Carboxymethyl modification of konjac glucomannan affects water binding properties

Man Xiao, Shuhong Dai, Le Wang, Xuewen Ni, Wenli Yan, Yapeng Fang, Harold Corke, Fatang Jiang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


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.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalCarbohydrate Polymers
StatePublished - 19 May 2015
Externally publishedYes


  • Carboxymethyl konjac glucomannan
  • Konjac glucomannan
  • Water adsorption
  • Water binding
  • Water solubility


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