Effect of Polymer Surface Modification of Superparamagnetic
Iron Oxide Nanoparticle Dispersions in High Salinity Environments
Posted on 2019-08-09 - 19:44
Superparamagnetic
nanoparticles (SPIONs) can be used as nuclear
magnetic resonance (NMR) signal enhancement agents for petroleum exploration.
This enhancement effect is uniform if SPIONs are monodisperse in size
and in composition; yet it is challenging to synthesize monodisperse
particles that do not aggregate in high salinity petroleum brine.
Here, we report a method to synthesize individual SPIONs coated with
tunable surface coating densities of poly(2-acrylamido-2-methyl-1-propanesulfonic
acid (pAMPS) with a catechol end-group (pAMPS*). To establish parameters
under which pAMPS*-coated SPIONS do not aggregate, we compared computational
predictions with experimental results for variations in pAMPS* chain
length and surface coverage. Using this combined theoretical and experimental
approach, we show that singly dispersed SPIONs remained stabilized
in petroleum brine for up to 75 h with high surface density pAMPS*.
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Yu, Jin; Nap, Rikkert J.; Szleifer, Igal; Wong, Joyce Y. (2019). Effect of Polymer Surface Modification of Superparamagnetic
Iron Oxide Nanoparticle Dispersions in High Salinity Environments. ACS Publications. Collection. https://doi.org/10.1021/acs.langmuir.9b01944
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AUTHORS (4)
JY
Jin Yu
RN
Rikkert J. Nap
IS
Igal Szleifer
JW
Joyce Y. Wong
KEYWORDS
SPIONSuperparamagnetic Iron Oxide Nanoparticle DispersionsSPIONSchain lengthpetroleum explorationdensity75 hHigh Salinity Environments Superparamagnetic nanoparticlessignal enhancement agentscatechol end-groupPolymer Surface Modificationenhancement effecttunable surface coating densitiesNMRsalinity petroleum brinepAMPSsurface coveragepetroleum brine