The effect of preparation temperature on the mechanical and antibacterial properties of poly(vinyl alcohol)/silver nitrate films

Sedlařík, Vladimír; Galya, Tsermaa; Sedlaříková, Jana; Valášek, Pavel; Sáha, Petr

doi:10.1016/j.polymdegradstab.2009.11.017

Cited by 38 publications

(21 citation statements)

References 14 publications

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“…La plata es uno de los aditivos con características antimicrobianas mayoritariamente utilizado en diversos materiales poliméricos como el agar (Ghosh et al, 2010;Rhim et al, 2013), alcohol de polivinilo (Bryaskova et al, 2010;Sedlarik et al, 2010), gelatina (Kanmani y Rhim, 2014) y mezclas de quitosan-celulosa (Lin et al, 2015), almidón-arcilla (Abreu et al, 2015) o quitosan-glutaraldehido (Vimala et al, 2011) para aplicaciones de empacado de alimentos (Martínez-Abad et al, 2012). Sin embargo, no hay casi estudios concernientes al desarrollo de BP a base de GBA cargadas de AgNPs y su comportamiento físico-mecánico.…”

Section: Introductionunclassified

Biopelículas de Gelana Cargadas con Nanopartículas de Plata: Propiedades Físico Mecánicas, Antimicrobianas y de Barrera

2017

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ResumenSe elaboraron biopelículas a base de gelana de bajo acilo cargadas con nanopartículas de plata (AgNPs) evaluando sus propiedades físico-mecánicas, antimicrobianas y de barrera, después de un almacenamiento de 3 semanas. La actividad antimicrobiana fue evaluada frente a bacterias de origen alimentario (Escherichia coli y Staphylococcus aureus) y dos hongos (Aspergillus sp y Penicillium sp). Los resultados permitieron determinar que el tiempo de almacenamiento influye en todas las propiedades evaluadas. Al incrementar el tiempo de almacenamiento se apreció una disminución en la resistencia a la tensión y en la transparencia. Además se presentó un incremento en el poder antimicrobiano y la permeabilidad al vapor de agua. Este comportamiento probablemente obedece a la lixiviación de iones plata, lo cual disminuye el número de enlaces presentes en la matriz polimérica. Tales resultados son prometedores y sugieren la posibilidad de utilizar biopelículas a base de gelana de bajo acilo como sistema de vehiculización de AgNPs para su liberación gradual manteniendo un efecto antimicrobiano sostenido. Palabras clave: biopelículas; goma gelana; nanopartículas de plata; permeabilidad; resistencia a la tensión Biofilms of Gellan Loaded with Silver Nanoparticles: Physico Mechanical, Antimicrobials and Barrier Properties AbstractBiofilms based on low acyl gellan loaded with silver nanoparticles (AgNPs) were tested, evaluating their physical-mechanical, antimicrobial and barrier properties after 3 weeks of storage. The antimicrobial activity was evaluated against food-borne bacteria (Escherichia coli and Staphylococcus aureus) and two fungi (Aspergillus sp and Penicillium sp). The results showed that the storage time influence all the evaluated properties. Increasing the storage time decreases the tensile strength and transparency values. Also, the antimicrobial power and the water vapor permeability increased. This behavior is probably due to the leaching of silver ions, which decreases the number of bonds present in the polymer matrix. Such results are promising and suggest the possibility of using biofilms based on low acyl gellan as a system for the vehiculation of AgNPs for their gradual release while maintaining a sustained antimicrobial effect.

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Section: Introductionunclassified

Biopelículas de Gelana Cargadas con Nanopartículas de Plata: Propiedades Físico Mecánicas, Antimicrobianas y de Barrera

2017

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“…It can be the reason for better resistance of gram negative bacteria to an antibacterialagent. 15,49 …”

Section: Resultsmentioning

confidence: 99%

“…13 It has been determined that the free silver ion combining the thiol (SH) groups of cellular components such as protein causes inactivation of bacteria. [13][14][15][16][17][18] The presence of micro-organisms such as bacteria, fungi or viruses on the coated substrates has several adverse consequences including aesthetics (discoloration of the coating), risks to the health and hygiene, the malodor and microbial corrosion in the case of metallic substrates. 19 In order to eliminate such disadvantages and increase the longevity and efficiency of coatings, the microcapsules containing nanosilver have been developed.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of latex based antibacterial acrylate polymer/nanosilver via in situ miniemulsion polymerization

2011

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Silver nanoparticles were incorporated into poly-{methyl methacrylate-butyl acrylate-acrylic acid}using two different approaches. The first approach was based on dispersing the nanosilver particles in acrylic latex (previously synthesized by the emulsion polymerization) and the second is the in situ polymerization of acrylate monomers in the presence of silver nanoparticles by miniemulsion polymerization. Miniemulsion polymerization can yield a better dispersion of nanosilver in the polymeric particles because organic particles can be dispersed directly in the monomer droplets becoming encapsulated upon polymerization. Morphological investigations were performed using SEM and TEM. FTIR and thermal analyses revealed the silver nanoparticles to be located in the polymeric structure of latex. The nanocomposite latex was compared with the neat latex of the same monomer structure. A comparison of these results showed an increase in the degradation temperature and glass transition temperature (T g ) compared to the blank latex. The antibacterial properties were determined using the disc diffusion method against both gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli). The nanocomposite synthesized via in situ miniemulsion polymerization showed highly potent antibacterial activity toward both gram-positive and gram-negative bacteria comparing the neat latex and the blended nanocomposite, which makes it useful for a wide range of biomedical and general applications.

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“…Activity on inactivation of Ag/TiO 2 /PVDF membrane was investigated through agar diffusion method [15,25]. The test was conducted in the following way: Briefly, the tested bacteria (S. aureus, ATCC100419 and E. coli, ATCC090401) were incubated in a nutrient broth (NB, pH 7.4 ± 0.2) at 37 • C overnight with shaking speed of 160 rpm.…”

Section: Inactivation Of Bacteriamentioning

confidence: 99%

Influence of Ag/TiO2 nanoparticle on the surface hydrophilicity and visible-light response activity of polyvinylidene fluoride membrane

Yan

Shao

et al. 2015

Applied Surface Science

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The effect of preparation temperature on the mechanical and antibacterial properties of poly(vinyl alcohol)/silver nitrate films

Cited by 38 publications

References 14 publications

Biopelículas de Gelana Cargadas con Nanopartículas de Plata: Propiedades Físico Mecánicas, Antimicrobianas y de Barrera

Biopelículas de Gelana Cargadas con Nanopartículas de Plata: Propiedades Físico Mecánicas, Antimicrobianas y de Barrera

Synthesis of latex based antibacterial acrylate polymer/nanosilver via in situ miniemulsion polymerization

Influence of Ag/TiO2 nanoparticle on the surface hydrophilicity and visible-light response activity of polyvinylidene fluoride membrane

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