Journal
CARBOHYDRATE POLYMERS
Volume 149, Issue -, Pages 83-93Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.04.087
Keywords
Thermoplastic starch; Biocomposite; Glycerol; Sorbitol; Microcrystalline cellulose
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Funding
- Spanish Ministry of Economy and Finance (Project NanoCompBioPol) [MAT2013-41892-R]
- Xunta de Galicia Government (Autonomous Community Government)
- FEDER: program ofconsolidation and structuring competitive research units [GRC 2014/036]
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Biocomposites suitable for short-life applications such as food packaging were prepared by melt processing and investigated. Biocomposites studied are wheat starch plasticized with two different molecular weight polyols (glycerol and sorbitol) and reinforced with various amounts of microcrystalline cellulose. The effect of the plasticizer type and the filler amount on the processing properties, the crystallization behavior and morphology developed for the materials, and the influence on thermal stability, dynamic mechanical properties and water absorption behavior were investigated. Addition of microcrystalline cellulose led to composites with good filler-matrix adhesion where the stiffness and resistance to humidity absorption were improved. The use of sorbitol as a plasticizer of starch also improved the stiffness and water uptake behavior of the material as well as its thermal stability. Biodegradable starch-based materials with a wide variety of properties can be tailored by varying the polyol plasticizer type and/or by adding microcrystalline cellulose filler. (C) 2016 Elsevier Ltd. All rights reserved.
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