Optical microinterferometry method for evaluation of phase state and diffusion in ternary systems: phase separation in cellulose N-Methylmorpholine-N-oxide non-solvent mixtures

Microinterferometry technique was used to evaluate the phase state and diffusion of cellulose solutions N-Methylmorpholine-N-oxide upon contact with non-solvents (water and aqueous solutions of isopropyl alcohol). The method was helpful in visualization of the structure of the forming cellulose film...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-09, Vol.751 (1), p.12045
Main Authors: Makarova, V V, Antonov, S V, Anokhina, T A, Volkov, V V
Format: Article
Language:English
Subjects:
Aqueous solutions
Cellulose
Chemical precipitation
Coagulants
Diffusion rate
Interdiffusion
Isopropanol
Morphology
Phase separation
Physics
Solvents
Ternary systems
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Summary:Microinterferometry technique was used to evaluate the phase state and diffusion of cellulose solutions N-Methylmorpholine-N-oxide upon contact with non-solvents (water and aqueous solutions of isopropyl alcohol). The method was helpful in visualization of the structure of the forming cellulose film in connection with the diffusivity of the components of the systems. The interdiffusion coefficient were determined. Isopropyl alcohol addition to water slows down the diffusion of the coagulant into the cellulose solution thus delaying cellulose precipitation. Increase of temperature leads to formation of less dense cellulose film morphology with large vacuoles.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/751/1/012045