The Rheology of Gelatin

Relative viscosity and concentration

“…Compared with sedimentation volume measurements of 0.50 to 0.60, the rheological packing density then was somewhat less dense. Introducing a flow curve formula with a linear relation between log V and D -1/2, the following general formula was proposed, containing the medium viscosity too k.c + A(1--s.c) [160] log ~r = 1--s'c k'e ' with A --al 9 c ~]o Dl J~ (an --C) " [161] For polymers the formula has not yet found favor. With structured suspensions Rysavy (271) found it to be valid too for aggregated systems, with varying k-vMues.…”

“…For polymer solutions the logarithmic equation has been applied several times, e. g. for starch and polysaccharids (158,159,160) for gelatine (161), for rubber and polyisobutylene (162) 163). Furukawa (163a), in a kinetic theory of network formation by nonpermanent junctions, treated as a rate process (Eyring), derived equation [34].…”

“…When this viscosity contribution exceeds very much the viscosity without aggregation, practically a power equation for viscosity will result. In gelatinized-system a power formula for the relation between yield-value, shear modulus, elasticity modulus, and concentration has often been reported with n often 2, e. g. for gelatine (161), pectine (192)bentonite suspensions (193). For c may be put (e-Co), c o being the minimal concentration for gelling.…”

The Material Properties of Gelatin Gels

“…5 Heat tends to break down the gelatin molecules ind changes the nature of the solution. This process is an acceleration of the process known as ageing, where the inter-and intramolecular bonds break and reform into ,•.a least energy configuration.…”

Digital Image Correlation for Improved Detection of Basal Cell Carcinoma

“…Gelatin is derived from biological tissue, and its mechanical properties depend on the concentration and Bloom number of the gelatin. Bloom number is a standard measure of the gelatin strength [21]. Due to its biocompatibility and its variability of mechanical properties, gelatin has been used to simulate many tissues [22][23][24][25].…”