Particle Growth in Mixed Matrix Polymer Membranes: Using - PowerPoint PPT Presentation

Apr 01, 2023 •391 likes •489 views

Particle Growth in Mixed Matrix Polymer Membranes: Using Ultra-Small Angle Neutron Scattering to Observe Transient Phenomena in Casting Solutions Rachel R. Ford, Joey D. Kim, Kunlun Hong, Mamadou S. Diallo, and Julia A. Kornfield* Korea-US

Particle Growth in Mixed Matrix Polymer Membranes: Using Ultra-Small Angle Neutron Scattering to Observe Transient Phenomena in Casting Solutions Rachel R. Ford, Joey D. Kim, Kunlun Hong, Mamadou S. Diallo, and Julia A. Kornfield* Korea-US Nano Forum September 27, 2016
Mixed matrix membranes with in-situ generated polymeric particles Kotte, et al. Environ. Sci. Technol . 2015 , 49 , (16) 9431 – 9442. Hwang, et al. Water Res . 2015 , 73 , 181 – 192. Pure PVDF membrane PEI/PVDF mixed matrix membrane Poly(vinylidene fluoride) Poly(ethyleneimine) PEI PVDF 400,000 g/mol 600 g/mol Sept. 27, 2016 2
Avenues of study of mixed matrix membranes with in-situ generated polymeric particles Fundamental Study of Structure Development in Mixed Matrix Membranes Catalytic Polymer Films for Thin Film Composite Membranes Electrochemical Reduction of CO 2 for Nanofiltration Dendrimer-like particle with encapsulated Cu(0) clusters Glassy Carbon Electrode Sept. 27, 2016 3
Preparation of mixed matrix membranes PVDF + PEI + PVDF Dissolved PVDF + PEI Acid + ECH in Good Solvent Epichlorohydrin PVDF PEI ( ECH ) Non-solvent Induced Phase Separation PVDF + Crosslinked Cast Membrane Particles Sept. 27, 2016 4
Preparation of mixed matrix membranes PVDF + PEI + PVDF Dissolved PVDF + PEI Acid + ECH in Good Solvent Epichlorohydrin PVDF PEI ( ECH ) Non-solvent Induced Phase Separation PVDF + Crosslinked Cast Membrane Particles Sept. 27, 2016 5
The problem demanded a new methodology: Novel application of Ultra-Small Angle Neutron Scattering (USANS) • Slowed reaction time by decreasing concentration of ECH • Decreased acquisition time by an order of magnitude • Novel way to study structure in membrane casting solutions Sept. 27, 2016 6
Looking Forward • Isolate structural contributions of each component in the casting solution using fully deuterated amine precursors • Explore ion-rejecting coatings for NF membranes • Precipitate and encapsulate copper nanoparticles in dendrimer-like particles of membranes for electrochemical reduction of CO 2 Sept. 27, 2016 7
Acknowledgements • Center for Nanophase Materials Sciences • NIST Center for Neutron Research • Resnick Sustainability Institute • Kornfield Group & Prof. Diallo Sept. 27, 2016 8

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