Polyelectrolytes based on self-crosslinking latexes and thier use as ion exchange membranes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F17%3AN0000047" target="_blank" >RIV/28676092:_____/17:N0000047 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Polyelectrolytes based on self-crosslinking latexes and thier use as ion exchange membranes

Popis výsledku v původním jazyce

At present, most commercially available ion exchange heterogeneous membranes are made from an ion exchange resin and a polymeric binder, typically polyethylene or polypropylene. The production technology of these membranes, however, requires a demanding instrumentation and leads to the degradation of ion exchange groups due to the increased temperatures and pressures during processing. These disadvantages can be easily eliminated in the case of an unusually technology of producing ion exchange resin heterogeneous membranes based on latex binder, which consists in mixing the latex and the ion exchange resin, casting the mixture into forms, and drying membranes at room temperature. The subject of the thesis was the study of the self-crosslinking styrene-n-butyl acrylate polyelectrolytes as alternative binder materials suitable for preparation of cation exchange homogeneous and heterogeneous membranes. The influence of the chemical composition on the content of acrylic or methacrylic acid was monitored on the electrochemical, separation and physico-mechanical properties of the membranes. Also, in the case of heterogeneous ion exchange membranes, the optimal ratio of the latex and commercial cation exchange resin was sought. It has been shown that the increasing content of acrylic and methacrylic acid has led to a significant increase in the ion exchange capacity of cation exchange homogeneous membranes to the detriment of their dimensional and mechanical stability in water. In the case of cation exchange heterogeneous membranes, it was found that at the commercial cation exchange resin content of 45 and 60 wt%, excellent electrochemical properties have been achieved in terms of ion exchange capacity, areal and specific resistance in almost all types of latex binders. Although the prepared heterogeneous membranes had lower permselectivity and dimensional stability compared to Ralex® commercial membranes, polyelectrolytes based on self-crosslinking latexes appear to be promising connective materials for the technologically unproductive production of ion exchange heterogeneous membranes.

Název v anglickém jazyce

Polyelectrolytes based on self-crosslinking latexes and thier use as ion exchange membranes

Popis výsledku anglicky

At present, most commercially available ion exchange heterogeneous membranes are made from an ion exchange resin and a polymeric binder, typically polyethylene or polypropylene. The production technology of these membranes, however, requires a demanding instrumentation and leads to the degradation of ion exchange groups due to the increased temperatures and pressures during processing. These disadvantages can be easily eliminated in the case of an unusually technology of producing ion exchange resin heterogeneous membranes based on latex binder, which consists in mixing the latex and the ion exchange resin, casting the mixture into forms, and drying membranes at room temperature. The subject of the thesis was the study of the self-crosslinking styrene-n-butyl acrylate polyelectrolytes as alternative binder materials suitable for preparation of cation exchange homogeneous and heterogeneous membranes. The influence of the chemical composition on the content of acrylic or methacrylic acid was monitored on the electrochemical, separation and physico-mechanical properties of the membranes. Also, in the case of heterogeneous ion exchange membranes, the optimal ratio of the latex and commercial cation exchange resin was sought. It has been shown that the increasing content of acrylic and methacrylic acid has led to a significant increase in the ion exchange capacity of cation exchange homogeneous membranes to the detriment of their dimensional and mechanical stability in water. In the case of cation exchange heterogeneous membranes, it was found that at the commercial cation exchange resin content of 45 and 60 wt%, excellent electrochemical properties have been achieved in terms of ion exchange capacity, areal and specific resistance in almost all types of latex binders. Although the prepared heterogeneous membranes had lower permselectivity and dimensional stability compared to Ralex® commercial membranes, polyelectrolytes based on self-crosslinking latexes appear to be promising connective materials for the technologically unproductive production of ion exchange heterogeneous membranes.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/LO1418" target="_blank" >LO1418: Progresivní rozvoj Membránového inovačního centra</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Workshop of Students’ Presentations 2017, Membranes and Membrane Processes

ISBN

978-80-906831-0-5

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

Czech membrane Platform

Místo vydání

Česká Lípa

Místo konání akce

Stráž pod Ralskem

Datum konání akce

18. 10. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—