Antibacterial properties of LDPE nanocomposite films in packaging of UF cheese

Beigmohammadi, Faranak; Peighambardoust, Seyed Hadi; Hesari, Javad; Azadmard‐Damirchi, Sodeif; Khosrowshahi, Nader Karimian

doi:10.1016/j.lwt.2015.07.059

Cited by 107 publications

(62 citation statements)

References 24 publications

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“…Ag exchanged cloisite 30B was obtained similar to the above procedure, 0.02 mol/L AgNO 3 solution was used instead of CuSO 4 solution. Similar to melt mixing procedure used by other researchers (17)(18)(19)(20), a blend of 0.1% (w/w) mineral oil, 4% PE-g-MA, 4% metal nanoparticles-cloisite 30B and 92 % LDPE resins was introduced to a corotating twin screw extruder (SMPLATEK, TEK 25 Model, South Korea) with 20 mm of screw diameter. The temperature profile at different area of the twinscrew extruder was 135,180,190,200,210,210,210, and 225 °C.…”

Section: Methodsmentioning

confidence: 99%

“…For aging, samples were stored at 30 ºC, 5h, and refrigerated at 4±0.5 ºC. The physicochemical characteristics of UF cheese before inoculating by pure culture of coliforms were determined (9,10). …”

Section: Methodsmentioning

confidence: 99%

“…produced LDPE polymer incorporated with different percentages of Ag-NP, CuO-NP and ZnO-NP by extrusion method for packaging of UF cheese. Results showed metal nanoparticle at a maximum content of 1% could have antibacterial effects on coliform bacteria (9). Peighambardoust …”

Section: Introductionmentioning

confidence: 99%

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Inhibition of Coliform Bacteria in Ultra-Filtrated Cheese Packed in Nanocomposite Films Containing Cloisite30B- Metal Nanoparticles

2018

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A B S T R A C TBackground and Objectives: Antimicrobial active packaging with metallic nanoparticles is used as antimicrobial agent in the packaging of food. This study considers the coliform retarding ability of antimicrobial packaging in ultra-filtrated (UF) cheese. Materials and Methods:Plastic films based on low-density polyethylene containing organoclay (cloisite 30B) and different percentages of Ag and CuO nanoparticles produced by extrusion method. Coliform bacteria growth in UF cheese was investigated. The release of nanoparticles from nanocomposite into a food simulant was also assessed.Results: An amount of 3.17-log cfu/g and 0.75-log cfu/g reduction for coliform bacteria obtained for nanocomposite and control films, respectively after four weeks of storage at 4 °C. Nanocomposite film with 1.3% Ag and 2.7% CuO in LDPE matrix introduced as optimum point by Design Expert 7.1.5 software. Microbial model for decreasing growth of coliform bacteria in this product was also determined. Validation of optimum point was carried out using a one-way ANOVA. It was shown that ther is a non-significant (p>0.05) difference with its repeat and a significant (p<0.05) difference with the pure film. Conclusions:Plastic nanocomposite films containing nanoparticle of organoclay and metal can decrease the severity of food processing and application of chemical preservatives in the food industries.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Inhibition of Coliform Bacteria in Ultra-Filtrated Cheese Packed in Nanocomposite Films Containing Cloisite30B- Metal Nanoparticles

2018

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“…7,8 Já existem no mercado diversos polímeros convencionais com propriedades antimicrobianas e sendo aplicados em embalagens. 5,7,8,[14][15][16][17][18][19] Porém, devido à biodegradação lenta pelo meio ambiente dessa classe de polímeros é que se preconiza o estudo e aplicação de polímeros biodegradáveis. A proposta de adicionar compostos antimicrobianos em polímeros biodegradáveis tem como objetivo principal aumentar a vida útil de produtos alimentícios, cosméticos e medicamentos, mas utilizando esta classe de polímeros como um diferencial ambiental.…”

