Synthesis and characterization of ZnO – polymer nanocomposites

Matei, Alina; Cernica, I.; Cadar, Oana; Roman, Cecilia; Schiopu, V.

doi:10.1007/s12289-008-0288-5

Cited by 124 publications

(58 citation statements)

References 8 publications

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“…Due also to low cost, ZnO particles (with sub-micro and nano-dimensions) are therefore ideal fillers for polymers to be applied in the field of active food packaging. Thus, ZnO particles have been incorporated into a number of different polymers used in food packaging [15,16], such as low-density polyethylene (LDPE) [17,18], isotactic polypropylene (iPP) [19][20][21][22][23][24], polyamide (PA) [18,25], and polylactic acid (PLA) [26].…”

Section: Introductionmentioning

confidence: 99%

Development of Antibacterial Composite Films Based on Isotactic Polypropylene and Coated ZnO Particles for Active Food Packaging

et al. 2016

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This study was aimed at developing new films based on isotactic polypropylene (iPP) for food packaging applications using zinc oxide (ZnO) with submicron dimension particles obtained by spray pyrolysis. To improve compatibility with iPP, the ZnO particles were coated with stearic acid (ZnOc). Composites based on iPP with 2 wt % and 5 wt % of ZnOc were prepared in a twin-screw extruder and then filmed by a calender. The effect of ZnOc on the properties of iPP were assessed and compared with those obtained in previous study on iPP/ZnO and iPP/iPPgMA/ZnO. For all composites, a homogeneous distribution and dispersion of ZnOc was obtained indicating that the coating with stearic acid of the ZnO particles reduces the surface polarity mismatch between iPP and ZnO. The iPP/ZnOc composite films have relevant antibacterial properties with respect to E. coli, higher thermal stability and improved mechanical and impact properties than the pure polymer and the composites iPP/ZnO and iPP/iPP-g-MA/ZnO. This study demonstrated that iPP/ZnOc films are suitable materials for potential application in the active packaging field.

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Section: Introductionmentioning

confidence: 99%

Development of Antibacterial Composite Films Based on Isotactic Polypropylene and Coated ZnO Particles for Active Food Packaging

et al. 2016

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“…[21] Among metal oxide NPs, ZnO NPs have many significant features such as chemical and physical stability, high catalytic activity, effective antibacterial activity as well as intensive ultraviolet (UV) and infrared (IR) adsorption. [22,23] In addition to this, ZnO NPs are most efficient photocatalysts used in the photodegradation of environmental organic pollutants and toxic. [24,25] The most common technique used to produce defects in pure ZnO NPs is based on the choice of synthesis methods, [26,27] use of composite photocatalysts [28,29] and the doping of pure ZnO with suitable metal ion impurities.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterisation and antimicrobial activity of manganese- and iron-doped zinc oxide nanoparticles

Sharma

Jandaik

Kumar

et al. 2015

Journal of Experimental Nanoscience

106

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The present work reports study on antimicrobial activity of pure and doped ZnO nanocomposites. Polyvinyl pyrrolidone capped Mn-and Fe-doped ZnO nanocomposites were synthesised using simple chemical co-precipitation technique. The synthesised materials were characterised using transmission electron microscope (TEM), X-ray powder diffraction (XRD), energy dispersive X-ray fluorescence (EDXRF), Fourier transform infrared (FTIR) spectroscopy and ultraviolet (UV) visible spectroscopy. The XRD and TEM studies reveal that the synthesised ZnO nanocrystals have a hexagonal wurtzite structure with average crystalline size »7À14 nm. EDXRF and FTIR study confirmed the doping and the incorporation of impurity in ZnO nanostructure. The antimicrobial activities of nanoparticles (NPs) were studied against fungi, grampositive and gram-negative bacteria using the standard disc diffusion method. The photocatalytic activities of prepared NPs were evaluated by degradation of methylene blue dye in aqueous solution under UV light irradiation. Experimental results demonstrated that ZnO NPs doped with 10% of Mn and Fe ions showed maximum antimicrobial and photodegradation efficiency in contrast with that of the 1% loading. The enhancement in antimicrobial effect and photocatalytic degradation is attributed to the generation of reactive oxygen species due to the synergistic effects of Mn and Fe loading.

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“…1 Metal nanoparticles, such as those containing gold and silver have recognized importance in chemistry, physics, and biology because of their unique optical, electrical, and photothermal properties. 2 The ease of synthesizing gold and silver nanoparticles and their affinity for binding many biological molecules makes them attractive candidates for study.…”

Section: Introductionmentioning

confidence: 99%

Gold and silver nanoparticles from Trianthema decandra: synthesis, characterization, and antimicrobial properties

Geethalakshmi

Sarada²

2012

IJN

186

108

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Background:There is an increasing commercial demand for nanoparticles due to their wide applicability in various markets, including medicine, catalysis, electronics, chemistry, and energy. In this report, a simple and ecofriendly chemical reaction for the synthesis of gold and silver nanoparticles from Trianthema decandra (Aizoaceae) has been developed. Methods and results: On treatment of aqueous solutions containing chloroauric acid or silver nitrate with root extract of T. decandra, stable gold or silver nanoparticles were rapidly formed. The kinetics of reduction of gold and silver ions during the reaction was analyzed by ultraviolet-visible spectroscopy. Field emission-scanning electron microscopy showed formation of gold nanoparticles in various shapes, including spherical, cubical, triangular, and hexagonal, while silver nanoparticles were spherical. The size of the gold nanoparticles was 33-65 nm and that of the silver nanoparticles was 36-74 nm. Energy dispersive x-ray and Fourier transform infrared spectroscopy confirmed the presence of metallic gold and metallic silver in the respective nanoparticles. The antimicrobial properties of the synthesized nanoparticles were analyzed using the Kirby-Bauer method. The results show varied susceptibility of microorganisms to the gold and silver nanoparticles. Conclusion: It is believed that phytochemicals present in T. decandra extract reduce the silver and gold ions into metallic nanoparticles. This strategy reduces the cost of production and the environmental impact. The silver and gold nanoparticles formed showed strong activity against all microorganisms tested.

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Synthesis and characterization of ZnO – polymer nanocomposites

Cited by 124 publications

References 8 publications

Development of Antibacterial Composite Films Based on Isotactic Polypropylene and Coated ZnO Particles for Active Food Packaging

Development of Antibacterial Composite Films Based on Isotactic Polypropylene and Coated ZnO Particles for Active Food Packaging

Synthesis, characterisation and antimicrobial activity of manganese- and iron-doped zinc oxide nanoparticles

Gold and silver nanoparticles from Trianthema decandra: synthesis, characterization, and antimicrobial properties

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