Affiliation:
1. Lomonosov Moscow State University
Abstract
The rheological properties of hydrogels of a natural polysaccharide sodium alginate and small
amount of clay nanotubes of halloysite were investigated. Changes of rheological properties
during the transition from a semi-dilute polymer solution to a hydrogel upon cross-linking by
calcium ions were shown. In the gel state, the samples have a yield stress, and their viscosity
decreases with the shear rate, but the properties are quickly recovered after the load removal.
It was obtained that the addition of up to 0.3 vol.% nanotubes of natural clay halloysite leads to
an increase by several times of a storage modulus and an yield stress of the hydrogels. At the
same time, the practically important properties of shear thinning and the rapid recovery of
properties after the load removing make the nanocomposite hydrogels of alginate and halloysite
nanotubes promising for use as ink for extrusion 3D printing.
Funder
Russian Science Foundation
Cited by
1 articles.
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