Nanocomposite polyacrylonitrile filaments with electrostatic dissipative and antibacterial properties

2016 ◽  
Vol 50 (30) ◽  
pp. 4279-4289 ◽  
Author(s):  
Nuray Kizildag ◽  
Nuray Ucar
Keyword(s):  
Antibacterial Activity ◽  
Silver Nitrate ◽  
Chemical Reduction ◽  
Antibacterial Properties ◽  
Reduction Process ◽  
Nitrate Content ◽  
Visible Spectroscopy ◽  
Ion Release ◽  
Filament Structure ◽  
Silver Release

In this study, silver nitrate was added to polyacrylonitrile filament structure and chemical reduction was applied to composite filaments in order to develop multifunctional polyacrylonitrile filaments with electrostatic dissipative and antibacterial properties. Composite filaments of polyacrylonitrile and silver nitrate were characterized and evaluated in terms of morphology, chemical structure, tensile properties, crystallinity, conductivity, thermal properties, silver ion release behaviour and antibacterial activity. Additionally, ultraviolet-visible spectroscopy was used to confirm the formation of nanoparticles and the variation in the concentration of the nanoparticles with the application of the chemical reduction process. Scanning electron microscope images and ultraviolet-visible spectroscopy results confirmed the formation of nanoparticles in the filament structure. Breaking strength and breaking elongation increased at silver nitrate content of 1%. Composite filaments displayed improved thermal stability and their conductivities were in the semiconductive range. Atomic absorption spectroscopy confirmed that necessary amounts of silver release for antibacterial activity occurred, while the antibacterial activity analysis showed that the composite filaments have excellent antibacterial activity. The results obtained were promising and showed that the composite filaments could be used in electrostatic dissipative and antibacterial applications.

scholarly journals NOVEL COMPOSITE OF SILVER-BACTERIAL CELLULOSE (Ag-BC) FROM SIWALAN SAP (Borassus flabellifer) AND ITS ANTIBACTERIAL ACTIVITY

2020 ◽  
Vol 83 (1) ◽  
pp. 19-25
Author(s):  
Suntini Suntini ◽  
Anastasia Wheni Indrianingsih ◽  
Harjono Harjono
Keyword(s):  
Antibacterial Activity ◽  
Bacterial Cellulose ◽  
Antibacterial Properties ◽  
Reduction Process ◽  
Diffusion Method ◽  
Natural Material ◽  
Gram Positive Bacteria ◽  
Antibacterial Assay ◽  
Natural Composite

Recently, a wound healing from natural composite with excellent properties is in a high demand. In this study, a novel composite of bacterial cellulose made from Siwalan sap (Borassus flabellifer) was achieved. Siwalan is a common plant in Java Island of Indonesia and the application is very limited for beverage only. This study aims to determine the effect of the AgNO3/NaBH4 concentration ratio in the development of Ag-BC composites and its antibacterial properties from Siwalan sap. Ag-BC composites were prepared by impregnating the silver solution into the BC matrix through the reduction process with NaBH4. Characterization of Ag-BC composites conducted using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray (EDX). Antibacterial assay was performed using disc diffusion method against Salmonella typhimurium (Gram-negative) and Staphylococcus aureus (Gram-positive) bacteria. The characterization of Ag-BC composite shows the nanostructure of BC with a length of fiber around 35-60 nm in width. The SEM-EDX micrograph showed that silver particles were impregnated into the BC matrix. Antibacterial activity test results showed that the Ag-BC composite had the ability to inhibit the bacteria S. typhimurium and S. aureus with good inhibition. This result showed the potential application of Ag-BC composite from Siwalan plant as a natural material for medical and pharmaceutical purpose, especially as an antibacterial agent.

scholarly journals Synthesis, Characterization, and Antibacterial Activity of Ag2O-Loaded Polyethylene Terephthalate Fabric via Ultrasonic Method

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 450 ◽  
Author(s):  
Armin Rajabi ◽  
Mariyam Ghazali ◽  
Ebrahim Mahmoudi ◽  
Amir Baghdadi ◽  
Abdul Mohammad ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Polyethylene Terephthalate ◽  
Ultrasonic Method ◽  
Antibacterial Properties ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Key Factor ◽  
Effects Of Ph ◽  
Testing Field

In this study, Ag2O was synthesized on polyethylene terephthalate fabrics by using an ultrasonic technique with Ag ion reduction in an aqueous solution. The effects of pH on the microstructure and antibacterial properties of the fabrics were evaluated. X-ray diffraction confirmed the presence of Ag2O on the fabrics. The fabrics were characterized by Fourier transform infrared spectroscopy, ultraviolet–visible spectroscopy, and wettability testing. Field-emission scanning electron microscopy verified that the change of pH altered the microstructure of the materials. Moreover, the antibacterial activity of the fabrics against Escherichia coli was related to the morphology of Ag2O particles. Thus, the surface structure of Ag2O particles may be a key factor of the antibacterial activity.

