Characterization of Agar-CMC/Ag-MMT nanocomposite and evaluation of antibacterial and mechanical properties for packaging applications

Makwana, Dipak; Castaño, Johanna; Somani, Rajesh S.; Bajaj, Hari C.

doi:10.1016/j.arabjc.2018.08.017

Cited by 58 publications

(17 citation statements)

References 32 publications

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“…The first weight loss occurred at 50–120 °C with a maximum decomposition temperature of 55–60 °C due to moisture evaporation. A significant weight loss was observed at 165–450 °C with a maximum decomposition temperature of ∼270 °C due to thermal decomposition of both the glycerol and polymer. , Detailed results for thermogravimetric analysis are summarized in Table S5 (Supporting Information). The T onset / T end temperatures were almost the same for all films, but the T 0.5 (50% decomposition) increased when alizarin and GSE were added, probably due to the filler’s thermal stability.…”

Section: Resultsmentioning

confidence: 99%

“…CMC makes a very transparent and flexible film with moderate tensile strength, but its low water barrier properties limit its industrial use. , One way to solve the problem of CMC films is to make a composite film by blending it with other suitable biopolymers such as agar. Agar, a water-resistant biopolymer, also has an excellent film-forming ability with a structure chemically similar to cellulose, so mixing these two carbohydrates is expected to form a compatible film with improved film properties. , Previously, CMC and agar blend films have been tested to prepare antimicrobial functional films by adding essential oil, silver nanoparticles with montmorillonite, and shikonin with cellulose nanocrystals. − …”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Carboxymethyl Cellulose/Agar-Based Functional Films Hybridized with Alizarin and Grapefruit Seed Extract

Roy

Rhim

2021

ACS Appl. Bio Mater.

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Carboxymethyl cellulose/agar-based functional halochromic films were fabricated by adding alizarin and grapefruit seed extract (GSE). The fillers were evenly dispersed in the polymer matrix to form compatible composite films. The addition of alizarin has improved the film's mechanical strength (20%) and water resistance (40%) with potent antioxidant and excellent color indicating properties. In contrast, GSE has imparted strong antibacterial and antioxidant activities to the film. Also, the addition of alizarin and GSE slightly improved the water vapor barrier properties but did not affect the thermal stability of the film. The composite film also exhibited UV blocking properties with adequate transparency. The composite film showed an excellent pH-dependent color change with color reversibility and color stability and a volatile gas detection function. The film also showed potent antimicrobial activity against foodborne pathogenic bacteria, Escherichia coli and Listeria monocytogenes, and showed an intense antioxidant action.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of Carboxymethyl Cellulose/Agar-Based Functional Films Hybridized with Alizarin and Grapefruit Seed Extract

Roy

Rhim

2021

ACS Appl. Bio Mater.

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“…Hence, the tendency to form aggregates is higher with increasing the Cu nanoparticle size in the TPU matrix. On the other hand, the incorporation of copper nanoparticles could promote the interconnection of hard elements forming paths, producing a change in the distribution of the compound which translates into an increase in the toughness of the material [ 38 , 39 ]. Copper-polyurethane composites prepared with nanoparticles were found to be more resistant, with an increase of TS of 23% and flexible materials (>70% of EB), than neat TPU ( Table 4 ).…”

Section: Resultsmentioning

confidence: 99%

Copper-Polyurethane Composite Materials: Particle Size Effect on the Physical-Chemical and Antibacterial Properties

et al. 2020

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In this work, thermoplastic polyurethane (TPU) composites incorporated with 1.0 wt% Cu particles were synthesized by the melt blending method. The effect of the incorporated copper particle size on the antibacterial, thermal, rheological, and mechanical properties of TPU was investigated. The obtained results showed that (i) the addition of copper particles increased the thermal and mechanical properties because they acted as co-stabilizers of polyurethane (PU) (ii) copper nanoparticles decreased the viscosity of composite melts, and (iii) microparticles > 0.5 µm had a tendency to easily increase the maximum torque and formation of agglomerates. SEM micrographics showed that a good mixture between TPU and copper particles was obtained by the extrusion process. Additionally, copper-TPU composite materials effectively inhibited the growth of the Gram-negative Escherichia coli and the Gram-positive Staphylococcus aureus. Considering that the natural concentration of copper in the blood is in the range of 0.7–0.12 mg/L and that the total migration value of copper particles from TPU was 1000 times lower, the results suggested that TPU nanocomposites could be adequately employed for biomedical applications without a risk of contamination.

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“…34,35 In this regard, the combined use of CMC and agar can be an excellent choice for creating a composite film that can minimize the limitations of each biopolymer with improved properties. 36,37 We intended to prepare a halochromic film by integrating CNC and shikonin to CMC in the present work. This is the first report using CNC and shikonin to prepare a CMC/agar-based intelligent composite film to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Carboxymethyl Cellulose and Agar-Based Multifunctional Films Reinforced with Cellulose Nanocrystals and Shikonin

Roy

Kim

Rhim

2021

ACS Appl. Polym. Mater.

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Multifunctional carboxymethyl cellulose/agar-based smart films were fabricated combining cellulose nanocrystals (CNC) separated from onion peel and shikonin isolated from the roots of Lithospermum erythrorhizon. The CNC had a nanosized crystal structure with a length and width of 225.6 ± 42.4 and 10.2 ± 2.2 nm, respectively, having an aspect ratio of 22.1. The CNC and shikonin were consistently dispersed in the polymer matrix. The integration of CNC significantly improved physical properties, for instance, mechanical, water resistance, and optical properties. The addition of shikonin provided functional properties such as pH-responsive color change, antioxidant and antibacterial properties without significant change in the water vapor permeability, and thermal stability of the film. The films also exhibited high light transmittance with increased UV-light barrier properties. The composite film also showed potent antimicrobial and antioxidant activities. The composite film with enhanced physical and functional properties has high potential for quality detection in active food packaging applications.

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Characterization of Agar-CMC/Ag-MMT nanocomposite and evaluation of antibacterial and mechanical properties for packaging applications

Cited by 58 publications

References 32 publications

Fabrication of Carboxymethyl Cellulose/Agar-Based Functional Films Hybridized with Alizarin and Grapefruit Seed Extract

Fabrication of Carboxymethyl Cellulose/Agar-Based Functional Films Hybridized with Alizarin and Grapefruit Seed Extract

Copper-Polyurethane Composite Materials: Particle Size Effect on the Physical-Chemical and Antibacterial Properties

Synthesis of Carboxymethyl Cellulose and Agar-Based Multifunctional Films Reinforced with Cellulose Nanocrystals and Shikonin

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