Enhanced performance of poly(ether sulfone) based composite proton exchange membranes with sulfonated polymer brush functionalized graphene oxide

Abstract

Novel poly(ether sulfone) based composite proton exchange membranes with enhanced performance were prepared by incorporating sulfonated polymer brush functionalized GO.

Development of self-assembling sulfonated graphene oxide membranes as a potential proton conductor

“…Among the most recent research trends, graphene oxide (GO) has gained significant interest for the production of both selfstanding [16,17,19,22,23] and hybrid electrolytes, which have been mostly tested for intermediate (80-130 °C) temperature applications. The latter may still be based on Nafion ® [24][25][26][27][28][29] or on more thermally stable polymers, such as sulfonated polyimide [30][31][32] and sulfonated poly(ether sulfones/ketones) [33][34][35][36][37][38], in which the addition of either virgin or functionalized GO is expected to improve mechanical, water-retaining and proton-conducting behaviors.…”

“…Therefore, innovative approaches involving the modification of GO flakes with alternative functionalities may be studied, with the aim of enhancing both ionic conductivity and structural cohesion of the material. A particularly interesting route consists in the introduction of some acid moieties more tightly bound to the skeleton of GO, such as sulfonic acid ones (-SO3H) analogous to those of Nafion ® , as proposed by several authors [16,[22][23][24][25][31][32][33][34]. Self-standing sulfonated graphene oxide membranes have been prepared by Kumar et al [16].…”

Sulfonated poly(ether sulfone) based sulfonated molybdenum sulfide composite membranes: proton transport properties and direct methanol fuel cell performance

“…36 The third and major weight loss after 500 1C is associated with the decomposition of the sPES main chain. 49 The s-MoS 2 /sPES composite membranes show lower weight loss at similar temperatures compared to the sPES membrane, which could be attributed to strong intermolecular hydrogen bonding interactions and even distribution of s-MoS 2 particles within the sPES matrix. 36 The result shows that composite membranes were thermally stable up to 250 1C which is adequate for their use as polymer electrolyte membranes.…”

Fabrication of Binary Sulfonated Poly Ether Sulfone and Sulfonated Polyvinylidene Fluoride‐Co‐Hexafluoro Propylene Blend Membrane as Efficient Electrolyte for Proton Exchange Membrane Fuel Cells

“…17 Particularly, SPES with high DS exhibits high proton conductivity, however, is not adequately stable mechanically and thermally when use in PEMFC. 19,20 Among above-mentioned strategies, blending of a reasonable amount of hydrophobic polymer has been demonstrated to result in excellent properties such as less swelling, high oxidative stability and high mechanical modulus. 18 Thus, remarkable efforts are being devoted to designing blend PEMs with reasonable ionic conductivity and mechanical modulus and thermal stability.…”

“…Thus, remarkable efforts are being devoted to designing blend PEMs with reasonable ionic conductivity and mechanical modulus and thermal stability. The most promising strategy is incorporation of graphene oxide based fillers or blending of high viscous polymers or cross‐linking the polymer chains, for which we can not only gain reorganized ion conducting channels of SPES but also boost the electrochemical and thermomechanical properties to a higher extent through hybrid effects . Among above‐mentioned strategies, blending of a reasonable amount of hydrophobic polymer has been demonstrated to result in excellent properties such as less swelling, high oxidative stability and high mechanical modulus.…”