Extraction Process Optimization and Characterization of Bagasse Cellulose
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Abstract:
Sugarcane bagasse, a byproduct of the sugar industry, was used as a raw material to improve extraction yield and produce cellulose of superior quality. Different extraction methods were compared to determine the optimal extraction process. The extraction temperature, time, and solid-to-liquid ratio were selected based on the results of single-factor experiments. Response surface methodology was used to further optimize the extraction process. The results showed that pretreatment combined with deep eutectic solvent extraction can extract bagasse cellulose more efficiently compared with the acid method and direct deep eutectic solvent extraction. The optimal process conditions were as follows: pretreatment by soaking bagasse in 20% sodium carbonate solution for 24 h, extraction temperature of 103 ℃ , extraction time of 200 min, and solid-to-liquid ratio of 1:25 (g/g). The theoretical optimal and actual cellulose contents were 70.60% and 70.26%, respectively. The structure and properties of the obtained cellulose were studied using scanning electron microscopy, X-ray diffraction, and thermogravimetric analysis. The characterization results revealed that after pretreatment, the extracted bagasse cellulose exhibited a fine and porous structure, with a reduced size, increased crystallinity, and improved thermal stability. This study provides a theoretical basis and technical support for rational utilization of bagasse cellulose resources.
