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Article Dans Une Revue Polymers Année : 2023

Dispersion of Cellulose Nanofibers in Methacrylate-Based Nanocomposites

Résumé

Poly(methylmethacrylate-co-methacrylic acid) (PMMA-co-MAA) polymers were prepared via cobalt-mediated free radical copolymerization and were characterized after synthesis. The synthesis led to a 98.5% conversion and a final ratio between the two units, MMA/MAA, was equal to 63:37 mol%. PMMA-co-MAA was then used as a matrix for cellulose-based nanocomposites to tailor filler compatibility, thanks to the presence of carboxylic groups capable of generating strong H-bonds with the cellulose surface. Cellulose nanofibers (CNFs) were dispersed using a solution with a mixture of two solvents to tailor compatibility of both the components. For this purpose, CNFs were successfully re-dispersed in methanol using the solvent exchange method and tetrahydrofuran/methanol mixtures at different ratios were used for the preparation of the films. Fully transparent films of PMMA-co-MAA + CNF were prepared up to 15 wt% of CNF with a good dispersion in the matrix. This dispersion state leads to the reinforcement of the polymethacrylate matrix, increasing its tensile strength whilst preserving optical transparency.
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Dates et versions

hal-04189405 , version 1 (28-08-2023)

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Valentina Cavallo, Sébastien Pruvost, Jean-François Gerard, Alberto Fina. Dispersion of Cellulose Nanofibers in Methacrylate-Based Nanocomposites. Polymers, 2023, 15 (15), pp.3226. ⟨10.3390/polym15153226⟩. ⟨hal-04189405⟩
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