Study of Microwave Enhanced Solid-state Acid Degradation of Chitosan

XU Lei; JIAO Siming; ZHANG Wenchang; CHENG Gong; SUN Jiayan; ZHAO Yan; ZHANG Jinsong

doi:10.13386/j.issn1002-0306.2020040305

Volume 42 Issue 2

Jan. 2021

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Science and Technology of Food Industry > 2021 > 42(2): 6-11. > DOI: 10.13386/j.issn1002-0306.2020040305

XU Lei, JIAO Siming, ZHANG Wenchang, CHENG Gong, SUN Jiayan, ZHAO Yan, ZHANG Jinsong. Study of Microwave Enhanced Solid-state Acid Degradation of Chitosan[J]. Science and Technology of Food Industry, 2021, 42(2): 6-11. DOI: 10.13386/j.issn1002-0306.2020040305

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Study of Microwave Enhanced Solid-state Acid Degradation of Chitosan

1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
2. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

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Received Date: April 25, 2020
Available Online: January 20, 2021

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Abstract

Abstract

Microwave enhanced solid-state acid degradation of chitosan was studied in this paper,the effects of microwave radiation power and hydrochloric acid dosage on the molecular weight of degraded products were analyzed,and their structure was characterized by infrared spectrum and proton nuclear magnetic resonance. The results showed that the increase of microwave radiation power and hydrochloric acid dosage would lead to decreased molecular weight. Low molecular weight chitosan with weight average molecular weight less than 50000 could be obtained by irradiating the solid-state acidification material under microwave for 15 minutes,and the structure of sugar unit remained stable during the reaction. The production capacity of chitooligosaccharide could be increased more than 4 times in unit time by the combination of microwave enhanced solid-state acid degradation and enzyme degradation. In conclusion,this study provided an efficient preparation method of low molecular weight chitosan and chitooligosaccharides based on microwave enhanced solid-state acid degradation technology,which laid a foundation for their various applications.
- chitosan,
- microwave enhancement,
- solid-state acid degradation,
- chitooligosaccharides,
- enzyme degradation

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