Dilute solution viscometry study on the miscibility of N,O-carboxymethyl chitosan-cellulose acetate blends

Abstract

Dilute solution viscometry method is used for studying viscosity behavior of newly prepared N , O -carboxymethyl chitosan (NOCC), cellulose acetate (CA), and their blends at different compositions (0/10, 2/8, 4/6, 5/5, 6/4, 8/2, 10/0). In this method, reduced viscosity ( η sp / c ) and inherent viscosity (ln η rel / c ) of the given polymer sample have been determined by measuring the fl ow time of the polymer sample in acetone solvent. Huggins ( k ) and Kraemer coeffi cients ( k ′ ) for given polymer-solvent system are calculated from the extrapolation of plots ( η sp / c ) versus ( c ) and (ln η rel / c ) versus ( c ). The miscibility of this polymer system is determined using different criteria such as ∆ b , ∆ b ′ , b 12 exp , interaction parameter ∆ [ η ], thermodynamic parameter α , and modifi ed thermodynamic parameter β . Based on the positive or negative sign of this criteria, miscibility of the polymer system is investigated. The results of the dilute solution viscometry method suggested that the NOCC/CA blends are miscible at the compositions range of 4/6, 5/5, 6/4, and 8/2 and completely immiscible at the 2/8 composition. The results are also supported by Fourier transform infrared analyses of all the compositions.

Manufacture and performance of ethylamine hydroxyethyl chitosan/cellulose fiber in N -methylmorpholine- N -oxide system

“…Among these polymer blends, chitosan/cellulose blend is one of the most promising materials because of the abundance of cellulose and chitin which is parent polymer of chitosan. Numerous investigations have been carried out about chitosan/cellulose blends, which seem to be proper to prepare antibacterial Lyocell fibers [13][14][15][16].…”

One pot blending of biopolymer‐TiO2 composite membranes with enhanced mechanical strength

“…Therefore, additive or even synergistic effects can render the performance of CTS membrane more functional. For example, separation performance of the CA membrane can be increased by blending N,O-carboxymethyl chitosan and CA; 28,29 also, antibacterial properties of cyanoethylchitosan/CA polymer blended membrane has been improved. 27 It has been demonstrated that the existence of inorganic segments could enhance the chemical stability, thermal tolerance, and mechanical properties, and tune the microstructure and Additional Supporting Information may be found in the online version of this article.…”

“…Therefore, additive or even synergistic effects can render the performance of CTS membrane more functional. For example, separation performance of the CA membrane can be increased by blending N , O ‐carboxymethyl chitosan and CA; also, antibacterial properties of cyanoethylchitosan/CA polymer blended membrane has been improved …”