Electrochemical modification of cation exchange membrane with polyaniline for improvement in permselectivity

Influence of anion hydration status on selective properties of a commercial anion exchange membrane electrochemically impregnated with polyaniline deposits

“…Despite this, however, efforts have concentrated mainly on their use as cation-exchange membranes, [11][12][13][21][22][23][24] while there is very little information on anion exchange membrane modications using different chemical forms of polyaniline.…”

“…[7][8][9][10][11][12][13] For example, polyaniline (PAni) has been used to impart specic properties to the membranes becausebesides its exibility and unique electrical conductivity -this material has the special capacity to generate charges in its bulk under certain conditions (such as chemical or electrochemical doping). [11][12][13][14][15][16][17] Furthermore, its different chemical forms exhibit not only specic structural characteristics, but also particular hydrophobic/hydrophilic properties. For example, the nonprotonated form of PAni, named leucoemeraldine base, is more hydrophobic due to the polar C-N, C]N, and N-H bonds in its structure; moreover, due to its ability to form hydrogen bonds, leucoemeraldine base presents the most compact and rough structure among the different PAni forms.…”

Feasibility study on surface modification of cation exchange membranes by quaternized chitosan for improving its selectivity

“…used as modified monomer to form modified layer through different polymerization-induced method and obtained similar results. For examples, Sivaraman et al [11] adopted electrochemical deposition of polyaniline and observed Zn 2+ leakage changing from 6.8% to 1%. Sophie et al [9] used (NH 4 ) 2 S 2 O 8 as oxidizing agent to induce in situ polymerization of aniline for CEM surface modification and decreased Zn 2+ leakage from 7.9% to 0.1%.…”

“…According to literatures reported, the formation of the cationic layer, apart from the chemical modification of base membrane material [2,3], mostly limited to several kinds of conducting polymers such as polypyrrole [1,4,5], polyaniline [6][7][8][9][10][11] and polyethyleneimine [12][13][14] though their modified methods were different from each other.…”

Influence of conditions of polyaniline synthesis in perfluorinated membrane on electrotransport properties and surface morphology of composites

“…A lot of researches are focused on Nafion® membranes modified by polyaniline (PANI) since they exhibit unique electrical, electrochemical, and optical properties [1][2][3]. These materials are perspective for using both in electrochemistry as coating of electrodes [2,[4][5][6][7] and in fuel cells and electromembrane technology as separation diaphragms [8][9][10][11][12][13][14]. The special interest represents application of such composite membranes in electrodialysis processes for concentration of acids solutions.…”