Asymmetric polymer materials: Synthesis, structure, and performance

Hnatchuk, Nataliia; Pawale, Tejal; Li, Xiao

doi:10.1016/j.polymer.2022.124607

Cited by 6 publications

(2 citation statements)

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“…Changing the surface shape of polymer films and its composition affects the functional properties [ 103 , 104 ]. Modification of the surface of PFSA membranes affects the rate of electromembrane processes by enhancing vortex fluxes near the surface [ 105 ] and at the three-phase interface (membrane-catalyst-gas diffusion layer) in the MEA, as well as improving proton transfer and water exchange.…”

Section: Modification Of Pfsa Membranes By Different Treatmentsmentioning

confidence: 99%

“…[98] annealed for 20 h at temperatures from 80 to 220 The dependences of the proton conductivity of membranes on the power of ultrasonic treatment and its duration pass through a maximum at 5.2 W and 10 min. Changing the surface shape of polymer films and its composition affects the functional properties [103,104]. Modification of the surface of PFSA membranes affects the rate of electromembrane processes by enhancing vortex fluxes near the surface [105] and at the three-phase interface (membrane-catalyst-gas diffusion layer) in the MEA, as well as improving proton transfer and water exchange.…”

Section: Modification Of Pfsa Membranes By Different Treatmentsmentioning

confidence: 99%

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Approaches to the Modification of Perfluorosulfonic Acid Membranes

et al. 2023

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Polymer ion-exchange membranes are featured in a variety of modern technologies including separation, concentration and purification of gases and liquids, chemical and electrochemical synthesis, and hydrogen power generation. In addition to transport properties, the strength, elasticity, and chemical stability of such materials are important characteristics for practical applications. Perfluorosulfonic acid (PFSA) membranes are characterized by an optimal combination of these properties. Today, one of the most well-known practical applications of PFSA membranes is the development of fuel cells. Some disadvantages of PFSA membranes, such as low conductivity at low humidity and high temperature limit their application. The approaches to optimization of properties are modification of commercial PFSA membranes and polymers by incorporation of different additive or pretreatment. This review summarizes the approaches to their modification, which will allow the creation of materials with a different set of functional properties, differing in ion transport (first of all proton conductivity) and selectivity, based on commercially available samples. These approaches include the use of different treatment techniques as well as the creation of hybrid materials containing dopant nanoparticles. Modification of the intrapore space of the membrane was shown to be a way of targeting the key functional properties of the membranes.

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Section: Modification Of Pfsa Membranes By Different Treatmentsmentioning

confidence: 99%