Dispersion and Flocculation Behavior of Fine Metal Oxide Particles in                    Various Solvents [Translated]&lt;sup&gt;†&lt;/sup&gt;

Shibata, Junji; Fujii, Katsuya; Murayama, Norihiro; Yamamoto, Hideki

doi:10.14356/kona.2002029

Cited by 10 publications

(6 citation statements)

References 4 publications

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“…It is known that for proper dispersion of particles in a solvent, the particle polarity should be matched with the polarity of the solvent. Next to that, polar particles are dispersed by polar solvents and vice versa and incompatibility of particle and solvent leads to flocculation or agglomeration [ 38 ]. The role of the base oil polarity could be that, when it is properly matched (base oil B), it promotes dispersion of the generated particles and counters agglomeration.…”

Section: Discussionmentioning

confidence: 99%

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

et al. 2018

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Casing connections in the oil and gas industry are typically coated with zinc and/or manganese phosphate for corrosion protection during storage. The presence of phosphate coatings is also known to give beneficial tribological performance. The coating allows the system to run without problems long after it is worn off. This is because of two mechanisms. Glaze layer formation on the coated surface and, as will be shown, tribofilm formation on the uncoated counter-surface. An investigation into the mechanism behind this tribofilm formation is presented in this paper. The aim is to develop lubricants that exploit these mechanisms. A pin-on-disc set-up was used to investigate the interaction of a manganese phosphated disc and bare counter surface. Six base oils with different polarity and viscosity were used. The resulting tribofilms were analysed using optical microscopy, scanning electron microscopy, X-ray diffractometry, X-ray photoelectron spectroscopy, focused ion beam, and atomic force microscopy. The tribofilm is robust, amorphous, and only forms in the presence of a lubricant under sliding conditions and adsorbs on substrates with a large variation in chemical composition. It is concluded that the tribofilm consists of physisorbed manganese phosphate and formation is shear stress activated.

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Section: Discussionmentioning

confidence: 99%

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

et al. 2018

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“…Another category of experimental properties which could be useful for coding the properties of nanomaterials in biological systems are the Hansen solubility parameters27 whose use has been recently extended to determine the dispersion grade of carbon nanotubes and metal oxides 28,29. The basic equation governing their assignment is that the total cohesion energy, E , of an ensemble of molecules must be the sum of the individual energies that make it up: These energies come from contributions of the dispersion, polar, and H‐bonding forces between molecules (Figure 3).…”

Section: Descriptors and Qsar Modelsmentioning

confidence: 99%

QSAR modeling of nanomaterials

Burello

Worth

2011

WIREs Nanomed Nanobiotechnol

141

137

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A thorough understanding of the relationships between the physicochemical properties and the behavior of nanomaterials in biological systems is mandatory for designing safe and efficacious nanomedicines. Quantitative structure-activity relationship (QSAR) methods help to establish such relationships, although their application to model the behavior of nanomaterials requires new ideas and applications to account for the novel properties of this class of compounds. This review presents and discusses a number of recent inspiring applications of QSAR modeling and descriptors for nanomaterials with a focus on approaches that attempt to describe the interactions that take place at the nano/bio-interface. The paradigm shift from classic to nano-QSAR currently relies on both theoretically and experimentally derived descriptors, and the solutions adopted for modeling are diverse, mirroring the structural and behavioral heterogeneity of nanomaterials. Research should focus on both aspects of a QSAR study: the generation of nanospecific theoretical descriptors and experimental test data.

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“…These other terms E s and E ch are developed by the difference between the bulk and double layer, pH value, Faraday constant, and so on. 13 For the ash in the coal, it produces the van der Waals attractive energy E v with the amine solvent, which is determined as the following equation, 25 = − +…”

Section: ■ Adsorption Energy Modelmentioning

confidence: 99%

“…For the ash in the coal, it produces the van der Waals attractive energy E v with the amine solvent, which is determined as the following equation, …”

Section: Adsorption Energy Modelmentioning

confidence: 99%

Determining the Interactive Effects in CO₂ Capture Integrated with Coal Flotation by High-Order Multifield Synergy Model

Hong

Zhang

et al. 2018

Ind. Eng. Chem. Res.

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CO 2 capture is very essential to mitigate the greenhouse gas control. However, the CO 2 desorption is quite costly during CO 2 capture. To reduce the cost, the CO 2 desorption integrated with coal flotation was developed as a retrofitted process, which can simultaneously achieve the CO 2 desorption and coal flotation. To determine the key interactive effects between coal, amine, and CO 2 in the process, a high-order multifield synergy model was developed accordingly. According to the high-order multifield synergy model, the effects of coal particle diameter, coal weight fraction, CO 2 loading, and amine on the CO 2 desorption and coal flotation were analyzed in detail. It was found that there is almost twice the CO 2 amount at coal weight fraction of 0.06 than that at a coal weight fraction of 0.02. The coal recovery rate at 0.35 mol/mol is twice of that at 0.15 mol/mol. The adsorption energy, adsorption layer thickness, and zeta potential determine the interactive effects between coal, amine, and CO 2 . The coal, amine, and CO 2 system increases the coal recovery rate by 25% and reduces the CO 2 desorption energy by 20% with desorption temperature below 373 K. The high-order multifield synergy model shows the advantages of higher prediction accuracy and is easier to converge than the conventional multifield synergy model.

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Dispersion and Flocculation Behavior of Fine Metal Oxide Particles in Various Solvents [Translated]<sup>†</sup>

Abstract: The objective of this study is to investigate the relation between the f locculation and dispersion of

Cited by 10 publications

References 4 publications

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

QSAR modeling of nanomaterials

Determining the Interactive Effects in CO₂ Capture Integrated with Coal Flotation by High-Order Multifield Synergy Model

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Dispersion and Flocculation Behavior of Fine Metal Oxide Particles in Various Solvents [Translated]<sup>†</sup>

Abstract: The objective of this study is to investigate the relation between the f locculation and dispersion of

Cited by 10 publications

References 4 publications

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

Characterization of the Adsorption Mechanism of Manganese Phosphate Conversion Coating Derived Tribofilms

QSAR modeling of nanomaterials

Determining the Interactive Effects in CO2 Capture Integrated with Coal Flotation by High-Order Multifield Synergy Model

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Product

Resources

About

Determining the Interactive Effects in CO₂ Capture Integrated with Coal Flotation by High-Order Multifield Synergy Model