scholarly journals Surface Modification of Polyester-Fabric with Hydrogels and Silver Nanoparticles: Photochemical Versus Gamma Irradiation Methods

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3284 ◽  
Author(s):  
Kathleen A. Montoya-Villegas ◽  
Alejandro Ramírez-Jiménez ◽  
Ángel Licea-Claverie ◽  
Sergio Pérez-Sicairos ◽  
Emilio Bucio ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Gamma Irradiation ◽  
Polyester Fabric ◽  
Hydroxyethyl Methacrylate ◽  
Photochemical Method ◽  
Photochemical Crosslinking ◽  
Poly Ethylene ◽  
Coated Fabrics

A Gamma irradiation and photochemical crosslinking/grafting of poly(2-hydroxyethyl methacrylate) (PHEMA) and poly(2-hydroxyethyl methacrylate-co-poly(ethylene glycol) methacrylate) (poly(HEMA-co-PEGMA)) hydrogels onto polyethyleneterephtalate fabric (PET) surfaces were evaluated, in order to obtain a hydrophilic homogeneous coating onto PET fabrics. The materials were characterized by FTIR-ATR, SEM, EDS, and thermal analysis. Furthermore, silver nanoparticles (AgNPs) were loaded by in situ reduction of AgNO3, and its antibacterial activity against Staphylococcus aureus and Escherichia coli was determined. Results showed a ticker coating of hydrogel using gamma radiation and stronger in deep modification of the fibers; however, by the photochemical method, a thin coating with good coverage of PET surface was obtained. The differences in hydrophilicity, thermal properties, and antibacterial activity of the coated fabrics by using both methods were rather small.

Synthesis and Antibacterial Activity of Silver Nanoparticles Embedded in Smart Poly(N-Isopropylacrylamide)-Based Hydrogel Networks

2011 ◽  
Vol 2 (4) ◽  
Author(s):  
Fereshteh Valipour ◽  
Majid Esmhosseini ◽  
Kamelia Nejati ◽  
Hasan Kianfar ◽  
Ardalan Pasdaran ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Methacrylic Acid ◽  
Cross Linking ◽  
Hydroxyethyl Methacrylate ◽  
In Situ Reduction ◽  
Vis Spectroscopy ◽  
Cross Linker ◽  
Triethyleneglycol Dimethacrylate

In recent study, we report the synthesis and antibacterial activity of silver nanoparticles embedded in smart poly(N-isopropylacrylamide)-based hydrogel networks. A series of thermosensitive poly(N-isopropylacrylamide-methacrylic acid-hydroxyethyl methacrylate) [P(NIPAAm-MAA-HEM)] with various cross-linking ratio have been obtained by cross-linking free radical polymerization of N-isopropylacrylamide (NIPAAm), methacrylic acid (MAA), and hydroxyethyl methacrylate (HEM) in the presence of triethyleneglycol dimethacrylate (TEGDMA) as cross-linker. Highly stable and uniformly distributed silver nanoparticles have been obtained with hydrogel networks via in situ reduction of silver nitrate (AgNO3) using sodium borohydride (NaBH4) as reducing agent. The formation of silver nanoparticles has been confirmed with ultraviolet visible (UV–Vis) spectroscopy. Scanning electron microscopy (SEM) results demonstrated that employed hydrogels have regulated the silver nanoparticles size to 50–150 nm. The preliminary antibacterial activity performed to these hydrogel–silver nanocomposites.

A green in situ synthesis of silver nanoparticles on cotton fabrics using Aloe vera leaf extraction for durable ultraviolet protection and antibacterial activity

2016 ◽  
Vol 87 (19) ◽  
pp. 2407-2419 ◽  
Author(s):  
Qingqing Zhou ◽  
Jingchun Lv ◽  
Yu Ren ◽  
Jiayi Chen ◽  
Dawei Gao ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Aloe Vera ◽  
Cotton Fabrics ◽  
In Situ Synthesis ◽  
Uv Protection ◽  
X Ray ◽  
Jcpds File ◽  
Laundering Durability

This study presented a simple and environmentally friendly method of in situ synthesis of silver nanoparticles (AgNPs) on cotton fabrics for durable ultraviolet (UV) protection and antibacterial activity using Aloe vera leaf extraction (AVE) as a reducing and stabilizing agent. Cotton fabrics were pretreated in water, and then immersed in AgNO3 and AVE, respectively. Cotton fabrics were characterized by small angle X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetric analysis, UV protection, antibacterial activity, and laundering durability. Comparing with the smooth surface of the control cotton fabric, SEM and energy dispersive X-ray spectrometry (EDX) results showed that there were a considerable number of Ag2O and AgNPs loading on the surface of the pretreated and Ag loaded cotton fabrics. The XRD pattern indicated, respectively, the existence of Ag2O and AgNPs, the structures of which were similar to JCPDS File No.65-3289 and JCPDS File No. 01-071-4613 on the pretreated and Ag loaded cotton fabrics. The pretreated and Ag loaded cotton fabrics showed excellent UV protection, antibacterial activity, and laundering durability, especially the Ag loaded cotton fabric, of which the UV protection factor value and transmission of UVA were 148 and 1.11%, respectively, after 20 washing cycles, and the clear zone width was more than 4 mm against E. coli or S. aureus. AgNPs facilitated the improvement of the thermal property of the cotton fabrics. Thus this facile in situ reduction of AgNPs with AVE may bring a promising and green strategy to produce functional textiles.

