Development of functionalized quantum dot modified poly(vinyl alcohol) membranes for fuel cell applications

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47536-47544 ◽  
Author(s):  
Rajender Singh Malik ◽  
Udit Soni ◽  
Sampat Singh Chauhan ◽  
Pawan Verma ◽  
Veena Choudhary
Keyword(s):  
Fuel Cell ◽  
Quantum Dot ◽  
Proton Conductivity ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Heat Treated

Superior thermally, hydrolytically and mechanically stable heat treated functionalized quantum dot modified PVA membranes with enhanced proton conductivity are reported.

scholarly journals Fabrication and Characterization of Low-Cost Poly(Vinyl Alcohol) Composite Membrane for Low Temperature Fuel Cell Application

2018 ◽  
Vol 22 (1) ◽  
Author(s):  
Ruhilin Nasser ◽  
Siti Khadijah Hubadillah ◽  
Mohd Hafiz Dzarfan Othman ◽  
Arif Akmal Mohamed Hassan
Keyword(s):  
Contact Angle ◽  
Fuel Cell ◽  
Proton Conductivity ◽  
Water Uptake ◽  
Composite Membrane ◽  
Vinyl Alcohol ◽  
Proton Exchange ◽  
High Price ◽  
Poly Vinyl Alcohol ◽  
Weight Percentage

The urge to find alternative sources of energy is crucial as the source of fossil fuel shows a high number of depletion over the year. Compared to other alternatives sources, fuel cell is high at rank as it generates no harmful gases to the surrounding and high in efficiency. The performance of this fuel cell is affected by several factors and one of it is the permeability of proton exchange membrane (PEM). Nafion® is known to be used as the PEM in fuel cells, however due to its high price, polyvinyl alcohol membrane was selected in this study to substitute the Nafion® as it was low in price and excellent in chemical and mechanical strength. Poly (vinyl alcohol) composite membrane was prepared and crosslinked with sulfosuccinic acid (SSA). To further increase the proton conductivity of the membrane, graphene oxide (GO) with 1, 2 and 3 weight percentage was incorporated into the polymer membrane. All the membranes were characterized by using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), water uptake measurement, contact angle, ion exchange capacity and proton conductivity respectively. Synthesized membranes show low water uptake and contact angle as GO loading was increased. IEC value and water swelling were found to be increased with increasing of GO loading. The proton conductivity of the membrane increases as more GO was incorporated into PVA-SSA and achieved its highest conductivity at 0.020746 S cm-1 with 2 wt. % of GO incorporation.

Where do poly(vinyl alcohol) based membranes stand in relation to Nafion® for direct methanol fuel cell applications?

2012 ◽  
Vol 216 ◽  
pp. 48-66 ◽  
Author(s):  
Jatindranath Maiti ◽  
Nitul Kakati ◽  
Seok Hee Lee ◽  
Seung Hyun Jee ◽  
Balasubramanian Viswanathan ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Vinyl Alcohol ◽  
Direct Methanol Fuel Cell ◽  
Poly Vinyl Alcohol ◽  
Direct Methanol ◽  
Methanol Fuel Cell

scholarly journals Electrospinning of Cellulose Nanocrystal-Filled Poly (Vinyl Alcohol) Solutions: Material Property Assessment

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 805 ◽  
Author(s):  
J. Elliott Sanders ◽  
Yousoo Han ◽  
Todd S. Rushing ◽  
Douglas J. Gardner
Keyword(s):  
Vinyl Alcohol ◽  
Fiber Diameter ◽  
Morphological Structure ◽  
Poly Vinyl Alcohol ◽  
Oh Groups ◽  
Heat Treated ◽  
Property Assessment ◽  
Vinyl Group ◽  
Random Composite ◽  
Scanning Electron

Poly (vinyl alcohol) (PVA) and cellulose nanocrystals (CNC) random composite mats were prepared using the electrospinning method. PVA/CNC mats were reinforced with weight concentrations of 0, 20 and 50% CNC (w/w) relative to PVA. Scanning electron microscopy was used to measure the fiber diameter, which ranged from 377 to 416 nm. Thermogravimetric analysis (TGA) confirmed the presence of CNC fibers in the mat fibers which were not visible by scanning electron microscope (SEM). Mechanical testing was conducted using ASTM D 638 on each sample group at 10 mm min−1. Neat PVA and PVA/CNC mats were heat treated at 170 °C for 2h hours, and the morphological structure was maintained with some fiber diameter reduction. Mechanical property results after heat treatment showed a decrease in tensile strength, an increase in tensile stiffness and a decrease in strain to yield (%). This effect was attributable to enhanced diffusion bonding of the mat fiber intersections. The CNC fibers also increased mat stiffness, and reduced strain to yield in non-treated mats. The use of CNCs show potential for compounding into bulk polymer composites as a reinforcement filler, and also show promise for chemical crosslinking attributable to the –OH groups on both the PVA, in addition to esterification of the vinyl group, and CNC.

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