Journal
CARBOHYDRATE POLYMERS
Volume 206, Issue -, Pages 726-733Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2018.11.055
Keywords
Isosorbide; Thermoplastic starch; Internal mixer; Microcrystalline cellulose; Biocomposite
Categories
Funding
- Xunta de Galicia Government
- FEDER: program of consolidation and structuring competitive research units [GRC 2014/036]
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Innovative, green and fully biodegradable biocomposites, based on plasticized corn starch, were prepared by melt processing and filled with microcrystalline cellulose (MCC). Isosorbide and glycerol were used as plasticizers. The effect of the type and content of the plasticizer and the filler addition on processing, surface morphologies, crystallinity and thermal stability were investigated. Aged materials were analyzed too to study the retrogradation phenomena along the time. The processing using isosorbide required lower temperatures but greater shear and processing times leading to more homogeneous biocomposites. With isosorbide, higher crystallinity and no retrogradation signals were observed as clearly occurred with glycerol. The thermal stability of biocomposites was high too. These properties enhanced in a greater extent when the isosorbide content was 35% and with the MCC incorporation, the last due to a good adhesion of MCC to the matrix. These biocomposites could be a good option for packaging applications.
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