Structural characteristics and rheological properties of hydroxypropyl trimethyl ammonium chloride chitosan.
Int J Biol Macromol
; 216: 312-321, 2022 Sep 01.
Article
en En
| MEDLINE
| ID: mdl-35777515
Hydroxypropyl trimethyl ammonium chloride chitosan (HACC) was synthesized by reacting chitosan with glycidyl trimethylammonium chloride. Atomic force microscopy showed that HACC exhibited disorderly coils in dilute solution and formed a three-dimensional network. Flow, thixotropy, and dynamic viscoelasticity tests were conducted using an MCR301 rheometer. The HACC solution was a non-Newtonian pseudoplastic fluid, and the shear behavior of different concentrations (2-6â¯%, w/v) was evaluated by the Williamson model fitting. Furthermore, the thixotropy was highly dependent on concentration changes: the high-concentration solution structure was difficult to recover in a short time. The dynamic viscoelasticity test indicated that the viscoelasticity of the HACC solution not only exhibited a viscous behavior similar to that of a fluid, but also exhibited elastic properties of weak gel. HACC exhibited high-strength solid-like gel characteristics at high temperature.
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Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Quitosano
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Int J Biol Macromol
Año:
2022
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
Países Bajos