Preparation and Adsorption Properties of Chitosan/Active Clay Composite as Sugar Juice Decolorization Agent

Chitosan/activated clay composite was prepared with chitosan solution and activated clay. With the decolorization ratio of sugar juice as an index, the effects of reaction temperature, reaction time, chitosan dosage and molecular weight on the preparation of chitosan/activated clay composite were in...

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Published inShipin gongye ke-ji Vol. 43; no. 8; pp. 76 - 84
Main Authors Chengdu HUANG, Shuo AI, Chunyou LIU, Xian’e REN, Kunming ZHANG, Yongchun HUANG
Format Journal Article
LanguageChinese
Published The editorial department of Science and Technology of Food Industry 01.04.2022
Subjects
adsorption performance
chitosan/activated clay composites
decolourization ratio
structure characterization
sugar juice decolorization agent
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Summary:Chitosan/activated clay composite was prepared with chitosan solution and activated clay. With the decolorization ratio of sugar juice as an index, the effects of reaction temperature, reaction time, chitosan dosage and molecular weight on the preparation of chitosan/activated clay composite were investigated. The optimum conditions were obtained as follows: temperature 60 ℃, reaction time 7 h, chitosan dosage 2.0 g and molecular weight 2,000,000. The decolorization rate of the composite was up to 96.2%, which was significantly better than 56.7% of activated clay and 42.2% of chitosan. The decolorization rate of the structure of the composite was characterized by scanning electron microscopy, infrared spectroscopy, X-ray diffraction and thermogravimetric analysis. The results showed that chitosan was evenly distributed on the surface of activated clay, forming a more stable composite structure and maintaining the porous structure of activated clay. The thermal stability of the composite was higher than that o
ISSN:1002-0306
DOI:10.13386/j.issn1002-0306.2021070294