Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods
Cellulose acetate membranes are widely used in industry, emphasizing water purification processes, such as desalination. With some limiting mechanical properties, the synthesis of hybrid membranes appears as an alternative for developing high-performance materials. For its application, knowledge of...
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| Format: | Article |
| Language: | English |
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Universidade Federal do Rio Grande
2022-07-01
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| Series: | Vetor |
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| Online Access: | https://periodicos.furg.br/vetor/article/view/13766 |
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| author | Gesiane Mendonça Ferreira Daniella da Silva Herdi Kelly Cristine Da Silveira M. Clara Gonçalves Mônica Calixto Andrade |
| author_facet | Gesiane Mendonça Ferreira Daniella da Silva Herdi Kelly Cristine Da Silveira M. Clara Gonçalves Mônica Calixto Andrade |
| author_sort | Gesiane Mendonça Ferreira |
| collection | DOAJ |
| description |
Cellulose acetate membranes are widely used in industry, emphasizing water purification processes, such as desalination. With some limiting mechanical properties, the synthesis of hybrid membranes appears as an alternative for developing high-performance materials. For its application, knowledge of thermal stability is crucial. In this work, the thermal degradation kinetics of AC-SiO2-(CH2)3NH2 hybrid cellulose acetate membranes are evaluated from thermogravimetric analysis, at three heating rates, 5, 10, and 20°C/min. The isoconversional methods proposed by Kissinger, Flynn-Wall-Ozawa, and Friedman were used for the present study of degradation kinetics. It was observed that insertion of silicon to polymeric structure promoted thermal stability to the membrane, presenting higher activation energy than pure cellulose acetate membrane, increasing from 240.28 to 1039.01 KJ/mol, using the method of Friedman. In contrast, the increase in nitrogen concentration decreases its thermal stability compared to the cellulose acetate membrane with incorporated silicon, reducing the activation energy from 1039.01 to 250.50 KJ/mol. However, it is more stable than the pure cellulose acetate membrane. The evaluation carried out in this study explained the influence of the minimum variation in the chemical composition against the thermal stability of hybrid membranes, being a factor of great importance for its application.
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| first_indexed | 2024-04-11T12:21:49Z |
| format | Article |
| id | doaj.art-bb39dde852024330b294baf45dc48b44 |
| institution | Directory Open Access Journal |
| issn | 0102-7352 2358-3452 |
| language | English |
| last_indexed | 2024-04-11T12:21:49Z |
| publishDate | 2022-07-01 |
| publisher | Universidade Federal do Rio Grande |
| record_format | Article |
| series | Vetor |
| spelling | doaj.art-bb39dde852024330b294baf45dc48b442022-12-22T04:24:04ZengUniversidade Federal do Rio GrandeVetor0102-73522358-34522022-07-0132110.14295/vetor.v32i1.13766Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional MethodsGesiane Mendonça Ferreira0Daniella da Silva Herdi1Kelly Cristine Da Silveira2M. Clara Gonçalves3Mônica Calixto Andrade4Universidade do Estado do Rio de Janeiro, Instituto Politécnico – Nova Friburgo, RJ, BrasilUniversidade do Estado do Rio de Janeiro, Instituto Politécnico – Nova Friburgo, RJ, BrasilUniversidade do Estado do Rio de Janeiro, Instituto Politécnico – Nova Friburgo, RJ, BrasilDepartamento de Engenharia Química, Instituto Superior Técnico – Lisboa, PortugalUniversidade do Estado do Rio de Janeiro, Instituto Politécnico – Nova Friburgo, RJ, Brasil Cellulose acetate membranes are widely used in industry, emphasizing water purification processes, such as desalination. With some limiting mechanical properties, the synthesis of hybrid membranes appears as an alternative for developing high-performance materials. For its application, knowledge of thermal stability is crucial. In this work, the thermal degradation kinetics of AC-SiO2-(CH2)3NH2 hybrid cellulose acetate membranes are evaluated from thermogravimetric analysis, at three heating rates, 5, 10, and 20°C/min. The isoconversional methods proposed by Kissinger, Flynn-Wall-Ozawa, and Friedman were used for the present study of degradation kinetics. It was observed that insertion of silicon to polymeric structure promoted thermal stability to the membrane, presenting higher activation energy than pure cellulose acetate membrane, increasing from 240.28 to 1039.01 KJ/mol, using the method of Friedman. In contrast, the increase in nitrogen concentration decreases its thermal stability compared to the cellulose acetate membrane with incorporated silicon, reducing the activation energy from 1039.01 to 250.50 KJ/mol. However, it is more stable than the pure cellulose acetate membrane. The evaluation carried out in this study explained the influence of the minimum variation in the chemical composition against the thermal stability of hybrid membranes, being a factor of great importance for its application. https://periodicos.furg.br/vetor/article/view/13766Degradation KineticsCellulose Acetate MembranesHybrid MembranesIsoconversional Methods |
| spellingShingle | Gesiane Mendonça Ferreira Daniella da Silva Herdi Kelly Cristine Da Silveira M. Clara Gonçalves Mônica Calixto Andrade Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods Vetor Degradation Kinetics Cellulose Acetate Membranes Hybrid Membranes Isoconversional Methods |
| title | Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods |
| title_full | Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods |
| title_fullStr | Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods |
| title_full_unstemmed | Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods |
| title_short | Evaluation of Thermal Degradation Kinetics of Hybrid Cellulose Acetate Membranes using Isoconversional Methods |
| title_sort | evaluation of thermal degradation kinetics of hybrid cellulose acetate membranes using isoconversional methods |
| topic | Degradation Kinetics Cellulose Acetate Membranes Hybrid Membranes Isoconversional Methods |
| url | https://periodicos.furg.br/vetor/article/view/13766 |
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