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Control on rheological behavior of collagen 1 dispersions for efficient electrospinning
Author(s) -
Tenchurin Timur Kh.,
Belousov Sergey I.,
Kiryukhin Yury I.,
Istranov Leonid P.,
Istranova Elena V.,
Shepelev Alexey D.,
Mamagulashvili Vissarion G.,
Kamyshinsky Roman A.,
Chvalun Sergei N.
Publication year - 2019
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.36459
Subject(s) - materials science , rheology , electrospinning , acetic acid , viscosity , rheometry , aqueous solution , dynamic mechanical analysis , dispersion (optics) , drop (telecommunication) , composite material , atmospheric temperature range , chemical engineering , shear rate , polymer , organic chemistry , thermodynamics , telecommunications , chemistry , physics , computer science , optics , engineering
For efficient manufacturing of fibrous collagen‐based materials by electrospinning, the search on optimal rheological parameters is of the great importance. Rheological characteristics and denaturation of collagen in aqueous dispersions were studied as a function of shear rate and acetic acid concentration in the range of 3–9% w/w at temperature from 20 to 40°C. It was shown that an increase in temperature, acetic acid concentration of the collagen dispersion leads to a significant decrease in its viscosity. It was found that helical conformation of the collagen macromolecules is preserved up to 31°C. An increase in acetic acid concentration leads to a reduction of denaturation temperature. The complex viscosity of collagen dispersions exhibits a sharp drop, followed by a rapid growth of damping factor in the temperature range from 22 to 35°C. Both storage ( G′ ) and loss ( G″ ) moduli increase with frequency and collagen concentration. It was revealed that optimal parameters for electrospinning of highly concentrated collagen dispersions can be achieved by adjusting of the concentration of acetic acid, temperature, and stirring speed. As a result, collagen nonwoven materials with diameter from 100 to 700 nm were obtained. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 312–318, 2019.