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

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.

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Design and Characterization of Sodium Alginate and Poly(vinyl) Alcohol Hydrogels for Enhanced Skin Delivery of Quercetin

Pharmaceutics ◽

10.3390/pharmaceutics12121149 ◽

2020 ◽

Vol 12 (12) ◽

pp. 1149

Author(s):

Ludovico Esposito ◽

Ana Isabel Barbosa ◽

Tânia Moniz ◽

Sofia Costa Lima ◽

Paulo Costa ◽

...

Keyword(s):

Antioxidant Activity ◽

Sodium Alginate ◽

Vinyl Alcohol ◽

Fruits And Vegetables ◽

Radical Scavenging ◽

Entrapment Efficiency ◽

Interesting Property ◽

Poly Vinyl Alcohol ◽

Skin Delivery ◽

Potential Applications

Nature has led to the discovery of biopolymers with noteworthy pharmaceutical applications. Blended biopolymers have demonstrated promising characteristics when compared with their individual counterparts. Sodium alginate (SA) is a marine polymer that has demonstrated the ability to form hydrogels, an interesting property for the development of cutaneous formulations. Predicting the good performance of blended biopolymers, a novel series of hybrid hydrogels based on SA and poly(vinyl) alcohol (PVA) were prepared. Quercetin, a natural polyphenolic flavonoid commonly found in fruits and vegetables, is widely known for its strong anti-inflammatory and antioxidant activity, thus with potential applications against melanoma, dermatitis, psoriasis, and skin ageing. Here, hydrogels were produced at different ratios of SA and PVA. The surface morphology, structure, interaction of polymers, the capacity to absorb water and the entrapment efficiency of quercetin were evaluated for the blended hydrogels. Targeting the cutaneous application of the formulations, the rheological properties of all unloaded and quercetin-loaded hydrogels revealed pseudoplastic behavior, evidence of non-thixotropy, good resistance to deformation, and profile maintenance with temperatures ranging from 20 °C up to 40 °C. The incorporation of quercetin in the hydrogel retained its antioxidant activity, confirmed by radical scavenging assays (ABTS and DPPH). The permeability of quercetin through the skin showed different penetration/permeation profiles according to the hydrogel’s blend. This behavior will allow the selection of SA-PVA at 2/1 ratio for a local and prolonged skin effect, making the use of these hydrogels a good solution to consider for the treatment of skin ageing and inflammation.

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Design and performance of a poly(vinyl alcohol)/silk fibroin enzymatically crosslinked semi-interpenetrating hydrogel for a potential hydrophobic drug delivery

RSC Advances ◽

10.1039/c9ra09344c ◽

2019 ◽

Vol 9 (70) ◽

pp. 41074-41082 ◽

Cited By ~ 3

Author(s):

Chunqing Niu ◽

Xiang Li ◽

Yiyu Wang ◽

Xinyu Liu ◽

Jian Shi ◽

...

Keyword(s):

Drug Delivery ◽

Sustained Release ◽

Pore Structure ◽

Silk Fibroin ◽

Vinyl Alcohol ◽

Poly Vinyl Alcohol ◽

Hydrophobic Drug ◽

Potential Applications ◽

And Performance

Enzymatically cross-linked PVA/SF semi-IPN hydrogels with tunable pore structure have potential applications in sustained release of hydrophobic drug.

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Characterization and potential applications of gamma irradiated chitosan and its blends with poly(vinyl alcohol)

International Journal of Biological Macromolecules ◽

10.1016/j.ijbiomac.2014.01.015 ◽

2014 ◽

Vol 65 ◽

pp. 81-88 ◽

Cited By ~ 27

Author(s):

Ijaz Bano ◽

Muhammad Afzal Ghauri ◽

Tariq Yasin ◽

Qingrong Huang ◽

Annie D'Souza Palaparthi

Keyword(s):

Vinyl Alcohol ◽

Poly Vinyl Alcohol ◽

Potential Applications ◽

Gamma Irradiated

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Effect of vanillin on the miscibility of poly(vinyl alcohol)/gelatin composite hydrogel: Physical and chemical properties

Journal of Applied Polymer Science ◽

10.1002/app.32285 ◽

2010 ◽

pp. n/a-n/a

Author(s):

Lin Cheng ◽

Yi Zuo ◽

Qin Zou ◽

Junfeng Li ◽

Huanan Wang ◽

...

