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•The study of electrical conductivity, surface tension, as well as the dependence of viscosity on the shear rate of solutions of chitosan of different concentrations and mixtures containing chitin nanofibrils and polyethylene oxide was carried out.•It is shown, that electrical conductivity of chitosan solutions and the mixtures containing chitin nanofibrils is 3–4 orders of magnitude higher than the corresponding parameters for the polymers with high rate of electrospinning.•Introducing 20 wt.% of chitin nanofibrils into chitosan solution leads to increase in viscosity of the mixture, and its dependence on shear rate becomes more pronounced.•It is assumed that this phenomenon is caused by the formation of cluster structures involving filler particles, and orientation of chitin nanofibrils under the action of shear stresses that appear in electromagnetic field.•X-ray diffraction analysis revealed the orientation of chitin nanofibrils with respect to the axes of composite nanofibers.
Electrical conductivity, surface tension and viscosity of chitosan-based composite nanofibers are reported. 20 wt.% of chitin nanofibrils introduced into a chitosan solution leads to increase in viscosity of the mixture; the effect of shear rate becomes more pronounced. This phenomenon is caused by the formation of cluster structures involving filler particles, and by orientation of chitin nanofibrils under the action of shear stresses in electromagnetic field. Presence of chitin facilitated formation of nanofibers in electric field and led to significant decrease in the amount of defects.