Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl Acetate
Dodecyl acetate (DDA), a volatile compound present in insect sex pheromones, was incorporated into alginate-based granules to obtain controlled-release formulations (CRFs). In this research, not only was the effect of adding bentonite to the basic alginate-hydrogel formulation studied, but also that...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Gels |
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| Online Access: | https://www.mdpi.com/2310-2861/9/5/388 |
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| author | Francisco Flores-Céspedes Matilde Villafranca-Sánchez Manuel Fernández-Pérez |
| author_facet | Francisco Flores-Céspedes Matilde Villafranca-Sánchez Manuel Fernández-Pérez |
| author_sort | Francisco Flores-Céspedes |
| collection | DOAJ |
| description | Dodecyl acetate (DDA), a volatile compound present in insect sex pheromones, was incorporated into alginate-based granules to obtain controlled-release formulations (CRFs). In this research, not only was the effect of adding bentonite to the basic alginate-hydrogel formulation studied, but also that of the encapsulation efficiency on the release rate of DDA in laboratory and field experiments. DDA encapsulation efficiency increased as the alginate/bentonite ratio increased. From the preliminary volatilization experiments, a linear relationship was found between the DDA release percentage and the amount of bentonite present in the alginate CRFs. Laboratory kinetic volatilization experiments showed that the selected alginate-bentonite formulation (DDAB<sub>75</sub>A<sub>10</sub>) exhibited a prolonged DDA release profile. The value of the diffusional exponent obtained from the Ritger and Peppas model (<i>n</i> = 0.818) indicated that the release process follows a non-Fickian or anomalous transport mechanism. Field volatilization experiments showed a steady release of DDA over time from the alginate-based hydrogels tested. This result, together with those obtained from the laboratory release experiments, allowed the obtainment of a set of parameters to improve the preparation of alginate-based CRFs for the use of volatile biological molecules, such as DDA, in agricultural biological control programs. |
| first_indexed | 2024-03-11T03:42:14Z |
| format | Article |
| id | doaj.art-1bacf6394f2e447cbd076a28603be476 |
| institution | Directory Open Access Journal |
| issn | 2310-2861 |
| language | English |
| last_indexed | 2024-03-11T03:42:14Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-1bacf6394f2e447cbd076a28603be4762023-11-18T01:27:49ZengMDPI AGGels2310-28612023-05-019538810.3390/gels9050388Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl AcetateFrancisco Flores-Céspedes0Matilde Villafranca-Sánchez1Manuel Fernández-Pérez2Department of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Agrifood Campus of International Excellence (ceiA3), Crta. Sacramento s/n, 04120 Almería, SpainDepartment of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Agrifood Campus of International Excellence (ceiA3), Crta. Sacramento s/n, 04120 Almería, SpainDepartment of Chemistry and Physics, Research Centre CIAIMBITAL, University of Almería, Agrifood Campus of International Excellence (ceiA3), Crta. Sacramento s/n, 04120 Almería, SpainDodecyl acetate (DDA), a volatile compound present in insect sex pheromones, was incorporated into alginate-based granules to obtain controlled-release formulations (CRFs). In this research, not only was the effect of adding bentonite to the basic alginate-hydrogel formulation studied, but also that of the encapsulation efficiency on the release rate of DDA in laboratory and field experiments. DDA encapsulation efficiency increased as the alginate/bentonite ratio increased. From the preliminary volatilization experiments, a linear relationship was found between the DDA release percentage and the amount of bentonite present in the alginate CRFs. Laboratory kinetic volatilization experiments showed that the selected alginate-bentonite formulation (DDAB<sub>75</sub>A<sub>10</sub>) exhibited a prolonged DDA release profile. The value of the diffusional exponent obtained from the Ritger and Peppas model (<i>n</i> = 0.818) indicated that the release process follows a non-Fickian or anomalous transport mechanism. Field volatilization experiments showed a steady release of DDA over time from the alginate-based hydrogels tested. This result, together with those obtained from the laboratory release experiments, allowed the obtainment of a set of parameters to improve the preparation of alginate-based CRFs for the use of volatile biological molecules, such as DDA, in agricultural biological control programs.https://www.mdpi.com/2310-2861/9/5/388alginatebentonitedodecyl acetatecontrolled release |
| spellingShingle | Francisco Flores-Céspedes Matilde Villafranca-Sánchez Manuel Fernández-Pérez Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl Acetate Gels alginate bentonite dodecyl acetate controlled release |
| title | Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl Acetate |
| title_full | Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl Acetate |
| title_fullStr | Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl Acetate |
| title_full_unstemmed | Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl Acetate |
| title_short | Alginate-Bentonite-Based Hydrogels Designed to Obtain Controlled-Release Formulations of Dodecyl Acetate |
| title_sort | alginate bentonite based hydrogels designed to obtain controlled release formulations of dodecyl acetate |
| topic | alginate bentonite dodecyl acetate controlled release |
| url | https://www.mdpi.com/2310-2861/9/5/388 |
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