Keyword(s):

Vinyl Alcohol ◽

Chemical Properties ◽

Composite Hydrogel ◽

Poly Vinyl Alcohol ◽

Physical And Chemical Properties ◽

Physical And Chemical ◽

And Chemical Properties

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Enhanced Mechanical and Antibacterial Properties of Nanocomposites Based on Poly(vinyl Alcohol) and Biopolymer-Derived Reduced Graphene Oxide

Polymers ◽

10.3390/polym13040615 ◽

2021 ◽

Vol 13 (4) ◽

pp. 615

Author(s):

Beom-Gon Cho ◽

Shalik Ram Joshi ◽

Seongjin Lee ◽

Shin-Kwan Kim ◽

Young-Bin Park ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Vinyl Alcohol ◽

Bacterial Colonization ◽

Low Cost ◽

Critical Concentration ◽

Antibacterial Properties ◽

Single Step ◽

Poly Vinyl Alcohol ◽

Reduced Graphene

Functionalized graphene–polymer nanocomposites have gained significant attention for their enhanced mechanical, thermal, and antibacterial properties, but the requirement of multi-step processes or hazardous reducing agents to functionalize graphene limits their current applications. Here, we present a single-step synthesis of thermally reduced graphene oxide (TrGO) based on shellac, which is a low-cost biopolymer that can be employed to produce poly(vinyl alcohol) (PVA)/TrGO nanocomposites (PVA–TrGO). The concentration of TrGO varied from 0.1 to 2.0 wt.%, and the critical concentration of homogeneous TrGO dispersion was observed to be 1.5 wt.%, below which strong interfacial molecular interactions between the TrGO and the PVA matrix resulted in improved thermal and mechanical properties. At 1.5 wt.% filler loading, the tensile strength and modulus of the PVA–TrGO nanocomposite were increased by 98.7% and 97.4%, respectively, while the storage modulus was increased by 69%. Furthermore, the nanocomposite was 96% more effective in preventing bacterial colonization relative to the neat PVA matrix. The present findings indicate that TrGO can be considered a promising material for potential applications in biomedical devices.

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Innovations in Poly(Vinyl Alcohol) Derived Nanomaterials

Advances in Materials Science ◽

10.2478/adms-2020-0013 ◽

2020 ◽

Vol 20 (3) ◽

pp. 5-22

Author(s):

A. Kausar

Keyword(s):

Vinyl Alcohol ◽

Low Cost ◽

Metal Nanoparticle ◽

Poly Vinyl Alcohol ◽

Thermoplastic Polymer ◽

Research Fields ◽

Mechanical And Electrical Properties ◽

Heat Stable ◽

Challenges And Opportunities ◽

Potential Applications

AbstractPoly(vinyl alcohol) (PVA) has been considered as an important commercial synthetic thermoplastic polymer. PVA is a low cost, reasonably processable, optically transmitting, heat stable, and mechanically robust plastic. PVA-based nanomaterials usually comprise of the nanocomposites (PVA/graphene, PVA/carbon nanotube, PVA/nanodiamond, PVA/metal nanoparticle) and nanofibers. The structural, optical, mechanical, and electrical properties of the PVA-based nanomaterials have been enhanced with nanofiller addition or nanostructuring. This review offers fundamentals and advanced aspects of poly(vinyl alcohol) and the derived nanomaterials. It highlights recent advances in PVA nanocomposites and nanofibers for potential applications. The PVA-based nanomaterials have been successfully employed in fuel cells, sensors, batteries, membranes, electronics, and drug delivery relevances. The challenges and opportunities to strengthen the research fields of PVA-based nanomaterials have also been presented.

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Radiation Synthesis and Characterization of Poly(Vinyl Alcohol)/ Acrylamide/ TiO2/ SiO2 Nanocomposite for Removal of Metal Ion and Dye From Waste Water

10.21203/rs.3.rs-346264/v1 ◽

2021 ◽

Author(s):

Ahmed Elbarbary ◽

Yasser H. Gad

Keyword(s):

