[1]蒋彩云,黄春香,邓照西,等.醋酸丁酸纤维素的酯化及动力学[J].常州大学学报(自然科学版),2009,(01):15-17.
　JIANG Cai -yun,H UANG Chun -xiang,DENG Zhao -xi,et al.Study of the Synthesis and Kinetics of Cellulose Acetate Butyrate[J].Journal of Changzhou University(Natural Science Edition),2009,(01):15-17.
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醋酸丁酸纤维素的酯化及动力学()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
期数:
2009年01期
页码:
15-17
栏目:
出版日期:
2009-03-25

文章信息/Info

Title:
Study of the Synthesis and Kinetics of Cellulose Acetate Butyrate
作者:
蒋彩云;  黄春香;  邓照西;  冷一欣
江苏工业学院化学化工学院, 江苏 常州 213164
Author(s):
JIANG Cai -yun ;  H UANG Chun -xiang ;  DENG Zhao -xi ;  LENG Yi -xin
School of Chemist ry and Chemical Engineering , Jiangsu Polytechnic University , Changzhou 213164 , China
关键词:
纤维素; 酯化; 醋酸丁酸纤维素; 动力学
Keywords:
cellulose ; este rify ; cellulose acetate buty rate ; kinet ics
分类号:
TQ 352.7 　
文献标志码:
A
摘要:
采用硫酸为催化剂, 用正交实验研究了醋酸丁酸纤维素的酯化反应, 通过测定其酰基含量分析酯化反应的程度, 探讨了 酯化反应动力学, 并建立了动力学方程。实验得到C AB-381 的最佳工艺条件为:10 g 精制短棉绒恒温活化12 h , V (正丁酸) ∶V (乙酐) =5 ∶1 , 70 ℃反应1.5 h , 水解1 h ;实验结果表明, 醋酸丁酸纤维素的酯化表现为一级连串反应, 在本实验条件 下, 反应的表观活化能Ea =7.92 kJ/ mol , 表观反应速率常数k′=7.31 ×10 -5e -7 920/RT (s -1)。
Abstract:
The esterification of cellulo se aceta te butyrate w as studied using the metho d of o rthog onal design w ith sulphuric acid as cataly st .The content of acetyl and buty ryl was analyzed according to American S tandard Testing Method , and the kine tics of the reactio n w as also discussed here .The result s showed that the best react ion co ndi tions w ere :10 g cellulo se w as pret reated for about 12 h unde r constant tempera ture , the vo lume ratio of buty ric acid and acetic anhy dride w as 5 ∶1 , the reactio n time w as 1.5 h and the temperature w as 70 ℃, then hydroly sis for about 1 h .Based on the ex perimental data , the rate constant k of A rrehnius equation w as determined , the apparent act ivatio n energy w as Ea =7.92 kJ/mol , the f requency facto r w as k′=7.31 ×10-5e-7 920/ RT (s-1)and the kinetic equation w as tested by experiment .

参考文献/References:

[1] 李峰.我国醋酸丁酸纤维素应用与推广前景[M] .北京:中 国化工信息中心, 1995:5 -7 .
[2] AS TM Comm it tee.D 817 -96 s tandard t est meth ods of t es ting cellul ose acet ate propionat e and cellulose acet ate bu ty rat e ∥Ameri can S ociet y for Tes ting and Material s [S] .Pennsylvania : AS TM , 2004 .
[3] 许东生. 纤维素衍生物[M] . 北京:化学工业出版社, 2001 :61 -72 .
[4] 郭汉贤. 应用化工动力学[M] . 北京:化学工业出版社, 2003 :13 -70 .

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备注/Memo

备注/Memo:
作者简介:蒋彩云(1982 -), 女, 江苏泰兴人, 硕士;联系人:冷一欣。
更新日期/Last Update: 2009-03-25