Mechanical Energy Absorption of Pectin Films

Mathematics – Logic

Scientific paper

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Deformation And Flow, Material Behavior, Mechanical Properties Of Solids

Scientific paper

Pectin film samples were prepared from HM, LM and amidated pectins produced by CP Kelco and Danisco, with acidic and enzymatic de-esterification and amidation. The swelling of samples were indicated by hydration before the experiments for 24 h by PEG20000 solution, on known osmotic pressure, with Ca, Mg and K ions with different concentrations. Mechanical tests were followed by Stable Micro Systems penetrometer, with stress-relaxation method, in elastic deformation section. Results show, that the energy absorption depends on the pectin type, on the hydration and the ion concentration. Based on this type experiments it is possible to choose the best pectin type for different uses - as a packaging material in different occasions, or modeling pectin changes during physiological changing in the cell-wall etc.

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