Deliquescence Behavior of Deep Eutectic Solvents
Deep eutectic solvents (DESs) are formed by a hydrogen bond donor and an acceptor. The hydrogen bond interactions between these two components significantly depress the melting temperature of the mixture. DESs have been used as an alternative for organic solvents in various branches of the chemical...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-02-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/11/4/1601 |
| _version_ | 1797411841227358208 |
|---|---|
| author | Henrik Palmelund Jukka Rantanen Korbinian Löbmann |
| author_facet | Henrik Palmelund Jukka Rantanen Korbinian Löbmann |
| author_sort | Henrik Palmelund |
| collection | DOAJ |
| description | Deep eutectic solvents (DESs) are formed by a hydrogen bond donor and an acceptor. The hydrogen bond interactions between these two components significantly depress the melting temperature of the mixture. DESs have been used as an alternative for organic solvents in various branches of the chemical industry. Many DESs are very hygroscopic and water is known to change the properties of DESs, but there has neven been a systematic study performed on the deliquesence behavior of DESs. Therefore, this study investigated the thermal and deliquescent behavior of four DESs. The DES mixtures were stored in desiccators at different relative humidities (RH) to investigate the critical RH (RH<sub>0</sub>) for deliquescence. It was found that, due to the formation of a eutonic mixture, the RH<sub>0</sub> to induce deliquescence for a given DES mixture was lower compared to the individual components comprising the DES. The results showed that, even though all investigated DESs had eutectic melting temperatures above room temperature, but due to the low RH<sub>0</sub>, they were able to appear liquid at room temperature under ambient conditions. The eutonic and eutectic compositions were identified at different compositions for the DESs. The results emphasize that great care must be taken to control the process and storage conditions for DESs. |
| first_indexed | 2024-03-09T04:52:08Z |
| format | Article |
| id | doaj.art-90e55df381b64538bc13d5bb8086c8e1 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T04:52:08Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-90e55df381b64538bc13d5bb8086c8e12023-12-03T13:09:42ZengMDPI AGApplied Sciences2076-34172021-02-01114160110.3390/app11041601Deliquescence Behavior of Deep Eutectic SolventsHenrik Palmelund0Jukka Rantanen1Korbinian Löbmann2Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, DenmarkDepartment of Pharmacy, University of Copenhagen, 2100 Copenhagen, DenmarkDepartment of Pharmacy, University of Copenhagen, 2100 Copenhagen, DenmarkDeep eutectic solvents (DESs) are formed by a hydrogen bond donor and an acceptor. The hydrogen bond interactions between these two components significantly depress the melting temperature of the mixture. DESs have been used as an alternative for organic solvents in various branches of the chemical industry. Many DESs are very hygroscopic and water is known to change the properties of DESs, but there has neven been a systematic study performed on the deliquesence behavior of DESs. Therefore, this study investigated the thermal and deliquescent behavior of four DESs. The DES mixtures were stored in desiccators at different relative humidities (RH) to investigate the critical RH (RH<sub>0</sub>) for deliquescence. It was found that, due to the formation of a eutonic mixture, the RH<sub>0</sub> to induce deliquescence for a given DES mixture was lower compared to the individual components comprising the DES. The results showed that, even though all investigated DESs had eutectic melting temperatures above room temperature, but due to the low RH<sub>0</sub>, they were able to appear liquid at room temperature under ambient conditions. The eutonic and eutectic compositions were identified at different compositions for the DESs. The results emphasize that great care must be taken to control the process and storage conditions for DESs.https://www.mdpi.com/2076-3417/11/4/1601deep eutectic solventsdeep eutecticsdeliquescencevapor sorptionphase behavior |
| spellingShingle | Henrik Palmelund Jukka Rantanen Korbinian Löbmann Deliquescence Behavior of Deep Eutectic Solvents Applied Sciences deep eutectic solvents deep eutectics deliquescence vapor sorption phase behavior |
| title | Deliquescence Behavior of Deep Eutectic Solvents |
| title_full | Deliquescence Behavior of Deep Eutectic Solvents |
| title_fullStr | Deliquescence Behavior of Deep Eutectic Solvents |
| title_full_unstemmed | Deliquescence Behavior of Deep Eutectic Solvents |
| title_short | Deliquescence Behavior of Deep Eutectic Solvents |
| title_sort | deliquescence behavior of deep eutectic solvents |
| topic | deep eutectic solvents deep eutectics deliquescence vapor sorption phase behavior |
| url | https://www.mdpi.com/2076-3417/11/4/1601 |
| work_keys_str_mv | AT henrikpalmelund deliquescencebehaviorofdeepeutecticsolvents AT jukkarantanen deliquescencebehaviorofdeepeutecticsolvents AT korbinianlobmann deliquescencebehaviorofdeepeutecticsolvents |