Poly(Vinyl Alcohol) Enhances Acetylation of Ascorbic Acid in Superparamagnetic Graphene Oxide Nanoparticles Ultrasonically Complexed with Acetylsalicylic Acid

2020 ◽  
Vol 2 (8) ◽  
pp. 3663-3673
Author(s):  
Anastasia Tkach ◽  
Uladzimir Fiadosenka ◽  
Aliaksandr Burko ◽  
Hanna Bandarenka ◽  
Anna Matsukovich ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Acetylsalicylic Acid ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Oxide Nanoparticles

scholarly journals Graphene Based Poly(Vinyl Alcohol) Nanocomposites Prepared by In Situ Green Reduction of Graphene Oxide by Ascorbic Acid: Influence of Graphene Content and Glycerol Plasticizer on Properties

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1013 ◽  
Author(s):  
Mónica Cobos ◽  
M. Fernández ◽  
M. Fernández
Keyword(s):  
Ascorbic Acid ◽  
Graphene Oxide ◽  
Water Absorption ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Ex Situ ◽  
Poly Vinyl Alcohol ◽  
Vapor Permeability ◽  
Water Barrier

The enhanced properties of polymer nanocomposites as compared with pure polymers are only achieved in the presence of well-dispersed nanofillers and strong interfacial adhesion. In this study, we report the preparation of nanocomposite films based on poly(vinyl alcohol) (PVA) filled with well dispersed graphene sheets (GS) by in situ reduction of graphene oxide (GO) dispersed in PVA solution using ascorbic acid (L-AA) as environmentally friendly reductant. The combined effect of GS content and glycerol as plasticizer on the structure, thermal, mechanical, water absorption, and water barrier properties of PVA/GS nanocomposite films is studied for the first time. Higher glass transition temperature, lower crystallinity, melting, and crystallization temperature, higher mechanical properties, and remarkable improvement in the thermal stability compared to neat PVA are obtained as a result of strong interfacial interactions between GS and PVA by hydrogen bonding. PVA/GS composite film prepared by ex situ process is more brittle than its in situ prepared counterpart. The presence of GS improves the water barrier and water resistance properties of nanocomposite films by decreasing water vapor permeability and water absorption of PVA. This work demonstrates that the tailoring of PVA/GS nanocomposite properties is enabled by controlling GS and glycerol content. The new developed materials, particularly those containing plasticizer, could be potential carriers for transdermal drug delivery.

Influence of the polymer molecular weights on the electrical properties of Poly(vinyl alcohol) – Poly(ethylene glycols)/Graphene oxide nanocomposites

2021 ◽  
Author(s):  
Shurooq S. Al-Abbas ◽  
Rusul A. Ghazi ◽  
Athmar K. Al-shammari ◽  
Nisreen R. Aldulaimi ◽  
Ali R. Abdulridha ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrical Properties ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Molecular Weights ◽  
Ethylene Glycols ◽  
Poly Ethylene

scholarly journals Modulation of Viscoelastic and Absorption Properties of Poly(vinyl alcohol)-graphene Oxide Composites

2021 ◽  
Author(s):  
Yu Lei ◽  
Imane Boucenna ◽  
Véronique Thévenet ◽  
Diana Dragoe ◽  
Alain Ponton
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Absorption Properties ◽  
Oxide Composites

High barrier graphene oxide nanosheet/poly(vinyl alcohol) nanocomposite films

2012 ◽  
Vol 409-410 ◽  
pp. 156-163 ◽  
Author(s):  
Hua-Dong Huang ◽  
Peng-Gang Ren ◽  
Jun Chen ◽  
Wei-Qin Zhang ◽  
Xu Ji ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Graphene Oxide Nanosheet

A novel poly (vinyl alcohol)-aided ZnO/Fe2O3 nanocomposite as an ascorbic acid sensor

2021 ◽  
Vol 32 (6) ◽  
pp. 7778-7790
Author(s):  
Buzuayehu Abebe ◽  
Enyew Amare Zereffa ◽  
H. C. Ananda Murthy ◽  
C. R. Ravikumar
Keyword(s):  
Ascorbic Acid ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ascorbic Acid Sensor

Reinforcing effect of graphene oxide reinforcement on the properties of poly (vinyl alcohol) and carboxymethyl tamarind gum based phase-separated film

2018 ◽  
Vol 81 ◽  
pp. 61-71 ◽  
Author(s):  
Indu Yadav ◽  
Suraj K. Nayak ◽  
V.S. Sharan Rathnam ◽  
Indranil Banerjee ◽  
Sirsendu S. Ray ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Reinforcing Effect

Performance of Sulfonated Poly(Vinyl Alcohol)/Graphene Oxide Polyelectrolytes for Direct Methanol Fuel Cells

2020 ◽  
Vol 8 (7) ◽  
pp. 2000124
Author(s):  
Oscar Gil-Castell ◽  
Óscar Santiago ◽  
Borja Pascual-Jose ◽  
Emilio Navarro ◽  
Teresa J. Leo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Fuel Cells ◽  
Vinyl Alcohol ◽  
Direct Methanol Fuel Cells ◽  
Poly Vinyl Alcohol ◽  
Direct Methanol ◽  
Methanol Fuel Cells ◽  
Sulfonated Poly

scholarly journals Regulation Mechanism of Graphene Oxide on the Structure and Mechanical Properties of Bio-Based Gel-Spun Lignin/Poly (Vinyl Alcohol) Fibers

2021 ◽  
Author(s):  
Yanhong Jin ◽  
Yuanyuan Jing ◽  
Wenxin Hu ◽  
Jiaxian Lin ◽  
Yu Cheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Graphene Oxide ◽  
Young’S Modulus ◽  
Vinyl Alcohol ◽  
Young's Modulus ◽  
Lignin Content ◽  
Poly Vinyl Alcohol ◽  
Regulation Mechanism ◽  
Composite Fibers

Abstract Lignin has been used as a sustainable and eco-friendly filler in composite fibers. However, lignin aggregation occurred at high lignin content, which significantly hindered the further enhancement of fiber performance. The incorporation of graphene oxide (GO) enhanced the mechanical properties of the lignin/poly(vinyl alcohol) (PVA) fibers and affected their structure. With the GO content increasing from 0 to 0.2%, the tensile strength of 5% lignin/PVA fibers increased from 491 MPa to 631 MPa, and Young's modulus increased from 5.91 GPa to 6.61 GPa. GO reinforced 30% lignin/PVA fibers also showed the same trend. The tensile strength increased from 455 MPa to 553 MPa, and Young's modulus increased from 5.39 GPa to 7 GPa. The best mechanical performance was observed in PVA fibers containing 5% lignin and 0.2% GO, which had an average tensile strength of 631 MPa and a Young’s modulus of 6.61 GPa. The toughness values of these fibers are between 9.9-15.6 J/g, and the fibrillar and ductile fracture microstructure were observed. Structure analysis of fibers showed that GO reinforced 5% lignin/PVA fibers had higher crystallinity, and evidence of hydrogen bonding among GO, lignin, and PVA in the gel fibers was revealed. Further, water resistance and swelling behavior of composite PVA fibers were studied to further evidence the structure change of composite fibers.

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