CELLULOSE DIALDEHYDE - COMPARISON OF THE METHODS OF DETERMINATION

被引：0
|
作者：
TIHLARIK, K
PASTEKA, M
机构：
来源：
CELLULOSE CHEMISTRY AND TECHNOLOGY | 1993年 / 27卷 / 03期
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中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
The three methods currently used for the determination of aldehyde groups in dialdehyde cellulose (reaction with NH2OH - HCl, oxidation by alkaline iodine and reduction with NaBH4) were compared. The phenomenon of ''ageing'' of cellulose dialdehyde was observed ; depending upon the lenght of storage time decrease of effective present, determinable aldehyde groups were found (using the NH2OH . HCl method till 11% during two months). Decrease of determinable aldehyde groups in cellulose dialdehyde is reversible. Practically, the original values could be reached after heating up the aqueous suspension of the samples for a definite time.
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页码：267 / 271
页数：5
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