Carboxymethyl modification of konjac glucomannan affects water binding properties. (5th October 2015)

• Record Type: Journal Article
• Authors: Xiao, Man; Dai, Shuhong; Wang, Le; Ni, Xuewen; Yan, Wenli; Fang, Yapeng; Corke, Harold; Jiang, Fatang
• Is Part Of: Carbohydrate polymers. Volume 130(2015)
• Page Start: 1
• Page End: 8
• Publication Date: 2015-10-05
• Subjects: KGM konjac glucomannan -- CMKGM carboxymethyl konjac glucomannan -- DS degree of substitution -- DD degree of deacetylation -- RH relative humiditym -- DVS dynamic vapor sorption -- XRD X-ray diffraction -- SEM scanning electron microscopy -- AFM atomic force microscopy; Konjac glucomannan -- Carboxymethyl konjac glucomannan -- Water binding -- Water adsorption -- Water solubility; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2015.05.001
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Carboxymethylation of KGM decreased the water adsorption. Carboxymethylation of KGM reduced the water absorption and solubility. Both carboxymethylation and deacetylation could confer hydrophobicity for CMKGM. Abstract: The water binding properties of konjac glucomannan (KGM) and carboxymethyl konjac glucomannan (CMKGM) are important for their application in food, pharmaceutical, and chemical engineering fields. The equilibrium moisture content of CMKGM was lower than that of KGM at the relative humidity in the range 30–95% at 25 °C. The water absorption and solubility of CMKGM in water solution were lower than that of KGM at 25 °C. Carboxymethyl modification of KGM reduces the water adsorption, absorption, and solubility. Both carboxymethylation and deacetylation could confer hydrophobicity for CMKGM. These data provide the basis for expanding CMKGM application.