Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session S17: Macromolecular Engineering of Formulations
8:00 AM–10:36 AM,
Thursday, March 17, 2022
Room: McCormick Place W-184BC
Sponsoring
Unit:
DPOLY
Chair: Vivek Sharma, University of Illinois Chicago
Abstract: S17.00004 : Effect of the Polymer Glass Transition on Size Stability in Salted Colloidal Dispersions
9:00 AM–9:12 AM
Presenter:
Douglas Scott
(Princeton University)
Authors:
Douglas Scott
(Princeton University)
Robert K Prud'homme
(Princeton University)
Rodney Priestley
(Princeton University)
In this work, the size stability of salted NP dispersions is demonstrated to directly correlate with the glassy behavior of constituent polymers. Using flash nanoprecipitation as a versatile fabrication technique, dispersions of rubbery and glassy polymers are produced and their stability in the presence of non-adsorbing and adsorbing salts is measured. For a non-adsorbing salt such as KCl, rubbery NPs exhibit a higher critical coagulation concentration than glassy NPs whereas for hydrophobic adsorbing salts, glassy NPs underwent surface potential inversion corresponding with reentrant stability trends. Using these findings, dispersions are formulated to enable their use as Pickering emulsifiers.
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