水热协同酸性低共熔溶剂对泡桐物化性质及酶解效率的影响

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中图分类号：TS74 文献标识码：A DOI：10. 11980/j. issn. 0254-508X. 2025. 05. 001

Effects of Combined Hydrothermal-acid DES Pretreatment on the Physicochemical Properties and Enzymatic Hydrolysis of Paulownia

CHEN Aini1 SUN Lili1 HAN Ying2 CAO Xuefei1 SUN Shaoni1，* （1. College of Materials Science and Technology，Beijing Key Lab of Lignocellulosic Chemistry，Beijing Forestry University， Beijing，100083；2. China National Pulp and Paper Research Institute Co.，Ltd.，Beijing，100102） （ *E -mail：sunshaoni@bjfu. edu. cn）

Abstract：The hydrothermal combined with acidic deep eutectic solvent（DES）treatments were used to pretreat Paulownia to obtain high xylose yield and enzymatic hydrolysis efficiency. Firstly，tartaric acid（TA）assisted hydrothermal pretreatment was utilized to treat Paulownia. The effects of temperature（120～160 ℃），time（15～120 min），and TA quality fraction（ 0～10% ）on xylose yield were investigated. Subsequently， the hydrothermal residue was subjected to post-treatment with deep eutectic solvent（DES）composed of choline chloride and lactic acid operat‐ ed at 90～150 °C for 2～8 h. The results show that the optimal hydrothermal pretreatment conditions were 140‰ ，60 min and quality fraction 4% TA，resulting in a maximum xylose yield of 80.5% . the combined hydrothermal and DES treatments effectively removed hemicellulose and lig‐ nin，leading to increased crystallinity，surface roughness，specific surface area and accessibility of the treated Paulownia. The optimal DES post-treatment conditions were determined to be 130‰ for 6h . Under the optimal treatment conditions，the removal rates of hemicellulose and lignin reached 100% and 89.7% ，respectively，with a cellulose retention rate of 77.3% and an enzymatic hydrolysis efficiency of 85.2% ，which was 4.6 times higher than that of Paulownia.

Key words：hydrothermal pretreatment；deep eutectic solvent；Paulownia；xylose；enzymatic hydrolysis

随着全球经济的高速发展，能源需求持续增加，化石能源危机与环境污染问题日益严重[1]。（剩余15584字）