| Nitration of Wood Cellulose in HNO_3/Organic Solvent Medium |
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| 作者姓名： | 邵自强 王文俊 王飞俊 王继勋 谭惠民 |
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| 作者单位： | School of Materials Science and Engineering Beijing Institute of Technology，Beijing100081，China，School of Materials Science and Engineering，Beijing Institute of Technology，Beijing100081，China，School of Materials Science and Engineering，Beijing Institute of Technology，Beijing100081，China，School of Materials Science and Engineering，Beijing Institute of Technology，Beijing100081，China，School of Materials Science and Engineering，Beijing Institute of Technology，Beijing100081，China |
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| 基金项目： | theMinisterialLevelAdvancedResearchFoundation(40406030202) |
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| 摘 要： | Wood celluloseis a mainraw material for prepar-ing NC1],there are different reactivities of the threehydroxyl groups in an anhydrogluose unit,in differ-ent positions along molecular chain and within differ-ent points of cellulose samples2].Allowance shouldbe madefor the existenceincellulose of tworegions ofunequal accessibility to reactants.The“amorphous”regionis more or less freely accessible to all the con-stituents of the nitrating bath,and hydroxyl groupshere are esterified without any…
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| 收稿时间： | 2004/5/21 0:00:00 |
Nitration of Wood Cellulose in HNO3/Organic Solvent Medium |
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| SHAO Zi-qiang,WANG Wen-jun,WANG Fei-jun,WANG Ji-xun and TAN Hui-min.Nitration of Wood Cellulose in HNO_3/Organic Solvent Medium[J].Journal of Beijing Institute of Technology,2006,15(1):111-114. |
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| Authors: | SHAO Zi-qiang WANG Wen-jun WANG Fei-jun WANG Ji-xun and TAN Hui-min |
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| Affiliation: | School of Materials Science and Engineering,Beijing Institute of Technology,Beijing100081,China;School of Materials Science and Engineering,Beijing Institute of Technology,Beijing100081,China;School of Materials Science and Engineering,Beijing Institute of Technology,Beijing100081,China;School of Materials Science and Engineering,Beijing Institute of Technology,Beijing100081,China;School of Materials Science and Engineering,Beijing Institute of Technology,Beijing100081,China |
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| Abstract: | A steam explosion pretreatment at various severities was applied to pure wood cellulose; the influences of steam pretreatment on the morphological structure, the hydrophilic property and viscosity-average molecular weight of cellulose were evaluated. The nitration of steam-exploded cellulose was carried out in the nitrating agent medium (HNO_3/organic solvent). The performance indexes of nitrocellulose, prepared from original and steam exploded samples, were determined by using the polarized optical microscope. The results show that after pretreatment the reactivity of the three hydroxyl groups in anhydroglucose unit of cellulose is improved, and the nitrogen content and the uniformity of NC from steam exploded cellulose observably increas. |
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| Keywords: | nitrocellulose wood cellulose nitrogen content uniformity |
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