A comparative study on the starch-based biocomposite films reinforced by nanocellulose prepared from different non-wood fibers
- 98 Downloads
Nanocellulose was extracted from three kinds of non-wood fibers (bamboo, cotton linter, and sisal) by TEMPO-mediated oxidation and high pressure homogenization. Starch-based composite films containing different kinds of nanocellulose with different content (0–10 wt%) were prepared via solution casting method. The morphology and structure of the three kinds of nanocellulose and their respective effects on the composite films were compared by various characterizations. The impacts of nanocellulose content on the thermal stability and mechanical properties of the composite films were also evaluated. The study found that morphology and chemical composition of the nanocellulose obtained from different sources were almost the same, but there were slight differences in their size and crystallinity. Bamboo nanocellulose had the highest aspect ratio, which enabled it to provide the greatest reinforcing effects on the mechanical properties and barrier properties of the composite films. The addition of nanocellulose improved the mechanical properties of the films but reduced their elongation at break and thermal stability. This study paves the route for choosing the most effective non-wood nanocelluloe source and mixed ratio to produce food packaging with the best performance.
KeywordsNanocellulose Starch Biocomposite films Green packaging
This work was supported by the Science and Technology Project of Guangdong Province (No. 2017B090901064), the Science and Technology Project of Guangzhou (No. 201607020045).
- And MNA, Dufresne A (2008) Plasticized starch/tunicin whiskers nanocomposites. 1. Structural analysis. Macromolecules 33:8344–8353Google Scholar
- Carvalho AJF (2008) Chapter 15—starch: major sources, properties and applications as thermoplastic materials. In: Monomers polymers & composites from renewable resources, pp 321–342Google Scholar
- Deepa B, Abraham E, Cordeiro N, Mozetic M, Mathew AP, Oksman K, Faria M, Thomas S, Pothan LA, Universitet LT, Matematik IFRT, Materialvetenskap (2015) Utilization of various lignocellulosic biomass for the production of nanocellulose: a comparative study. Cellulose 22:1075–1090CrossRefGoogle Scholar
- Sacui IA, Nieuwendaal RC, Burnett DJ, Stranick SJ, Jorfi M, Weder C, Foster EJ, Olsson RT, Gilman JW (2014) Comparison of the properties of cellulose nanocrystals and cellulose nanofibrils isolated from bacteria, tunicate, and wood processed using acid, enzymatic, mechanical, and oxidative methods. ACS Appl Mater Interfaces 6:6127–6138CrossRefGoogle Scholar
- Santana JS, Do Rosário JM, Pola CC, Otoni CG, Camilloto GP, Cruz RS (2016) Cassava starch-based nanocomposites reinforced with cellulose nanofibers extracted from sisal. J Appl Polym Sci 134:1–9Google Scholar