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Structural characteristics and rheological properties of hydroxypropyl trimethyl ammonium chloride chitosan. 2022

Ling Ding, and Zhao Liu, and Shen Song, and Mohamed Aamer Abubaker, and Lele Chen, and Jipeng Shi, and Zengjie Fan, and Ji Zhang
College of Life Science, Northwest Normal University, Lanzhou 730070, China; New Rural Development Research Institute of Northwest Normal University, Lanzhou 730070, China.

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 (2-6 %, 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.

UI MeSH Term Description Entries
D000643 Ammonium Chloride An acidifying agent that has expectorant and diuretic effects. Also used in etching and batteries and as a flux in electroplating. Sal Ammoniac,Ammoniac, Sal,Chloride, Ammonium
D012212 Rheology The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY. Flowmetry,Velocimetry,Velocimetries
D014783 Viscosity The resistance that a gaseous or liquid system offers to flow when it is subjected to shear stress. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Viscosities
D048271 Chitosan Deacetylated CHITIN, a linear polysaccharide of deacetylated beta-1,4-D-glucosamine. It is used in HYDROGEL and to treat WOUNDS. Poliglusam

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