Adsorption Capacity ◽

Vinyl Alcohol ◽

Metal Ion ◽

Chemical Properties ◽

Poly Vinyl Alcohol ◽

Blue Dye ◽

High Adsorption ◽

Γ Irradiation ◽

Experimental Conditions ◽

High Adsorption Capacity

Abstract An effective and novel adsorbent of poly(vinyl alcohol)/polyacrylamide/TiO2/SiO2 (PVA-co-AAm/TiO2/SiO2) nanocomposite synthesized by γ-irradiation polymerization of PVA and AAm in presence of TiO2/SiO2 nanoparticles at different irradiation doses (10, 30 and 50 kGy) for removal of Cu(II) ions and basic blue 3 dye from their aqueous solutions. FT-IR, TEM, XRD, SEM, EDS and DLS analyzed the chemical properties of nanocomposites. The nanocomposite prepared at 30 kGy (PVA-co-AAm/TiO2/SiO2-30) shows high swelling of 197.7 (%) and gelation of 93.1 %. The adsorption capacity (mg/g) and removal (%) of basic blue 3 dye and Cu(II) ions onto nanocomposites by varying experimental conditions were investigated. The PVA-co-AAm/TiO2/SiO2-30 showed high adsorption capacity 3 folds rather than PVA-co-AAm. The equilibrium adsorption for basic blue 3 dye and Cu(II) was 123.9 mg/g and 190.3 mg/g with removal of 82.6 and 95.1 %, respectively. The results of the adsorption of dye or metal ions follow the Pseudo-second order adsorption kinetic, fit with the Langmuir isotherm and the adsorption process is endothermic and spontaneous in nature. The results revealed that the PVA-co-AAm/TiO2/SiO2 nanocomposites could be employed as an effectual adsorbent for adsorption of basic blue dye and Cu(II) ions from wastewater with high adsorption capacity and recovery.

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Fabrication and electro chemical properties of poly vinyl alcohol/para toluene sulfonic acid membranes for the applications of DMFC

Solid State Ionics ◽

10.1016/j.ssi.2008.12.018 ◽

2009 ◽

Vol 180 (2-3) ◽

pp. 282-287 ◽

Cited By ~ 30

Author(s):

G. Gnana Kumar ◽

Periyayya Uthirakumar ◽

Kee Suk Nahm ◽

R. Nimma Elizabeth

Keyword(s):

Vinyl Alcohol ◽

Sulfonic Acid ◽

Chemical Properties ◽

Poly Vinyl Alcohol ◽

Toluene Sulfonic Acid

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New Poly(β-Cyclodextrin)/Poly(Vinyl Alcohol) Electrospun Sub-Micrometric Fibers and Their Potential Application for Wastewater Treatments

Nanomaterials ◽

10.3390/nano10030482 ◽

2020 ◽

Vol 10 (3) ◽

pp. 482 ◽

Cited By ~ 2

Author(s):

Anastasia Anceschi ◽

Fabrizio Caldera ◽

Moira Bertasa ◽

Claudio Cecone ◽

Francesco Trotta ◽

...

Keyword(s):

Metal Ions ◽

Vinyl Alcohol ◽

Inductively Coupled Plasma ◽

Metal Ion ◽

Chemical Properties ◽

Optical Emission ◽

Water Soluble ◽

Poly Vinyl Alcohol ◽

Fiber Morphology ◽

Scanning Calorimetry

Cyclodextrin (CD)-based polymers are known to efficiently form molecular inclusion complexes with various organic and inorganic guest compounds. In addition, they also have a great potential as metal complexes because deprotonated hydroxyls can strongly bind metal ions under alkaline conditions. The range of environmental conditions for polycyclodextrin/metal ion complexation can be extended by the polymerization of CDs with polyacids. This article describes the preparation and characterization of a new type of poly(β-cyclodextrin) (Poly-βCD) sub-micrometric fibers and explores their potential as metal ion sorbents. A water-soluble hyper-branched β-cyclodextrin polymer was blended with poly(vinyl alcohol) (PVA) and here used to improve the mechanical and morphological features of the fibers. Solutions with a different Poly-βCD/PVA ratio were electrospun, and the fibers were cross-linked by a post-spinning thermal treatment at 160 °C to ensure non-solubility in water. The fiber morphology was analyzed by scanning electron microscopy (SEM) before and after the curing process, and physical-chemical properties were studied by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The capability of the insoluble cyclodextrin-based fibers to remove heavy metals from wastewaters was investigated by testing the adsorption of Cu2+ and Cd2+ using inductively coupled plasma-optical emission spectroscopy (ICP-OES). The results suggest that the poly(β-cyclodextrin)/poly(vinyl alcohol) sub-micrometric fibers can complex metal ions and are especially effective Cu2+ sorbents, thus opening new perspectives to the development of fibers and membranes capable of removing both metal ions and organic pollutants.

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