Enhanced Antibacterial effect of chitosan film using Montmorillonite/CuO nanocomposite

Nouri, Afsaneh; Yaraki, Mohammad Tavakkoli; Ghorbanpour, Mohammad; Agarwal, Shilpi; Gupta, Vinod Kumar

doi:10.1016/j.ijbiomac.2017.11.119

Cited by 177 publications

(67 citation statements)

References 83 publications

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“…Then, 0.1 mL diluent of the sample was spread onto nutrient agar plates and incubated at 37 • C for 24-48 h. Finally, the bacterial colonies were counted and recorded as the after-culture bacteria count. The antibacterial rate was calculated and averaged [27]:…”

Section: Antibacterial Testingmentioning

confidence: 99%

Preparation and Properties of Sodium Carboxymethyl Cellulose/Sodium Alginate/Chitosan Composite Film

2018

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A sodium alginate/chitosan solution was prepared by dissolving sodium alginate, chitosan, and glycerol in an acetic acid solution. This solution was then combined with a sodium carboxymethyl cellulose solution and the mixture was cast onto a glass plate and dried at a constant temperature of 60 • C. Then, a carboxymethyl cellulose/sodium alginate/chitosan composite film was obtained by immersing the film in a solution of a cross-linking agent, CaCl 2 , and air-drying the resulting material. First, the most advantageous contents of the three precursors in the casting solution were determined by a completely random design test method. Thereafter, a comprehensive orthogonal experimental design was applied to select the optimal mass ratio of the three precursors. The composite film obtained with sodium alginate, sodium carboxymethyl cellulose, and chitosan contents of 1.5%, 0.5%, and 1.5%, respectively, in the casting solution displayed excellent tensile strength, water vapor transmission rate, and elongation after fracture. Moreover, the presence of chitosan successfully inhibited the growth and reproduction of microorganisms. The composite film exhibited antibacterial rates of 95.7% ± 5.4% and 93.4% ± 4.7% against Escherichia coli and Staphylococcus aureus, respectively. Therefore, the composite film is promising for antibacterial food packaging applications.

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Section: Antibacterial Testingmentioning

confidence: 99%

Preparation and Properties of Sodium Carboxymethyl Cellulose/Sodium Alginate/Chitosan Composite Film

2018

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“…This result is in line with the above XRD profile (Figure 5a). The third and fourth stages, at temperature ranges 500-650 • C and 650-750 • C, respectively, corresponded to the dehydroxylation of the Mt hydroxyl groups [7,36].…”

Section: Tga Of Two Modifiers Omt and Pl-omtmentioning

confidence: 99%

“…Montmorillonite (Mt), which is a type of 2:1 layered silicate, is widely used owing to its environmentally friendly nature, natural abundance, low cost and unique structure and properties [1][2][3][4]. In recent years, Mt has attracted increasing attention, not only in enhancing mechanical, barrier and optical properties [5,6], but also in acting as a carrier of antibacterial agents in biopolymers for food packaging [7]. As Mt does not exhibit antibacterial activity in nature, it requires modification to play the role of an antibacterial agent in biodegradable materials.…”

Section: Introductionmentioning

confidence: 99%

“…Makwana [9] investigated the effects of silver-modified Mt on the physical, mechanical and antimicrobial properties of carboxymethylcellulose bionanocomposite films. Nouri [7] prepared Mt−copper oxide nanocomposites to enhance the optical, mechanical and antibacterial properties of chitosan films. Although metals or metal oxides have strong antibacterial activity, the possible side effects of silver nanoparticles on human health are mostly…”

Section: Introductionmentioning

confidence: 99%

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Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Yuan

Zhang

et al. 2019

Materials

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In this study, two types of antibacterial montmorillonites (Mt) were prepared using a facile method. The Mt modified with ε-polylysine hydrochloride (ε-PL) was named PL-Mt, while the Mt dually modified with dioctadecyl dimethylammonium chloride (D1821) and ε-PL was named PL-OMt. The results of the X-ray diffraction, Fourier-transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA) of the PL-Mt indicated that 30% ε-PL was the most suitable amount for intercalating the Mt. The particle size and distribution of the ε-PL in the solution demonstrated that the Mt d-value could not be further increased owing to the increasing ε-PL diameter. The result of the X-ray diffraction of PL-OMt displayed that ultrasonic treatment at 600 W facilitated ε-PL to intercalate into the OMt interlayer space. The PL-OMt prepared with ultrasonic treatment at 600 W exhibited antibacterial activity against Escherichia coli and Bacillus subtilis superior to that of the PL-OMt prepared with higher-power ultrasonic treatment. Thus, the addition of 30% ε-PL based on the dry Mt mass is the most suitable ratio for preparing PL-Mt, while ultrasonic treatment at 600 W is the most suitable for preparing PL-OMt. These findings may expand the application fields of ε-PL.

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“…Nanoclays disturb cell membranes due to their high electrostatic activity, but they are not biocidal per se, although their adhesion to bacteria may be useful when in combination with antimicrobials. The cation exchange capacity of clays allows antimicrobials (e.g., Ag + , Cu 2+ , and Zn 2+[ ] ions, quaternary ammonium compounds, essential oil, and oil compounds), mostly the positively charged agents, to intercalate between their nanoplatelets; cation release is then regulated by electrostatic interactions . It is worth mentioning that steric effects limit guest species to ions and small molecules.…”

Section: Inorganic Antimicrobial Nanostructuresmentioning

confidence: 99%

Nanostructured Antimicrobials in Food Packaging—Recent Advances

Azeredo

Otoni

Corrêa

et al. 2019

Biotechnology Journal

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Active food packaging systems promote better food quality and/or stability, such as by releasing antimicrobial agents into food. Advantages of adding antimicrobials to the packaging material instead of into the bulk food include controlled diffusion, reduced antimicrobial contents, and improved cost effectiveness. Nanostructured antimicrobials are especially effective due to their high specific surface area. The present review is focused on recent advances and findings on the main nanostructured antimicrobial packaging systems for food packaging purposes. Several kinds of nanostructures, including both inorganic particles and organic structures, have been proven effective antimicrobials by different mechanisms of action and with different application scopes. Moreover, there are systems containing nanocarriers to protect antimicrobials and deliver them in a controlled fashion. On the other hand, scientific data about migration of nanostructures onto food and their toxicity are still limited, requiring special attention from researchers and regulation sectors.

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Enhanced Antibacterial effect of chitosan film using Montmorillonite/CuO nanocomposite

Cited by 177 publications

References 83 publications

Preparation and Properties of Sodium Carboxymethyl Cellulose/Sodium Alginate/Chitosan Composite Film

Preparation and Properties of Sodium Carboxymethyl Cellulose/Sodium Alginate/Chitosan Composite Film

Ultrasound-Assisted Preparation, Characterization, and Antibacterial Activity of Montmorillonite Modified by ε-Polylysine Hydrochloride

Nanostructured Antimicrobials in Food Packaging—Recent Advances

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