Biorefinery valorization of autohydrolysis wheat straw hemicellulose to be applied in a polymer-blend film

• Published in: Carbohydrate polymers Vol. 92; no. 2; pp. 2154 - 2162
• Main Authors: Ruiz, Héctor A., Cerqueira, Miguel A., Silva, Hélder D., Rodríguez-Jasso, Rosa M., Vicente, António A., Teixeira, José A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15-02-2013; Elsevier
• Subjects: Applied sciences; beans; Biorefinery concept; biorefining; Exact sciences and technology; Extraction; hemicellulose; Hydrolysis; Hydrothermal process; Lignocellulosic material; Natural polymers; opacity; Permeability; Physicochemistry of polymers; Polymeric blends films; Polysaccharides - chemistry; Polysaccharides - isolation & purification; Science & Technology; Starch and polysaccharides; Statistics as Topic; Tensile Strength; thermal properties; Triticum - chemistry; Volatilization; Water - chemistry; water content; water vapor; wheat straw; Polymeric blends films; Biorefinery concept; Extraction; Hydrothermal process; Lignocellulosic material; Strengthening; Hemicellulose; Transport properties; Molecular structure; Carob gum; Response surface methodology; Optimization; Thermal stability; Straw; Intermolecular interaction; Steam permeability; Optical properties; Physical separation; Opacity; Polymer blends; Ternary mixture; Cereal by product; Mechanical properties; Experimental study; Operating conditions; Vegetal waste; Hydrolysis; Oside polymer; Carrageenan
• ISSN: 0144-8617; 1879-1344; 0144-8617
• DOI: 10.1016/j.carbpol.2012.11.054

[Display omitted]
► Fractionation of hemicellulose and production of polymeric blend film according to biorefinery concept. ► Autohydrolysis is an environmentally friendly technology. ► Hemicellulose was extracted from wheat straw using autohydrolysis process. ► Autohydrolysis extracted hemicellulose is a good material in the reinforcement of polymeric blend films. ► Extracted hemicellulose improved the physical and mechanical properties of the polymeric blend films.
The aims of this study were the extraction of hemicellulose from wheat straw (WS) and its utilization in the reinforcement of a κ-carrageenan/locust bean gum (κ-car/LBG) polymeric blend films (PBFs). WS hemicellulose extraction was performed under autohydrolysis process and hemicellulose extracted (HE) under optimum condition was used in PBFs. PBFs were prepared varying different proportions of HE into the κ-car/LBG film-forming solutions. Barrier properties (water vapor permeability, WVP), mechanical properties (tensile-strength, TS and elongation-at-break, EB), moisture content, opacity and thermal properties of the resulting PBFs were determined and related with the incorporation of HE. The 2-3-2 proportion (in the high ratio) of PBF (κ-car/LBG/HE) causes a slight decrease of WVP and an increase of the TS, thus resulting in an improvement of the physical properties of PBFs. HE showed to be a promising material in order to reinforce κ-car/LBG PBF and can be an alternative in the application of hemicellulose according to biorefinery concept.