Characterization of Defatted Rice Bran Properties for Biocomposite Production
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Publication Details
Author list: Kunanopparat T., Menut P., Srichumpoung W., Siriwattanayotin S.
Publisher: Springer
Publication year: 2014
Journal: Journal of polymers and the environment (1566-2543)
Volume number: 22
Issue number: 4
Start page: 559
End page: 568
Number of pages: 10
ISSN: 1566-2543
eISSN: 1572-8900
Languages: English-Great Britain (EN-GB)
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Abstract
Commercial defatted rice bran (DRB) was characterized to produce biocomposite. DRB extracted protein plasticized with glycerol presented viscoelastic properties. The whole DRB with different amount and type of plasticizers was extruded into pellets. All extrudates presented pseudoplastic behavior as determined by capillary rheometer. Power-law index (n) and flow behavior consistency (K) of all DRB extrudates were respectively in a range of 0.30–0.32 and 1.2–3.8 × 104 which is closed to agro-polymer due to a modification of DRB structure after extrusion process. In addition, extrusion process promoted protein aggregation. However, no significant effect of plasticizer type and content on DRB protein aggregation for a given temperature processing was observed. The effect of plasticizer content on tensile properties presented the same trend as viscosity results. Extrudate that had a high viscosity presented high mechanical properties. © 2014, Springer Science+Business Media New York.
Keywords
Defatted rice bran, Plasticizer
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