EFFECT OF TEMPO OXIDATION SYSTEM ON KINETIC CONSTANTS OF COTTON FIBERS

摘要：

The kinetics of the TEMPO-mediated oxidation of cotton fibers has been studied. It was revealed that the oxidation reaction of the cotton fibers by TEMPO/NaBr/NaClO system can be approximately described as two pseudo-first-order reaction kinetics which based on the cellulose structures, namely the kinetic process of the amorphous region and the crystalline region. In the concentration range used in this study, 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 while it tended to level off at higher concentration, but the oxidation reaction rate increased with concentration when the concentration was above 1.0 mmol/g. The effect of temperature on the rate constant could be well described by the Arrhenius equation, for which the apparent activation energy measured was about 56.66 kJ/mol.

关键词： cotton fibers TEMPO oxidation kinetic activation energy

作者: Lu Dai Hongqi Dai Yangchun Yuan Xuan Sun Zhengjun Zhu

作者单位: Jiangsu Province Key Lab of Pulp and Paper Science of Nanjing Forestry University, Nanjing, 210037, China

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 461-466

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）