加热方式对离子液体溶解纤维素过程的影响分析
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摘要
本文采用1-烯丙基-3-甲基咪唑氯盐([Amim]Cl)离子液体对竹纤维素桨粕进行溶解,故需先合成[Amim]Cl离子液体。采用油浴和水浴两种加热办法在相同温度下用[Amim]Cl离子液体去溶解竹纤维素桨粕,比较竹纤维素桨粕在[Amim]Cl离子液体中的溶解速率及溶解度。用去离子水将溶解后的竹纤维素桨粕进行再生,使用红外光谱比较再生前后竹纤维素桨粕的官能团。实验结果显示,油浴加热时竹纤维素桨粕溶解速率及溶解度要高于水浴加热时溶解速率及溶解度。通过红外表征分析得到溶解前后的竹纤维素在官能团上没有发生变化,说明该过程为物理变化。
In this paper,1-ally-l-3-methyl imidazolium chloride([Amim]Cl) ionic liquid was used to dissolve bamboo Cellulose pulp.Two kinds of heating methods,oil bath and water bath,were used to dissolve bamboo Cellulose paddle with [Amim]Cl ionic liquid at the same temperature.The dissolution rate and solubility of bamboo Cellulose paddle in [Amim]Cl ionic liquid were compared.The dissolved bamboo Cellulose pulp was regenerated by deionized water,and the functional groups of bamboo Cellulose pulp before and after regeneration were compared by infrared spectroscopy.The experimental results show that the dissolution rate and solubility of bamboo Cellulose pulp are higher than that of water bath heating when oil bath heating.Through infrared characterization analysis,the bamboo Cellulose before and after dissolution did not change in functional groups,indicating that the process was physical change.
In this paper,1-ally-l-3-methyl imidazolium chloride([Amim]Cl) ionic liquid was used to dissolve bamboo Cellulose pulp.Two kinds of heating methods,oil bath and water bath,were used to dissolve bamboo Cellulose paddle with [Amim]Cl ionic liquid at the same temperature.The dissolution rate and solubility of bamboo Cellulose paddle in [Amim]Cl ionic liquid were compared.The dissolved bamboo Cellulose pulp was regenerated by deionized water,and the functional groups of bamboo Cellulose pulp before and after regeneration were compared by infrared spectroscopy.The experimental results show that the dissolution rate and solubility of bamboo Cellulose pulp are higher than that of water bath heating when oil bath heating.Through infrared characterization analysis,the bamboo Cellulose before and after dissolution did not change in functional groups,indicating that the process was physical change.
引文
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[2]翟蔚,陈洪章,马润宇.离子液体中纤维素的溶解及再生特性[J].北京化工大学学报(自然科学版),2007,34(2):138-141.
[3]石锦志,李状,廖兵,等.离子液体[bmim]Cl对甘蔗渣中纤维素的溶解与再生[J].化工进展,2010,29(11):2183-2186.
[4]Huang Y Z,Hua H X,Li S G,et al.Contact and fumigant toxicities of calamusenone isolated from Acorus gramineus,rhizome against adults of Sitophilus zeamais,and Rhizopertha dominica[J].Insect Science,2011,18(2):181-188.
[5]陈传祥,陶伟娜,王少君,等.离子液体[Amim]Cl中玉米秸秆纤维素的溶解再生性能[J].大连工业大学学报,2013(2):104-107.
[6]许日鹏,江成真,高绍丰.离子液体[Amim]Cl中纤维素的溶解性能及纤维素再生成膜[J].人造纤维,2013,43(4):2-5.
[7]郭立颖,史铁钧,李忠,等.两种咪唑类离子液体对杉木粉的溶解性能[J].化工学报,2008,59(5):1299-1304.
[8]刘振,孙海红,郝静静.离子液体对玉米秸秆组分的溶解选择性[J].可再生能源,2014,32(6):871-875.
[9]王美玲,臧洪俊,蔡白雪,等.纤维素在离子液体[AMMor]Cl/[AMIM]Cl混合溶剂中的溶解性能[J].高等学校化学学报,2009,30(7):1469-1472.
[10]Swatloski R P,Spear S K,Holbrey J D,et al.Ionic liquids:New solvents for non-derivitized cellulose dissolution[J].Abstracts of Papers of the American Chemical Society,2002,224:076-IEC.
[11]刘仕伟,周红霞,李露,等.微波辅助离子液体溶解木质素的研究[J].林产化学与工业,2014,34(5):41-46.