Ultrasound promoted synthesis and properties of chitosan nanocomposites containing carbon nanotubes and silver nanoparticles

Bibi, Saira; Jamil, Arifa; Yasin, Tariq; Rafiq, M. A.; Nawaz, Mohsan; Price, Gareth J.

doi:10.1016/j.eurpolymj.2018.06.004

Cited by 18 publications

(10 citation statements)

References 54 publications

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“…Clearly, 30 min of ultrasound is the best amount of time for enhancing the uniformity of nano-silver in SA/AgNPs/APP composite film, enhancing the rigidity and ductility of the composite film. It should be noted that the measured values depend on the sample moisture content, cross-linking density, and other properties of the matrix, but the trend here is still valid [ 31 ]. When the ultrasonic treatment time reached the threshold value (40 min), the dense and uniform network structure of the composite film is disturbed, resulting in the aggregation of nanoparticles, which has a negative effect on the mechanical properties of the composite film [ 23 ].…”

Section: Resultsmentioning

confidence: 97%

“…Compared with different ultrasound times, the value of L*, a*, and b* of the composite film increased first and then decreased after ultrasound treatment, and 30 min is the peak and turning point. The dispersion of AgNPs in the SA/APP matrix promoted by ultrasound was uniform, and the nanoparticles were well separated from each other [ 31 ]. First, ultrasound resulted in more uniform color, while longer ultrasound time led to agglomeration of nanoparticles, leading to color change.…”

Section: Resultsmentioning

confidence: 99%

“…When a certain amount of AgNPs was added, the TS value of the blend film decreased significantly, which may be due to the heterogeneity of the material structure network caused by the agglomeration of nanoparticles. The agglomeration phenomenon may be caused by the decrease in the distance between Ag particles, the decrease in aggregation factor (van der Waals force attraction) and dispersion factor (electrostatic or spatial repulsion), which leads to irreversible agglomeration and the decrease in strength [ 31 ]. In addition, it was closely related to the distribution and density of intermolecular and intramolecular interactions between polymer chains in the film matrix [ 33 ].…”

Section: Resultsmentioning

confidence: 99%

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Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry

Lan

Shama

et al. 2020

Polymers

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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 × 10−11 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 Escherichia coli (92.01%) was higher than that of Staphylococcus aureus (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.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry

Lan

Shama

et al. 2020

Polymers

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“…In two other studies, Bibi et al [ 116 ] used a prompt and simple procedure to prepare functional chitosan nanocomposite films incorporating silver nanoparticles, gold nanoparticles, and CNTs with the support of ultrasound-assisted in situ synthesis. In both cases, a slight increase was observed in TS, toughness, and EAB% after CNTs inclusion in the composite, showing a good inference between different nanoparticles [ 116 , 117 ].…”

Section: Nanotechnology As Reinforcementmentioning

confidence: 96%

Understanding the Barrier and Mechanical Behavior of Different Nanofillers in Chitosan Films for Food Packaging

et al. 2021

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The continuous petroleum-based plastics manufacturing generates disposal issues, spreading the problem of plastic pollution and its rise in the environment. Recently, innovative techniques and scientific research promoted biopolymers as the primary alternative for traditional plastics, raising and expanding global bioplastic production. Due to its unmatched biological and functional attributes, chitosan (Ch) has been substantially explored and employed as a biopolymeric matrix. Nevertheless, the hydrophilicity and the weak mechanical properties associated with this biopolymer represent a significant intrinsic restriction to its implementation into some commercial applications, namely, in food packaging industries. Distinct methodologies have been utilized to upgrade the mechanical and barrier properties of Ch, such as using organic or inorganic nanofillers, crosslinkers, or blends with other polymers. This review intends to analyze the most recent works that combine the action of different nanoparticle types with Ch films to reinforce their mechanical and barrier properties.

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“…Recently, ultrasound has emerged as a novel and eco-friendly technique for nanomaterial synthesis in organic, inorganic and biomedical fields [13] , [14] , [15] , [16] , [17] , [18] , [19] . Due to the lack of availability of large-scale ultrasonic reactors, progressing ultrasonic techniques into industrial scale processes remains a big challenge [20] .…”

Section: Introductionmentioning

confidence: 99%

Sonosynthesis of nanobiotics with antimicrobial and antioxidant properties

Zhu

Wen

Bhangu

et al. 2022

Ultrasonics Sonochemistry

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Ultrasound promoted synthesis and properties of chitosan nanocomposites containing carbon nanotubes and silver nanoparticles

Cited by 18 publications

References 54 publications

Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry

Investigation of Ultrasonic Treatment on Physicochemical, Structural and Morphological Properties of Sodium Alginate/AgNPs/Apple Polyphenol Films and Its Preservation Effect on Strawberry

Understanding the Barrier and Mechanical Behavior of Different Nanofillers in Chitosan Films for Food Packaging

Sonosynthesis of nanobiotics with antimicrobial and antioxidant properties

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