scholarly journals Polyvinyl alcohol/silver electrospun nanofibers: Biocidal filter media capturing virus‐size particles

2021 ◽  
pp. 51380
Author(s):  
Magda Blosi ◽  
Anna Luisa Costa ◽  
Simona Ortelli ◽  
Franco Belosi ◽  
Fabrizio Ravegnani ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Filter Media ◽  
Virus Size

Preparation of fully hydrolyzed polyvinyl alcohol electrospun nanofibers with diameters of sub-200 nm by viscosity control

2012 ◽  
Vol 82 (16) ◽  
pp. 1635-1644 ◽  
Author(s):  
Fan Liu ◽  
Tomohiro Nishikawa ◽  
Wataru Shimizu ◽  
Takaaki Sato ◽  
Hisanao Usami ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers

scholarly journals Evaluation of the Antimicrobial Effect of Chitosan/Polyvinyl Alcohol Electrospun Nanofibers Containing Mafenide Acetate

2015 ◽  
Vol 8 (10) ◽  
Author(s):  
Mohammadreza Abbaspour ◽  
Behzad Sharif Makhmalzadeh ◽  
Behjat Rezaee ◽  
Saeed Shoja ◽  
Zohreh Ahangari
Keyword(s):  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Antimicrobial Effect

Using PVA/CA/Au NPs electrospun nanofibers as a green nanosorbent to preconcentrate and determine Pb2+ and Cu2+ in rice samples, water sources and cosmetics

2020 ◽  
Vol 44 (35) ◽  
pp. 15000-15009
Author(s):  
Zahra Mehrani ◽  
Zahra Karimpour ◽  
Homeira Ebrahimzadeh
Keyword(s):  
Citric Acid ◽  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Water Sources ◽  
Au Nps ◽  
Rice Samples

Polyvinyl alcohol (PVA)/citric acid (CA)/Au NPs electrospun nanofibers was synthesized and applied as a green and efficient sorbent to extract and preconcentrate Pb2+ and Cu2+ from water sources, rice samples and cosmetics before FAAS.

scholarly journals Evaluation of chemical and physical properties of biodegradable gum Arabic/PVA/Ag nanofibrous membranes as a potential wrapping material

2020 ◽  
Vol 15 ◽  
pp. 155892502094645
Author(s):  
Mayza Ibrahim ◽  
Michal Krejčík ◽  
Karel Havlíček ◽  
Stanislav Petrík ◽  
Mohamed Eldessouki
Keyword(s):  
Polyvinyl Alcohol ◽  
Food Packaging ◽  
Mechanical Performance ◽  
Micrococcus Luteus ◽  
Gum Arabic ◽  
Electrospun Nanofibers ◽  
Longitudinal Direction ◽  
Inhibition Zone ◽  
Electrospinning Technique ◽  
Direction Parallel

There is a growing public interest in utilizing biomass and biomaterials to obtain products with high sustainability and less harm to the environment. This study reports on using electrospinning technique to produce nanofiber membranes based on homogeneous polymeric blends of gum Arabic, polyvinyl alcohol, and silver nanoparticles. The produced interconnected membranes were cross-linked via heat and plasma treatments, and the membranes were characterized for their chemical and physical characteristics. Fourier transform infrared spectroscopy shows a cross-linking of gum Arabic and polyvinyl alcohol through esterification during the heat treatment, and through graft polymerization with methyl groups after methane plasma treatment. The mechanical performance of the membranes showed an increase in the modulus of elasticity in the longitudinal direction (parallel to electrospun nanofibers) from 85 ± 4 MPa to 148 ± 5 MPa compared with the transverse direction. Also, well-dispersed nanoparticles in the spinning solution tend to increase the elasticity from 41 ± 3 MPa to 148 ± 5 MPa, while the agglomeration of these nanoparticles decreases the mechanical properties of the nanofibers. Results of the biodegradation tests confirmed the significant biodegradable nature of the produced nanofibers, where 99.09% of the material was degraded within 28 days. Moreover, samples showed significant bactericidal activity against Micrococcus luteus with significantly less-observed bacteria in the measured plate, while the inhibition zone for Escherichia coli was 1 cm. The produced biodegradable electrospun membranes have multiple potential applications in many fields; especially for medical, antibacterial, and food packaging. This work reports the results for moisture and oxygen transfer of the membranes as a proposed application in food wrapping.

SILICON CARBIDE NANOWIRES FROM POLYVINYL ALCOHOL/SILICA ELECTROSPUN NANOFIBERS

NANO ◽  
2011 ◽  
Vol 06 (01) ◽  
pp. 41-45 ◽  
Author(s):  
H. DELAVARI H. ◽  
M. KOKABI
Keyword(s):  
Electron Microscopy ◽  
Silicon Carbide ◽  
Polyvinyl Alcohol ◽  
Gas Flow ◽  
Electrospun Nanofibers ◽  
Average Diameter ◽  
Sic Nanowires ◽  
Transmission Electron ◽  
Temperature Scanning ◽  
Vs Mechanism

The catalyst-free synthesis of silicon carbide (SiC) nanowires was carried out from polyvinyl alcohol (PVA)/silica electrospun nanofibers at high temperature. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and thermogravimetery analysis (TGA) were employed to study morphology and formation of SiC nanowires. Based on the TGA analysis, the carbon yield was increased when inert gas flow rate and heating rate decreased and polymeric nanofibers has been stabilized. The XRD and TEM results showed that the produced nanowires were crystalline β- SiC and rather homogeneous in thickness with an average diameter around 50 to 70 nm and a length of more than 10 μm. Finally, a possible growth mechanism of β- SiC nanowire based on a vapor–solid (VS) mechanism was proposed.

