scholarly journals New crosslinked cast films based on poly(vinyl alcohol): Preparation and physico-chemical properties

2014 ◽  
Vol 8 (12) ◽  
pp. 941-952 ◽  
Author(s):  
C. Birck ◽  
S. Degoutin ◽  
N. Tabary ◽  
V. Miri ◽  
M. Bacquet
Keyword(s):  
Vinyl Alcohol ◽  
Chemical Properties ◽  
Poly Vinyl Alcohol ◽  
Cast Films ◽  
Physico Chemical

scholarly journals Novel cross-linked poly(vinyl alcohol)-based electrolyte membranes for fuel cell applications

RSC Advances ◽  
2020 ◽  
Vol 10 (44) ◽  
pp. 26521-26527 ◽  
Author(s):  
Poonkuzhali Kulasekaran ◽  
Berlina Maria Mahimai ◽  
Paradesi Deivanayagam
Keyword(s):  
Fuel Cell ◽  
Vinyl Alcohol ◽  
Chemical Properties ◽  
Poly Vinyl Alcohol ◽  
Promising Candidate ◽  
Physico Chemical ◽  
Blend Membranes ◽  
Electrolyte Membranes ◽  
Sulfonated Poly

A series of cross-linked poly(vinyl alcohol)-sulfonated poly(ether sulfone) blend membranes were prepared. The studies of physico-chemical properties revealed that the reported membranes are promising candidate for PEMFC applications.

scholarly journals Collation Efficiency of Poly(Vinyl Alcohol) and Alginate Membranes with Iron-Based Magnetic Organic/Inorganic Fillers in Pervaporative Dehydration of Ethanol

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4152
Author(s):  
Gabriela Dudek ◽  
Roman Turczyn ◽  
David Djurado
Keyword(s):  
Separation Factor ◽  
Vinyl Alcohol ◽  
Chemical Properties ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration ◽  
Iron Particles ◽  
Physico Chemical ◽  
Iron Based ◽  
Inorganic Fillers ◽  
Best Parameters

Hybrid poly(vinyl alcohol) and alginate membranes were investigated in the process of ethanol dehydration by pervaporation. As a filler, three types of particles containing iron element, i.e., hematite, magnetite, and iron(III) acetyloacetonate were used. The parameters describing transport properties and effectiveness of investigated membranes were evaluated. Additionally, the physico-chemical properties of the resulting membranes were studied. The influence of polymer matrix, choice of iron particles and their content in terms of effectiveness of membranes in the process of ethanol dehydration were considered. The results showed that hybrid alginate membranes were characterized by a better separation factor, while poly(vinyl alcohol) membranes by a better flux. The best parameters were obtained for membranes filled with 7 wt% of iron(III) acetyloacetonate. The separation factor and pervaporative separation index were equal to 19.69 and 15,998 g⋅m−2⋅h−1 for alginate membrane and 11.75 and 14,878 g⋅m−2⋅h−1 for poly(vinyl alcohol) membrane, respectively.

scholarly journals Composite Poly(vinyl alcohol)-Based Nanofibers Embedding Differently-Shaped Gold Nanoparticles: Preparation and Characterization

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1604
Author(s):  
Andrea Dodero ◽  
Maila Castellano ◽  
Paola Lova ◽  
Massimo Ottonelli ◽  
Elisabetta Brunengo ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Ad Hoc ◽  
Chemical Reduction ◽  
Chemical Properties ◽  
Single Step ◽  
Gold Nanostructures ◽  
Poly Vinyl Alcohol ◽  
Spherical Nanoparticles ◽  
Potential Applications ◽  
New Perspective

Poly(vinyl alcohol) nanofibrous mats containing ad hoc synthesized gold nanostructures were prepared via a single-step electrospinning procedure and investigated as a novel composite platform with several potential applications. Specifically, the effect of differently shaped and sized gold nanostructures on the resulting mat physical-chemical properties was investigated. In detail, nearly spherical nanoparticles and nanorods were first synthesized through a chemical reduction of gold precursors in water by using (hexadecyl)trimethylammonium bromide as the stabilizing agent. These nanostructures were then dispersed in poly(vinyl alcohol) aqueous solutions to prepare nanofibrous mats, which were then stabilized via a humble thermal treatment able to enhance their thermal stability and water resistance. Remarkably, the nanostructure type was proven to influence the mesh morphology, with the small spherical nanoparticles and the large nanorods leading to thinner well defined or bigger defect-rich nanofibers, respectively. Finally, the good mechanical properties shown by the prepared composite mats suggest their ease of handleability thereby opening new perspective applications.

