该研究以制糖业生产废弃物甘蔗渣为原料，以提高提取得率和获得含量更高，性能更好的纤维素为目标，对比不同提取方法研究最佳提取工艺。在单因素筛选提取温度、时间和料液比的基础上，应用响应面法进一步优化。结果表明，预处理加深度共熔溶剂提取法较酸法和直接深度共熔溶剂提取法能更高效地提取蔗渣纤维素。最优工艺条件为：采用20%质量浓度碳酸钠浸泡24 h进行预处理、提取温度103 ℃、时间200 min、料液比1:25（g/g），获得的最佳理论和实际纤维素含量分别为70.60%和70.26%。采用扫描电镜、X射线衍射、热重分析等对纤维素的结构和性质进行分析，表征结果表明：提取处理后纤维素结构细密多孔、尺寸变小、结晶度提高、热稳定性变好。该研究可为甘蔗渣纤维素资源的合理利用提供一定的理论依据与技术支持。

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.

华南理工大学“百步梯攀登计划”项目（j2tw202202094）；广东省大学生创新创业训练计划（S202310561303）