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羧甲基纤维素水凝胶生物降解动力学研究
引用本文:聂华荣,柳明珠,陈振斌.羧甲基纤维素水凝胶生物降解动力学研究[J].物理化学学报,2004,20(4):386-390.
作者姓名:聂华荣  柳明珠  陈振斌
作者单位:College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000;Department of Chemistry, Hexi College, Zhangye 734000
基金项目:教育部博士点专项基金(20030730013)资助项目~~
摘    要:用氯化铝对羧甲基纤维素进行交联,制得了水凝胶.考察了底物浓度、酶浓度以及降解温度对该水凝胶降解速率的影响,探讨了酶降解动力学及“表观”活化能对酶浓度的依赖关系.结果表明,该酶促反应最佳温度为37 ℃,降解反应对底物浓度和酶浓度的反应级数分别为1级和1.2级;得到了与传统的Michaelis-Menten动力学机制不同的非均相酶促反应动力学模型,确定了“表观”活化能与酶浓度之间的定量关系.

关 键 词:羧甲基纤维素(CMC)  水凝胶  生物降解  动力学  
收稿时间:2003-10-06
修稿时间:2003年10月6日

Kinetic Study on Bio-degradation of Carboxymethylcellulose Hydrogel
Nie Hua-Rong Liu Ming-Zhu Chen Zhen-Bin.Kinetic Study on Bio-degradation of Carboxymethylcellulose Hydrogel[J].Acta Physico-Chimica Sinica,2004,20(4):386-390.
Authors:Nie Hua-Rong Liu Ming-Zhu Chen Zhen-Bin
Institution:College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000;Department of Chemistry, Hexi College, Zhangye 734000
Abstract:Carboxymethylcellulose(CMC) hydrogels have attracted attention as biodegradation absorbent materials in agriculture and forestry. It is important to investigate the biodegradation behavior and kinetics of the bio-degradable reaction. In this paper, CMC hydrogel was prepared by crosslinking with aluminum chloride. The effects of the substrate concentration, enzyme concentration and reaction temperature on the degradation rates were investigated. At the same time, the kinetics of the enzymatic degradation and the relationship between the apparent-activation energy and enzyme concentration were also discussed in detail. The results showed that the optimal temperature for the enzymatic reaction was 37 ℃.The reaction orders for the substrate and enzyme were 1 and 1.2, respectively. A new kinetic model for CMC hydrogel heterogeneous degradation was proposed which was different from the traditional Michaelis-Menten kinetics. The relationship between the apparent-activation energy and the enzyme concentration was also established.
Keywords:Carboxymethylcellulose(CMC)  Hydrogel  Bio-degradation  Kinetics
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