Poly(bis[2-(methacryloyloxy)ethyl]phosphate)/Bacterial Cellulose Nanocomposites: Preparation, Characterization and Application as Polymer Electrolyte Membranes
authors Vilela, C; Martins, APC; Sousa, N; Silvestre, AJD; Figueiredo, FML; Freire, CSR
nationality International
journal APPLIED SCIENCES-BASEL
author keywords bacterial cellulose; proton exchange membrane; nanocomposites; poly(bis[2-(methacryloyloxy)ethyl]phosphate); protonic conductivity
keywords BACTERIAL CELLULOSE; PROTONIC CONDUCTIVITY; FUEL-CELLS; COMPOSITE MEMBRANES; EXCHANGE MEMBRANES; NANOCELLULOSE; ACID; TEMPERATURE; NAFION(R); MODULUS
abstract Recent studies have demonstrated the potential of bacterial cellulose (BC) as a substrate for the design of bio-based ion exchange membranes with an excellent combination of conductive and mechanical properties for application in devices entailing functional ion conducting elements. In this context, the present study aims at fabricating polyelectrolyte nanocomposite membranes based on poly(bis[2-(methacryloyloxy)ethyl]phosphate) [P(bisMEP)] and BC via the in-situ free radical polymerization of bis[2-(methacryloyloxy)ethyl]phosphate (bisMEP) inside the BC three-dimensional network under eco-friendly reaction conditions. The resulting polyelectrolyte nanocomposites exhibit thermal stability up to 200 degrees C, good mechanical performance (Young's modulus > 2 GPa), water-uptake ability (79-155%) and ion exchange capacity ([H+] = 1.1-3.0 mmol g(-1)). Furthermore, a maximum protonic conductivity of ca. 0.03 S cm(-1) was observed for the membrane with P(bisMEP)/BC of 1: 1 in weight, at 80 degrees C and 98% relative humidity. The use of a bifunctional monomer that obviates the need of using a cross-linker to retain the polyelectrolyte inside the BC network is the main contribution of this study, thus opening alternative routes for the development of bio-based polyelectrolyte membranes for application in e.g., fuel cells and other devices based on proton separators.
publisher MDPI
issn 2076-3417
year published 2018
volume 8
issue 7
digital object identifier (doi) 10.3390/app8071145
web of science category Chemistry, Multidisciplinary; Materials Science, Multidisciplinary; Physics, Applied
subject category Chemistry; Materials Science; Physics
unique article identifier WOS:000441814300135

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