Mechanical properties of gelatin-rich micro-particles
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Mechanical properties of gelatin-rich micro-particles. / Ding, Ping; Norton, Ian; Zhang, Zhibing; Pacek, Andrzej.
In: Journal of Food Engineering, Vol. 86, No. 3, 01.06.2008, p. 307-314.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Mechanical properties of gelatin-rich micro-particles
AU - Ding, Ping
AU - Norton, Ian
AU - Zhang, Zhibing
AU - Pacek, Andrzej
PY - 2008/6/1
Y1 - 2008/6/1
N2 - Effect of chemical composition and applied strain on mechanical properties of gelled gelatin-rich micro-particles resulting from phase separated gelatin/pullulan mixtures has been investigated. The mechanical properties of micro-particles(20-120 mu m) were measured using a micromanipulation technique. The compress-release tests revealed that at a low deformation (up to 0% strain) particles are fully elastic with Young's modulus proportional to the concentration of gelatin and at the higher deformation (up to 50-80%) particles are visco-elastic. Even at very high load resulting in 50-60% deformation, no fracture of particles was observed and after the load was removed, particles recovered to a fully spherical shape. The visco-clastic behaviour was investigated by a stress-relaxation method, where force relaxation at constant deformation was measured as a function of time. The experimental results were analysed using a standard liner model of visco-clastic solids and the parameters of this model were related to the composition of gelled particles. (C) 2007 Elsevier Ltd. All rights reserved.
AB - Effect of chemical composition and applied strain on mechanical properties of gelled gelatin-rich micro-particles resulting from phase separated gelatin/pullulan mixtures has been investigated. The mechanical properties of micro-particles(20-120 mu m) were measured using a micromanipulation technique. The compress-release tests revealed that at a low deformation (up to 0% strain) particles are fully elastic with Young's modulus proportional to the concentration of gelatin and at the higher deformation (up to 50-80%) particles are visco-elastic. Even at very high load resulting in 50-60% deformation, no fracture of particles was observed and after the load was removed, particles recovered to a fully spherical shape. The visco-clastic behaviour was investigated by a stress-relaxation method, where force relaxation at constant deformation was measured as a function of time. The experimental results were analysed using a standard liner model of visco-clastic solids and the parameters of this model were related to the composition of gelled particles. (C) 2007 Elsevier Ltd. All rights reserved.
KW - standard linear model
KW - gelled micro-particles
KW - mechanical properties
KW - gelatin-rich phase
U2 - 10.1016/j.jfoodeng.2007.03.024
DO - 10.1016/j.jfoodeng.2007.03.024
M3 - Article
VL - 86
SP - 307
EP - 314
JO - Journal of Food Engineering
JF - Journal of Food Engineering
SN - 0260-8774
IS - 3
ER -