ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXING
Antibacterial thermoplastic starch-chitosan based materials were successfully prepared by melt-mixing. The effect of chitosan modification (quaternization and grafting of long carbon chains) on the properties of the materials was also studied. All the ensuing materials were characterized in terms of...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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North Carolina State University
2012-06-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_Tome_FSCSNF_Antibacterial_Thermoplastic_Starch_Chitosan/1605 |
| _version_ | 1818475771058978816 |
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| author | Liliana C. Tomé, Susana C. M. Fernandes, Patrizia Sadocco, Jessica Causio, Armando J. D. Silvestre, Carlos Pascoal Neto, Carmen S. R. Freire |
| author_facet | Liliana C. Tomé, Susana C. M. Fernandes, Patrizia Sadocco, Jessica Causio, Armando J. D. Silvestre, Carlos Pascoal Neto, Carmen S. R. Freire |
| author_sort | Liliana C. Tomé, |
| collection | DOAJ |
| description | Antibacterial thermoplastic starch-chitosan based materials were successfully prepared by melt-mixing. The effect of chitosan modification (quaternization and grafting of long carbon chains) on the properties of the materials was also studied. All the ensuing materials were characterized in terms of thermal stability, crystalline structure, mechanical performance, and antibacterial activity. The incorporation of chitosan and its derivatives into the thermoplastic starch matrices resulted in an increment in tensile strengths (up to 85%); however for higher chitosan contents (5 and 7.5 wt.%), a decrease on the Young’s modulus (around 50%) was observed, together with an increment in the elongation at break, which can be attributed to the prevention of the retrogradation process. Finally, the thermoplastic starch materials incorporated with 7.5 wt% of the unmodified chitosan and of the water-soluble chitosan derivative had partial (about 20% reduction of CFU) and total bactericidal effect against S. aureus.Keywords |
| first_indexed | 2024-12-10T09:16:53Z |
| format | Article |
| id | doaj.art-fb91294fcabe46be9393c99a80129148 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-12-10T09:16:53Z |
| publishDate | 2012-06-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-fb91294fcabe46be9393c99a801291482022-12-22T01:54:51ZengNorth Carolina State UniversityBioResources1930-21262012-06-017333983409ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXINGLiliana C. Tomé,Susana C. M. Fernandes,Patrizia Sadocco,Jessica Causio,Armando J. D. Silvestre,Carlos Pascoal Neto,Carmen S. R. FreireAntibacterial thermoplastic starch-chitosan based materials were successfully prepared by melt-mixing. The effect of chitosan modification (quaternization and grafting of long carbon chains) on the properties of the materials was also studied. All the ensuing materials were characterized in terms of thermal stability, crystalline structure, mechanical performance, and antibacterial activity. The incorporation of chitosan and its derivatives into the thermoplastic starch matrices resulted in an increment in tensile strengths (up to 85%); however for higher chitosan contents (5 and 7.5 wt.%), a decrease on the Young’s modulus (around 50%) was observed, together with an increment in the elongation at break, which can be attributed to the prevention of the retrogradation process. Finally, the thermoplastic starch materials incorporated with 7.5 wt% of the unmodified chitosan and of the water-soluble chitosan derivative had partial (about 20% reduction of CFU) and total bactericidal effect against S. aureus.Keywordshttp://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_Tome_FSCSNF_Antibacterial_Thermoplastic_Starch_Chitosan/1605Thermoplastic starchChitosanAmphiphilic and water-soluble chitosan derivativesCompoundingMelting-mixingThermal stabilityMechanical propertiesAntibacterial activity |
| spellingShingle | Liliana C. Tomé, Susana C. M. Fernandes, Patrizia Sadocco, Jessica Causio, Armando J. D. Silvestre, Carlos Pascoal Neto, Carmen S. R. Freire ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXING BioResources Thermoplastic starch Chitosan Amphiphilic and water-soluble chitosan derivatives Compounding Melting-mixing Thermal stability Mechanical properties Antibacterial activity |
| title | ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXING |
| title_full | ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXING |
| title_fullStr | ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXING |
| title_full_unstemmed | ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXING |
| title_short | ANTIBACTERIAL THERMOPLASTIC STARCH-CHITOSAN BASED MATERIALS PREPARED BY MELT-MIXING |
| title_sort | antibacterial thermoplastic starch chitosan based materials prepared by melt mixing |
| topic | Thermoplastic starch Chitosan Amphiphilic and water-soluble chitosan derivatives Compounding Melting-mixing Thermal stability Mechanical properties Antibacterial activity |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_07_3_Tome_FSCSNF_Antibacterial_Thermoplastic_Starch_Chitosan/1605 |
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