Free Volume and Water Sorption by Cellulose Esters
The results ofthe sorption properties of cellulose acetate (CA) with different degrees of substitution (SD) are summarised. It has been shown that the sorption capacity of CA in water vapour decreases naturally with increasing content of acetate groups in monomeric units of cellulose ethers. The exp...
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MDPI AG
2021-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/13/16/2644 |
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| author | Anatoly E. Chalykh Ivan I. Bardyshev Tatiana F. Petrova |
| author_facet | Anatoly E. Chalykh Ivan I. Bardyshev Tatiana F. Petrova |
| author_sort | Anatoly E. Chalykh |
| collection | DOAJ |
| description | The results ofthe sorption properties of cellulose acetate (CA) with different degrees of substitution (SD) are summarised. It has been shown that the sorption capacity of CA in water vapour decreases naturally with increasing content of acetate groups in monomeric units of cellulose ethers. The experimental isotherms are analysed according to the double sorption model. Hydrate numbers of hydroxyl and acetate groups were determined. The paired parameters of the Flory–Huggins interaction were calculated. It is shown that the decrease of the Langmuir component is due to the replacement of hydroxyl groups by ester groups, whose local sorption capacity by water vapour is lower than the sorption capacity of OH groups. In the area of high humidity, there is an increase in vacancy sizes due to plasticisation of the sorbents. |
| first_indexed | 2024-03-10T08:27:20Z |
| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T08:27:20Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-697d448008744cbdac5741ea1ff433b32023-11-22T09:22:10ZengMDPI AGPolymers2073-43602021-08-011316264410.3390/polym13162644Free Volume and Water Sorption by Cellulose EstersAnatoly E. Chalykh0Ivan I. Bardyshev1Tatiana F. Petrova2Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS), 31, bld.4 Leninsky Prospect, 119071 Moscow, RussiaFrumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS), 31, bld.4 Leninsky Prospect, 119071 Moscow, RussiaFrumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS), 31, bld.4 Leninsky Prospect, 119071 Moscow, RussiaThe results ofthe sorption properties of cellulose acetate (CA) with different degrees of substitution (SD) are summarised. It has been shown that the sorption capacity of CA in water vapour decreases naturally with increasing content of acetate groups in monomeric units of cellulose ethers. The experimental isotherms are analysed according to the double sorption model. Hydrate numbers of hydroxyl and acetate groups were determined. The paired parameters of the Flory–Huggins interaction were calculated. It is shown that the decrease of the Langmuir component is due to the replacement of hydroxyl groups by ester groups, whose local sorption capacity by water vapour is lower than the sorption capacity of OH groups. In the area of high humidity, there is an increase in vacancy sizes due to plasticisation of the sorbents.https://www.mdpi.com/2073-4360/13/16/2644diffusionsorption of water vapoursdouble sorption modelcellulose acetatescellulose ester structurefree volume |
| spellingShingle | Anatoly E. Chalykh Ivan I. Bardyshev Tatiana F. Petrova Free Volume and Water Sorption by Cellulose Esters Polymers diffusion sorption of water vapours double sorption model cellulose acetates cellulose ester structure free volume |
| title | Free Volume and Water Sorption by Cellulose Esters |
| title_full | Free Volume and Water Sorption by Cellulose Esters |
| title_fullStr | Free Volume and Water Sorption by Cellulose Esters |
| title_full_unstemmed | Free Volume and Water Sorption by Cellulose Esters |
| title_short | Free Volume and Water Sorption by Cellulose Esters |
| title_sort | free volume and water sorption by cellulose esters |
| topic | diffusion sorption of water vapours double sorption model cellulose acetates cellulose ester structure free volume |
| url | https://www.mdpi.com/2073-4360/13/16/2644 |
| work_keys_str_mv | AT anatolyechalykh freevolumeandwatersorptionbycelluloseesters AT ivanibardyshev freevolumeandwatersorptionbycelluloseesters AT tatianafpetrova freevolumeandwatersorptionbycelluloseesters |