| 羟丙基甲基纤维素与魔芋葡甘聚糖复配体系相互作用的研究 |
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| 引用本文： | 李博,邵自强.羟丙基甲基纤维素与魔芋葡甘聚糖复配体系相互作用的研究[J].高分子学报,2010,0(4):395-400. |
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| 作者姓名： | 李博 邵自强 |
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| 作者单位： | 北京理工大学材料科学与工程学院,北京,100081 |
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| 摘 要： | 采用黏度测试、振荡测试以及动态力学分析方法,以结构典型的羟烷基烷基纤维素醚———羟丙基甲基纤维素(HPMC)与魔芋葡甘聚糖(KGM)混合体系为研究对象,通过对两种天然多糖混合水溶液表观黏度、流变性及溶液动态力学参数的变化,分析了结构差异性天然多糖大分子间相互作用的机理并建立分子模型.实验表明,HPMC-KGM复配后,KGM分子链上未被取代的甘露糖单元与HPMC分子链上憎水性基团通过疏水作用形成弱交联的疏水缔合区域,而形成以HPMC分子为骨架并与KGM分子相联结的结构.HPMC与KGM按质量比3∶1到1∶1比例范围内复配效应最为明显.通过疏水缔合作用,缓解KGM分子在高温条件下的降解,还对HPMC的热凝胶化作用起到延缓效果.
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| 关 键 词： | HPMC-KGM复配体系 疏水缔合 热凝胶 氢键 相互作用 |
| 收稿时间： | 2009-03-19 |
STUDIES ON INTERACTION OF HYDROXYPROPYLMETHYL CELLULOSE AND KONJAC GLUCOMANNAN MIXED SYSTEMS |
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| LI Bo,SHAO Ziqiang.STUDIES ON INTERACTION OF HYDROXYPROPYLMETHYL CELLULOSE AND KONJAC GLUCOMANNAN MIXED SYSTEMS[J].Acta Polymerica Sinica,2010,0(4):395-400. |
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| Authors: | LI Bo SHAO Ziqiang |
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| Institution: | Materials Science and Engineering Department;Beijing Institute of Technology;Beijing 100081 |
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| Abstract: | Aiming at the synergistic effects between cellulose ethers and other polysaccharides, hydroxypropylmethyl cellulose (HPMC) and konjac glucomannan (KGM) mixed systems in aqueous medium were studied. Dynamic mechanical analysis (DMA),viscosity and oscillatory measurements were employed to analyze the mechanism of interactions with a molecular structure model proposed. Viscosity measurements revealed the negative synergistic viscosity effects of HPMC-KGM systems,by reason of brokenness of inter-and intra- hydr... |
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| Keywords: | HPMC-KGM mixed system Hydrophobic association Thermal gelation Hydrogen bonding Interaction |
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