Impregnation Of Silver Nanoparticles Research Articles

Fabrication of anti-biofouling and antibacterial polysulfone membrane via impregnation of silver nanoparticles

Biofouling is amongst the paramount complications in membrane filtration systems, which are used to purify wastewater. It increases the price tag on processes, whereas decreases the membrane permeability and period efficiency. Utilizing the strong attributes of silver nanoparticles (AgNPs) as antibacterial agents, mycological originated AgNPs were evaluated in the study. Development of polysulfone membrane (Psf) infused with AgNPs for wastewater treatment, having antibacterial along with antifouling properties were included in the study. Several water-drainage microbial insulates, e.g, Enterobacter aerogenes, Escherichia coli, Klebsiella pneumonia, Salmonella choleraesuis, Shigella sonnei, Pseudomonas aeruginosa, and Staphylococcus aureus appeared to be restrained against AgNPs of concentration 50-500 ppm. The AgNPs impregnated Psf ultrafiltration membranes reduced the bacterial count (cfu/cm2) at the 7th, 21st, 30th and 45th day of experimentation in contrast to standard Psf membrane. The efficacy of this anti-biofouling was confirmed by employing FTIR and scanning electron microscopy (SEM) characterization techniques. Within FTIR, in addition to characteristic highs of Psf layer, a new top at 687 cm-1 showing a -CH=CH- pattern in the cis transfiguration was also present, proving the particular degradation of membrane on account of biofouling. The SEM images confirmed that AgNPs tried their best to hinder biofouling, hence, AgNPs proved to be a beneficial solution for restraining the biofilm expansion and increasing membrane life. Keywords: Anti-biofouling, Polysulfone membrane, silver nanoparticles, Wastewater treatment

Citrate-mediated impregnation of silver nanoparticles for durable antibacterial cellulosic fabric

PurposeThe purpose of this study is to apply silver nanoparticles on the cellulosic fabric via a green cross-linking approach to obtain antibacterial textiles. The cellulosic fabrics may provide an ideal enclave for microbial growth due to their biodegradable nature and retention of certain nutrients and moisture usually required for microbial colonization. The application of antibacterial finish on the textile surfaces is usually done via synthetic cross-linkers, which, however, may cause toxic effects and halt the biodegradation process.Design/methodology/approachHerein, we incorporated citrate moieties on the cellulosic fabric as eco-friendly crosslinkers for the durable and effective application of nanosilver finish. The nanosilver finish was then applied on the citrate-treated cellulosic fabric under the pad-dry-cure method and characterized the specimens for physicochemical, textile and antibacterial properties.FindingsThe results expressed that the as-prepared silver particles possessed spherical morphology with their average size in the nano range and zeta potential being −40 ± 5 mV. The results of advanced analytical characterization demonstrated the successful application of nanosilver on the cellulosic surface with appropriate dispersibility.Practical implicationsThe nanosilver-treated fabric exhibited appropriate textile and comfort and durable broad-spectrum antibacterial activity.Originality/valueThe treated cellulosic fabric expressed that the cross-linking, crystalline behavior, surface chemistry, roughness and amphiphilicity could affect some of its comfort and textile properties yet be in the acceptable range for potential applications in medical textiles and environmental sectors.

Eco-friendly Synthesis of Silver Nanoparticles for Multifunctional Protective Cotton and Flax Fabrics

ABSTRACT The antibacterial properties of nano-silver are well-known methods to combat microbes in many respects, and the coating process emphasized this phenomenon more to textile materials. With the advancement in promoting eco-friendly methods to synthesize silver, sweet Orange Peel extract was used to reduce Ag+ to Ag0. UV, XRD, SEM, EDX, and DLS were used to characterize and diagnose the formation of silver nanoparticles. The nanocrystallite size was measured using the Scherrer equation and the SEM images showed well-dispersed nanoparticles at pH levels 9 and 10. The treated cotton and flax fabrics were characterized by UV-vis, FTIR, SEM, and EDX to find the proper level of impregnation of silver nanoparticles onto the fabrics. The colorimetric results showed good distribution of coloronto both fabrics. They exhibited an increase in UV protection factor (UPF value raised from 5.47% to 12.95% for cotton and 3.36% to 4.11% for flax). The antibacterial efficacy was tested against Escherichia coli and the treated fabrics showed satisfactory resistance even after 10 consecutive washing cycles. The zone of inhibition was reported 15 mm and 14 mm (after 10 cycles) for cotton fabric and 14 mm and 10 mm (after 10 cycles) for flax fabric, respectively.

