article
Language:English
Subjects:
Absorption
Antibiotics
Antiinfectives and antibacterials
Biomedical materials
Carbon nanotubes
Dispersion
Electrochemical analysis
Graphene
Hydrogels
Modulus of elasticity
Nanocomposites
Polyisopropyl acrylamide
Polymers
Pseudomonas aeruginosa
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The preparation of poly(N-isopropylacrylamide) (PNIPAm) hydrogel nanocomposites containing graphene oxide (GO) and GO plus carbon nanotubes (CNT) in the polymer network is communicated. This one-pot preparation methods include the dispersion of GO (or GO plus CNT) in a solution of monomers and the subsequent polymerization. The texture of the nanocomposites was studied using scanning electron microscopy (SEM), where very compact surfaces are observed suggesting good dispersion of GO sheets and CNTs within the polymer matrix. The presence of GO inside the polymer network diminished the equilibrium swelling values and increased the elastic modulus up to 162 % with respect to the pure gel. Similar results were observed for the composite with CNT. Furthermore, the electrical resistivity of PNIPAm-GO diminishes as the applied compression force increases, being 50 % lower than hydrogel without GO. Moreover, the electrochemical properties of the hydrogels, evaluated by cyclic voltammetry, indicate highly reversible electrical charge/discharge response. In order to apply these materials for antibiotic delivery, the absorption of tetracycline (tet) is evaluated and the nanocomposites showed better absorption capability and improved antibiotic delivery. Preliminary results suggest that tet loaded PNIPAm-GO and PNIPAM-GO-CNT display antimicrobial activity against the Pseudomonas aeruginosa turning these materials as potential candidates for biomedical applications.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/258/1/012002