离子液体水溶液中纤维素的温和处理
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摘要
在温和条件(90℃、常压)下,以无定形纤维素和微晶纤维素(MCC)为原料,考察1-丁基-3-甲基咪唑氯盐水溶液处理过程中纤维素溶解和结构变化规律。与MCC不同,无定形纤维素可溶解在60%～95%1-丁基-3-甲基咪唑氯盐水溶液中。处理时间和1-丁基-3-甲基咪唑氯盐含量是影响MCC结晶度指数、平均微晶尺寸和氢键强度的重要因素。与未处理样品聚合度(286)相比,处理后MCC的聚合度减小至235～254。研究结果有利于深入理解和优化离子液体水溶液预处理木质纤维生物质过程。
Dissolution of cellulose in 1-butyl-3-methylimidazolium chloride([C_4C_1im]Cl) aqueous solutions under mild conditions(90 ℃, ambient pressure) and its structure changed after dissolution were investigated using amorphous cellulose and microcrystalline cellulose(MCC) as feedstocks. Compared with MCC, amorphous cellulose could be dissolved in 60%-95% [C_4C_1im]Cl aqueous solutions. Treatment time and [C_4C_1im]Cl content were the main factors to influence the crystallinity index, average crystallite size and hydrogen bond intensity of MCC. Comparing with those untreated samples(286), the polymerization degree of MCC after treatment decreased to 235-254. The results of this study favored understanding and optimizing the process conditions to treat lignocellulosic biomass in ionic liquid aqueous solutions.
Dissolution of cellulose in 1-butyl-3-methylimidazolium chloride([C_4C_1im]Cl) aqueous solutions under mild conditions(90 ℃, ambient pressure) and its structure changed after dissolution were investigated using amorphous cellulose and microcrystalline cellulose(MCC) as feedstocks. Compared with MCC, amorphous cellulose could be dissolved in 60%-95% [C_4C_1im]Cl aqueous solutions. Treatment time and [C_4C_1im]Cl content were the main factors to influence the crystallinity index, average crystallite size and hydrogen bond intensity of MCC. Comparing with those untreated samples(286), the polymerization degree of MCC after treatment decreased to 235-254. The results of this study favored understanding and optimizing the process conditions to treat lignocellulosic biomass in ionic liquid aqueous solutions.
引文
[1] WANG H,GURAU G,ROGERS R D,et al.Ionic liquid processing of cellulose[J].Chemical Society Reviews,2012,41(4):1519-1537.
[2] BRANT A,RAY M J,TO T Q,et al.Ionic liquid pretreatment of lignocellulosic biomass with ionic liquid-water mixtures[J].Green Chemistry,2011,13(9):2489-2499.
[3] FU D B,MAZZA G.Optimization of processing conditions for the pretreatment of wheat straw using aqueous ionic liquid[J].Bioresource Technology,2011,102(17):8003-8010.
[4] BRANDT A,J GR?SVIK,HALLETT J P,et al.Deconstruction of lignocellulosic biomass with ionic liquids[J].Green Chemistry,2013,15(3):550-583.
[5] 王琳琳,魏立纲,王艳涛,等.离子液体-水体系下微波辅助脱木质素研究[J].大连工业大学学报,2015,34(6):441-444.
[6] MAZZA M,CATANA D A,VACA-GARCIA C,et al.Influence of water on the dissolution of cellulose in selected ionic liquids[J].Cellulose,2009,16(2):207-215.
[7] BHARGAVA B L,YASAKA Y,KLEIN M L.Computational studies of room temperature ionic liquid-water mixtures[J].Chemical Communication,2011,47(22):6228-6241.
[8] IGUCHI M,AIDA T M,WATANABE M,et al.Dissolution and recovery of cellulose from 1-butyl-3-methylimidazolium chloride in presence of water[J].Carbohydrate Polymers,2013,92(1):651-658.
[9] OLSSON C,IDSTR?M A,NORDSTIERNA L,et al.Influence of water on swelling and dissolution of cellulose in 1-ethyl-3-methylimidazolium acetate[J].Carbohydrate Polymers,2014,99(1):438-446.
[10] SHI J,BALAMURUGAN K,PARTHASARATHI R,et al.Understanding the role of water during ionic liquid pretreatment of lignocellulose:co-solvent or anti-solvent[J].Green Chemistry,2014,16(8):3830-3840 .
[11] WEI L G,LI K L,MA Y C,et al.Dissolving lignocellulosic biomass in a 1-butyl-3-methylimidazolium chloride-water mixture[J].Industrial Crops & Products,2012,37(1):227-234.
[12] HOU X D,LI N,ZONG M H.Significantly enhancing enzymatic hydrolysis of rice straw after pretreatment using renewable ionic liquid-water mixtures[J].Bioresource Technology,2013,136(12):469-474.
