Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies
The effect of acetonitrile (ACN) on the micellization of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), in aqueous solutions at different temperatures was studied. The critical micellar concentration (CMC) as well as the degree of counter ion dissociation (a) of CTAB in aqueous ACN m...
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| Format: | Article |
| Language: | English |
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Society of Chemists and Technologists of Macedonia
2021-11-01
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| Series: | Macedonian Journal of Chemistry and Chemical Engineering |
| Subjects: | |
| Online Access: | https://mjcce.org.mk/index.php/MJCCE/article/view/2394 |
| _version_ | 1830230970806042624 |
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| author | Aleksandra Miroslav Janošević Ležaić Nataša Pejić Jelena Goronja Leposava Pavun Danijela Đikanović Anđelija Malenović |
| author_facet | Aleksandra Miroslav Janošević Ležaić Nataša Pejić Jelena Goronja Leposava Pavun Danijela Đikanović Anđelija Malenović |
| author_sort | Aleksandra Miroslav Janošević Ležaić |
| collection | DOAJ |
| description |
The effect of acetonitrile (ACN) on the micellization of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), in aqueous solutions at different temperatures was studied. The critical micellar concentration (CMC) as well as the degree of counter ion dissociation (a) of CTAB in aqueous ACN mixtures (10-20 % v/v) at various temperatures (291.2-298.2 K) were determined by electrical conductivity measurements, while steady-state fluorescence measurements were used to determine several CMCs (for comparison) and a micellar aggregation number (Nagg) as well. At a fixed temperature, both an increase in CMC and a decrease in Nagg were observed for an increase in ACN in the solvent mixture. With a temperature increase, CMC values increased for 10 % (v/v) ACN, while for both 15 % and 20 % (v/v) ACN, CMC values were a minimum at T = 295.2 K with a temperature increase. In addition, some aspects related to the Krafft temperature behavior of CTAB in the examined micellar systems are discussed.
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| first_indexed | 2024-12-18T11:03:41Z |
| format | Article |
| id | doaj.art-5fc22b695d2347aaade09e61fb19f7d9 |
| institution | Directory Open Access Journal |
| issn | 1857-5552 1857-5625 |
| language | English |
| last_indexed | 2024-12-18T11:03:41Z |
| publishDate | 2021-11-01 |
| publisher | Society of Chemists and Technologists of Macedonia |
| record_format | Article |
| series | Macedonian Journal of Chemistry and Chemical Engineering |
| spelling | doaj.art-5fc22b695d2347aaade09e61fb19f7d92022-12-21T21:10:10ZengSociety of Chemists and Technologists of MacedoniaMacedonian Journal of Chemistry and Chemical Engineering1857-55521857-56252021-11-0140210.20450/mjcce.2021.23941935Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studiesAleksandra Miroslav Janošević Ležaić0Nataša Pejić1Jelena Goronja2Leposava Pavun3Danijela Đikanović4Anđelija Malenović5Faculty of Pharmacy, University of BelgradeFaculty of Pharmacy, University of BelgradeFaculty of Pharmacy, University of BelgradeFaculty of Pharmacy, University of BelgradeFaculty of Pharmacy, University of BelgradeFaculty of Pharmacy, University of Belgrade The effect of acetonitrile (ACN) on the micellization of a cationic surfactant, cetyltrimethylammonium bromide (CTAB), in aqueous solutions at different temperatures was studied. The critical micellar concentration (CMC) as well as the degree of counter ion dissociation (a) of CTAB in aqueous ACN mixtures (10-20 % v/v) at various temperatures (291.2-298.2 K) were determined by electrical conductivity measurements, while steady-state fluorescence measurements were used to determine several CMCs (for comparison) and a micellar aggregation number (Nagg) as well. At a fixed temperature, both an increase in CMC and a decrease in Nagg were observed for an increase in ACN in the solvent mixture. With a temperature increase, CMC values increased for 10 % (v/v) ACN, while for both 15 % and 20 % (v/v) ACN, CMC values were a minimum at T = 295.2 K with a temperature increase. In addition, some aspects related to the Krafft temperature behavior of CTAB in the examined micellar systems are discussed. https://mjcce.org.mk/index.php/MJCCE/article/view/2394acetonitrile/water mixturescetyltrimethylammonium bromideconductometrycritical micellar concentrationsteady-state fluorescence measurements |
| spellingShingle | Aleksandra Miroslav Janošević Ležaić Nataša Pejić Jelena Goronja Leposava Pavun Danijela Đikanović Anđelija Malenović Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies Macedonian Journal of Chemistry and Chemical Engineering acetonitrile/water mixtures cetyltrimethylammonium bromide conductometry critical micellar concentration steady-state fluorescence measurements |
| title | Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies |
| title_full | Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies |
| title_fullStr | Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies |
| title_full_unstemmed | Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies |
| title_short | Micellar properties of cetyltrimethylammonium bromide in an acetonitrile–water mixture: Conductometric and fluorescence studies |
| title_sort | micellar properties of cetyltrimethylammonium bromide in an acetonitrile water mixture conductometric and fluorescence studies |
| topic | acetonitrile/water mixtures cetyltrimethylammonium bromide conductometry critical micellar concentration steady-state fluorescence measurements |
| url | https://mjcce.org.mk/index.php/MJCCE/article/view/2394 |
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