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Updated: Feb 13, 2026
A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size
Published on: October 17, 2016
Eco-friendly process combining acid-catalyst and thermomechanical pretreatment for improving enzymatic hydrolysis of
Imane Semhaoui1, Thierry Maugard2, Ikbal Zarguili3
1Laboratoire des Sciences de l'Ingénieur pour l'Environnement, LaSIE, UMR CNRS 7356, Université de La Rochelle, Avenue Michel Crépeau, 17042 La Rochelle, France; Laboratoire de Chimie de la Matière Condensée, Research Team: Procédés pour l'Energie et l'Environnement, Faculté Polydisciplinaire de Taza, Université Sidi Mohamed Ben Abdellah, Morocco.
Abstract:
The aim of this study was to investigate a pretreatment by combined H2SO4 acid-catalyst and thermomechanical process to improve hemicelluloses solubilization of hemp hurds and subsequently enzymatic hydrolysis extent of potentially fermentable sugars. It was found that the sugars released were gradually increased with treatment severity. Soluble sugars generated before enzymatic hydrolysis (R1) increased up to 2.23 g/L indicating that autohydrolysis reaction occurred during pretreatment. Consequently, the solubilization of hemicelluloses was correlated with combined severity factor (CS). As a result, increase of overall reducing sugars (ORS) from 23.4% (untreated) to 81.4% was observed at optimized conditions of steaming temperature of 165 °C for 30 min and acid loading of 62.9 g/kg DM (dry material) corresponding to CS = 1.2, with limited production of identified by-products: 0.035 g/L and 0.46 g/L (per 100 g DM) for furfural and HMF, respectively. Structural and physicochemical modifications of biomass were observed by FTIR, ABET and SEM.
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