Mechanically Robust, Electrically Conductive Biocomposite Films Using Antimicrobial Chitosan-Functionalized Graphenes
- Mechanically Robust, Electrically Conductive Biocomposite Films Using Antimicrobial Chitosan-Functionalized Graphenes
- 산토쉬 쿠마르 야다브; 정용채; 김진희; 고영일; 류희정; 뮤케쉬 쿠마르 야다브; 김융암; 조재환
- Graphene; Chitosan; Biocomposite; Antimicrobial
- Issue Date
- Particle & particle systems characterization : measurement and description of particle properties and behavior in powders and other disperse systems
- VOL 30, NO 8, 721-727
- An effective way of covalently functionalizing graphene with a chitosan
polymer via a nitrene chemistry is demonstrated. The biofunctionalized
graphene is prepared by the chemical reduction of graphene oxide using a
nitrene chemistry, and then covalently grafting chitosan to the graphene surface.
The effectiveness of the biofunctionalized graphene as a reinforcing fi ller
(4 wt%) in a chitosan polymer matrix is verifi ed by the dramatic enhancement
of the mechanical properties (breaking stress = 330%, Young’s modulus =
243%) and the electrical conductivity (0.3 S m −1 ) without much loss in the
elongation-at-break. The reinforcing effect can be explained by both the
homogeneous dispersion of graphene within the matrix and the strong bond
arising from the intrinsically intimate contact between the graphene and
the matrix. The high antimicrobial activity of the biofunctionalized graphene
compared with graphene oxide and chemically reduced graphene may be
because of the presence of chitosan polymer on the edges of the graphene.
The strong, antimicrobial graphene-fi lled composite fi lm can be used for food
packaging and for coating various biomedical devices, where bacterial surface
colonization is undesirable.
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