Impregnation of Silver Nanoparticles onto Polymers Based on Sugarcane Bagasse for the Remediation of Endocrine Disruptor–Bisphenol A from Water

This present study introduces a contemporary innovation of synthesized polymer–silver nanoparticle nanocomposite adsorbent based on sugarcane bagasse (AgNP-SB- βCD) for the sequestration of emerging micropollutant–bisphenol A from water matrix. Batch adsorption mode was carried out to assess the effectiveness of AgNP-SB- βCD nanocomposites towards eliminating bisphenol A (BPA). Characterization techniques including SEM, FTIR, and XRD have confirmed the successful incorporation of silver nanoparticles (AgNPs) onto bagasse–polymer. At 25°C, pH 7, and contact time of 120 min, the nanocomposites had a maximum uptake capacity of 158.4 mg g-1on BPA. The equilibrium isotherm of BPA on AgNPs-SB- βCD has fitted effectively with Langmuir model while the adsorption kinetics conformed to pseudo-second order. The adsorption phenomenon was controlled mainly by physisorption (via host–guest inclusion van der Waals bonding and pore filling effect). In addition, oxidative degradation of BPA by AgNPs-SB- βCD could marginally contribute the removal of BPA due to oxidative dissolution of AgNPs at pH 7. The thermodynamic results substantiate the spontaneity and exothermic behaviors of the adsorption phenomenon. The polymeric nanocomposite adsorbent was regenerated five times (using 75% ethanol) without considerable loss of its adsorption capacity. This authenticates its reusability and consistency performances; accordingly, it can be a market competitor adsorbent for the treatment of water contaminated with BPA.

Engineered polyethersulfone membrane for well-dispersed silver nanoparticle impregnation at high loading: high water permeate flux and biofouling prevention.

We present a new method for impregnation of silver nanoparticles (Ag NPs) at high loading on polyethersulfone (PES) membrane's external surface, simultaneously retaining native membrane's porosity - to achieve a high water permeate flux without biofouling. This was possible by PES membrane's surface modification with acrylic acid (AA), finally leading to AA-Ag-PES membrane. AA-Ag-PES had a high (9.04%) Ag-NP loading selectively on membrane surface, as discrete, smaller (mean size: 20 nm) nanoparticles (NPs). In nonfunctionalized Ag-PES, aggregated (mean size: 70 nm) NPs, with lower Ag loading (0.73 wt.%) was obtained, with NP being present both on membrane surface and inside pores. Consequently, AA-Ag-PES could maintain similar water permeability and porosity (10,153.05 Lm-2 h-1bar-1 and 69.98%, respectively), as in native PES (11,368.74 Lm-2 h-1bar-1 and 68.86%, respectively); whereas both parameters dropped significantly for Ag-PES (4,869.66 Lm-2 h-1bar-1 and 49.02%, respectively). AA-Ag-PES also showed least flux reduction (7.7%) due to its anti-biofouling property and high flux recovery after usage and cleaning, compared to native PES and Ag-PES membrane's much higher flux reduction (54.29% and 36.7%, respectively). Hence, discrete NP impregnation, avoiding pore blockage, is key for achieving high water flux and anti-biofouling properties (in AA-Ag-PES), compared to non-functionalized Ag-PES, due to aggregated Ag-NPs inside its pores.

Antimicrobial activity of bleached cattail fibers (Typha domingensis) impregnated with silver nanoparticles and benzalkonium chloride

AbstractTypha domingensis (Cattail) fiber is a significant natural resource, abundant in cellulose. The study reports the useful utilization of T. domingensis fiber for physicochemical impregnation of silver nanoparticles and benzalkonium chloride, in the development of a material with antimicrobial activity. The fibers were pre‐treated with alkaline hydrogen peroxide (bleaching) for partial removal of lignin, pectin and waxes. Subsequently treated in a solution of different concentrations of benzalkonium chloride and Tollens' reagent. The new materials obtained were carefully investigated for their structure and thermal stability, morphology and susceptibility to antimicrobials (Staphylococcus aureus, Escherichia coli, Salmonella typhimuruim, and Salmonella enteritidis). Fourier transform infrared spectra showed the presence of benzalkonium chloride. The morphology analysis showed the silver nanoparticles on the surface of the bleached fibers. The susceptibility profile to antimicrobials was confirmed by the formation of inhibition halos (≅11.26 mm). Based on the properties of the materials obtained, it can be concluded that the modified cattail fibers have the potential to be used as a functional filler, or coating, in the development of antimicrobial composites.