scholarly journals Physico-chemical characteristics of gamma irradiation crosslinked poly(vinyl alcohol)/magnetite ferrogel composite

2014 ◽  
Vol 68 (6) ◽  
pp. 743-753 ◽  
Author(s):  
Milena Marinovic-Cincovic ◽  
Aleksandra Radosavljevic ◽  
Jelena Krstic ◽  
Jelena Spasojevic ◽  
Natasa Bibic ◽  
...  
Keyword(s):  
Gamma Irradiation ◽  
Vinyl Alcohol ◽  
Magnetic Particles ◽  
Heating Temperature ◽  
Crosslinking Agent ◽  
Poly Vinyl Alcohol ◽  
Chemical Characteristics ◽  
Physico Chemical ◽  
Soft Actuators ◽  
Pva Hydrogel

Magnetic field sensitive gels, ferrogels are new promising class of hydrogels. The coupling of hydrogels and magnetic particles has potential application in soft actuators such as artificial muscles or for hyperthermia application. Here a composite of magnetite particles (Fe3O4) and poly(vinyl alcohol) (PVA) hydrogel is developed using gamma irradiation as a crosslinking agent. PVA and Fe3O4 were chosen because of their well-established biocompatibility, radiation crosslinking potential (PVA), mild magnetic properties and the Curie point near desired heating temperature range (Fe3O4). Physico-chemical characteristics of these systems show the effect of the presence of particles in the process of radiation-induced crosslinking. Obtained PVA/Fe3O4 ferrogel composite has greater swelling capacity, activation energy of dehydration and dehydration rate compared to PVA hydrogel, crosslinked under the same conditions.

scholarly journals Preparation and of PVA-based compositions with embedded silver, copper and zinc oxide nanoparticles and assessment of their antibacterial properties

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Jolanta Pulit-Prociak ◽  
Anita Staroń ◽  
Paweł Staroń ◽  
Anna Chmielowiec-Korzeniowska ◽  
Agata Drabik ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Metallic Nanoparticles ◽  
Antibacterial Properties ◽  
Chemical Properties ◽  
Microscopic Analysis ◽  
Poly Vinyl Alcohol ◽  
Physico Chemical ◽  
Dynamic Light Scattering Technique ◽  
Ft Ir ◽  
Bacterial Film

Abstract A series of poly(vinyl alcohol) (PVA) based liquid compositions with addition of zinc oxide, silver and copper nanoparticles has been prepared. The compositions also contained other consistency-forming organic components. The physico-chemical properties of the products have been determined. Their pH and density have been assessed. Also, the size of nanoparticles has been defined with using a dynamic light scattering technique. The compositions were subjected to XRD, FT-IR and microscopic analysis as well. Thanks to the incorporation of both metal oxide and metallic nanoparticles, it was possible to enrich the products with antibacterial properties. Their inhibiting properties in the growth of microorganisms have been confirmed against both Gram-negative and Gram-positive strains such as E. coli, S. aureus and P. aeruginosa. Thanks to the ability for solidification, the compositions may be applied on a bacterially contaminated surface, and after destroying the microorganisms and its solidification, it may be peeled off along with the dead bacterial film.

Physico-chemical studies of chitosan-poly(vinyl alcohol) blends plasticized with sorbitol and sucrose

1997 ◽  
Vol 34 (1-2) ◽  
pp. 9-19 ◽  
Author(s):  
Ioannis Arvanitoyannis ◽  
Ioannis Kolokuris ◽  
Atsuyoshi Nakayama ◽  
Noboru Yamamoto ◽  
Sei-ichi Aiba
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Physico Chemical ◽  
Chemical Studies

Physico-Chemical, Mechanical and Morphological Properties of Biodegradable Films Based on Arrowroot Starch and Poly(vinyl alcohol)

2021 ◽  
pp. 1-24
Author(s):  
José Augusto de Almeida Nascimento ◽  
Amanda Félix dos Santos ◽  
Ivo Diego Lima Silva ◽  
Eduardo Henrique Lago Falcão ◽  
Douglas de Britto ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Morphological Properties ◽  
Poly Vinyl Alcohol ◽  
Biodegradable Films ◽  
Physico Chemical ◽  
Arrowroot Starch
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