Silver polymeric nanocomposites as advanced antimicrobial agents: Classification, synthetic paths, applications, and perspectives

Dallas, Panagiotis; Sharma, Virender K.; Zbořil, Radek

doi:10.1016/j.cis.2011.05.008

Cited by 568 publications

(314 citation statements)

References 194 publications

Supporting

Mentioning

300

Contrasting

Unclassified

Order By: Relevance

“…Some systems, such as salts [36], zeolites [37] or ionomers [38], contain initially silver (+1) species, and can release them by simple dissolution or ion exchange. It is not the case with metallic Ag 0 nanoparticles.…”

Section: Role Of Ag + Speciesmentioning

confidence: 99%

Antibacterial activity of silver nanoparticles: A surface science insight

2015

View full text Add to dashboard Cite

Summary Silver nanoparticles constitute a very promising approach for the development of new antimicrobial systems. Nanoparticulate objects can bring significant improvements in the antibacterial activity of this element, through specific effect such as an adsorption at bacterial surfaces. However, the mechanism of action is essentially driven by the oxidative dissolution of the nanoparticles, as indicated by recent direct observations. The role of Ag + release in the action mechanism was also indirectly observed in numerous studies, and explains the sensitivity of the antimicrobial activity to the presence of some chemical species, notably halides and sulfides which form insoluble salts with Ag + . As such, surface properties of Ag nanoparticles have a crucial impact on their potency, as they influence both physical (aggregation, affinity for bacterial membrane, etc.) and chemical (dissolution, passivation, etc.) phenomena. Here, we review the main parameters that will affect the surface state of Ag NPs and their influence on antimicrobial efficacy. We also provide an analysis of several works on Ag NPs activity, observed through the scope of an oxidative Ag + release.

show abstract

Section: Role Of Ag + Speciesmentioning

confidence: 99%

Antibacterial activity of silver nanoparticles: A surface science insight

2015

View full text Add to dashboard Cite

show abstract

“…The antibacterial agents can make a longer shelf life and increase the food safety by delaying or preventing the growth of microorganisms on the food packing film surface [7]. Among these agents, silver nanoparticles (AgNPs) have strong antibacterial activity and broad-spectrum toxicity to microorganism as well as the unique catalytic, optic, and electronic properties, and thermal stability [29][30][31][32]. They can be incorporated into a wide range of packing materials from petroleum-based plastics such as polyethylene, polypropylene, polystyrene and nylon to biodegradable polymers such as chitosan, starch, and other synthetic biopolymers [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Thermal, Mechanical and Antibacterial Properties of Ldpe/Starch Bio-Based Polymer Blends for Food Packing Applications

Yamak¹

2016

Journal of the Turkish Chemical Society, Section A: Chemistry

View full text Add to dashboard Cite

Abstract:In this study, low density polyethylene (LDPE) was melt-blended with starch using twin screw extruder to form biodegradable polymer blends. The LDPE/starch blend films used in food packing were obtained by hot pressing of the granules produced by extrusion process. The starch content was varied from 0 to 40 wt% of LDPE. To provide fine starch dispersion, glycerol and zinc stearate were used as plasticizer and compatibilizer, respectively. The effect of starch content on the properties of LDPE film was investigated. A good dispersion was achieved for low starch contents (10 and 20 wt%), but agglomeration of the starch particles occurred in the presence of high amounts of starch (>20 wt%). The addition of starch to LDPE reduced the tensile strength, elongation at break, crystallinity, and water resistance of LDPE. This decline in the LDPE properties was dramatic when the starch content was increased to 30 wt% in the blend. In addition, silver nanoparticles as antibacterial agent were incorporated to the biodegradable LDPE blends where LDPE/starch weight ratio of 60/40. The effects of these nanoparticles on morphological, mechanical, thermal and water resistance properties of the LDPE/starch biodegradable blends were investigated. It was observed that the incorporation of nanoparticles to the LDPE/starch blend was completely changed the morphology of the film, and accordingly, the mechanical, thermal, and water resistance properties were varied depending on the silver nanoparticle content in LDPE/starch blend film. Moreover, antibacterial activities of the nanocomposite films against gram-negative bacteria (E. coli) and grampositive bacteria (S. aureus) were determined by measuring the inhibition zone around each film. However, the nanocomposite films did not show any antibacterial activities in the presence of silver nanoparticles as an antibacterial agent.

