scholarly journals Hybrid levan–Ag/AgCl nanoparticles produced by UV-irradiation: properties, antibacterial efficiency and application in bioactive poly(vinyl alcohol) films

RSC Advances ◽  
2021 ◽  
Vol 11 (62) ◽  
pp. 38990-39003
Author(s):  
Anissa Haddar ◽  
Emna Ben Ayed ◽  
Assaad Sila ◽  
Jean-Luc Putaux ◽  
Ali Bougatef ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Uv Irradiation ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Antibacterial Efficiency ◽  
High Antibacterial Activity ◽  
Agcl Nanoparticles

Hybrid Ag/AgCl nanoparticles with high antibacterial activity were synthesised using bacterial levan.

scholarly journals Modified Silica Nanofibers with Antibacterial Activity

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Ivana Veverková ◽  
Irena Lovětinská-Šlamborová
Keyword(s):  
Antibacterial Activity ◽  
Copper Nanoparticles ◽  
Vinyl Alcohol ◽  
Wound Dressing ◽  
Process Time ◽  
Poly Vinyl Alcohol ◽  
Modified Silica ◽  
Antibacterial Efficiency ◽  
Silica Nanofibers ◽  
Adsorbed Silver

This study is focused on development of functionalized inorganic-organic nanofibrous material with antibacterial activity for wound dressing applications. The nanofibers combining poly(vinyl alcohol) and silica were produced by electrospinning from the sol and thermally stabilized. The PVA/silica nanofibers surface was functionalized by silver and copper nanoparticles to ensure antibacterial activity. It was proven that quantity of adsorbed silver and copper nanoparticles depends on process time of adsorption. According to antibacterial tests results, this novel nanofibrous material shows a big potential for wound dressing applications due to its significant antibacterial efficiency.

Electrospun poly(vinyl alcohol) nanofibrous membranes containing Coptidis Rhizoma extracts for potential biomedical applications

2018 ◽  
Vol 89 (17) ◽  
pp. 3506-3518 ◽  
Author(s):  
Jin Jeong ◽  
Seungsin Lee
Keyword(s):  
Antibacterial Activity ◽  
Vinyl Alcohol ◽  
Drug Carrier ◽  
Drug Loading ◽  
Antibacterial Properties ◽  
Wound Dressings ◽  
Poly Vinyl Alcohol ◽  
High Antibacterial Activity ◽  
Coptidis Rhizoma ◽  
Nanofibrous Membranes

Coptidis Rhizoma is a medicinal plant that is well known for its high antibacterial activity against various pathogens and its anti-inflammatory, antioxidant, and hemostatic effects. Here, nanofibrous membranes containing 10, 20, and 30 wt% of Coptidis Rhizoma extracts were fabricated by electrospinning using poly(vinyl alcohol) as the drug carrier and thermally treated to increase their aqueous stability. The antibacterial properties and release characteristics of Coptidis Rhizoma nanofibrous membranes were investigated. Coptidis Rhizoma-loaded nanocomposite fibers exhibited a high drug-loading efficiency ranging from 92% to 97%. The release profile from the nanofibrous membranes of Coptidis Rhizoma showed an initial fast release followed by a gradual release for 48 h. High antibacterial activity of the Coptidis Rhizoma-loaded nanofibrous membranes was exhibited against both Staphylococcus aureus and Staphylococcus epidermidis. These results demonstrate that poly(vinyl alcohol) nanofibrous membranes containing Coptidis Rhizoma extracts have considerable potential to be effective antimicrobial wound dressings based on natural substances.

scholarly journals The Design, Characterization and Antibacterial Activity of Heat and Silver Crosslinked Poly(Vinyl Alcohol) Hydrogel Forming Dressings Containing Silver Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 96
Author(s):  
John Jackson ◽  
Helen Burt ◽  
Dirk Lange ◽  
In Whang ◽  
Robin Evans ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Silver Nitrate ◽  
Vinyl Alcohol ◽  
Unmet Need ◽  
Chemical Characterization ◽  
Wound Dressings ◽  
Poly Vinyl Alcohol ◽  
Burn Wound

The prompt treatment of burn wounds is essential but can be challenging in remote parts of Africa, where burns from open fires are a constant hazard for children and suitable medical care may be far away. Consequently, there is an unmet need for an economical burn wound dressing with a sustained antimicrobial activity that might be manufactured locally at low cost. This study describes and characterizes the novel preparation of a silver nitrate-loaded/poly(vinyl alcohol) (PVA) film. Using controlled heating cycles, films may be crosslinked with in situ silver nanoparticle production using only a low heat oven and little technical expertise. Our research demonstrated that heat-curing of PVA/silver nitrate films converted the silver to nanoparticles. These films swelled in water to form a robust, wound-compatible hydrogel which exhibited controlled release of the antibacterial silver nanoparticles. An optimal formulation was obtained using 5% (w/w) silver nitrate in PVA membrane films that had been heated at 140 °C for 90 min. Physical and chemical characterization of such films was complemented by in vitro studies that confirmed the effective antibacterial activity of the released silver nanoparticles against both gram positive and negative bacteria. Overall, these findings provide economical and simple methods to manufacture stable, hydrogel forming wound dressings that release antibiotic silver over prolonged periods suitable for emergency use in remote locations.

The influence of UV-irradiation on the poly(vinyl alcohol)/hyaluronic acid film properties

2019 ◽  
Vol 680 (1) ◽  
pp. 85-95
Author(s):  
J. Skopinska-Wisniewska ◽  
J. Kozlowska ◽  
S. Grabska ◽  
N. Stachowiak ◽  
B. Kaczmarek ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Uv Irradiation ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Film Properties

Influence of poly(vinyl alcohol) on cellulose photochemical stability in cryogels during UV irradiation

2015 ◽  
Vol 297 ◽  
pp. 20-30 ◽  
Author(s):  
Cristian-Dragos Varganici ◽  
Liliana Rosu ◽  
Oana Maria Mocanu (Paduraru) ◽  
Dan Rosu
Keyword(s):  
Uv Irradiation ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Photochemical Stability

scholarly journals Antibacterial Activity and Drug Loading of Moxifloxacin-Loaded Poly(Vinyl Alcohol)/Chitosan Electrospun Nanofibers

2021 ◽  
Vol 8 ◽  
Author(s):  
Qi Liu ◽  
Wen-Chong Ouyang ◽  
Xiu-Hong Zhou ◽  
Tao Jin ◽  
Zheng-Wei Wu
Keyword(s):  
Antibacterial Activity ◽  
Vinyl Alcohol ◽  
Composite Nanofibers ◽  
Drug Loading ◽  
Antibacterial Properties ◽  
Electrospun Nanofibers ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
Blank Group

In this study, nanofibers with different ratios of poly(vinyl alcohol) and chitosan incorporated with moxifloxacin hydrochloride (MH/PVA/CS) were fabricated through the blending electrospinning, and the morphological features were tested using scanning electron microscopy (SEM). Further characterization of the new nanofiber was accomplished by Thermogravimetric analysis (TG), X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). Antibacterial activity of the MH-loaded nanofibers at different drug loading were tested and compared with the blank group. Experimental results show that the MH/PVA/CS nanofibers exhibited the good antibacterial properties against Staphylococcus aureus and Pseudomonas aeruginosa due to the MH incorporation. Compared with blank nanofibers, MH/PVA/CS nanofibers have significantly better antibacterial properties, and different proportions of PVA and CS have a certain effect on the antibacterial activity of nanofibers. The conclusions in this paper show that MH/PVA/CS composite nanofibers may have great potential in antibacterial materials.

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