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Citation: XIN Mei-Hua, LI Ming-Chun, LAN Xin-Ren. Preparation of N-Alkyl Chitosan via Phase Transfer Catalysis under Microwave Irradiation[J]. Chinese Journal of Applied Chemistry, ;2005, 22(12): 1357-1359. shu

Preparation of N-Alkyl Chitosan via Phase Transfer Catalysis under Microwave Irradiation

1.
College of Material Science and Engineering, Huaqiao University, Quanzhou 362021

Corresponding author: XIN Mei-Hua,
Received Date: 28 December 2004
Available Online: 25 May 2005
Fund Project: 国家自然科学基金资助项目(20274013) (20274013)福建省自然科学基金资助项目(E0110027和C0310009) (E0110027和C0310009)福建省重大科技项目(2002I004) (2002I004)

N-alkyl chitosan was prepared by reducing a schiff base formed from chitosan and lauraldehyde,and microwave irradiation was applied to the preparation of N-alkyl chitosan.The effects of microwave power,irradiation time,amount of catalyst,and n(chitosan)/n(aldhyde) ratio on the degree of alkylation substitution of chitosan were studied.The modified chitosan was characterized by FTIR and EA.The substitution degree of the modified chitosan can reach 94% under the following reaction conditions:560 W microwave power,3 min reaction time,reactant ratio(n(chitosan)/n(lauraldehyde)) of 1:2.6,and molar ratio of SDS to lauraldehyde being 0.15:1. Compared to ordinary reactions,the preparation of N-alkyl chitosan by microwave irradiation can be finished within very short reaction time.
- chitosan,
- alkylation,
- microwave irradiation,
- phase transfer catalysis
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