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Citation: HUANG Jin-Feng, WANG Shi-Ming, HUANG Qun-Zeng, LIN Shan, WANG Qiong-Sheng, WAN Qing-Li. Degradation of Chitosan with H₂O₂ Catalyzed by Phosphotungstie Acid[J]. Chinese Journal of Applied Chemistry, ;2006, 23(1): 34-37. shu

Degradation of Chitosan with H₂O₂ Catalyzed by Phosphotungstie Acid

1.
College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007

Corresponding author: WANG Shi-Ming,
Received Date: 19 February 2005
Available Online: 9 September 2005
Fund Project: 福建省自然科学基金资助项目(JB01096) (JB01096)

The heterogeneous degradation of chitosan with hydrogen peroxide under the catalysis of phospho-tungstic acid was studied.The eEEeFts of FonFentration of hydrogen peroxide, reaFtion and time, dosage of catalyst on the degradation are discussed by means of orthogonal tests.The mechanism of the degradation is also discussed.The experimental results show that chitosan can be effectively degraded with hydrogen peroxide under the catalysis of phosphotungstic acid.The optimum reaction conditions are as follows:hydrogen peroxide is 2.7 mol/L,the mass ratio of phosphotungstic acid to chitosan is 0.01, reaction time is 20 min, reaction temperature is 90℃.Water-Soluble chitosan with average molecular weight 12 000 was produced under the experiment condition.
- chitosan,
- phosphotungstic acid,
- hydrogen peroxide,
- catalysis degradation
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Degradation of Chitosan with H₂O₂ Catalyzed by Phosphotungstie Acid