title: Biorefinery valorization of autohydrolysis wheat straw hemicellulose to be applied in a polymer-blend film.
abstract: 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.
authors: IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. hector_ruiz@deb.uminho.pt
authors: Héctor A
authors: HA
authors: Ruiz
authors: Miguel A
authors: MA
authors: Cerqueira
authors: Hélder D
authors: HD
authors: Silva
authors: Rosa M
authors: RM
authors: Rodríguez-Jasso
authors: António A
authors: AA
authors: Vicente
authors: José A
authors: JA
authors: Teixeira
mesh_terms: D006868:Hydrolysis; D010539:Permeability; D011134:Polysaccharides / Q000737:chemistry* / Q000302:isolation & purification; D013223:Statistics as Topic; D013718:Tensile Strength; D014908:Triticum / Q000737:chemistry*; D014835:Volatilization; D014867:Water / Q000737:chemistry
chemical_list: D011134:Polysaccharides; D014867:Water; C007916:hemicellulose