title: Carboxymethyl modification of konjac glucomannan affects water binding properties.
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.
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China.
authors.forename: Man
authors.initials: M
authors.lastname: Xiao
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China.
authors.forename: Shuhong
authors.initials: S
authors.lastname: Dai
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China.
authors.forename: Le
authors.initials: L
authors.lastname: Wang
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China.
authors.forename: Xuewen
authors.initials: X
authors.lastname: Ni
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China.
authors.forename: Wenli
authors.initials: W
authors.lastname: Yan
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China; Glyn O. Philips Hydrocolloid Research Centre, Glyndwr University, Plas Coch, Mold Road, Wrexham, LL11 2AW, United Kingdom.
authors.forename: Yapeng
authors.initials: Y
authors.lastname: Fang
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China; School of Biological Sciences, The University of Hong Kong, Hong Kong, PR China.
authors.forename: Harold
authors.initials: H
authors.lastname: Corke
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre, Hubei University of Technology, Wuhan, 430068, PR China. Electronic address: JIANGFT@mail.hbut.edu.cn.
authors.forename: Fatang
authors.initials: F
authors.lastname: Jiang
mesh_terms: D000107:Acetylation; D000327:Adsorption; D057927:Hydrophobic and Hydrophilic Interactions; D008351:Mannans / Q000737:chemistry* / Q000378:metabolism*; D012995:Solubility; D014867:Water / Q000378:metabolism; D014961:X-Ray Diffraction
chemical_list: D008351:Mannans; C538690:carboxymethyl konjac glucomannan; D014867:Water; C022901:(1-6)-alpha-glucomannan
keywords: Carboxymethyl konjac glucomannan; Konjac glucomannan; Water adsorption; Water binding; Water solubility