Phosphate barrier on pore-filled cation-exchange membrane for blocking complexing ions in presence of non-complexing ions

Chavan, Vivek; Agarwal, Chhavi; Shinde, Rakesh N.

doi:10.1016/j.apsusc.2018.02.240

Cited by 4 publications

(1 citation statement)

References 38 publications

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“…The selection of this mono-acidic phosphate monomer was based on: (i) the lower acidity of the phosphoric acid groups when compared e.g., to sulfonic acid groups, which expectedly translates into membranes with higher thermal-oxidative stability [21,29]; (ii) the bifunctionality of the monomer that precludes the use of a cross-linker to efficiently retain the polyelectrolyte inside the BC network; and (iii) its demonstrated potential for application as polymeric cation-exchange monoliths for capillary liquid chromatography [30] and cation exchange membranes for blocking complexing ions in presence of non-complexing ions [31].…”

Section: Resultsmentioning

confidence: 99%

Poly(bis[2-(methacryloyloxy)ethyl] phosphate)/Bacterial Cellulose Nanocomposites: Preparation, Characterization and Application as Polymer Electrolyte Membranes

et al. 2018

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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 • 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 • 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.

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