Weak-base anion exchange membranes by amination of chlorinated polypropylene with polyethyleneimine at low temperatures

J-H Hong; D. Li; H. Wang

doi:10.1016/j.memsci.2008.03.017

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Weak-base anion exchange membranes by amination of chlorinated polypropylene with polyethyleneimine at low temperatures

Journal article

Peer reviewed

Weak-base anion exchange membranes by amination of chlorinated polypropylene with polyethyleneimine at low temperatures

J-H Hong, D. Li and H. Wang

Journal of Membrane Science, Vol.318(1-2), pp.441-444

2008

DOI: https://doi.org/10.1016/j.memsci.2008.03.017

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Abstract

Commercial chlorinated polypropylene (CPP) was aminated with polyethyleneimine (PEI) in a solvent mixture of acetone and toluene at low temperatures (30–55 °C), yielding colloidal PEI-aminated CPP suspensions and thus anion exchange membranes. The chemical structure, chemical composition, microstructure, and thermal stability of CPP and PEI-aminated CPP membranes were characterized by Fourier infrared spectroscopy (FT-IR), elemental analysis, scanning electron microscopy (SEM), thermogravimetric analysis (TG), respectively. The ion exchange capacity, water uptake, methanol uptake, and ionic conductivity of PEI-aminated CPP membranes were also determined. The PEI-CPP membranes exhibited high ionic conductivities ranging from 0.89 × 10−2 to 1.36 × 10−2 S/cm, and anion exchange capacities ranging from 7.38 to 9.33 mmol/g dry membrane while the degree of amination was raised from 50.2 to 65.3%. The water uptake of the PEI-CPP membrane increased whereas the methanol uptake dropped with the degree of amination increased. The PEI-CPP membranes developed here may be useful for a range of applications, and can be further converted into quaternary ammonium-based membranes for direct methanol alkaline fuel cells.

Details

Title: Weak-base anion exchange membranes by amination of chlorinated polypropylene with polyethyleneimine at low temperatures
Authors/Creators: J-H Hong (Author/Creator)
D. Li (Author/Creator)
H. Wang (Author/Creator)
Publication Details: Journal of Membrane Science, Vol.318(1-2), pp.441-444
Publisher: Elsevier BV
Identifiers: 991005542148207891
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Citation topics: 2 Chemistry; 2.62 Electrochemistry; 2.62.571 Fuel Cell Membranes
Web Of Science research areas: Engineering, Chemical; Polymer Science
ESI research areas: Chemistry