Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry
An antibacterial and anti-oxidation composite film was prepared by a casting method using sodium alginate (SA) and apple polyphenols (APPs) as the base material and glycerol as the plasticizer. Silver nanoparticles (AgNPs) were deposited by ultrasonic-assisted electrospray method. The degree of infl...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/9/2096 |
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| author | Wenting Lan Siying Li Shiti Shama Yuqing Zhao Dur E. Sameen Li He Yaowen Liu |
| author_facet | Wenting Lan Siying Li Shiti Shama Yuqing Zhao Dur E. Sameen Li He Yaowen Liu |
| author_sort | Wenting Lan |
| collection | DOAJ |
| description | An antibacterial and anti-oxidation composite film was prepared by a casting method using sodium alginate (SA) and apple polyphenols (APPs) as the base material and glycerol as the plasticizer. Silver nanoparticles (AgNPs) were deposited by ultrasonic-assisted electrospray method. The degree of influence of the addition ratio of SA and AgNPs and different ultrasonic time on the mechanical properties, barrier properties, optical properties, and hydrophilicity of the composite film was explored. The composite films were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the SA: AgNPs ratio of 7:3 and the ultrasonic time for 30 min have the best comprehensive performance, and SA/AgNPs/APP films showed the lowest water vapor permeability value of 0.75 × 10<sup>−11</sup> g/m·s·Pa. The composite film has good strength and softness, with tensile strength (TS) and elongation at break (E) at 23.94 MPa and 29.18%, respectively. SEM images showed that the surface of the composite film was smooth and the AgNPs’ distribution was uniform. The composite film showed broad antibacterial activity, and the antibacterial activity of <i>Escherichia coli</i> (92.01%) was higher than that of <i>Staphylococcus aureus</i> (91.26%). However, due to the addition of APP, its antioxidant activity can reach 98.39%, which has a synergistic effect on antibacterial activity. For strawberry as a model, the results showed that this composite film can prolong the shelf life of strawberries for about 8 days at 4 °C, effectively maintaining their storage quality. Compared with the commonly used PE(Polyethylene film) film on the market, it has a greater fresh-keeping effect and can be used as an active food packaging material. |
| first_indexed | 2024-03-10T16:19:23Z |
| format | Article |
| id | doaj.art-364955712ee74cd1959f366f858af118 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T16:19:23Z |
| publishDate | 2020-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-364955712ee74cd1959f366f858af1182023-11-20T13:47:33ZengMDPI AGPolymers2073-43602020-09-01129209610.3390/polym12092096Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on StrawberryWenting Lan0Siying Li1Shiti Shama2Yuqing Zhao3Dur E. Sameen4Li He5Yaowen Liu6College of Food Science, Sichuan Agricultural University, Yaan 625014, ChinaCollege of Food Science, Sichuan Agricultural University, Yaan 625014, ChinaCollege of Food Science, Sichuan Agricultural University, Yaan 625014, ChinaCollege of Food Science, Sichuan Agricultural University, Yaan 625014, ChinaCollege of Food Science, Sichuan Agricultural University, Yaan 625014, ChinaCollege of Food Science, Sichuan Agricultural University, Yaan 625014, ChinaCollege of Food Science, Sichuan Agricultural University, Yaan 625014, ChinaAn antibacterial and anti-oxidation composite film was prepared by a casting method using sodium alginate (SA) and apple polyphenols (APPs) as the base material and glycerol as the plasticizer. Silver nanoparticles (AgNPs) were deposited by ultrasonic-assisted electrospray method. The degree of influence of the addition ratio of SA and AgNPs and different ultrasonic time on the mechanical properties, barrier properties, optical properties, and hydrophilicity of the composite film was explored. The composite films were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results showed that the SA: AgNPs ratio of 7:3 and the ultrasonic time for 30 min have the best comprehensive performance, and SA/AgNPs/APP films showed the lowest water vapor permeability value of 0.75 × 10<sup>−11</sup> g/m·s·Pa. The composite film has good strength and softness, with tensile strength (TS) and elongation at break (E) at 23.94 MPa and 29.18%, respectively. SEM images showed that the surface of the composite film was smooth and the AgNPs’ distribution was uniform. The composite film showed broad antibacterial activity, and the antibacterial activity of <i>Escherichia coli</i> (92.01%) was higher than that of <i>Staphylococcus aureus</i> (91.26%). However, due to the addition of APP, its antioxidant activity can reach 98.39%, which has a synergistic effect on antibacterial activity. For strawberry as a model, the results showed that this composite film can prolong the shelf life of strawberries for about 8 days at 4 °C, effectively maintaining their storage quality. Compared with the commonly used PE(Polyethylene film) film on the market, it has a greater fresh-keeping effect and can be used as an active food packaging material.https://www.mdpi.com/2073-4360/12/9/2096sodium alginateapple polyphenolstrawberry |
| spellingShingle | Wenting Lan Siying Li Shiti Shama Yuqing Zhao Dur E. Sameen Li He Yaowen Liu Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry Polymers sodium alginate apple polyphenol strawberry |
| title | Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry |
| title_full | Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry |
| title_fullStr | Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry |
| title_full_unstemmed | Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry |
| title_short | Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry |
| title_sort | investigation of ultrasonic treatment on physicochemical structural and morphological properties of sodium alginate agnps apple polyphenol films and its preservation effect on strawberry |
| topic | sodium alginate apple polyphenol strawberry |
| url | https://www.mdpi.com/2073-4360/12/9/2096 |
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