Imaging chemical extraction by polymer inclusion membranes using fluorescence microscopy
Clare A Henderson1, Edward A Nagul, Robert W Cattrall
1ARC Centre of Excellence for Coherent X-ray Science, Australia. School of Chemistry, University of Melbourne, 3010, Australia.
Methods and Applications in Fluorescence
|November 18, 2017
Summary
Novel fluorescence imaging reveals chemical extraction sites within polymer inclusion membranes (PIMs), showing localized environments that change with age and improving understanding of PIM function.
Area of Science:
- Membrane science
- Chemical engineering
- Materials science
Background:
- Polymer inclusion membranes (PIMs) facilitate chemical transport but their internal mechanisms remain unclear.
- PIMs often degrade rapidly, hindering industrial applications.
Purpose of the Study:
- To visualize and understand the internal chemical extraction processes within PIMs.
- To investigate the impact of membrane aging on PIM function.
Main Methods:
- Application of fluorescence imaging techniques to PIMs.
- Extraction of fluorescein as a model chemical.
- Fluorescence lifetime imaging (FLIM) to probe localized chemical environments.
Main Results:
- Identified non-uniform chemical extraction sites within PIMs, unrelated to surface features.
- Observed distinct fluorescence lifetimes in extraction zones, indicating unique local chemical conditions.
- Documented changes in these localized environments with membrane aging.
Conclusions:
- Fluorescence imaging provides unprecedented insight into PIM internal morphology and chemical processes.
- Localized chemical environments within PIMs are dynamic and affected by aging.
- This technique can advance the understanding and development of more durable PIMs.
