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.

In situ citric acid crosslinking of alginate/polyvinyl alcohol electrospun nanofibers

2013 ◽  
Vol 112 ◽  
pp. 32-35 ◽  
Author(s):  
Stephanie A. Stone ◽  
Pallavi Gosavi ◽  
Thushara J. Athauda ◽  
Ruya R. Ozer
Keyword(s):  
Citric Acid ◽  
Polyvinyl Alcohol ◽  
Electrospun Nanofibers

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 Size-Controlled Preparation of Gold Nanoparticles Deposited on Surface-Fibrillated Cellulose obtained by Citric Acid-Modification

2020 ◽  
Author(s):  
Chutimasakul Threeraphat ◽  
Yuta Uetake ◽  
Jonggol Tantirungrotechai ◽  
Taka-Aki Asoh ◽  
Hiroshi Uyama ◽  
...  
Keyword(s):  
Particle Size ◽  
Citric Acid ◽  
Aerobic Oxidation ◽  
Functional Materials ◽  
Deposition Efficiency ◽  
Acid Modification ◽  
Au Nps ◽  
Size Growth ◽  
Controlled Preparation ◽  
Hydroxy Groups

<p>Cellulose-based functional materials have gained immense interest due to its low density, hydrophilicity, chirality, and degradability. So far, a facile and scalable preparation of fibrillated cellulose by treating the hydroxy groups of cellulose with citric acid (F-CAC) have been developed, and applied as a reinforcing filler for polypropylene composite. Herein, a size-selective preparation of Au nanoparticles (NPs) stabilized by F-CAC is described. By modifying the conditions of trans-deposition method, established in our group previously, a transfer of Au NPs from poly(<i>N</i>-vinyl-2-pyrrolidone) (PVP) to F-CAC proceeded up to 96% transfer efficiency with retaining its cluster sizes in EtOH. Meanwhile, the deposition efficiency drastically decreased in the case of non-modified cellulose, showing the significance of citric acid-modification. A shift of binding energy at Au 4f core level X-ray photoelectron microscopy (XPS) from 82.0 eV to 83.3 eV indicated that the NPs were stabilized on a F-CAC surface rather than by PVP matrix. The reproducible particle size growth was observed when 2-propanol was used as a solvent instead of EtOH, expanding the range of the available particle size with simple manipulation. The thus-obtained Au:F-CAC nanocatalysts exhibited a catalytic activity toward an aerobic oxidation of 1-indonol in toluene to yield 1-indanone quantitatively, and were recyclable at least 6 times, illustrating high tolerance against organic solvents.</p>

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

scholarly journals Modified iron phosphate/polyvinyl alcohol composite film for controlled-release fertilisers

RSC Advances ◽  
2018 ◽  
Vol 8 (32) ◽  
pp. 18146-18152 ◽  
Author(s):  
Yi Zhang ◽  
Zhifeng Yi ◽  
Lianmei Wei ◽  
Lingxue Kong ◽  
Lijun Wang
Keyword(s):  
Citric Acid ◽  
Controlled Release ◽  
Polyvinyl Alcohol ◽  
Composite Film ◽  
Iron Phosphate ◽  
Ferric Phosphate ◽  
Polyvinyl Alcohol Films

A new concept of citric acid-stimulus P fertiliser via incorporation of ferric phosphate as P source in polyvinyl alcohol films.

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.

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

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.

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