show abstract

“…These applications require appropriate chemical functionalization of the nanoparticles with organic molecules or their incorporation into polymer matrices (Dallas, Sharma, Zboril, 2011). Among the numerous types of nanoparticles that have been used to decorate polymers, silver nanoparticles (AgNPs) are the most researched, due to their electronic properties (Líu et al, 2010;Tricoli, Pratsinis, 2009;Chen et al, 2010), and optical (Zeng et al, 2007), catalytic (Severin et al., 2007; Signori et al, 2010) and antimicrobial activities (Panacek et al, 2006;Kvitek et al, 2008;Prema, Raju, 2009;Chaloupka, Malam, Seifalian, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies have shown that an especially lucrative opportunity lies in applying these polymeric nanostructures in the medical field (Abdelgawada, Hudsona, Rojas, 2014;Chaloupka, Malam, Seifalian, 2010;Dallas, Sharma, Zboril, 2011). The literature contains a great deal of studies demonstrating the successful application of these nanostructures in the healthcare, pharmaceutical and cosmetic industries for repairing and regenerating the skin and organs; as drug delivery vectors and therapies; biocompatible and biodegradable implants; in medical diagnosis and instrumentation; as tissue protective agents that guard against infection; and in cosmetics, molecular medicines, supplements and body care applications in the field of dentistry (Nista, Bettini;Mei, 2015;Bizarria, Davila, Mei, 2014;Kleinubing et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Silver nanoparticles incorporated into nanostructured biopolymer membranes produced by electrospinning: a study of antimicrobial activity

Segala

Nista

Cordi

et al. 2015

Braz. J. Pharm. Sci.

View full text Add to dashboard Cite

This study examines the antimicrobial activity of silver nanoparticles incorporated into nanostructured membranes made of cellulose acetate (CA) and blends of chitosan/poly-(ethylene oxide, CTS/PEO) and prepared by electrospinning. The formation of chemically synthesized Ag nanoparticles (AgNPs) was monitored by UV-visible spectroscopy (UV-Vis) and characterized by transmission electron microscopy (TEM). The size distribution of the AgNPs was measured by dynamic light scattering (DLS), with an average size of approximately 20 nm. The presence of AgNPs on the surface of electrospun nanofibers was observed by field emission electron microscopy (FEG) and confirmed by TEM. The antimicrobial activity of AgNPs incorporated into nanostructured membranes made of CA and CTS/PEO electrospun nanofibers was evaluated in the presence of both Gram-positive bacteria, such as Staphylococcus aureus ATCC 29213 and Propionibacterium acnes ATCC 6919, and Gram-negative bacteria, such as Escherichia coli ATCC 25992 and Pseudomonas aeruginosa ATCC 17933. Microbiological results showed that the presence of AgNPs in CA and CTS/PEO nanostructured membranes has significant antimicrobial activity for the Gram-positive bacteria Escherichia coli and Propionibacterium acnes. Uniterms:Electrospinning. Silver nanoparticles/antibacterial activity. Cellulose acetate. Chitosan.Neste trabalho avaliou-se a atividade antimicrobiana das nanopartículas de prata (AgNPs) incorporadas em membranas de acetato celulose (AC) e blendas de quitosana/poli-óxido de etileno (CTS/PEO) preparadas pelo método de eletrofiação. A formação das AgNPs previamente sintetizadas foi monitorada por UV-Vis e caracterizada por microscopia eletrônica de transmissão (MET). A distribuição de tamanho das AgNPs foi mensurada por espalhamento de luz dinâmico, com tamanho médio em torno de 20 nm. A presença das NPs na superfície das nanofibras eletrofiadas foi observada por microscopia eletrônica com emissão de campo (FEG) e confirmada por MET. A atividade antimicrobiana das membranas nanoestruturadas de AC e CTS/PEO foi avaliada pelo uso de bactérias Gram-positivas, tais como Staphylococcus aureus ATCC 29213 e Propionibacterium acnes ATCC 6919, e Gram-negativas, como Escherichia coli ATCC 25992 e Pseudomonas aeruginosa ATCC 17933. Os resultados microbiológicos mostraram a presença das AgNPs nas membranas de AC e CTS/PEO com significativa atividade antimicrobiana para Escherichia coli e Propionibacterium acnes, respectivamente.Unitermos: Eletrofiação. Nanopartículas de prata/atividade antimicrobiana. Acetato de celulose. Quitosana. 912 INTRODUCTIONThe use of metal nanoparticles in various medical and biotechnological applications is one of the most investigated areas in materials science. These applications require appropriate chemical functionalization of the nanoparticles with organic molecules or their incorporation into polymer matrices (Dallas, Sharma, Zboril, 2011). Among the numerous types of nanoparticles that have been used to decorate polymers, silver nanoparticles (AgNPs) ...

show abstract

Silver polymeric nanocomposites as advanced antimicrobial agents: Classification, synthetic paths, applications, and perspectives

Cited by 568 publications

References 194 publications

Antibacterial activity of silver nanoparticles: A surface science insight

Antibacterial activity of silver nanoparticles: A surface science insight

Thermal, Mechanical and Antibacterial Properties of Ldpe/Starch Bio-Based Polymer Blends for Food Packing Applications

Silver nanoparticles incorporated into nanostructured biopolymer membranes produced by electrospinning: a study of antimicrobial activity

Contact Info

Product

Resources

About