416555 Enhancing Cross-Linked PEO Membrane Properties By a Highly-Efficient Post-Treatment Strategy

Sunday, November 8, 2015
Exhibit Hall 1 (Salt Palace Convention Center)
Shuai Quan and Lu Shao Sr., Harbin Inst Technol, Harbin, China

Herein, we first report an extremely versatile strategy to significantly improve gas transport properties of PEO-containing cross-linked membranes based on their specific swelling properties. Low-molecular-weight poly (ethylene glycol) (PEG) was deliberately incorporated into synthesized swellable pure PEO cross-linked membrane via immersing PEO membrane into PEG-water solution and membranes with various PEG loadings are obtained. The imbedded PEG molecules can be located between polymer chains to improve chain mobility and increase chain distance, resulting in the increase of fractional free volume (FFV), which is in favor of gas diffusion. On the other hand, the increment of CO2-philic building units resulting from the imbedded PEG molecules leads to higher CO2 solubility. Finally, the simple treated membranes exhibit significant increments in both CO2 permeability (up to 762%) and CO2/H2 selectivity (up to 86%). The separation performance was correlated nicely with the microstructure of the membranes. This study may provide useful insights about the formation and mass transport behaviour of highly-efficient polymeric membrane applicable to clean energy purification and CO2 capture, and possibly bridge the material-induced technology gap between academia and industry. Most importantly, our discovered strategy has great potential for treating composite membranes and regenerating “aged” membranes to realize clean energy purification and CO2 capture by membrane technology.

Extended Abstract: File Not Uploaded
See more of this Session: Poster Session: General Topics on Separations
See more of this Group/Topical: Separations Division