On the Thermochemical Transition Depression of Cellulose Acetate Composite Membranes
Gallic acid (GA) and quercetin (QU) are two important bioactive molecules with increased biomedical interest. Cellulose acetate (CA) is a polymer derived from cellulose and is used in various applications. In this work, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and Fo...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-08-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/16/3434 |
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| author | Costas Tsioptsias George-Romanos P. Foukas Savvina-Maria Papaioannou Evangelos Tzimpilis Ioannis Tsivintzelis |
| author_facet | Costas Tsioptsias George-Romanos P. Foukas Savvina-Maria Papaioannou Evangelos Tzimpilis Ioannis Tsivintzelis |
| author_sort | Costas Tsioptsias |
| collection | DOAJ |
| description | Gallic acid (GA) and quercetin (QU) are two important bioactive molecules with increased biomedical interest. Cellulose acetate (CA) is a polymer derived from cellulose and is used in various applications. In this work, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) were used to study the thermal behavior of electrospun CA membranes loaded with quercetin or gallic acid. It was found that gallic acid and quercetin depress the thermochemical transition (simultaneous softening and decomposition) of CA, in a mechanism similar to that of the glass transition depression of amorphous polymers by plasticizers. The extensive hydrogen bonding, besides the well-known effect of constraining polymer’s softening by keeping macromolecules close to each other, has a secondary effect on the thermochemical transition, i.e., it weakens chemical bonds and, inevitably, facilitates decomposition. This second effect of hydrogen bonding can provide an explanation for an unexpected observation of this study: CA membranes loaded with quercetin or gallic acid soften at lower temperatures; however, at the same time, they decompose to a higher extent than pure CA. Besides optimization of CA processing, the fundamental understanding of the thermochemical transition depression could lead to the design of more sustainable processes for biomass recycling and conversion. |
| first_indexed | 2024-03-09T12:42:56Z |
| format | Article |
| id | doaj.art-8765593bd7364dbdb49aeec4f8ac7a1f |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T12:42:56Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-8765593bd7364dbdb49aeec4f8ac7a1f2023-11-30T22:16:10ZengMDPI AGPolymers2073-43602022-08-011416343410.3390/polym14163434On the Thermochemical Transition Depression of Cellulose Acetate Composite MembranesCostas Tsioptsias0George-Romanos P. Foukas1Savvina-Maria Papaioannou2Evangelos Tzimpilis3Ioannis Tsivintzelis4Department of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, GR-54124 Thessaloniki, GreeceDepartment of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, GR-54124 Thessaloniki, GreeceDepartment of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, GR-54124 Thessaloniki, GreeceDepartment of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, GR-54124 Thessaloniki, GreeceDepartment of Chemical Engineering, Aristotle University of Thessaloniki, University Campus, GR-54124 Thessaloniki, GreeceGallic acid (GA) and quercetin (QU) are two important bioactive molecules with increased biomedical interest. Cellulose acetate (CA) is a polymer derived from cellulose and is used in various applications. In this work, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FTIR) were used to study the thermal behavior of electrospun CA membranes loaded with quercetin or gallic acid. It was found that gallic acid and quercetin depress the thermochemical transition (simultaneous softening and decomposition) of CA, in a mechanism similar to that of the glass transition depression of amorphous polymers by plasticizers. The extensive hydrogen bonding, besides the well-known effect of constraining polymer’s softening by keeping macromolecules close to each other, has a secondary effect on the thermochemical transition, i.e., it weakens chemical bonds and, inevitably, facilitates decomposition. This second effect of hydrogen bonding can provide an explanation for an unexpected observation of this study: CA membranes loaded with quercetin or gallic acid soften at lower temperatures; however, at the same time, they decompose to a higher extent than pure CA. Besides optimization of CA processing, the fundamental understanding of the thermochemical transition depression could lead to the design of more sustainable processes for biomass recycling and conversion.https://www.mdpi.com/2073-4360/14/16/3434cellulose acetatequercetingallic acidthermochemical transitionhydrogen bondingelectrospinning |
| spellingShingle | Costas Tsioptsias George-Romanos P. Foukas Savvina-Maria Papaioannou Evangelos Tzimpilis Ioannis Tsivintzelis On the Thermochemical Transition Depression of Cellulose Acetate Composite Membranes Polymers cellulose acetate quercetin gallic acid thermochemical transition hydrogen bonding electrospinning |
| title | On the Thermochemical Transition Depression of Cellulose Acetate Composite Membranes |
| title_full | On the Thermochemical Transition Depression of Cellulose Acetate Composite Membranes |
| title_fullStr | On the Thermochemical Transition Depression of Cellulose Acetate Composite Membranes |
| title_full_unstemmed | On the Thermochemical Transition Depression of Cellulose Acetate Composite Membranes |
| title_short | On the Thermochemical Transition Depression of Cellulose Acetate Composite Membranes |
| title_sort | on the thermochemical transition depression of cellulose acetate composite membranes |
| topic | cellulose acetate quercetin gallic acid thermochemical transition hydrogen bonding electrospinning |
| url | https://www.mdpi.com/2073-4360/14/16/3434 |
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