采用十六烷基三甲基溴化铵和乙二醇合成的深共晶溶剂提高油菜秸秆的酶水解效率。
Employing deep eutectic solvent synthesized by cetyltrimethylammonium bromide and ethylene glycol to advance enzymatic hydrolysis efficiency of rape straw.
机构信息
School of Pharmacy & School of Biological and Food Engineering, Changzhou University, Changzhou 213164, Jiangsu Province, China.
International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
出版信息
Bioresour Technol. 2023 Nov;387:129598. doi: 10.1016/j.biortech.2023.129598. Epub 2023 Jul 31.
An efficient deep eutectic solvent (DES) was synthesized by cetyltrimethylammonium bromide (CTAB) and ethylene glycol (EG) and employed to treat rape straw (RS) for advancing enzymatic saccharification in this work. By optimizing the pretreatment parameters, the results displayed that the novel DES was strongly selective towards removing lignin and xylan while preserving cellulose. Under optimum conditions with 1:6 of CTAB: EG in DES, 180 °C and 80 min, the enzymatic hydrolysis efficiency of RS was enhanced by 46.0% due to the 62.2% of delignification and 53.2% of xylan removal during CTAB: EG pretreatment. In terms of the recalcitrant structure of RS, DES pretreatment caused the increment of cellulosic accessibility, reduction of hydrophobicity and surface area of lignin, and migration of cellulosic crystalline structure, which was associated with its enzymatic hydrolysis efficiency. Overall, this study presented an emerging method for the effective fractionation and valorization of lignocellulosic biomass within biorefinery technology.
一种高效的深共熔溶剂（DES）由十六烷基三甲基溴化铵（CTAB）和乙二醇（EG）合成，并用于处理油菜秸秆（RS），以提高酶解糖化效率。通过优化预处理参数，结果表明，新型 DES 对去除木质素和木聚糖具有很强的选择性，同时保留纤维素。在 DES 中 CTAB:EG 为 1:6、180°C 和 80min 的最佳条件下，由于 CTAB:EG 预处理过程中木质素脱除率为 62.2%，木聚糖去除率为 53.2%，RS 的酶解效率提高了 46.0%。就 RS 的抗性结构而言，DES 预处理导致纤维素可及性增加、木质素疏水性和表面积降低以及纤维素结晶结构迁移，这与其酶解效率有关。总的来说，该研究为生物炼制技术中木质纤维素生物质的有效分离和增值提供了一种新方法。
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