Processing and properties of eco-friendly bio-nanocomposite films filled with cellulose nanocrystals from sugarcane bagasse

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• 作者：Mounir El Achaby^a ; ^{mounir.elachaby@um6p.ma} ; Nassima El Miri^b ; Adil Aboulkas^c ; Mohamed Zahouily^b ; Essaid Bilal^d ; Abdellatif Barakat^e ; Abderrahim Solhy^a
• 关键词：Cellulose nanocrystals ; Polymer blend ; Bio-nanocomposite films
• 刊名：International Journal of Biological Macromolecules
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：96
• 期：Complete
• 页码：340-352
• 全文大小：3065 K
• 卷排序：96

文摘

Novel synthesis strategy of eco-friendly bio-nanocomposite films have been exploited using cellulose nanocrystals (CNC) and polyvinyl alcohol/carboxymethyl cellulose (PVA/CMC) blend matrix as a potential in food packaging application. The CNC were extracted from sugarcane bagasse using sulfuric acid hydrolysis, and they were successfully characterized regarding their morphology, size, crystallinity and thermal stability. Thereafter, PVA/CMC-CNC bio-nanocomposite films, at various CNC contents (0.5–10 wt%), were fabricated by the solvent casting method, and their properties were investigated. It was found that the addition of 5 wt% CNC within a PVA/CMC increased the tensile modulus and strength by 141% and 83% respectively, and the water vapor permeability was reduced by 87%. Additionally, the bio-nanocomposites maintained the same transparency level of the PVA/CMC blend film (transmittance of ∼90% in the visible region), suggesting that the CNC were dispersed at the nanoscale. In these bio-nanocomposites, the adhesion properties and the large number of functional groups that are present in the CNC’s surface and the macromolecular chains of the PVA/CMC blend are exploited to improve the interfacial interactions between the CNC and the blend. Consequently, these eco-friendly structured bio-nanocomposites with superior properties are expected to be useful in food packaging applications.