Cross-linking of cellulose nanofiber films with Glutaraldehyde (cas 111-30-8) for improved mechanical properties
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Add time:08/22/2019 Source:sciencedirect.com
In this work, we present a method to improve the mechanical properties of CNF films by replacing the secondary hydrogen bonding in CNF films with Glutaraldehyde (cas 111-30-8) (GA)-based covalent bonds using acidic catalysts. The CNF film treated with GA exhibits ∼180% higher tensile strength than that for the untreated CNF film. In terms of the elastic modulus, the film shows a value of 12.3 GPa, which is ∼160% higher compared to the untreated CNF film. Using Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analyses on the films, it was found that the mechanical properties of the GA-treated films were significantly affected by the relationship between the degree of GA cross-linking and the reduction in the crystallinity index of the CNFs.
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