title: Physical stability and rheological properties of konjac glucomannan-ethyl cellulose mixed emulsions.
abstract: Konjac glucomannan (KGM)/ethyl cellulose (EC) could form a stable homogeneous emulsion with appropriate mixing formula. This study aimed to investigate the stable mechanism of KGM/EC emulsion at different mixing ratio through its rheological properties, and droplet size and morphology changes with up to 6days storage time. Though emulsions samples with high KGM content had larger droplet size and worse uniformity at the fresh stage, they appeared to be more stable and droplets growth rate were slow during storage. Aggregation and morphology of droplets could be observed under confocal microscopy. Shear-thinning behavior were found in mixed emulsions, and mainly accredited to the KGM component. The effect of temperature on viscosities of the emulsions was well-described by Arrhenius equation. Increased KGM content led to larger storage modulus (G') and loss modulus (G″), and the difference in cross-over point of G' and G″ implied changes in microstructures of the emulsions.
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China.
authors.forename: Xuewen
authors.initials: X
authors.lastname: Ni
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China.
authors.forename: Wenjie
authors.initials: W
authors.lastname: Chen
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China.
authors.forename: Man
authors.initials: M
authors.lastname: Xiao
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China.
authors.forename: Kao
authors.initials: K
authors.lastname: Wu
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Kuang
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China; School of Biological Sciences, The University of Hong Kong, Hong Kong, China.
authors.forename: Harold
authors.initials: H
authors.lastname: Corke
authors.affiliation: Glyn O. Philips Hydrocolloid Research Centre at HUT, Hubei University of Technology, Wuhan 430068, China. Electronic address: JIANGFT@mail.hbut.edu.cn.
authors.forename: Fatang
authors.initials: F
authors.lastname: Jiang
mesh_terms: D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D004655:Emulsions / Q000737:chemistry*; D008351:Mannans / Q000737:chemistry*; D010316:Particle Size; D044367:Phase Transition; D012212:Rheology; D014783:Viscosity
chemical_list: D004655:Emulsions; D008351:Mannans; C022901:(1-6)-alpha-glucomannan; C013517:ethyl cellulose; D002482:Cellulose
keywords: droplet morphology; phase separation; rheological properties