scholarly journals Study on antibacterial activity of silver nanoparticles synthesized by gamma irradiation method using different stabilizers

2014 ◽  
Vol 9 (1) ◽  
pp. 162 ◽  
Author(s):  
Dang Van Phu ◽  
Le Quoc ◽  
Nguyen Duy ◽  
Nguyen Thi Lan ◽  
Bui Du ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Gamma Irradiation

Antibacterial Activity of Electrospun Nanocomposites fabricated by in situ Chitosan/Silver Nanoparticles

2021 ◽  
pp. 1-1
Author(s):  
Yunnuen Zepeda Cortes ◽  
Loreto Margarita Valenzuela ◽  
Eduardo Arturo Elizalde Pena ◽  
Beatriz Liliana Espana Sanchez
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity

Preparation and Antimicrobial Activity of Antibacterial Silver-Loaded Polyphosphazene Microspheres

2021 ◽  
Vol 21 (10) ◽  
pp. 5120-5130
Author(s):  
Hui Long ◽  
Wei-Cong Kuang ◽  
Shi-Liang Wang ◽  
Jing-Xian Zhang ◽  
Lang-Huan Huang ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Thermal Stability ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Antibacterial Agents ◽  
Good Thermal Stability ◽  
Polymerization Method

Poly(cyclotriphosphazene-co-4,4’-diaminodiphenyl ether) (PPO) microspheres were prepared via a precipitation polymerization method, using hexachlorocyclotriphosphazene (HCCP) and 4,4’-diaminodiphenyl ether (ODA) as monomers. Silver-loaded PPO (PPOA) microspheres were generated by the in situ loading of silver nanoparticles onto the surface by Ag+ reduction. Our results showed that PPOA microspheres were successfully prepared with a relatively uniform distribution of silver nanoparticles on microsphere surfaces. PPOA microspheres had good thermal stability and excellent antibacterial activity towards Escherichia coli and Staphylococcus aureus. Furthermore, PPOA microspheres exhibited lower cytotoxicity when compared to citrate-modified silver nanoparticles (c-Ag), and good sustained release properties. Our data indicated that polyphosphazene-based PPOA microspheres are promising antibacterial agents in the biological materials field.

An electrically conductive hybrid polyaniline/silver-coated polyester fabric for smart applications

2019 ◽  
Vol 50 (5) ◽  
pp. 754-769 ◽  
Author(s):  
Mostafa Youssefi ◽  
Fereshteh Motamedi
Keyword(s):  
Electrical Conductivity ◽  
In Situ Polymerization ◽  
Silver Ions ◽  
Average Diameter ◽  
Polyester Fabric ◽  
Gravimetric Analysis ◽  
Water Contact ◽  
Coated Fabric ◽  
Coated Fabrics

A highly conductive polyester fabric was fabricated by the two-step successive in situ polymerization of aniline. This was followed by silver electroless plating on the surface of the fabric. Also, a silver electroless-plated fabric and a PANI-coated fabric were prepared by the in situ chemical polymerization of aniline. The electrical conductivity measurements, scanning electron microscopy, thermal gravimetric analysis, water contact angle measurements, wide angle X-ray diffraction, Fourier transform infrared spectroscopy, and air permeability tests were conducted on the coated fabrics. It was found that the surface of the hybrid PANI/silver-coated fabric was coated with granular silver particles having the average diameter of 1.3 µm. Besides, the amount of the reduced silver on the surface of the fabric was much higher than that in the silver electroless-plated fabric. The emeraldine form of PANI was oxidized to pernigraniline and the silver ions were reduced to silver metal particles. The hybrid PANI/silver-coated fabric showed the electrical conductivity of 2.63 × 103 Scm−1; so, it could be applied in many smart wearable applications.

scholarly journals Enhancement in the antibacterial activity of cephalexin by its delivery through star-shaped poly(ε-caprolactone)-block-poly(ethylene oxide) coated silver nanoparticles

2020 ◽  
Vol 7 (10) ◽  
pp. 201097
Author(s):  
Sana Rahim ◽  
Samina Perveen ◽  
Shakil Ahmed ◽  
Muhammad Raza Shah ◽  
Muhammad Imran Malik
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Ethylene Oxide ◽  
Inhibitory Concentration ◽  
Bacterial Cells ◽  
Force Microscopy ◽  
Atomic Force ◽  
Biofilm Destruction ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

The antibacterial activity of silver nanoparticles (AgNPs) stabilized with a four-armed star-shaped poly(ε-caprolactone)-block-poly(ethylene oxide) copolymer [St-P(CL-b-EO)] and its application as a drug delivery vehicle for cephalexin (Cp) was evaluated against pathogenic Staphylococcus aureus . The prepared AgNPs were characterized by ultraviolet-visible spectroscopy, Fourier transform infrared spectroscopy, zeta sizer and atomic force microscopy (AFM). The antibacterial efficiency of Cp is enhanced several-fold by its delivery through complexation with St-P(CL-b-EO)-AgNPs, monitored by microplate assay and biofilm destruction studies. Finally, the visual destruction of bacterial cells and its biofilms by employing Cp and its conjugates at their minimum inhibitory concentration (MIC 50 ) and minimum biofilm inhibitory concentration (MBIC 50 ), respectively, is observed by topographic imaging by AFM. Enhanced antibacterial activity of St-P(CL-b-EO)-AgNPs loaded Cp is attributed to penetrative nature of the drug cargo St-P(CL-b-EO)-AgNPs towards the bacterial cell wall.

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