Preparation of nanocomposite silver/kaolin with antibacterial properties

In this study, a nanocomposite based on kaolin from the Alekseevsky deposit (Kazakhstan), containing nano-silver particles, was synthesized. Kaolin has good physical and chemical properties and is an effective carrier for medicines. The synthesis of AgNPs/kaolin nanocomposites was carried out by chemical reduction. Impregnation of silver nanoparticles into silica matrix can prevent the agglomeration of mobile ions, and thereby preserve the antibacterial activity of the compound. The composition and structure of the resulting nanocomposite were studied using SEM/EDS analysis to study the morphology and elemental composition of natural and silver-modified kaolin, the specific surface was determined by the BET method, and functional groups were identified by IR spectroscopy. The resulting composite was tested for antibacterial activity against Gram-negative and Gram-positive bacteria (E.Сoli, S. Aureus).

Biogenic and chemically synthesized Solanum tuberosum peel\u2013silver nanoparticle hybrid for the ultrasonic aided adsorption of bromophenol blue dye

This work was aimed at the synthesis of a hybrid (STpe-AgNP), obtained by impregnation of silver nanoparticles (AgNP) onto Solanum tuberosum peel (STpe), for the ultrasonic assisted adsorption of bromophenol blue (BB) dye. SEM, FTIR, XRD, EDX, TGA and BET techniques were used to characterize the adsorbents. The XRD, SEM and EDX confirmed successful impregnation of AgNPs onto STpe to form the hybrid. The AgNPs impregnated onto the hybrid were found to be water stable at various pH values of 2.0–9.0. Chi-square (χ2 < 0.024) and linear regression (R2 > 0.996) showed that the Freundlich model was best fitted among the isotherm models, corroborated by the oriented site model. Kinetic analysis conformed to the intraparticle diffusion and pseudo-first-order rate equations, while thermodynamics displayed a physical, spontaneous and endothermic adsorption process. The presence of competing Pb(II), Ni(II), Cd(II) and Zn(II) metal ions in solution interfered with the adsorption of BB onto the biosorbents. In terms of reusability, STpe and STpe-AgNP showed BB desorption of 91.3% and 88.5% respectively, using NaOH as eluent. Ultra-sonication significantly enhanced the adsorption of BB by both adsorbents, but the impregnation of AgNPs only slightly improved adsorption of the dye from the simulated wastewater. This study also illustrated that pristine STpe biomass waste is a cheap viable option for the decontamination of BB from water.

Bacterial cellulose matrix with in situ impregnation of silver nanoparticles via catecholic redox chemistry for third degree burn wound healing

In the present study, bacterial cellulose (BC) based nanocomposite dressing material was developed for third burn wound management by polydopamine (PD) coated BC with in situ reduction of silver nanoparticles (BC-PDAg). BC-PDAg nanocomposite was characterized to understand the morphological, physical and chemical properties. Antimicrobial activity of BC-PDAg against burn wound specific pathogens were significant. The in vitro cytotoxicity and proliferation studies revealed that BC-PDAg nanocomposite is biocompatible and it supports cell proliferation. Further, in vivo experiments on female albino Wistar rats confirmed that BC-PDAg was effective in wound healing by promoting re-epithelization, and collagen deposition as evidenced by histopathological analysis. Moreover, molecular gene expression study has revealed that BC-PDAg promotes healing process by regulating the expression of inflammatory, angiogenesis and growth factor genes. The overall performance of BC-PDAg nanocomposite suggests that it could be used as promising skin regenerative tool in modern medicine.