Section: Introductionunclassified

Antimicrobial Biodegradable Polymer Through Additivation With Zinc Based Compounds

et al. 2018

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publicado na web em 01/02/2018 ANTIMICROBIAL BIODEGRADABLE POLYMER THROUGH ADDITIVATION WITH ZINC BASED COMPOUNDS. Antimicrobial packaging is a promising type of active packaging, which has an antimicrobial agent incorporated into the polymer matrix, capable to eliminate or inhibit deteriorating and/or pathogenic microorganisms. The zinc compounds are antimicrobial agents commonly used to confer this feature. The objective of this work was to evaluate the antimicrobial activity of biodegradable Ecoflex ® films with 1% and 2% (w/w) zinc oxide nanoparticles (ZnO NPs) and 1% and 2% (w/w) glass microparticles doped with ionic zinc (Zn MCs), against Staphylococcus aureus and Escherichia coli. The sample's biodegradation in soil also were studied. Microbiological results showed that biodegradable polymeric films obtained were effective to inhibit and/or kill S. aureus and E. coli at the initial concentration of 10 4 CFU.mL -1 after 24 h of contact. When evaluated the biodegradation of the polymers containing the additives, the results showed that the addition of zinc compounds to the biodegradable polymer did not affect its biodegradability characteristic. The antimicrobial biodegradable films developed have potential application to the food packaging industry.Keywords: biodegradable polymers; Ecoflex ® ; zinc compounds; antimicrobial activity; biodegradation. INTRODUÇÃOA necessidade de prolongar a vida útil dos alimentos demanda pesquisas e inovações que ofereçam soluções no segmento de embalagens, por isso essa temática apresenta um significativo crescimento e relevância. Tendências atuais sugerem o desenvolvimento de embalagens funcionais contendo agentes antimicrobianos capazes de inibir ou até mesmo causar a morte de microrganismos deteriorantes e/ou patogênicos e embalagens ambientalmente favoráveis às quais possuem um baixo nível de impacto ambiental. 1 O controle dos agentes deteriorantes e/ou patogênicos torna-se indispensável, garantindo que alimentos de qualidade cheguem aos consumidores finais. Assim, o emprego de embalagens antimicrobianas, as chamadas embalagens ativas, apresenta-se como uma alternativa interessante no que diz respeito à preservação dos alimentos. Estas embalagens ativas contribuem para o retardo do processo de deterioração, aumentando a vida útil dos alimentos acondicionados, proporcionando a manutenção da qualidade e segurança alimentar. 2-5O uso de micropartículas e nanopartículas antimicrobianas tem se mostrado uma alterativa promissora no controle da contaminação de alimentos ocasionada por bactérias e fungos patogênicos. Este controle é de grande interesse para a saúde pública e para mitigar grandes prejuízos econômicos devido ao descarte prematuro dos alimentos contaminados por estes microrganismos nocivos à saúde humana e animal. 4,6 Deste modo, recomenda-se a incorporação de agentes antimicrobianos à diferentes matrizes poliméricas empregadas na fabricação de embalagens de alimentos, de modo a inibir ou até mesmo matar os microrganismos presentes em alimentos e demais superfície...

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“…Polymeric films and also synthetic polymer composite materials play an important role in food packaging and used as structural components because their mechanical properties, versatile processing techniques, chemical inertness and stability, preservatives, oxygen absorbers, water vapor absorbers and reduced cost [2][3][4][5][6]. Moreover the final properties of polymer nanocomposites depend strongly on the properties of the filler such as mechanical, thermal, optical and electrical properties of polymers.…”

Section: Introductionmentioning

confidence: 99%

<span>A study on properties of polymeric films incorporated with silver-coatedTiO<sub>2</sub> nano particles</span>

nasab

Jalili

2017

Proceedings of the 21st International Electronic Conference on Synthetic Organic Chemistry

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In this research, Low-density polyethylene (LDPE) nanocomposite polymeric films containing different concentrations of silver (Ag) nanoparticles (NPs) and TiO2 were manufactured via extrusion and subsequently characterized. Silver/TiO2 surfaces have advantageous properties such as visible light photo catalysis, biological compatibility, and antimicrobial activity. The synthesis of polymer-Ag NPs and Ag NPs on TiO2 are also summarized because of their industrial and environmental importance [1]. In the present study, the morphological, mechanical, and optical performance of the nanocomposite polymeric films is investigated.

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Antibacterial properties of LDPE nanocomposite films in packaging of UF cheese

Cited by 107 publications

References 24 publications

Inhibition of Coliform Bacteria in Ultra-Filtrated Cheese Packed in Nanocomposite Films Containing Cloisite30B- Metal Nanoparticles

Inhibition of Coliform Bacteria in Ultra-Filtrated Cheese Packed in Nanocomposite Films Containing Cloisite30B- Metal Nanoparticles

Antimicrobial Biodegradable Polymer Through Additivation With Zinc Based Compounds

<span>A study on properties of polymeric films incorporated with silver-coatedTiO<sub>2</sub> nano particles</span>

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