| 用^1H—NMR测定纤维素的摩尔取代度 |
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| 引用本文： | 杨绪杰,黄海荣.用^1H—NMR测定纤维素的摩尔取代度[J].南京理工大学学报(自然科学版),1998,22(6):526-528,547. |
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| 作者姓名： | 杨绪杰 黄海荣 |
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| 作者单位： | 南京理工大学化工学院!南京210094 |
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| 摘 要： | 用＾１Ｈ－ＮＭＲ测定羟丙基纤维素的摩尔取代度，根据纤维素在ＤＣｌ中水解后的＾１Ｈ－ＮＭＲ谱峰面积来计算ＭＳ值。同时还应用铬酸氧化蒸馏法测定了羟丙基纤维素的ＭＳ值，以及利用ＭＳ与羟丙基含量的关系得到ＭＳ值，可以发现ＮＭＲ的方法是可行的。
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| 关 键 词： | 纤维素 水解 测定 摩尔取代度 羟丙基纤维素 NMR |
Determination of the Malar Substitution of Hydroxypropyl Cellulose by1~H-NMR |
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| Yang Xujie,Huang Hairong,L iu Xiaoheng,L u L ude,Wang Xin.Determination of the Malar Substitution of Hydroxypropyl Cellulose by1~H-NMR[J].Journal of Nanjing University of Science and Technology(Nature Science),1998,22(6):526-528,547. |
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| Authors: | Yang Xujie Huang Hairong L iu Xiaoheng L u L ude Wang Xin |
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| Abstract: | Measuring the molar substitution (MS) of hydroxypropyl cellulose by proton nuclear magnetic resonance has been established.The procedure for the determination of MS was based on hydrolysis of hydroxypropyl cellulose with deuteriohydrochloric acid and integration of area of the resonance peaks.A chromic acid oxidation distillation method has also been used to measure the MS of hydroxypropyl cellulose.Futhermore,according to the established relation ship between MS and content of hydroxypropyl group(H C) ,the MS of hydroxypropyl cellulose could be calculated. Thus,itis found that the NMR method is feasible. |
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| Keywords: | cellulose hydrolysis nuclear magnetic resonance determination |
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