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研究报告

张耿崚,陈细妹,王小琴,韩业钜,李韵莹,叶志超,张永亮,邱晓盛.不同种类表面活性剂联合离子液体预处理稻秆的物化特性研究[J].环境科学学报,2016,36(9):3300-3305

The physico-chemical properties of rice straw after different surfactants-assisted ionic liquid pretreatment

基金项目：福建农业科技计划重点项目（No.2013N0038）；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（No.1143-220413105）；广东省教育厅高等院校学科建设专项资金项目（No.2014KTSP022）；资源综合利用与清洁生产重点实验室

摘要：预处理是提高木质纤维材料酶解效果的关键步骤，更是木质纤维材料制造生物乙醇的重要环节.因此，对木质纤维材料进行预处理以促进酶解糖化过程具有重要意义.本研究以稻秆为原料，探讨不同类型表面活性剂（包括阳离子型、阴离子型、非离子型、生物）联合离子液体对木质纤维材料转化率及酶解初速度的影响，并通过稻秆成分分析、FTIR、XRD对处理前后稻秆的结构、结晶性进行了分析比较.结果表明，与单独离子液体处理相比，表面活性剂联合离子液体预处理稻秆可提升纤维转化率，效果为：生物表面活性剂-离子液体 > 非离子型表面活性剂-离子液体 > 阴离子型表面活性剂-离子液体 > 阳离子型表面活性剂-离子液体.与未处理及单独离子液体处理稻秆相比，生物表面活性剂-离子液体预处理稻秆的纤维转化率分别提高55.38%和22.03%.

Abstract：The pretreatments of lignocellulosic materials are important to enhance the enzymatic saccharification. The effect of different types of surfactants (e.g., cationic, anionic, nonionic, biosurfactants) on ionic liquids pretreatment performance of on rice straws, including conversion rate and hydrolysis initial rate, was investigated. The structure and crystallinity of the rice straws before and after pretreatment were analyzed and compared using composition analysis, Fourier transform infrared spectroscopy, and X-ray diffraction. The results show that compared with using sole ionic liquid, using ionic liquids combined with surfactants elevated the rice straw conversion rates. The effectiveness of the surfactant in ionic liquid combinations, is as follows: biosurfactant > nonionic surfactant > anionic surfactant-, and cationic surfactant. Compared with untreated one and those treated using sole ionic liquids, rice straws treated using biosurfactant-ionic liquid pretreatment exhibited improved lignocellulosic material conversion rate by 55.30% and 22.03%, respectively.