Cellulose porosity improves its dissolution by facilitating solvent diffusion
| Autor: | Sanjit Acharya, Yang Hu, Noureddine Abidi |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Hot Temperature
Materials science Nitrogen Diffusion 02 engineering and technology Biochemistry 03 medical and health sciences chemistry.chemical_compound X-Ray Diffraction Structural Biology Freezing Effective diffusion coefficient Desiccation Cellulose Solubility Porosity Molecular Biology Dissolution 030304 developmental biology 0303 health sciences General Medicine equipment and supplies 021001 nanoscience & nanotechnology Solutions Solvent Volume (thermodynamics) chemistry Chemical engineering Solvents Adsorption Rheology 0210 nano-technology |
| Zdroj: | International Journal of Biological Macromolecules. 123:1289-1296 |
| ISSN: | 0141-8130 |
| Popis: | This paper reports on the effect of improved porous characteristics of cellulose on its solubility in DMAc/LiCl. The use of freeze-drying (FD) treatment led to higher surface area and void fraction of volume for high-molecular-weight (HMW) cotton cellulose (DP~5000). Improvement in porous characteristics of cellulose did not change the chemical and crystalline structures of cellulose, as compared to hot-drying (HD) treatment. However, significant improvement in the dissolution of FD-HMW cellulose in DMAc/LiCl was observed under relatively low temperature (80 °C). The relationship between the solubility and the porous characteristics of cellulose was discussed using Stokes-Einstein Equation and effective diffusion coefficient equation. It was concluded that the increase in the diffusion coefficient of the solvent and the improvement in the porous characteristics of cellulose played key roles to enhance the diffusion rate of the solvent through the cellulose molecular network. |
| Databáze: | OpenAIRE |
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