title: Enhancement of Gleditsia sinensis gum rheological properties with pressure cell treatment in semi-solid state.
abstract: The apparent viscosity, molecular weight, and molecular weight distribution are important physical properties that determine the functional properties of galactomannan gum. Gleditsia sinensis gum (GSG) in semi-solid state was pressure cell treated over a range of temperature (30-110 °C) under nitrogen maintained at a pressure of 1.0-4.0 MPa. Physicochemical properties of GSG samples both before and after the pressure cell treatment were characterized. These include measurements of rheological properties by LVDV-III Ultra Rheometer, molecular weight and radius of gyration by light scattering, and changes in surface morphology by scanning electron microscopy. GSG had the highest apparent viscosity at a treatment temperature of 30 °C; further increase in temperature led to decrease in apparent viscosity. The apparent viscosity of GSG can be efficiently improved at room temperature and low pressure. The process of pressure cell treatment of GSG in semi-solid state could be industrialized for enhancement of rheological properties of galactomannan gum.
authors.affiliation: Department of Chemistry and Chemical Engineering, Beijing Forestry University, Beijing 100083, China.
authors.forename: Zi-yuan
authors.initials: ZY
authors.lastname: Zhou
authors.affiliation: Department of Chemistry and Chemical Engineering, Beijing Forestry University, Beijing 100083, China.
authors.forename: Wei-an
authors.initials: WA
authors.lastname: Zhang
authors.affiliation: Department of Chemistry and Chemical Engineering, Beijing Forestry University, Beijing 100083, China.
authors.forename: Jiu-fang
authors.initials: JF
authors.lastname: Duan
authors.affiliation: Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, China.
authors.forename: Wei-ming
authors.initials: WM
authors.lastname: Zhang
authors.affiliation: Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, China.
authors.forename: Da-feng
authors.initials: DF
authors.lastname: Sun
authors.affiliation: Department of Chemistry and Chemical Engineering, Beijing Forestry University, Beijing 100083, China. Electronic address: jiangjx2004@hotmail.com.
authors.forename: Jian-xin
authors.initials: JX
authors.lastname: Jiang
mesh_terms: D031501:Gleditsia / Q000737:chemistry*; D055595:Mechanical Phenomena; D008970:Molecular Weight; D053149:Plant Gums / Q000737:chemistry*; D012212:Rheology; D012995:Solubility; D014783:Viscosity
chemical_list: D053149:Plant Gums
keywords: Gleditsia sinensis gum; Pressure cell process; Rheological properties