Antibacterial activity of an NIR-induced Zn ion release film

2020 ◽  
Vol 8 (3) ◽  
pp. 406-415 ◽  
Author(s):  
Tingting Yang ◽  
Donghui Wang ◽  
Xuanyong Liu
Keyword(s):  
Antibacterial Activity ◽  
Antibacterial Properties ◽  
Ion Release ◽  
Surface Enhanced ◽  
Ion Carrier

The polydopamine containing Zn element as an ion carrier and heat-induced release film on GNRs-Ti surface enhanced the antibacterial properties.

Investigation of the properties of PAN/f-MWCNTs/AgNPs composite nanofibers

2016 ◽  
Vol 47 (2) ◽  
pp. 149-172 ◽  
Author(s):  
Nuray Kizildag ◽  
Nuray Ucar
Keyword(s):  
Carbon Nanotubes ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Silver Nitrate ◽  
Composite Nanofibers ◽  
Chemical Reduction ◽  
Antimicrobial Properties ◽  
Reduction Process ◽  
Silver Ions ◽  
Mwcnt Content

In this study, composite nanofibers from a solution of polyacrylonitrile (PAN), functionalized multi-walled carbon nanotubes (f-MWCNTs), and silver nitrate (AgNO3) in dimethylsulfoxide were successfully produced by the electrospinning method. Aqueous solution of hydrazinium hydroxide was used for the chemical reduction of silver ions. The effects of the simultaneous use of carbon nanotubes (either pristine or amine-functionalized) and silver nitrate in different percentages and the application of chemical reduction on the properties of the nanocomposite nanowebs were investigated. FTIR, SEM, conductivity meter, tensile tester, XRD, and DSC were used for the characterization. Antibacterial activities of the nanocomposite nanowebs were determined against S. Aureus. Full factorial experimental design was utilized in order to be able to evaluate the contributions of the selected factors (f-MWCNT content, AgNO3 content, and application of reduction process) to the variations in ultimate tensile strength, elongation, and conductivity of the composite nanowebs. Analysis of variance (ANOVA) and multiple comparisons were carried out to evaluate the average nanofiber diameters and mechanical properties. PAN/f-MWCNTs/AgNPs nanowebs displayed enhanced conductivity and antimicrobial properties particularly when the chemical reduction process was applied. Besides they showed improved crystallinity compared with pure PAN nanofibers. While the reduction process made the highest contribution to the ultimate tensile strength, elongation, and conductivity of the nanowebs, f-MWCNT content had negligible effect on conductivity of the nanowebs. Considering all the results obtained in this study, composite nanofiber webs of PAN with 1 w% f-MWCNTs and 1 w%AgNO3 can be suggested for use as antistatic and antibacterial filaments.

scholarly journals Development of a Bioactive Flowable Resin Composite Containing a Zinc-Doped Phosphate-Based Glass

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2311
Author(s):  
Myung-Jin Lee ◽  
Young-Bin Seo ◽  
Ji-Young Seo ◽  
Jeong-Hyun Ryu ◽  
Hyo-Ju Ahn ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Flexural Strength ◽  
Resin Composite ◽  
Antibacterial Properties ◽  
Inhibition Zone ◽  
Dental Restoration ◽  
Composite Resins ◽  
Control Group ◽  
Ion Release ◽  
Secondary Caries

Flowable resins used for dental restoration are subject to biofilm formation. Zinc has antibacterial properties. Thus, we prepared a zinc-doped phosphate-based glass (Zn-PBG) to dope a flowable resin and evaluated the antibacterial activity of the composite against Streptococcus mutans (S. mutans) to extrapolate the preventative effect toward secondary caries. The composites were prepared having 0 (control), 1.9, 3.8, and 5.4 wt.% Zn-PBG. The flexural strength, elastic modulus, microhardness, depth of cure, ion release, inhibition zone size, and number of colony-forming units were evaluated and analyzed using ANOVA. The flexural strength of the control was significantly higher than those of Zn-PBG samples (p < 0.05). However, all samples meet the International Standard, ISO 4049. The microhardness was not significantly different for the control group and 1.9 and 3.8 wt.% groups, but the 5.4 wt.% Zn-PBG group had a significantly lower microhardness (p < 0.05). Further, the composite resins increasingly released P, Ca, Na, and Zn ions with an increase in Zn-PBG content (p < 0.05). The colony-forming unit count revealed a significant reduction in S. mutans viability (p < 0.05) with increase in Zn-PBG content. Therefore, the addition of Zn-PBG to flowable composite resins enhances antibacterial activity and could aid the prevention of secondary caries.