Bio-approach synthesis of nanosilver impregnation on calcium hydroxyapatite by biological activated ammonia from urinary waste

A novel biological approach is attempted to convert the human urinary waste into a well-designed bionanomaterial. In the present study, biological activated ammonia gas (NH3(g)) mediated synthesis of hydroxyapatite material (B-HAp) and then impregnation of silver nanoparticles (AgNPs) on the B-HAp material surface was performed by photoreduction method and was followed by an evaluation of its antibacterial activity and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. X-ray diffractionspectroscopy (XRD) and Field emission-scanning electron microscopy (FE-SEM) were engaged to analyze the synthesized materials. Analytical studies revealed the morphology of the crystalline B-HAp synthesized by biologically activated NH3(g) as spherical shaped with AgNPs impregnated on over it. Atomic Absorption Spectrometers (AAS) estimated 2–7 ppm of Ag+ ion were released from the 100 ppm of Ag concentration was impregnated with B-HAp material (B-HAp-Ag-10). It was also found to be an excellent performance of antibacterial activity against Pseudomonas sp, E.coli and S. aureus. The cell- material interaction study of the thus synthesised B-HAp-Ag-10 was found to exhibit a minimal cytotoxicity level when incorporated in MG63 osteosarcoma cell lines, thus confirming the prospective biological application of our material in the biomedical field.

Preparation of gum acacia-poly(acrylamide-IPN-acrylic acid) based nanocomposite hydrogels via polymerization methods for antimicrobial applications

An interpenetrating polymer network (IPN) nanocomposite hydrogel based on gum acacia, acrylamide and acrylic acid Ga-cl-poly (AAm-IPN-AA) was synthesized by a two-step aqueous polymerization followed by a one-step impregnation of silver nanoparticles. The first step comprises the preparation of a semi-interpenetrating polymer network [Ga-cl-poly (AAm)] based on AAm and Ga via free radical polymerization. The reaction was initiated by ammonium persulphate under microwave irradiation and N, N′-methylene-bis-acrylamide was used as a crosslinker during the polymerization. The maximum percentage of swelling (1256%) was exhibited by the semi-IPN. In the second step, the synthesis of IPN was carried out by the crosslinking of polyacrylic acid onto semi-IPN hydrogel. The synthesized crosslinked hydrogels were studied by FTIR, SEM and XRD techniques. Silver nanoparticles (AgNPs) (20–80 nm) were synthesized through the reduction of silver nitrate by flower extract of Koelreuteria apiculate. The synthesized hydrogels were employed as a template for the impregnation of AgNPs. The resultant nanocomposite hydrogels were characterized by XRD, FTIR, and SEM. The prepared samples were subjected to antibacterial and antifungal studies with different bacterial (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa) and fungal strains (Aspergillus and Penicillium). Synthesized nanocomposite hydrogels have shown improved antibacterial and antifungal activities.

Simultaneous green synthesis and in-situ impregnation of silver nanoparticles into organic nanofibers by Lythrum salicaria extract: Morphological, thermal, antimicrobial and release properties.

This research has revealed the promising, green and one-pot approach for fabrication of antimicrobial nanohybrids based on organic nanofibers including cellulose (CNF), chitosan (CHNF), and lignocellulose (LCNF) nanofibers impregnated with silver nanoparticles (AgNPs). Lythrum salicaria extract was used as a reducing agent as well as a capping agent. Formation of the spherical AgNPs ranging between 45 and 65 nm was proved by UV-Vis spectroscopy, transmission electron microscopy (TEM), and dynamic light scattering (DLS). Biomaterials supported AgNPs were characterized and compared for their morphological, thermal, release, and antimicrobial properties. The considerable influence of the phenolic compounds of L.salicaria extract on the synthesis and uniform distribution of AgNPs on nanofibers was confirmed by field emission electron microscopy (FE-SEM). Energy dispersive X-ray spectroscopy (EDX) and ICP-OES analysis of nanohybrids, reflected a high loading capacity for LCNF and also CHNF in contrast to CNF. The release of AgNPs from LCNF substrate was lower than other nanofibers but the order of antimicrobial activity of nanohybrids against E.coli and S.aureus was as this: CHNF ˃ LCNF ˃ CNF. Generally, this research suggested that the efficiency of CHNF and LCNF as immobilizing support of AgNPs is higher than CNF and L.salicaria extract was proposed as a high potential reducing and capping agent.

INFLUENCE OF VAPORIZATION AND IMPREGNATION OF SILVER NANOPARTICLES ON THE DRYING RATE OF Eucalyptus pellita F. MUELL.