Adhesion strength and viscoelastic properties of polydimethylsiloxane (PDMS) based elastomeric nanocomposites with embedded electrospun nanofibers

Soft Matter ◽  
2019 ◽  
Vol 15 (28) ◽  
pp. 5739-5747 ◽  
Author(s):  
Tushar D. Deshpande ◽  
Yogesh R. G. Singh ◽  
Sandip Patil ◽  
Yogesh M. Joshi ◽  
Ashutosh Sharma
Keyword(s):  
Polyvinyl Alcohol ◽  
Adhesion Strength ◽  
Viscoelastic Properties ◽  
Electrospun Nanofibers ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive

In the present study, the adhesive and viscoelastic properties of polydimethylsiloxane (PDMS) based nanocomposite pressure sensitive adhesives (PSAs) with embedded electrospun polyacrylonitrile (PAN) and polyvinyl alcohol (PVA) nanofibers as fillers were investigated.

Surface Modification of Electrospun Polyethylenimine/Polyvinyl Alcohol Nanofibers Immobilized with Silver Nanoparticles for Potential Antibacterial Applications

2020 ◽  
Vol 16 ◽  
Author(s):  
Xiangyang Shi ◽  
Pengchao Liu ◽  
Yunpeng Huang ◽  
Xu Fang ◽  
Hui Ma ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Cell Viability Assay ◽  
High Antibacterial Activity ◽  
Viability Assay ◽  
In Vitro Antibacterial Activity ◽  
Biological Protection

Objective: In order to investigate the potential biomedical applications of silver nanoparticle (Ag NP)-immobilized electrospun nanofibers with different surface functionalities. <P> Methods: silver nanoparticles were immobilized within water-stable electrospun polyethylenimine (PEI)/polyvinyl alcohol (PVA) nanofibers by an in-situ reduction method after complexing Ag+ ions with the free PEI amine groups. The obtained Ag NP-incorporated PEI/PVA nanofibers were then hydroxylated, carboxylated, and acetylated to generate different surface functionalities. Different techniques were employed to characterize the Ag NP-containing nanofibers with different surface functionalities. <P> Results: In vitro antibacterial activity tests show that Ag NP-containing nanofibrous mats have a high antibacterial activity and are capable of inhibiting the growth of both S. aureus and E. coli bacteria. Cell viability assay data show that the Ag NP-containing nanofibers are cytocompatible, and those treated by hydroxylation and acetylation display better cytocompatibility than those treated by carboxylation and the pristine non-modified fibers to promote cell adhesion and proliferation. <P> Conclusion: Therefore, the hydroxylated or acetylated Ag NP-containing PEI/PVA nanofibers have a great potential for wound dressing, biological protection and tissue engineering applications

Deposition of MOFs on Polydopamine-Modified Electrospun Polyvinyl Alcohol/Silica Nanofibers Mats for Chloramphenicol Adsorption in Water

NANO ◽  
2020 ◽  
Vol 15 (04) ◽  
pp. 2050046 ◽  
Author(s):  
Aowen Li ◽  
Meimei Zhou ◽  
Pingping Luo ◽  
Jiaxin Shang ◽  
Pengbo Wang ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Electrospun Nanofibers ◽  
Silica Network ◽  
Inorganic Hybrid ◽  
Application Range ◽  
Hybrid Nanofiber ◽  
Nanofiber Mats

Nanofiber mats produced by electrospinning, with the advantages of specific surface area, porosity and chemical tenability, are an ideal support material for deposition of metal[Formula: see text]organic framework (MOF) crystals. In this study, four types of MOFs (MIL-53(Al), ZIF-8, UiO-66-NH2 and NH2-MIL-125(Ti)) were deposited on polydopamine (PDA)-modified electrospun polyvinyl alcohol (PVA)/SiO2 organic[Formula: see text]inorganic hybrid nanofiber mats by bulky synthesis. Because of the formation of Si–O–C–O–Si bridges between PVA chains and silica network, electrospun PVA/SiO2 organic[Formula: see text]inorganic hybrid nanofiber mats are quite stable in water or organic solvents and at high temperature are suitable as supports for MOFs deposition. The PDA layer, which exhibits a powerful adhesive ability to attach foreign objects, can effectively improve growth of MOFs on the surface of PVA/SiO2 nanofiber mats. The obtained MOF composites combining the unique properties of electrospun nanofibers mats and MOFs particles become flexible and tailorable, greatly expanding the application range of MOFs materials. The synthesized MOF composites were used to adsorb chloramphenicol (CAP) in water. It was found that the four MOF composites could remove CAP from water effectively and MIL-53(Al) composite had the highest adsorption capacity due to the higher specific surface area.

Improved thermostable polyvinyl alcohol electrospun nanofibers with entangled naringinase used in a novel mini-packed bed reactor

2016 ◽  
Vol 213 ◽  
pp. 208-215 ◽  
Author(s):  
Mário A.P. Nunes ◽  
Samuel Martins ◽  
M. Emilia Rosa ◽  
Pedro M.P. Gois ◽  
Pedro C.B. Fernandes ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers ◽  
Packed Bed ◽  
Packed Bed Reactor
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