Mobility of Sub-50 nm Iron Oxide Nanoparticles with Ultrahigh Initial Magnetic Susceptibility in Intact Berea Sandstone at High Salinity

Dandamudi, Chola Bhargava; Iqbal, Muhammad Waseem; Lyon-Marion, Bonnie A.; Han, Jae Jin; Fei, Yunping; Lee, Joohyung; Ellison, Christopher J.; Pennell, Kurt D.; Johnston, Keith P.

doi:10.1021/acs.iecr.2c00964

Cited by 2 publications

(1 citation statement)

References 64 publications

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“…The dense particle film formed can inhibit the coalescence and disproportionation of the bubble [13]. Many studies have been carried out on the effect of particles as a stabilizer on foam stability [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mineral Powders on the Properties of Foam Concrete Prepared by Cationic and Anionic Surfactants as Foaming Agents

Liu,

Chen,

Fang

et al. 2024

Materials

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Foam concrete is a type of cement mortar in which air bubbles are introduced using an appropriate blowing agent. The complex conditions for the preparation of solid particle stabilized foams limit their wide application in construction. In this study, a method of adding small amounts of calcite (Cal) and muscovite (Mus) to the cement paste matrix is proposed to improve the properties of foam concrete prepared with cationic and anionic surfactants as blowing agents. The effects of mineral powders on the flowability, compressive strength, water absorption, pore characteristics, thermal conductivity and frost resistance of foam concrete were investigated and the enhancement mechanism was revealed by the results of XRD, low−field nuclear magnetic resonance (LF−NMR), Fourier transform infrared spectroscopy (FTIR) and SEM. The results showed that the mineral powders interacted with anionic and cationic surfactants through physical adsorption. Whether anionic or cationic surfactants were used as blowing agents, the addition of mineral powders promoted the formation of shell−like structures around the foam, thus enhancing the performance of foam concrete. As a result, the fluidity, compressive strength and frost resistance of the foam concrete increased, the water absorption and thermal conductivity decreased, and the average size of the pores decreased.

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Section: Introductionmentioning

confidence: 99%

Effect of Mineral Powders on the Properties of Foam Concrete Prepared by Cationic and Anionic Surfactants as Foaming Agents

Liu,

Chen,

Fang

et al. 2024

Materials

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Synthesis and Characterization of Magnetic Nanodroplets for Flowback Analysis in Fractured Reservoirs

Ahmadi

Ding

Bryant

et al. 2023

Day 2 Thu, March 16, 2023

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Hydraulic fracturing has facilitated the rapid development of tight reservoirs throughout the world in the past decades. A common challenge arising from multistage hydraulic fracturing is the accurate characterization of the complexity and conductivity of the fracture networks, for optimizing the well performance as well as the subsequent production. Prevalent operations carried out on hydraulically fractured wells are tracer injections along with the fracturing fluid and flowback analysis, which are indispensable to condition the well for long-term performance and decrease the operational time. In this paper, a new polymer-coated iron oxide (Fe3O4) nanoparticle (NP) has been synthesized, which can emulsify and stabilize nano-oil-droplets in a continuous water phase and these Pickering nanodroplets provide potential applications for the characterization of fractures by flowback analysis in tight reservoirs due to their pivotal properties, including being superparamagnetic with ability to detect in-situ, easily synthesized, size controllable, strong stability, minimal retention in fractures and environmental benign features. To apply these magnetic nanodroplets for fracture characterization, two concerns should be considered, including the long-term stability and transport behavior of these Pickering nanodroplets, which is demonstrated in this study. Herein, iron oxide nanoparticles were firstly functionalized to improve their hydrophilicity, and then nanoemulsion samples were emulsified utilizing these engineered nanoparticles. Two different factors, including different hydrocarbons and emulsification energy, were considered to investigate their impact on the stability of the nanoemulsion. This is because they are extremely important for the stabilization of the Pickering nanoemulsion. As a result, some characterization tests were performed to recognize the stability behaviour of the systems and structure of nanoemulsion through nanodroplet size distribution, z-potential, bulk rheology, and screening tests. Moreover, the nanoemulsion stability is examined through low-field nuclear magnetic resonance (NMR) relaxometry and X-ray CT imaging. Experimental results reveal that carefully synthesized polymer-coated Fe3O4 NPs can emulsify the oil and water to form a sufficiently stable oil-in-water (O/W) Pickering nanoemulsion. The optimized composition to have a more stable emulsion is using hexadecane as the oil phase because of its high density and low solubility in water to reduce the Ostwald Ripening. An emulsification energy of 40 kJ is found to generate optimum droplet size distribution, thus providing the best nanoemulsion stability.

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Mobility of Sub-50 nm Iron Oxide Nanoparticles with Ultrahigh Initial Magnetic Susceptibility in Intact Berea Sandstone at High Salinity

Cited by 2 publications

References 64 publications

Effect of Mineral Powders on the Properties of Foam Concrete Prepared by Cationic and Anionic Surfactants as Foaming Agents

Effect of Mineral Powders on the Properties of Foam Concrete Prepared by Cationic and Anionic Surfactants as Foaming Agents

Synthesis and Characterization of Magnetic Nanodroplets for Flowback Analysis in Fractured Reservoirs

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