Dataset for: Stabilization of Iron Oxide Nanoparticles in High Sodium and Calcium Brine at High Temperatures with Adsorbed Sulfonated Copolymers

The choice of the proper polymer composition by phase behavior studies at high salinity and temperature is expected to facilitate rapid screening of potential candidates for colloidal stabilization. With magnetic iron oxide nanoparticles (IO NPs) as our metal oxide colloid, we tested a series of sulfonated random and block copolymers. A series of sulfonated random and block copolymers were adsorbed on the surface of ∼100 nm iron oxide (IO) nanoparticles (NPs) to provide colloidal stability in extremely concentrated brine composed of 8% wt NaCl + 2% wt CaCl2 (API brine; 1.4 M NaCl + 0.2 M CaCl2) at 90 °C. We used a Ca2+-mediated adsorption of anionic acrylic acid-containing sulfonated polymers to preform citrate-stabilized IO nanoclusters, to investigate a large number of polymer coatings. This dataset reports results of Dynamic Light Scattering (DLS), zeta potential, and thermogravimetric analysis used to characterize iron oxide nanoparticles before and after coating at ambient and elevated temperatures. DLS was used to measure hydrodynamic diameter of poly(2-methyl-2-acrylamidopropanesulfonate-co-acrylic acid) (poly(AMPS-co-AA))copolymers. Thermogravimetric analysis was performed to quantify organic content. Percent weight organics measurements are reported with [Ca^2+]/[COO^-]poly molar ratio for high citrate and low citrate iron oxide particles. DLS was also used to measure hydrodynamic diameter distribution of citrate coated iron oxides and (poly(AMPS-co-AA) coated iron oxides in both deionized water and American Petroleum Institute brine. Electrophoretic mobility of (poly(AMPS-co-AA) coated iron oxide clusters at various concentration of NaCl is provided as zeta potential measured using a Brookhaven ZetaPALS instrument and fit to the Oshima model. These data are presented in Bagaria et al., 2013, Langmuir, 29, 3195 dx.doi.org/10.1021/la304496a.通过在高盐度与高温条件下开展相行为研究以筛选合适的聚合物组合物，有望加速胶体稳定剂潜在候选物的快速筛选流程。 本研究以磁性氧化铁纳米颗粒（magnetic iron oxide nanoparticles, IO NPs）作为金属氧化物胶体，测试了一系列磺化无规及嵌段共聚物。我们将一系列磺化无规及嵌段共聚物吸附于约100 nm氧化铁（iron oxide, IO）纳米颗粒（nanoparticles, NPs）表面，使其可在由8%质量分数NaCl + 2%质量分数CaCl₂组成的超高浓度盐水（API brine；1.4 M NaCl + 0.2 M CaCl₂）中，于90 ℃条件下实现胶体稳定。我们采用钙离子介导的吸附方式，将含阴离子丙烯酸的磺化聚合物负载至预先经柠檬酸盐稳定的氧化铁纳米团簇表面，以此探究大量聚合物涂层的应用效果。 本数据集报告了动态光散射（Dynamic Light Scattering, DLS）、Zeta电位以及热重分析（thermogravimetric analysis）的测试结果，用于表征常温与高温条件下包覆前后的氧化铁纳米颗粒。 其中，动态光散射用于测定聚(2-甲基-2-丙烯酰胺基丙磺酸钠-丙烯酸)共聚物[poly(2-methyl-2-acrylamidopropanesulfonate-co-acrylic acid), poly(AMPS-co-AA)]的流体力学直径；热重分析用于量化样品中的有机组分含量，有机重量百分比的测量结果将与[Ca²⁺]/[COO⁻]聚合物摩尔比一同呈现，该比值对应高柠檬酸盐与低柠檬酸盐氧化铁颗粒。 此外，动态光散射还被用于测定柠檬酸盐包覆的氧化铁颗粒以及poly(AMPS-co-AA)包覆的氧化铁颗粒，在去离子水与API盐水中的流体力学直径分布。 我们还提供了不同NaCl浓度下poly(AMPS-co-AA)包覆的氧化铁团簇的电泳迁移率数据，该数据以Zeta电位形式呈现，通过布鲁克海文ZetaPALS仪器（Brookhaven ZetaPALS）测得，并拟合至大岛模型（Oshima model）。 相关研究数据已发表于Bagaria等人2013年刊载于《朗缪尔（Langmuir）》期刊第29卷第3195页的论文，DOI: 10.1021/la304496a。