超声波辅助离子液体-盐酸溶液预处理稻秆的研究  

Study on ultrasound assisted ionic liquid-hydrochloric acid pretreatment process for rice straw

作　　者：韩业钜 张耿崚 邱晓盛 刘梓铨 王小琴[1] 陈细妹[1] 邓昊[1] 李清荷 黄佳舒 

机构地区：[1]广东工业大学环境科学与工程学院和环境健康与污染控制研究院,广州510006

出　　处：《环境科学学报》2018年第1期283-290,共8页Acta Scientiae Circumstantiae

基　　金：广东工业大学青年基金(No.14QNZD005);广东工业大学青年百人A类项目(No.1143-220413105);广东工业大学研究生创新创业实践及竞赛项目(No.2016YJSCX034);广东省教育厅高等院校学科建设专项资金项目(No.2014KTSP022)~~

摘　　要：为研究超声波对离子液体-盐酸溶液预处理木质纤维素的影响,采用氯化-1-丁基-3-甲基咪唑和氯化-1-烯丙基-3-甲基咪唑的盐酸溶液在超声辅助下对稻秆于30~70℃进行预处理,探讨了温度、酸度和处理时间对酶解产糖量的影响,并在最佳条件下通过酶解糖化、成分分析、表面形貌、结晶度及化学结构的变化对有无超声辅助下预处理的效果进行考察.结果表明,温度、酸度及处理时间对酶解产糖量具有显著影响,在超声波辅助下,产糖量、纤维转化率及脱木质素率分别提高20.13%~28.96%、31.69%~35.23%和18.06%~19.33%.扫描电镜、X-射线衍射及傅里叶变换红外光谱分析表明,超声波辅助离子液体-盐酸溶液预处理能够促进对稻秆表面形貌和化学结构的破坏,并降低纤维素的结晶度.The hydrochloric acid catalyzed process in 1-butyl-3-methylimidazolium chloride and 1-allyl-3-methylimidazolium chloride aqueous solutions under ultrasound irradiation to treat the rice straw at 30-70 ℃ were investigated.The effect of temperature,acid concentration and reaction time on the production of reducing sugar was studied.Moreover,the enhancement of ultrasound on the pretreatment was also explored from the aspects of enzymatic saccharification,composition,morphology,crystalline and chemical structure.The results show that the temperature,acid concentration and reaction time have a significant effects on enzymatic hydrolysis.The production of reducing sugar,cellulose conversion and delignification were increased by 20.13%-28.96%,31.69-35.23% and 18.06-19.33%,respectively,under the irradiation of ultrasound.On the other hand,the results of SEM,XRD and FTIR analysis also demonstrate that the ultrasound could promote the destruction of chemical structure and crystalline of rice straw in hydrochloric acid catalyzed process in ionic liquid aqueous solutions.

关 键 词：盐酸 超声波 离子液体 稻秆 酶解 木质纤维素 

分 类 号：X705[环境科学与工程—环境工程]