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TEMPO氧化体系氧化棉纤维的动力学研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2011年02期
Page:
93-98
Column:
研究论文
publishdate:
2011-03-28

Article Info:/Info

Title:
Study on oxidation kinetic of cotton fibers oxidation with TEMPO
Author(s):
DAI Lu DAI Hongqi* YUAN Yangchun ZHU Zhengjun
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, Nanjing Forestry University,Nanjing 210037,China
Keywords:
cotton fibersTEMPO oxidationkineticsactivation energy
Classification number :
O643;TS743
DOI:
10.3969/j.jssn.1000-2006.2011.02.020
Document Code:
A
Abstract:
The oxidation kinetics of the cotton fibers with TEMPO was investigated. The results showed that the oxidation reaction of the cotton fibers by TEMPO/NaClO/NaBr system could be approximately described in two pseudofirstorder reaction kinetics based on the special cellulose structure,namely the dynamics of amorphous and crystall regions. In the concentration range used, the rate constant k was directly proportional to the concentration of TEMPO. As to NaBr,the rate constant was proportional to the concentration in a relatively lower range,but oxidation reaction rate did not increase with concentration of NaBr when its concentration was above 10 mmol/g. The effect of temperature on the rate constant could be well described by Arrhenius equation,the apparent activation energy measured was about 5666 kJ/mol.

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Last Update: 2011-04-13