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Article Dans Une Revue Journal of Applied Polymer Science Année : 2015

Bio-nanocomposite films based on cellulose nanocrystals filled polyvinyl alcohol/chitosan polymer blend

Résumé

Bio-nanocomposite films based on polyvinyl alcohol/chitosan (PVA/CS) polymeric blend and cellulose nanocrystals (CNC) were prepared by casting a homogenous and stable aqueous mixture of the three components. CNC used as nanoreinforcing agents were extracted at the nanometric scale from sugarcane bagasse via sulfuric acid hydrolysis; then they were characterized and successfully dispersed into a PVA/CS (50/50, w/w) blend to produce PVA/CS-CNC bio-nanocomposite films at different CNC contents (0.5, 2.5, 5 wt %). Viscosity measurement of the film-forming solutions and structural and morphological characterizations of the solid films showed that the CNC are well dispersed into PVA/CS blend forming strong interfacial interactions that provide an enhanced load transfer between polymer chains and CNC, thus improving their properties. The obtained bio-nanocomposite films are mechanically strong and exhibit improved thermal properties. The addition of 5 wt % CNC within a PVA/CS blend increased the Young's modulus by 105%, the tensile strength by 77%, and the toughness by 68%. Herein, the utilization of Moroccan sugarcane bagasse as raw material to produce high quality CNC has been explored. Additionally, the ability of the as-isolated CNC to reinforce polymer blends was studied, resulting in the production of the aforementioned bio-nanocomposite films with improved properties.

Dates et versions

hal-01269186 , version 1 (05-02-2016)

Identifiants

Citer

Nassima El Miri, Karima Abdelouahdi, Mohamed Zahouily, Aziz Fihri, Abdellatif Barakat, et al.. Bio-nanocomposite films based on cellulose nanocrystals filled polyvinyl alcohol/chitosan polymer blend. Journal of Applied Polymer Science, 2015, 132 (22), ⟨10.1002/app.42004⟩. ⟨hal-01269186⟩
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