酸/碱性低共熔溶剂预处理对轻木物化性质及酶水解影响  

Effects of Pretreatment with Acidic/Alkaline Deep Eutectic Solvents on Physical and Chemical Properties and Cellulose Enzymatic Hydrolysis of Balsa Wood

作　　者：唐义泉 芮安娜 杨积有 商赛男 司传领[2] 边静[1] TANG Yiquan;RUI Anna;YANG Jiyou;SHANG Sainan;SI Chuanling;BIAN Jing(Beijing Key Lab of Lignocellulosic Chemistry,Beijing Forestry University,Beijing,100083;Tianjin Key Lab of Pulp and Paper,Tianjin University of Science&Technology,Tianjin,300457)

机构地区：[1]北京林业大学林木生物质化学北京市重点实验室,北京100083 [2]天津科技大学天津市制浆造纸重点实验室,天津300457

出　　处：《中国造纸》2024年第6期1-8,共8页China Pulp & Paper

基　　金：国家自然科学基金(32271804)。

摘　　要：采用酸/碱性低共熔溶剂(DES)在110℃和5 h下预处理轻木原料,分析了预处理前后轻木的化学组成、表面形貌、结构变化和酶水解性能。结果表明,3种酸/碱性DES预处理均可有效解构轻木原料。酸性DES可去除几乎所有的半纤维素和部分木质素,且酸性较强的氯化铝六水合物/丙三醇体系处理导致部分纤维素降解。碱性氯化胆碱/乙醇胺体系预处理后木质素大量去除,残留物中保留大量碳水化合物。预处理可显著增效纤维素酶水解,葡萄糖得率由原料的16.5%提升至52.6%~60.7%。DES经循环使用3次后纤维素酶解效率仍可达原料的2.5倍以上。Balsa wood was subjected to acidic/alkaline deep eutectic solvent(DES)pretreatment at 110℃for 5 h,and the chemical composition,surface morphology,structural variation,and enzymatic hydrolysis performance of the balsa wood before and after pretreatment were analyzed.The results showed that all three types of acidic/alkaline DES pretreatments effectively deconstructed the balsa wood raw material.The acidic DES removed nearly all hemicelluloses and a portion of lignin,with the stronger acidic treatment using acidic aluminum chloride hexahydrate/propanetriol system resulting in partial cellulose degradation.The alkaline choline chloride/ethanolamine system pretreatment led to substantial removal of lignin while preserving a significant amount of carbohydrates in the residue.The pretreatment significantly enhanced cellulase hydrolysis,increasing the glucose yield from 16.5%in the raw material to 52.6%~60.7%.Even after being recycled three times,the cellulose hydrolysis rate of DES remained more than 2.5 times higher than that of the raw material.

关 键 词：轻木 低共熔溶剂 预处理 酶解 循环使用 

分 类 号：TS74[轻工技术与工程—制浆造纸工程]