The aim of this study was to evaluate the effect of vaporization and impregnation of silver nanoparticles on the Eucalyptus pellita wood properties. For that, samples of three radial regions of the wood from three trees were vaporized for 12 and 24 hours and later on, they were immersed in solution of silver nanoparticles with and without application of vacuum (750 mm.Hg). Anatomical, physical and chemical analyzes of the wood were carried out in order to evaluate the effect of the treatments. The drying rate of the wood was determined in moisture bands before and after the fiber saturation point. Generally, the treatments did not modify the anatomical characteristics, permeability, and wood density in the three radial regions; however, the vaporization for 24h reduced the total extractive content in the wood. These results contributed in obtaining gains in the drying rate before and after the fiber saturation point. The effect of impregnation of nanoparticles with vacuum preceded by two periods of vaporization resulted in higher drying rates and the time of 24h stood out, resulting in the best averages among all treatments. The impregnation of nanoparticles had positive effects on the drying rate.

Chitosan Mediated Formation and Impregnation of Silver Nanoparticles on Viscose Fabric in Single Bath for Antibacterial Performance

Cellulosic materials being biodegradable are susceptible to bacterial attack. Present study was meant to develop an antibacterial viscose fabric via a clean, easy and reproducible approach. Silver nanoparticles (SNPs) were prepared using chitosan both as reducing and as well as stabilizing agent to promote green synthesis of SNPs. The prepared SNPs were characterized using dynamic light scattering and UV-visible (vis) absorption spectroscopy. The average size of SNPs was found to be 8.574 nm with respective zeta potential of +45.2 mV using AgNO3 concentration of 1 mM and chitosan as 1 % (w/v). Pre-treated viscose fabric was undergone an in situ treatment to impregnate SNPs on its surface under certain autoclave conditions. Scanning electron microscopy revealed the presence of SNPs on surface of treated viscose fabric in comparison with the untreated fabric. In addition, Fourier transform infrared and elemental analysis confirmed the presence of silver on the treated fabric. The textile properties of the viscose fabric samples like; tensile strength, wettability, antibacterial activity and whiteness were evaluated using the standard protocols. The developed treated viscose fabric showed good antibacterial properties against both Gram negative Escherichia coli and Gram-positive Staphylococcus aureus bacterial strains with fair textile characteristics. This is the first report on in situ fabrication and impregnation of SNPs using chitosan as both reducing and stabilizing agent on a regenerated cellulose fabric like viscose.

Paper-microfluidics based SERS substrate for PPB level detection of catechol

The application of microfluidics for largescale rapid analytics holds great promise in the pharmaceutical diagnostics and analytical chemistry. Here we report a paper based microfluidic substrate designed by the impregnation of Silver nanoparticles. This study demonstrates the achievement of a thousand-fold increase in the successful detection level up to 10 ppb (90.8 nM) by employing Surface Enhanced Raman Spectroscopy (SERS) for the detection of Catechol. The presented sensor exhibits the following main features: (i) high specificity of enzyme (Hemocyanin)-based sensing, (ii) effective SERS sensitivity, (iii) easiness and cost-effectiveness of a paper-based platform. We rationalize these findings using the ab initio DFT simulations using Gaussian 09 whose theoretical calculations reflect the observed experimental Raman peaks.

Bactericidal coating of paper towels via sustainable biosynthesis of silver nanoparticles using Ocimum sanctum leaf extract

The present study reports the effective impregnation of silver nanoparticles (AgNPs) biosynthesized using Ocimum sanctum leaf extract onto conventional tissue paper for the inhibition of hospital borne pathogenic bacterial growth. The AgNPs biosynthesised using the leaf extract had face centered cubic lattice structure, nano scale dimensions, biocompatible coating of plant proteins and an absorbance maximum at 438 nm. Further, these nanoparticles were used to engineer tissue paper towels under conditions akin to room temperature. The presence of nanoparticles on the tissue paper filaments were confirmed using SEM analysis. Detailed analysis using XRD and FTIR indicated the presence of AgNPs on the paper fibres and the appreciable amounts of bio-active functional groups on the modified tissue paper when compared to the conventional ones. The bioactive layers aid the firm adherence of bacterial cell wall proteins and there after the silver particles extend their bactericidal action on the attached bacteria. The antibacterial activity of the nano-engineered tissue paper towels were tested against common gram positive and gram negative pathogens. Further, cytotoxicity evaluation using MTT assay revealed that the AgNPs coated paper towels does not pose any unintended adverse effects on fibroblast cell lines. These results highlight that biogenic AgNPs coated paper towels are cost effective, eco-friendly and wholesome alternative for the conventional paper towels and can be an effective sanitizing product for decreasing the risk of health associated infections.