scholarly journals Synthesis and Comparative Antibacterial Activity of Fatty Acid Capped Silver Nanoparticles

2020 ◽  
Vol 14 (3) ◽  
pp. 1941-1947
Author(s):  
Rama Sharma
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Fatty Acid ◽  
Room Temperature ◽  
Reduction Method ◽  
Chemical Reduction ◽  
Inert Atmosphere ◽  
Chemical Reduction Method ◽  
Visible Spectroscopy ◽  
E Coli

In the present work, the chemical reduction method has been used to synthesize silver nanoparticles using stearic acid capping agents in different concentrations. These nanoparticles are characterized by ultraviolet-visible spectroscopy and dynamic light scattering (DLS). The size of the synthesized silver nanoparticles found between 80-100 nm and stable up to 5 months. These nanoparticles show a very good bactericidal influence on E. coli and S. aureus. In this method silver nanoparticles have synthesized at room temperature without using any inert atmosphere, this is the advantage of this method over others.

scholarly journals Preparation of nanocomposite silver/kaolin with antibacterial properties

2021 ◽  
Vol 340 ◽  
pp. 01030
Author(s):  
Balnur Baltabayeva ◽  
Aliya Ospanova ◽  
Zhanar Kubasheva
Keyword(s):  
Antibacterial Activity ◽  
Chemical Reduction ◽  
Antibacterial Properties ◽  
Chemical Properties ◽  
Silica Matrix ◽  
Gram Positive Bacteria ◽  
Composition And Structure ◽  
Bet Method ◽  
Mobile Ions ◽  
Physical And Chemical

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).

scholarly journals Application of Nano Silver/Lecithin on Wool through Various Methods: Antibacterial Properties and Cell Toxicity

2014 ◽  
Vol 9 (4) ◽  
pp. 155892501400900 ◽  
Author(s):  
Hossein Barani ◽  
Majid Montazer ◽  
Nasrin Samadi ◽  
Tayebeh Toliyat ◽  
Mohsen Khorashadi Zadeh ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Inductively Coupled Plasma ◽  
Low Voltage ◽  
Chemical Reduction ◽  
Antibacterial Properties ◽  
Emission Spectrometry ◽  
Wool Fabric ◽  
Cytotoxicity Test ◽  
Wool Fabrics ◽  
Loading Efficiency

Silver nanoparticles (AgNPs) were synthesized with lecithin through a simple chemical reduction method. The prepared AgNPs/lecithin was then loaded into the wool fabric by exhaustion and pad-dry-cure methods. The surface morphology of the loaded wool fabrics was characterized by low-voltage scanning electron microscopy, and the loading efficiency was determined by inductively coupled plasma optical emission spectrometry. Further, the effect of the different lecithin concentrations was examined on the antibacterial activity, cytotoxicity, and color of the loaded wool fabrics. The loaded fabric with AgNPs at a higher lecithin ratio presented higher antibacterial activity due to the higher loading efficiency and smaller nanoparticle size. Also, the morphology of the fibroblast cells in cytotoxicity test was not changed in presence of extracted solution from the treated wool fabrics with different lecithin concentration.

Synthesis and Antibacterial Activity of Silver Nanoparticles Against Escherichia coli and Pseudomonas sp.

2021 ◽  
Author(s):  
Md. Irfanul Hoque ◽  
Sultana Afrin Jahan Rima ◽  
Md. Salah Uddin ◽  
M. Julkarnain
Keyword(s):  
Escherichia Coli ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Chemical Reduction ◽  
Bacterial Species ◽  
Sodium Dodecyl ◽  
Antibacterial Properties ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
X Ray Diffraction

Silver nanoparticles (AgNPs) have been synthesized by chemical reduction method using ascorbic acid as reducing agent. Silver nitrate (AgNO[Formula: see text] and sodium dodecyl sulfate (SDS) have been used as precursor and stabilizer, respectively. The prepared samples were characterized by UV-visible spectroscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The antibacterial activity of prepared silver nanoparticles has been assessed by using the disc diffusion method against pathogenic, gram-negative bacterial strains including Escherichia coli and Pseudomonassp. To evaluate the potential antibacterial properties of AgNPs, the discs have been impregnated and dried with three different doses like 50, 100 and 150[Formula: see text][Formula: see text]l of 20[Formula: see text][Formula: see text]g/ml concentrated AgNPs solution and placed on the Petri-dishes. The antibiotic kanamycin (5[Formula: see text][Formula: see text]g) was used as control. In all the cases, a clear and distinct zone of inhibition is observed, which suggests that AgNPs can be used as effective growth inhibitors of various bacterial species and would be promising candidate for future development of antibacterial agents.

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