Tuning the Ion Channel Network of Perfluorosulfonated Membranes via a Facile Sacrificial Porogen Approach

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F18%3A43950049" target="_blank" >RIV/49777513:23640/18:43950049 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.memsci.2017.09.079" target="_blank" >http://dx.doi.org/10.1016/j.memsci.2017.09.079</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.memsci.2017.09.079" target="_blank" >10.1016/j.memsci.2017.09.079</a>

Result language

angličtina

Original language name

Tuning the Ion Channel Network of Perfluorosulfonated Membranes via a Facile Sacrificial Porogen Approach

Original language description

The morphology in terms of the ion channel size, apparent porosity and tortuosity of perfluorosulfonate membranes was modified by using sulfonated polystyrene (SPS) as a sacrificial porogen. The precursor polymers were fabricated via solution-casting of the commercially available Nafion solution together with SPS. Upon swelling SPS was leached from the membrane matrix resulting in the formation of larger nanosized ion channels and clusters and hence a more open membrane matrix in fully hydrated conditions. Below a threshold value of 30% SPS, the membranes maintained high permselectivity and the porogen mainly increased the apparent porosity and network interconnectivity resulting in increased hydraulic permeability, streaming potential coefficient and membrane conductivity. Higher porogen contents resulted in larger characteristic hydrophilic domain sizes, quantified from SAXS/WAXS, and enhanced membrane conductivity up to 300% with only a slight decrease in the permselectivity in dilute LiCl solutions. These results together confirm the effective modification of the charged nanoscopic ion network and clearly indicate that SPS can effi ciently be used for precise tuning the PTFE-based membrane matrix to achieve tailored transport properties for specific electrochemical applications.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/LO1402" target="_blank" >LO1402: CENTEM+</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF MEMBRANE SCIENCE

ISSN

0376-7388

e-ISSN

—

Volume of the periodical

545

Issue of the periodical within the volume

JAN 1 2018

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

9

Pages from-to

275-283

UT code for WoS article

000413270200032

EID of the result in the Scopus database

2-s2.0-85030833544