High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical Studies
Nowadays, proteins and polysaccharides play a fundamental role in the manufacturing of biocompatible materials applied in food packaging. The resulting films have, however, limits associated with the resistance to mechanical stress; therefore, it is important to reinforce the initial mixture with ad...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-07-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/7/695 |
| _version_ | 1797417063422099456 |
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| author | Clarissa Murru Mohammad Amin Mohammadifar Jakob Birkedal Wagner Rosana Badía Laiño Marta Elena Díaz García |
| author_facet | Clarissa Murru Mohammad Amin Mohammadifar Jakob Birkedal Wagner Rosana Badía Laiño Marta Elena Díaz García |
| author_sort | Clarissa Murru |
| collection | DOAJ |
| description | Nowadays, proteins and polysaccharides play a fundamental role in the manufacturing of biocompatible materials applied in food packaging. The resulting films have, however, limits associated with the resistance to mechanical stress; therefore, it is important to reinforce the initial mixture with additives that promote the development of stronger molecular links. Carbon dots (CDs) are excellent candidates for this purpose due to the presence of surface functional groups that determine the formation of numerous intramolecular bonds between the charged biopolymers. The present research aims to evaluate the effect of CDs on the mechanical properties of biopolymer films obtained from sodium caseinate (CAS), high methoxyl pectin (HMP) and glycerol used as plasticizers. Green carbon dots (gCDs) were obtained from natural organic sources by green synthesis. The effects of gCDs on the flow behavior and viscoelastic properties of mixed biopolymer dispersions and the thermophysical properties of the corresponded films were evaluated by steady and unsteady shear rheological measurements and differential scanning calorimetry (DSC) tests, respectively. The dynamic mechanical measurements were realized taking into account the parameters of temperature and relative humidity. The results indicate a significant change in the viscosity of the protein–polysaccharide dispersions and the thermomechanical properties of the corresponding film samples reinforced with higher amounts of gCDs. |
| first_indexed | 2024-03-09T06:13:30Z |
| format | Article |
| id | doaj.art-3938b5b258f945fd83b96cefc19a8c42 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T06:13:30Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-3938b5b258f945fd83b96cefc19a8c422023-12-03T11:55:29ZengMDPI AGMembranes2077-03752022-07-0112769510.3390/membranes12070695High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical StudiesClarissa Murru0Mohammad Amin Mohammadifar1Jakob Birkedal Wagner2Rosana Badía Laiño3Marta Elena Díaz García4Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33006 Asturias, SpainResearch Group for Food Production Engineering, National Food Institute, Technical University of Denmark, Søltofts Plads, 2800 Kongens Lyngby, DenmarkDTU Nanolab, Technical University of Denmark, Fysikvej, 2800 Kongens Lyngby, DenmarkDepartment of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33006 Asturias, SpainDepartment of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33006 Asturias, SpainNowadays, proteins and polysaccharides play a fundamental role in the manufacturing of biocompatible materials applied in food packaging. The resulting films have, however, limits associated with the resistance to mechanical stress; therefore, it is important to reinforce the initial mixture with additives that promote the development of stronger molecular links. Carbon dots (CDs) are excellent candidates for this purpose due to the presence of surface functional groups that determine the formation of numerous intramolecular bonds between the charged biopolymers. The present research aims to evaluate the effect of CDs on the mechanical properties of biopolymer films obtained from sodium caseinate (CAS), high methoxyl pectin (HMP) and glycerol used as plasticizers. Green carbon dots (gCDs) were obtained from natural organic sources by green synthesis. The effects of gCDs on the flow behavior and viscoelastic properties of mixed biopolymer dispersions and the thermophysical properties of the corresponded films were evaluated by steady and unsteady shear rheological measurements and differential scanning calorimetry (DSC) tests, respectively. The dynamic mechanical measurements were realized taking into account the parameters of temperature and relative humidity. The results indicate a significant change in the viscosity of the protein–polysaccharide dispersions and the thermomechanical properties of the corresponding film samples reinforced with higher amounts of gCDs.https://www.mdpi.com/2077-0375/12/7/695composite filmsnano additivesrheologymechanical properties |
| spellingShingle | Clarissa Murru Mohammad Amin Mohammadifar Jakob Birkedal Wagner Rosana Badía Laiño Marta Elena Díaz García High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical Studies Membranes composite films nano additives rheology mechanical properties |
| title | High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical Studies |
| title_full | High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical Studies |
| title_fullStr | High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical Studies |
| title_full_unstemmed | High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical Studies |
| title_short | High Methoxyl Pectin and Sodium Caseinate Film Matrix Reinforced with Green Carbon Quantum Dots: Rheological and Mechanical Studies |
| title_sort | high methoxyl pectin and sodium caseinate film matrix reinforced with green carbon quantum dots rheological and mechanical studies |
| topic | composite films nano additives rheology mechanical properties |
| url | https://www.mdpi.com/2077-0375/12/7/695 |
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