Effects of salt concentration on the structure and properties of composite fiber of carboxymethyl cellulose/N-2-hydroxylpropyl trimethyl ammonium chloride chitosan prepared by polyelectoyte complexation-freeze drying

Pervaporation Removal of Pyridine from Saline Pyridine/Water Effluents Using PEBA-2533 Membranes: Experiment and Simulation

“…Figure d shows the molecular distribution after adding NaCl into the mixed solution. As a strong electrolyte, NaCl existed as an ion in aqueous solutions. , Pyridine and water molecules were removed using the above method, and the results are shown in Figure e and Figure f. After several simulations, the simulation results were averaged and are recorded in Table .…”

Self-triggered carboxymethyl chitosan hydrogel for the convenient sustained release of ClO2 gas with environmental stability and long-term antimicrobial effect

“…The system was set to the canonical ensemble (NVT) and the temperature was set to 298 K. 32 CMCS was simulated as a 20-bead chain. 33 The Dreiding field suitable for biochemical and polymer system simulation was selected for the kinetic simulation. The simulation system containing CMCS, Zn 2+ , and water was put in a cubic cell of 111 Â 111 Â 111 Å with a periodic boundary condition.…”

An Overview of the Design of Chitosan-Based Fiber Composite Materials

“…A recent study on PECs based on the preparation of freeze-dried composite fibers by Chen et al [50] revealed that salt concentration can significantly impact the morphology of such composite fibers. In this study, carboxymethyl cellulose (cm-cellulose)/N-2hydroxylpropyl trimethylammonium chloride chitosan (HACC) composite fibers were prepared from a dispersion of PECs at different NaCl concentrations by freeze-drying.…”

“…Based on this study, a suitable salt concentration can favor the extension of polyelectrolyte polymers in solution leading to the formation of uniform fibers along with the enhancement of thermal stability. A recent study on PECs based on the preparation of freeze-dried composite fibers by Chen et al [50] revealed that salt concentration can significantly impact the morphology of such composite fibers. In this study, carboxymethyl cellulose (cm-cellulose)/N-2-hydroxylpropyl trimethylammonium chloride chitosan (HACC) composite fibers were prepared from a dispersion of PECs at different NaCl concentrations by freeze-drying.…”

“…Recent advances in the mode of preparation for such composite materials has focused mainly on improving the biocompatibility, stability in aqueous media, controlling the morphology, and enhancing the mechanical properties. In the case of freeze-dried materials, the main target is controlling the morphology and enhancing the mechanical properties, which can be accomplished by changing reaction conditions such as salt concentration [50] and heating before freeze-drying [51]. For electrospun materials, an emphasis on improving the biocompatibility and water stability by removing the co-spinning agent [111] or using a biocompatible co-spinning agent to replace common synthetic polymers [84].…”