Fabrication of silver nanoparticles-embedded antibacterial polymer surface through thermal annealing and soft molding technique

The major challenge faced in biomedical field is the formation of biofilm on polymer devices like catheters. It is important to functionalize the biomedical devices with a bactericidal agent through an easy and safe process in order to protect them from bacterial attack. In this article, the new method of impregnation of silver nanoparticles (AgNPs) into polymer film was proposed and tested against bacterial cells. The different sizes of silver nanoparticles were embedded in polystyrene film using thermal annealing and soft molding technique. Silver films having different thickness were deposited on the highly polished machinable glass ceramic (MACOR) substrate using direct current (DC) sputtering and subjected to at 750 °C for 15 min. After the heat treatment, AgNPs were formed on MACOR sample. It was then characterized using field emission scanning electron microscope (FE-SEM). Image-J software was used to analysed shape, size and distribution of AgNPs. The spin coating method was adopted to coat polystyrene film on to MACOR substrate supported AgNPs and allow it to cure for 24 h. After curing, the polystyrene film was peeled off and finally, AgNPs got transferred to polystyrene film. The AgNPs embedded polystyrene film was analyzed using FE-SEM and atomic force microscopy (AFM). Spread plate (plate counting) method was used to evaluate the bacterial killing potential of modified polystyrene film against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) bacteria. The modified polystyrene film shows effective antibacterial ability against both the types of bacteria compared to the plain polystyrene surface.

Doprinos impregnisanih nanočestica srebra porastu idealnosti filtrirajućih sredstava respiratorne zaštite

A technical contradiction arises when within a system one parameter improves thus automatically causing another one to worsen. In a situation like this, instead of a usual acceptance of compromise which leads to optimization of a solution for a newly founded problem, in inventology we implement the process of idealisation. The experimental part of this study comprises comparative examination of NaCl aerosol leakage, as a simulator of biological agents, into the epidemiological anti-microbe masks EM1 and EM2, with the aim of determining physiological suitability of EM1 and EM2 and the resistance that arises when inhaling NaCl aerosol was measured at the flows of 95dm3/min. It was experimentally proved that impregnation of silver nanoparticles onto the inner filtrating layer of EM2 contributes to the increase of its efficiency, and mathematical modelling helped calculate the realistic increase of this means.

Microwave Mediated Impregnation of Silver Nanoparticles on Silk Fabric for Hygienic Clothing

Textile materials and clothing are known to be susceptible to microbial attack as these provide large surface area and absorb moisture required for microbial growth Natural fibers have protein keratin and cellulose etc which provide basic requirements such as moisture oxygen nutrients and temperature for bacterial growth and multiplication This often leads to objectionable odour dermal infection product deterioration allergic responses and other related diseases This necessitates the development of clothing that could provide a desired antimicrobial effect Nanotechnology is an emerging highly interdisciplinary field based on the ability to manipulate structural materials on the level of individual atom and molecules Nanostructures are capable of enhancing physical properties of conventional textiles in areas such as antimicrobial properties water repellence soil resistance antistatic anti infrared and flame retardant properties dye ability colour fastness and strength of textile materials Studies have been carried out in the present work to fine tune the silver nanoparticles for special applications Silver nanoparticles were biosynthesized in laboratory using Bacillus strain Silk fabric was impregnated with silver nanoparticles using microwave irradiation method Microwave irradiation is emerging as a rapid and green method of heating for nanoparticle synthesis and impregnation The antibacterial activity of the impregnated fabrics was determined against different gram ve and ve bacterial strains The results indicated that microwave impregnated silk fabric with silver nanoparticles had very good antibacterial activity inhibition Bactericidal properties of the functionalized fabric do not change after washing Production of such materials is extremely fast convenient and cost effective

Silver and Titanium Nanoparticles Used as Coating on Polyurethane Catheters

Silver nanoparticles have been used in the medical area due to their remarkable antimicrobial properties. In this sense titanium dioxide nanoparticles obtained by the sol-gel method were used as coating of catheters for subsequent impregnation of silver nanoparticles with gamma irradiation and electron beam at 25 and 50 kGy. This work aimed to study the use of the silver nanoparticles and titanium dioxide as coating of polyurethane Central Venous Catheter (CVC) for antimicrobial activity. Furthermore the amounts of titanium and silver present in the coated catheters had been evaluated by Inductively Coupled Plasma – Optical Emission Spectrometry (ICP OES). Therefore the Raman spectrometry was used to identify the polymorph of titanium oxide, rutile.