异丁酸酐室温均相改性甘蔗渣的研究
【目的】建立一种室温均相改性农林废弃物的方法.【方法】选用甘蔗渣为原料,在室温下,将其溶解在二甲基亚砜/1-甲基咪唑溶剂体系中,利用异丁酸酐为改性剂,对甘蔗渣进行了均相改性研究.【结果和结论】保持反应时间为180 min,将酸酐与甘蔗渣质量比从1∶1提高到6∶1时,甘蔗渣均相衍生化的反应得率由10.3%增加到49.2%;保持酸酐与甘蔗渣质量比为3∶1,将反应时间由15 min提高到45 min,反应得率由25.1%增加到27.4%,但进一步延长反应时间,反应得率略有下降,反应时间240 min时,反应得率降低至24.7%.利用FT-IR和CP/MAS 13 C-NMR分析发现,甘蔗渣与异丁酸酐...
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Published in | 华南农业大学学报 Vol. 35; no. 4; pp. 92 - 96 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
华南农业大学新能源与新材料研究所,广东广州,510642
2014
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Subjects | |
Online Access | Get full text |
ISSN | 1001-411X |
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Summary: | 【目的】建立一种室温均相改性农林废弃物的方法.【方法】选用甘蔗渣为原料,在室温下,将其溶解在二甲基亚砜/1-甲基咪唑溶剂体系中,利用异丁酸酐为改性剂,对甘蔗渣进行了均相改性研究.【结果和结论】保持反应时间为180 min,将酸酐与甘蔗渣质量比从1∶1提高到6∶1时,甘蔗渣均相衍生化的反应得率由10.3%增加到49.2%;保持酸酐与甘蔗渣质量比为3∶1,将反应时间由15 min提高到45 min,反应得率由25.1%增加到27.4%,但进一步延长反应时间,反应得率略有下降,反应时间240 min时,反应得率降低至24.7%.利用FT-IR和CP/MAS 13 C-NMR分析发现,甘蔗渣与异丁酸酐发生了酯化反应,在甘蔗渣中引入了带有烷基的酯键基团.甘蔗渣中的碳水化合物和木质素分子均参与了化学反应. |
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Bibliography: | dimethyl sulfoxide/1-methylimidazole;room temperature;homogeneous derivatization;sug-arcane bagasse;isobutyric anhydride ZHANG Aiping, XIE Jun (Institute of New Energy and New Material, South China Agricultural University, Guangzhou 510642, China) 44-1110/S Objective] A new method for homogeneous modification of agricultural and forest residues at room temperature was proposed .[Method] Homogeneous derivatization of sugarcane bagasse with isobu-tyric anhydride in the dimethyl sulfoxide/1-methylimidazole ( DMSO/NMI) solvent system was investiga-ted at room temperature in the present study .[Result and conclusion] Holding reaction time for 180 min, the mass percent gain ( WPG) of sugarcane bagasse increased from 10.3%to 49.2%with the increment of the mass ratio of isobutyric anhydride to ball-milled sugarcane bagasse from 1∶1 to 6∶1.The increase of reaction time from 15 min to 45 min resulted in an enhancement of WPG from 25.1% to 27.4%, keeping the mass ratio of isobutyric anhydride to ball-milled sugarcane bagas |
ISSN: | 1001-411X |