NSLS-II Seminar

"Structure/Properties of Thin Film Composite Membranes for Water Purification"

Presented by Christopher M. Stafford, NIST, Gaithersburg, MD

Tuesday, November 20, 2018, 11:00 am — NSLS-II Bldg. 744

Access to sustainable sources of clean water is critical to manufacturing, agriculture, energy production, public health, and national security. One prominent technology for meeting this need is membrane-based separations of water and dissolved contaminants/solutes via nanofiltration and reverse osmosis. This field is dominated by polymer-based membranes and has relied on complex, empirically optimized chemistries and structures based on material selections made decades ago. The resulting processes are energy intensive and suffer from limited performance lifetimes. We are bringing our deep expertise in measurement science and polymer science to address this critical technology, specifically by establishing fundamental structure/property relationships that correlate membrane topology and dynamics to membrane performance. In this talk, I will describe our recent efforts in synthesizing model membrane materials based on molecular layer-by-layer deposition of aromatic polyamide networks, as well as our measurements of swelling, crosslink density and mechanics of both model and commercial membrane materials. This understanding will enable industry to develop and manufacture next generation, energy-efficient membrane materials.

Hosted by: Ben Ocko

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