[13] PRONYK C,MAZZA G.Optimization of processing conditions for the fractionation of triticale straw using pressurized low polarity water[J].Bioresource Technology,2011,102(2):2016-2025.
[14] 王琳琳,魏立纲,马英冲,等.1-丁基-3-甲基咪唑氯盐离子液体水溶液对纤维素的作用[J].化工学报,2015,66(S1):32-37.
[15] MANSIKKAM?KI P,LAHTINEN M,RISSANEN K.Structural changes of cellulose crystallites induced by mercerisation in different solvent systems;determined by powder X-ray diffraction method[J].Cellulose,2005,12(3):233-242.
[16] NISHIYA Y,LANGAN P,CHANZY H.Crystal structure and hydrogen-bonding system in cellulose Iβ from synchrotron X-ray and neutron fiber diffraction[J].Journal of American Chemistry Society,2002,124(31):9074-9082.
[17] OH S Y,YOO D I,SHIN Y,et al.Crystalline structure analysis of cellulose treated with sodium hydroxide and carbon dioxide by means of X-ray diffraction and FTIR spectroscopy[J].Carbohydrate Research,2005,340(15):2376-2391.
[18] 吕惠琳,马邕文,万金泉,等.综纤维素氢键模式的研究[J].中国造纸学报,2011,26(1):1-5.
[2] BRANT A,RAY M J,TO T Q,et al.Ionic liquid pretreatment of lignocellulosic biomass with ionic liquid-water mixtures[J].Green Chemistry,2011,13(9):2489-2499.
[3] FU D B,MAZZA G.Optimization of processing conditions for the pretreatment of wheat straw using aqueous ionic liquid[J].Bioresource Technology,2011,102(17):8003-8010.
[4] BRANDT A,J GR?SVIK,HALLETT J P,et al.Deconstruction of lignocellulosic biomass with ionic liquids[J].Green Chemistry,2013,15(3):550-583.
[5] 王琳琳,魏立纲,王艳涛,等.离子液体-水体系下微波辅助脱木质素研究[J].大连工业大学学报,2015,34(6):441-444.
[6] MAZZA M,CATANA D A,VACA-GARCIA C,et al.Influence of water on the dissolution of cellulose in selected ionic liquids[J].Cellulose,2009,16(2):207-215.
[7] BHARGAVA B L,YASAKA Y,KLEIN M L.Computational studies of room temperature ionic liquid-water mixtures[J].Chemical Communication,2011,47(22):6228-6241.
[8] IGUCHI M,AIDA T M,WATANABE M,et al.Dissolution and recovery of cellulose from 1-butyl-3-methylimidazolium chloride in presence of water[J].Carbohydrate Polymers,2013,92(1):651-658.
[9] OLSSON C,IDSTR?M A,NORDSTIERNA L,et al.Influence of water on swelling and dissolution of cellulose in 1-ethyl-3-methylimidazolium acetate[J].Carbohydrate Polymers,2014,99(1):438-446.
[10] SHI J,BALAMURUGAN K,PARTHASARATHI R,et al.Understanding the role of water during ionic liquid pretreatment of lignocellulose:co-solvent or anti-solvent[J].Green Chemistry,2014,16(8):3830-3840 .
[11] WEI L G,LI K L,MA Y C,et al.Dissolving lignocellulosic biomass in a 1-butyl-3-methylimidazolium chloride-water mixture[J].Industrial Crops & Products,2012,37(1):227-234.
[12] HOU X D,LI N,ZONG M H.Significantly enhancing enzymatic hydrolysis of rice straw after pretreatment using renewable ionic liquid-water mixtures[J].Bioresource Technology,2013,136(12):469-474.
[13] PRONYK C,MAZZA G.Optimization of processing conditions for the fractionation of triticale straw using pressurized low polarity water[J].Bioresource Technology,2011,102(2):2016-2025.
[14] 王琳琳,魏立纲,马英冲,等.1-丁基-3-甲基咪唑氯盐离子液体水溶液对纤维素的作用[J].化工学报,2015,66(S1):32-37.
[15] MANSIKKAM?KI P,LAHTINEN M,RISSANEN K.Structural changes of cellulose crystallites induced by mercerisation in different solvent systems;determined by powder X-ray diffraction method[J].Cellulose,2005,12(3):233-242.
[16] NISHIYA Y,LANGAN P,CHANZY H.Crystal structure and hydrogen-bonding system in cellulose Iβ from synchrotron X-ray and neutron fiber diffraction[J].Journal of American Chemistry Society,2002,124(31):9074-9082.
[17] OH S Y,YOO D I,SHIN Y,et al.Crystalline structure analysis of cellulose treated with sodium hydroxide and carbon dioxide by means of X-ray diffraction and FTIR spectroscopy[J].Carbohydrate Research,2005,340(15):2376-2391.
[18] 吕惠琳,马邕文,万金泉,等.综纤维素氢键模式的研究[J].中国造纸学报,2011,26(1):1-5.