摘要：Lignocellulose is a renewable biomass resource, widely used in the fermentation. A reasonable pretreatment method is the key to reducing production costs and promoting the efficient transformation of lignocellulose. In this paper, the uniform design method was used to optimize the corn straw using aluminum trichloride, and the components and the structure of corn straw were analyzed. The optimum treatment conditions were as follows: the concentration of aluminum trichloride was 0.3 mol/L, the reaction temperature was 170 °C, the reaction time was 30 minutes, and the ratio of liquid to solid was 15:1 mL/g. Under these optimal conditions, the enzymatic hydrolysis results showed that the yield of the reducing sugar was 46.6%, which was higher than that of corn straw without pretreatment. The non-stereoregular material content decreased significantly, and the relative content of cellulose increased by 7.95%. X-ray diffraction (XRD) and scanning electron microscopy (SEM) results showed that the spatial structure of the straw was destroyed and the relative crystallinity of the cellulose decreased. After pretreatment, Fourier transform infrared spectroscopy (FTIR) results demonstrated that the functional groups had undergone significant changes, and the hydrogen bonds were destroyed, which is favorable for the molecular adsorption of cellulase.
