Viscoelastic properties of xanthan gum hydrogels annealed in the sol state |
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| Authors: | T Iseki M Takahashi H Hattori T Hatakeyama H Hatakeyama |
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| Affiliation: | 1. Department of Fine Materials Engineering, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano 386-8567, Japan;2. Department of Textile Science, Faculty of Home Economics, Otsuma Women''s University, 12 Sanbancho, Chiyoda-ku, Tokyo 102-8357, Japan;3. Department of Applied Physics and Chemistry, Faculty of Engineering, Fukui University of Technology, 3-6-1, Gakuen, Fukui 910-8505, Japan;1. Department of Food, Nutrition and Health, College of Food and Agriculture, United Arab Emirates University, PO Box 15551, Al Ain, United Arab Emirates;2. Department of Physics, College of Science, United Arab Emirates University, PO Box 15551, Al Ain, United Arab Emirates;3. Department of Food Science and Technology, Faculty of Agro and Bio Industry, Thaksin University, Phatthalung Campus, Phatthalung, 93210, Thailand;2. Wexner Medical Center, The Ohio State University, Columbus, OH, USA;3. Department of Surgery, Division of Cardiac Surgery, Wexner Medical Center, The Ohio State University, Columbus, OH, USA;1. Geotechnical Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang 411-712, Republic of Korea;2. Global Procurement Center, Samsung C&T Engineering & Construction Group, Seoul 137-956, Republic of Korea;3. Dept. Civil and Environmental Eng., Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea |
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| Abstract: | Viscoelastic properties of xanthan gum aqueous solutions and hydrogels were investigated using a cone-plate type rheometer. The change of viscoelasticity during annealing the solution and cooling to gelation temperature was examined as functions of annealing time, temperature and frequencies. In the annealing process, the storage modulus G′ increases with increasing annealing time. In the subsequent cooling process, G′ of the annealed solution increased, whereas the G′ of non-annealed solution remained almost constant. G′ of hydrogels increased with the increase of annealing temperature and concentration. Based on the experimental results obtained, the structural change of the solution in the annealing process and the structure of gels were investigated. |
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| Keywords: | Xanthan gum Hydrogel Viscoelastic properties Annealing |
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