Acid-induced gelation of carboxymethylcellulose solutions
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866914651043790848 |
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| author | Legrand, Gauthier Baeza, Guilhem P. Peyla, Matteo Porcar, Lionel Fernández-de-Alba, Carlos Manneville, Sébastien Divoux, Thibaut |
| author_facet | Legrand, Gauthier Baeza, Guilhem P. Peyla, Matteo Porcar, Lionel Fernández-de-Alba, Carlos Manneville, Sébastien Divoux, Thibaut |
| contents | The present work offers a comprehensive description of the acid-induced gelation of carboxymethylcellulose (CMC), a water-soluble derivative of cellulose broadly used in numerous applications ranging from food packaging to biomedical engineering. Linear viscoelastic properties measured at various pH and CMC contents allow us to build a sol-gel phase diagram, and show that CMC gels exhibit broad power-law viscoelastic spectra that can be rescaled onto a master curve following a time-composition superposition principle. These results demonstrate the microstructural self-similarity of CMC gels, and inspire a mean-field model based on hydrophobic inter-chain association that accounts for the sol-gel boundary over the entire range of CMC content under study. Neutron scattering experiments further confirm this picture and suggest that CMC gels comprise a fibrous network crosslinked by aggregates. Finally, low-field NMR measurements offer an original signature of acid-induced gelation from the solvent perspective. Altogether, these results open avenues for precise manipulation and control of CMC-based hydrogels. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_06410 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Acid-induced gelation of carboxymethylcellulose solutions Legrand, Gauthier Baeza, Guilhem P. Peyla, Matteo Porcar, Lionel Fernández-de-Alba, Carlos Manneville, Sébastien Divoux, Thibaut Soft Condensed Matter Materials Science Applied Physics The present work offers a comprehensive description of the acid-induced gelation of carboxymethylcellulose (CMC), a water-soluble derivative of cellulose broadly used in numerous applications ranging from food packaging to biomedical engineering. Linear viscoelastic properties measured at various pH and CMC contents allow us to build a sol-gel phase diagram, and show that CMC gels exhibit broad power-law viscoelastic spectra that can be rescaled onto a master curve following a time-composition superposition principle. These results demonstrate the microstructural self-similarity of CMC gels, and inspire a mean-field model based on hydrophobic inter-chain association that accounts for the sol-gel boundary over the entire range of CMC content under study. Neutron scattering experiments further confirm this picture and suggest that CMC gels comprise a fibrous network crosslinked by aggregates. Finally, low-field NMR measurements offer an original signature of acid-induced gelation from the solvent perspective. Altogether, these results open avenues for precise manipulation and control of CMC-based hydrogels. |
| title | Acid-induced gelation of carboxymethylcellulose solutions |
| topic | Soft Condensed Matter Materials Science Applied Physics |
| url | https://arxiv.org/abs/2311.06410 |