Efficient fractionation of sugarcane bagasse with phenoxyethanol under mild condition
In this study,efficient fractionation of sugarcane bagasse(SCB)with acidified phenoxyethanol(EPH)was investigated.High lignin(90.33%)and hemicellulose(76.70%)removal efficiency with 90.47%cellulose retention was achieved by using EPH at 110℃,60 min,with 0.05 mol/L acid loading for SCB.The enzymatic digestibility of residue reached 89.71%,which was nearly 6 times that of the untreated sugarcane bagasse(15.93%).74.29%lignin of 93.53%purification was recovered from the pretreatment solution using isopropyl ether.SEM,XRD,and FTIR were used to characterize the composition and structure of the pretreated residue and raw materials.It was found that the morphological structure of bagasse was destroyed,the crystallinity was improved,and the enzymatic digestibility was greatly improved.Additionally,the etherification of phenoxyethanol and lignin to suppress the condensation of lignin was disclosed by 2D HSQC characterization.Overall,EPH pretreatment achieved efficient fractionation and recovery of high purity lignin and fermentable sugars under mild condition from sugarcane bagasse.This study can provide reference for the high-value utilization of lignocellulosic biomass.
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