| 乳酸介质中麦草浆纤维素的降解及其结构的变化 |
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| 引用本文： | 窦圆圆,李小保,叶菊娣,高勤卫,朱丽琰,洪建国. 乳酸介质中麦草浆纤维素的降解及其结构的变化[J]. 安徽农业科学, 2010, 38(27): 15449-15452 |
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| 作者姓名： | 窦圆圆 李小保 叶菊娣 高勤卫 朱丽琰 洪建国 |
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| 作者单位： | 南京林业大学,江苏南京,210037 |
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| 摘 要： | [目的]为利用纤维素制备热塑性高分子材料提供依据。[方法]在一定温度下,将预处理后的原料（干燥麦草浆）浸入一定量的乳酸中,搅拌一定时间后干燥至恒重,研究温度、时间对纤维素聚合度和碘吸附值的影响,并分析麦草浆纤维素在乳酸介质中化学结构的变化。[结果]温度高于30℃时,纤维素开始降解,且温度越高,纤维素降解越剧烈。温度和搅拌时间对纤维素聚合度和碘吸附值的影响较大,而乳酸用量对其影响较小。红外谱图和X-衍射图谱分析结果表明,60℃之前,麦草浆在乳酸介质中主要发生物理溶胀和少量的降解;超过70℃后,麦草浆除发生降解外,还可能伴随着化学反应,但纤维素的晶型未发生改变。[结论]该研究为纤维素在乳酸介质中的改性提供了资料。
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| 关 键 词： | 麦草浆 R-18值 碘吸附值 聚合度 红外谱图 |
Degradation and Structural Changes of Wheat Straw Pulp Cellulose In Lactic Acid Medium |
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| DOU Yuan-yuan et al. Degradation and Structural Changes of Wheat Straw Pulp Cellulose In Lactic Acid Medium[J]. Journal of Anhui Agricultural Sciences, 2010, 38(27): 15449-15452 |
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| Authors: | DOU Yuan-yuan et al |
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| Affiliation: | DOU Yuan-yuan et al(Nanjing Forestry University,Nanjing,Jiangsu 210037) |
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| Abstract: | [Objective] The study was to provide the basis for preparation of thermoplastic polymer material with cellulose.[Method] The pretreated raw materials(dry wheat straw pulp)were immersed into a certain amount of lactic acid at certain temperature.After stirred for some time,they were dried to constant weight.The effects of temperature,time on polymerization degree and iodine adsorption value of cellulose were studied,and the change of chemical structure of wheat straw cellulose in acid medium was analyzed.[Re... |
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| Keywords: | Wheat straw pulp R-18 value Iodine adsorption value Polymerization degree Infrared spectrum |
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