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Title: Nanocomposite membranes prepared from sulfonated polyether ether ketone (SPEEK) and nanoclays for enhancement of fuel cell properties
Authors: Kumar, Vikas
Arthanareeswaran, G.
Ismail, A.F.
Jaafar, Juhana
Das, Diganta Bhusan
Keywords: Sulfonated polyether ether ketone
Nanocomposite membrane
Proton conductivity
Fuel cell
Issue Date: 2017
Publisher: © Hydrogen Energy Publications. Published by Elsevier
Citation: KUMAR, V. ...et al., 2017. Nanocomposite membranes prepared from sulfonated polyether ether ketone (SPEEK) and nanoclays for enhancement of fuel cell properties. International Journal of Hydrogen Energy, In Press.
Abstract: Sulfonated polyether ether ketone (SPEEK) polymer nanocomposite membranes were fabricated by incorporating nanoclays (e.g., cloisite 30B) and bentonite into the SPEEK polymer matrix. The SPEEK, SPEEK/cloisite, SPEEK/bentonite and SPEEK/cloisite/bentonite nanocomposite membranes were prepared by using solution intercalation method where the thickness of the membranes was approximately 100 µm. The membranes were characterized by FTIR, SEM, H1 NMR and TGA/DSC to investigate the influence of thermal and physical properties of SPEEK polymer membranes with the adding of nanoclays into SPEEK polymer matrix. The sulfonation of PEEK was confirmed by Fourier transform infrared spectroscopy (FTIR) and the degree of sulfonation of PEEK was determined by H1 NMR spectroscopy. The modified membrane (SPEEK/cloisite/bentonite) showed 2.1% reduced percent water uptake compared to the pristine SPEEK membrane and it showed enhanced thermal strength. Improved glass transition temperature of 7°C was observed for the modified membrane. The presence of nanoclays into the modified SPEEK polymer membranes was confirmed by scanning electron microscopy (SEM) and TGA/DSC. The performance of the membranes was determined by their water uptake capacity, methanol permeability and proton conductivity. The maximum proton conductivity showed by the SPEEK/cloisite membrane at 80°C and fully hydrated condition was 3.0549 x 10-3 S cm-1. The SPEEK/cloisite/bentonite nanocomposite membranes showed reduced proton conductivity; however, they also predicted a 6.14% reduction in methanol permeability as compared to pristine SPEEK membrane, hereby, suggesting that the modified membrane is acceptable for direct methanol fuel cell.
Description: This paper is in closed access until 17th July 2018.
Sponsor: The authors Dr. G. Arthanareeswaran and Diganta B. Das are thankful to Royal Academy of Engineering, UK for financial support under Newton-Bhaba Higher Education Initiative (Grant Number: HEP151642).
Version: Accepted for publication
DOI: 10.1016/j.ijhydene.2017.06.128
URI: https://dspace.lboro.ac.uk/2134/25982
Publisher Link: http://dx.doi.org/10.1016/j.ijhydene.2017.06.128
ISSN: 0360-3199
Appears in Collections:Closed Access (Chemical Engineering)

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