Orthogonal Wettability of Hierarchically Textured Metal Meshes as a Means of Separating Water/Oil Emulsions

O'Loughlin, Thomas E.; Martens, Sean J.; Ren, Suchang Roy; McKay, P. F.; Banerjee, Sarbajit

doi:10.1002/adem.201600808

Cited by 27 publications

(43 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent times, the steam-assisted gravity drainage (SAGD) process has emerged as one of the pre-eminent means of extracting viscous oil in the Canadian Oil Sands spread across Northern Alberta and Saskatchewan 3 , 4 . In this process, steam is injected down a wellbore through an injection well creating a steam chamber that increases the temperature of the viscous oil deposits, thereby reducing the viscosity of the oil and allowing it to drain down to a lower production well (under the influence of gravity) from which it is extracted using powerful pumps as an emulsified mixture of water and oil 5 , 6 . Apart from load-bearing characteristics, the cement components deployed in SAGD wellbores also have to endure the severe thermal cycling inherent in the SAGD process; the oilwell cement must further be flexible and yet dense in order to avoid microannulus formation, adhere conformally to metal tubing, and provide zonal isolation 7 – 9 .…”

Section: Introductionmentioning

confidence: 99%

Incorporation of Hydroxyethylcellulose-Functionalized Halloysite as a Means of Decreasing the Thermal Conductivity of Oilwell Cement

Cho

Waetzig

Udayakantha

et al. 2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

The significant heat loss and severe thermal fluctuations inherent in steam-assisted gravity drainage (SAGD) and cyclic steam stimulation (CSS) impose considerable constraints on well cementing. In order to obtain better energy efficiency and mechanical robustness, there is considerable interest in the development of low-thermal-conductivity cement that can provide a combination of enhanced thermal insulation and mechanical resilience upon thermal cycling. However, the current palette of thermal cements is exceedingly sparse. In this article, we illustrate a method for decreasing the thermal conductivity of cement by inclusion of hydroxyethylcellulose-functionalized halloysite nanotubes. Halloysite/hydroxyethylcellulose inclusions offer an abundance of disparate interfaces and void space that can effectively scatter phonons, thereby bringing about a pronounced reduction of thermal conductivity. The microstructure of the nanocomposite cementitious matrix is strongly modified even as the compositional profile remains essentially unaltered. Modified cement nanocomposites incorporating halloysite nanotubes along with hydroxyethylcellulose in a 8:1 ratio with an overall loading of 2 wt.% exhibit the lowest measured thermal conductivity of 0.212 ± 0.003 W/m.K, which is substantially reduced from the thermal conductivity of unmodified cement (1.252 W/m.K). The ability to substantially decrease thermal conductivity without deleterious modification of mechanical properties through alteration of microstructure, inclusion of encapsulated void spaces, and introduction of multiple phonon-scattering interfaces suggests an entirely new approach to oilwell cementing based on the design of tailored nanocomposites.

show abstract

Section: Introductionmentioning

confidence: 99%

Incorporation of Hydroxyethylcellulose-Functionalized Halloysite as a Means of Decreasing the Thermal Conductivity of Oilwell Cement

Cho

Waetzig

Udayakantha

et al. 2018

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…As a result, efforts are being made to minimize the pollution associated with oil-water mixtures by devising appropriate strategies for the separation of these immiscible liquids. [1,3] Among the worthwhile techniques such as air flotation, flocculation, and oil-absorbing materials, the superhydrophobic materials are gaining preferred interest, [4,5] as the rest involve complicated processing, high cost, and heavy machinery together with limited portability.…”

Section: Introductionmentioning

confidence: 99%

Durable and Recyclable Superhydrophobic Fabric and Mesh for Oil–Water Separation

et al. 2017

View full text Add to dashboard Cite

The authors report durable and recyclable nanocomposite superhydrophobic coatings on two different substrates of fabric and mesh as prepared by titania nanoparticles and polydimethysiloxane (PDMS). The felted wool fabric and the steel mesh are initially coated with a thin layer of PDMS, which is followed by the deposition of nanocomposite coating of titania nanoparticles embedded in PDMS. The dual surface modification of two kinds of substrates generates highly hydrophobic surface character, which is retained after durability performance as measured in ultrasonication, sand, and emery paper abrasion tests. Oil-water separation experiments are performed using water mixtures with four oils, that is, n-hexane, toluene, kerosene, and diesel to ensure the industrial applications of prepared composite materials.Moreover, nanocomposite coatings are tested for several cycles of oil-water separation in harsh conditions such as hot water, sodium chloride, and hydrochloric acid. The adopted approach improves the separation performance by inducing durability of the prepared nanocomposite coatings along with introducing recyclable character.

show abstract

“…Stock solutions of TCS and TCC (1 g/L) were prepared in acetone. TZnO were synthesized from Zn metal (99%, McMaster-Carr, Elmhurst, IL) as described previously (O'Loughlin et al, 2017). T-ZnO has an average of 12 m −1 surface area to volume ratio (O'Loughlin et al, 2017).…”

Section: Chemicalsmentioning

confidence: 99%

Effectiveness of zinc oxide-assisted photocatalysis for concerned constituents in reclaimed wastewater: 1,4-Dioxane, trihalomethanes, antibiotics, antibiotic resistant bacteria (ARB), and antibiotic resistance genes (ARGs)

Hwangbo

Claycomb

Liu

et al. 2019

Science of The Total Environment

Self Cite

View full text Add to dashboard Cite

Microbial and emerging chemical contaminants are unwanted constituents in reclaimed wastewater, due to the health concerns of using the water for agricultural irrigation, aquifer recharges, and potable water. Removal of these contaminants is required but it is currently challenging, given that there is no simple treatment technology to effectively remove the mixture of these contaminants. This study examined the effectiveness of ZnO-assisted photocatalytic degradation of several constituents, including 1,4-dioxane, trihalomethanes (THMs), triclosan (TCS), triclocarban (TCC), antibiotic resistant bacteria (ARB) and antibiotic resistant genes (ARGs), under low intensity of UV exposure. E. coli with an ARGs-carrying circular plasmid (pUC19) was used as a model antibiotic resistant bacterium. Our results show that commercial zinc oxide (C-ZnO) assisted photodegradation of 1,4-dioxane, and dehalogenation of THMs, TCS, and TCC, while tetrapodal zinc oxide (T-ZnO) enhanced the dehalogenation of TCS and TCC. Additionally, T-ZnO assisted the photocatalytic inactivation of the E. coli within 6 h and caused structural changes in the plasmid DNA (pUC19) with additional UV exposure, resulting in nonfunctional AGR-containing plasmids. These results also suggest that higher UV dose is required not only to inactivate ARB but also to damage ARGs in the ARB in order to decrease risks in promoting ARB population in the environment. Overall, our results implicated that, under

show abstract

Orthogonal Wettability of Hierarchically Textured Metal Meshes as a Means of Separating Water/Oil Emulsions

Cited by 27 publications

References 28 publications

Incorporation of Hydroxyethylcellulose-Functionalized Halloysite as a Means of Decreasing the Thermal Conductivity of Oilwell Cement

Incorporation of Hydroxyethylcellulose-Functionalized Halloysite as a Means of Decreasing the Thermal Conductivity of Oilwell Cement

Durable and Recyclable Superhydrophobic Fabric and Mesh for Oil–Water Separation

Effectiveness of zinc oxide-assisted photocatalysis for concerned constituents in reclaimed wastewater: 1,4-Dioxane, trihalomethanes, antibiotics, antibiotic resistant bacteria (ARB), and antibiotic resistance genes (ARGs)

Contact Info

Product

Resources

About