Characterization of polyvinyl alcohol/starch composite films incorporated with p-coumaric acid modified chitosan and chitosan nanoparticles: A comparative study
| Autor: | Wenqiao Meng, Xin Zhang, Guohui Wang, Meng Zhang, Dong Wang, Yue Zhou, Zhonghua Wang, Shaoxiang Lee |
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| Rok vydání: | 2021 |
| Předmět: |
Staphylococcus aureus
Materials science Coumaric Acids Polymers and Plastics Starch Nanoparticle 02 engineering and technology Gram-Positive Bacteria 010402 general chemistry 01 natural sciences Polyvinyl alcohol Antioxidants Chitosan chemistry.chemical_compound X-Ray Diffraction Tensile Strength Ultimate tensile strength Escherichia coli Materials Chemistry medicine Thermal stability Aqueous solution Organic Chemistry Food Packaging Water 021001 nanoscience & nanotechnology Anti-Bacterial Agents 0104 chemical sciences Steam Solubility chemistry Polyvinyl Alcohol Nanoparticles Swelling medicine.symptom 0210 nano-technology Nuclear chemistry |
| Zdroj: | Carbohydrate Polymers. 262:117930 |
| ISSN: | 0144-8617 |
| Popis: | In this paper, polyvinyl alcohol/starch composite films with p-coumaric acid modified chitosan (P-CS) and chitosan nanoparticles (P-CSNPs) at different concentrations were successfully prepared. The films were compared for their mechanical, thermal, physical, antioxidant, antibacterial, cytotoxicity and optical barrier properties. The results suggested that P-CS could significantly increase the tensile strength (TS) of the film from 15.67 MPa to a maximum of 24.32 MPa. The compact structure of P-CSNPs film prevented water diffusion, reducing the water amount within. Both films showed a reduction in water solubility, the extent of swelling, and water vapor transmittance. Specifically, P-CSNPs films showed better thermal stability while P-CS films revealed higher antioxidant activity. Besides, the P-CS films exhibited excellent transparency and good ultraviolet-barrier at 200-280 nm. P-CSNPs films demonstrated higher antibacterial activity on both Gram-negative and Gram-positive bacteria. Additionally, P-CS films were less cytotoxic compared to P-CSNPs films. |
| Databáze: | OpenAIRE |
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