Abstract
The ternary phase diagram based on cellulose (cellulose polymer/mixed solvents/Water (non-solvent)) system has been measured at 30 °C for two sources of cellulose. Cellulose synthesized from fibers of cotton and olive significantly influences the behavior of the crystallization index, which can cause changes during the film formation process. The differences can be explained by the presence of amorphous areas linked to a higher disorder, which is highlighted by the X-ray diffraction analysis XRD (crystallinity rate was 15.6% versus 47.4% for acetylated cellulose). The experimental analysis was carried out on the coexisting phases and the determination of binodal curve. The cellulose film was formed based on the equilibrium diagram to control the structure, which showed some dependence between the composition data and the binary interaction parameters in order to achieve liquid–liquid phase separation. This system required a large amount of water (15–90 wt.% water) to affect the porous and fibrous structure of the film. Olive cellulose films with lower crystallinity have smaller diameter (38 nm), they can swells faster and their solubility increases more, unlike acetate cellulose (56 nm). It can be said that the solvent diffusion is greater in the amorphous domains due to their higher disorder resulting in easy accessibility.
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18 May 2022
A Correction to this paper has been published: https://doi.org/10.1007/s00289-022-04273-4
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The authors are grateful to the center of analysis and quality control (AQC) of Moulay Slimane University for characterization support.
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Rbih, S., Neggaoui, H., Laallam, L. et al. Study on the ternary phase diagram of synthesized cellulose/mixed solvents/water system: influence of crystallinity on dissolution. Polym. Bull. 80, 917–928 (2023). https://doi.org/10.1007/s00289-022-04108-2
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DOI: https://doi.org/10.1007/s00289-022-04108-2