Gelation behaviour of konjac glucomannan with different molecular weights

Biopolymers
H ZhangI T Norton

Abstract

The deacetylation and gelation of konjac glucomannan (KGM) following alkali addition was investigated by Fourier transform infrared, while the rheological properties of KGM with different molecular weights were studied by dynamic viscoelastic measurements in shear mode and penetration force tests. It was found that gelation occurred after significant deacetylation had taken place. Rheometrical studies revealed that KGM with different molecular weights exhibited different gelation characteristics in small amplitude oscillatory shear flow. For the samples of fractionated KGM with lower molecular weights, a decrease in both the storage shear modulus (G') and loss shear modulus (G") was observed during gelation at temperatures above 75 degrees C. It is suggested that the decrease results from the wall slip between sample and measuring geometry owing to a rapid gelation process with syneresis and/or disentanglement of molecular chains adsorbed on the surface of parallel plates from those located in the bulk. Penetration force tests were employed to confirm the occurrence of slippage and thereby no decreases in rigidity of samples were observed during gelation. For the native KGM samples decreases in G' and G" during gelation were no...Continue Reading

Citations

Jul 19, 2006·Analytical and Bioanalytical Chemistry·Hui-Hong LiuGuo-Lin Zou
Aug 4, 2012·Journal of Agricultural and Food Chemistry·Claudia Ruiz-CapillasFrancisco Jiménez-Colmenero
Feb 5, 2009·Journal of Biomaterials Science. Polymer Edition·Qiujin LiZhimin He
Dec 2, 2011·Marine Drugs·Suphat KorkiatithaweechaiNongnuj Muangsin
Sep 1, 2009·International Journal of Biological Macromolecules·C DelattreP Michaud
Feb 26, 2008·European Journal of Pharmaceutics and Biopharmaceutics : Official Journal of Arbeitsgemeinschaft Für Pharmazeutische Verfahrenstechnik E.V·Felipe Alvarez-ManceñidoRamón Martínez-Pacheco
Dec 24, 2003·Biopolymers·Yapeng Fang, Katsuyoshi Nishinari
Jun 15, 2007·Journal of Biomedical Materials Research. Part a·Gang ZhouJohn A Jansen
May 21, 2008·International Journal of Cosmetic Science·M KunchevaS Dobreva
Nov 16, 2004·Colloids and Surfaces. B, Biointerfaces·Shanjun Gao, Katsuyoshi Nishinari
Nov 29, 2005·Carbohydrate Research·Yang JinKatsuyoshi Nishinari
Jun 10, 2006·Journal of Biochemical and Biophysical Methods·Hui-Hong Liu, Guo-Lin Zou
Sep 27, 2014·Carbohydrate Polymers·Yoko NittaKatsuyoshi Nishinari
May 17, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Bo ZhuBin Li
Apr 10, 2019·Polymers·Carla Giometti FrançaMarisa Masumi Beppu
Oct 13, 2009·Biomacromolecules·Yoko NittaKatsuyoshi Nishinari
Sep 9, 2020·Food Hydrocolloids·Katsuyoshi Nishinari, Yapeng Fang
Nov 12, 2002·Biomacromolecules·Long HuangKatsuyoshi Nishinari
Feb 1, 2007·The Journal of Physical Chemistry. B·Yimei YinKatsuyoshi Nishinari
Nov 15, 2005·Biomacromolecules·Yapeng FangKatsuyoshi Nishinari
Jan 13, 2004·Biomacromolecules·Yapeng FangKatsuyoshi Nishinari
Jan 13, 2004·Biomacromolecules·Shanjun Gao, Katsuyoshi Nishinari
Jan 10, 2006·Biomacromolecules·Jie Cai, Lina Zhang

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