Superhydrophobic Calcium Aluminate Cement with Super Mechanical Stability

Wang, Fajun; Lei, Sheng; Ou, Junfei; Xue, Mingshan; Li, Changquan; Li, Wen

doi:10.1021/acs.iecr.9b01188

Cited by 37 publications

(14 citation statements)

References 53 publications

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“…The corrosion inhibition efficiency (η) , can be calculated as follows where i corr and i corr 0 are the corrosion current density for the samples with and without superhydrophobicity, respectively. In general, a low i corr with a positive E corr as well as a high R p corresponds to the outstanding corrosion resistance. − When compared to a bare aluminum alloy ( i corr = 29.33 μA·cm –2 ), the superhydrophobic samples showed low i corr , high R p , and a considerably positive shift in E corr . The results indicated that the superhydrophobic surface is able to improve the anticorrosion performance of metal.…”

Section: Resultsmentioning

confidence: 96%

Superhydrophobic Surface with Stepwise Multilayered Micro- and Nanostructure and an Investigation of Its Corrosion Resistance

Wei

Karthik

et al. 2019

Langmuir

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We develop a fluorine-free preparation of the superhydrophobic surface on an aluminum alloy with anticorrosion performance and mechanical robustness. The surface morphology, chemical composition, and water repellency were determined with SEM, CLSM, EDS, FT-IR, TG, and contact-angle measurements, respectively. The aluminum matrix superhydrophobic surface (STA-PDMS-ZnO sample) was able to display excellent repellency to water with a WCA of 152°and a WSA of 2°. The outstanding superhydrophobicity on the as-prepared surface was greatly related to the construction of stepwise multilayered micro-and nanostructure within the superhydrophobic surface. Because of the special surface structure, the mechanical robustness and corrosion resistance of the STA-PDMS-ZnO sample were improved. Notably, the anticorrosion mechanism by air pockets was explained by the comparison of two superhydrophobic surfaces prepared with the same low-surface-energy chemicals. The superhydrophobic surface with a multilayered micro-and nanostructure (STA-PDMS-ZnO sample) showed greater corrosion resistance than the surface coated by superhydrophobic modification (control sample). This is because of the entrapments of numerous air pockets within the aluminum matrix superhydrophobic surface, thus strengthening the corrosion resistance. On the basis of the results, the multidimensional superhydrophobic surface is promising for having a good application future in the field of metal corrosion protection.

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Section: Resultsmentioning

confidence: 96%

Superhydrophobic Surface with Stepwise Multilayered Micro- and Nanostructure and an Investigation of Its Corrosion Resistance

Wei

Karthik

et al. 2019

Langmuir

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“…To date, a variety of applications of calcium aluminate-containing materials have been reported, including catalyst 16 , electrides and ionic conductor 17 , superhydrophobic cement 18 , biomaterial for dentistry and orthopedic fields 19 , bone cement 20 , hard tissue repair 21 , nanocatalyst for biodiesel production 22 , and adsorbent to remove aqueous Cr(VI) 23 . However, a review of the literature reveals that there are no records of monocalcium aluminate (CaAl 2 O 4 ) being used to remove MG dye from aqueous media.…”

Section: Introductionmentioning

confidence: 99%

A reusable mesoporous adsorbent for efficient treatment of hazardous triphenylmethane dye wastewater: RSM-CCD optimization and rapid microwave-assisted regeneration

Arabkhani

Javadian

Asfaram

et al. 2021

Sci Rep

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In this research, mesoporous calcium aluminate nanostructures (meso-CaAl2O4) were synthesized using a citric acid-assisted sol–gel auto-combustion process as the potential adsorbent to eliminate toxic triphenylmethane dye malachite green (MG) from synthetic/real effluent. The surface morphology of meso-CaAl2O4 was highly porous with nanometric size and non-homogeneous surface. The specific surface area, total pore volume, and BJH pore diameter of meso-CaAl2O4 were 148.5 m2 g−1, 1.39 cm3 g−1, and 19 nm, respectively. The meso-CaAl2O4 also showed a very high heat resistance, due to losing only 7.95% of its weight up to 800 °C, which is mainly related to the moisture loss. The optimal adsorption conditions were obtained based on response surface methods (RSM)-central composite design (CCD) techniques. The Langmuir isotherm model was used for fitting the adsorption measurements, which presented 587.5 mg g–1 as the maximum adsorption capacity of the dye. The data obtained from the adsorption kinetics model were found to correspond to the pseudo-second-order model. Also, the thermodynamic parameters including enthalpy change (ΔH°), entropy change (ΔS°), and Gibbs free energy change (ΔG°) indicated that MG dye adsorption by the meso-CaAl2O4 was feasible, endothermic, and occurred spontaneously. Furthermore, the meso-CaAl2O4 was regenerated by microwave irradiation under 900 W at 6 min, and the MG dye removal efficiency was remained over 90% after the five cycles of microwave regeneration.

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“…At present, researchers mostly use binders to improve the mechanical stability of superhydrophobic surfaces. − Lu et al used adhesives to attach perfluorosilane-coated titanium dioxide nanoparticles to various materials . Adhesives were used to bond coatings to various substrates to create a strong, self-cleaning surface.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophobic Carbon Nanotube–Metal Rubber Composites for Emulsion Separation

Ren

Fan

Zhang

et al. 2021

ACS Appl. Nano Mater.

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Poor mechanical stability of the superhydrophobic surface is the fundamental reason that limits its wide application. In the present study, metal rubber (MR) with a three-dimensional elastic porous characteristic was applied as the substrate. Multiwalled carbon nanotubes (MWCNTs) were filled into the pores of MR through suction and filtration of the MWCNTs suspension. Using an in situ bonding method, MWCNTs were anchored in the MR pores by poly(dimethylsiloxane) (PDMS). Consequently, a type of superhydrophobic material with a three-dimensional network frame protection was constructed. The emulsion separation mechanism of superhydrophobic MR was investigated using the plane random segmentation theory and theoretical model of deep filtration. By analysis of the depth retention effect in the separation process, the separation efficiency of the emulsion was predicted. In addition, the results show that the prepared superhydrophobic MR had an excellent purification capability for a water-in-lubricating oil emulsion and outstanding mechanical and chemical stability.

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Superhydrophobic Calcium Aluminate Cement with Super Mechanical Stability

Cited by 37 publications

References 53 publications

Superhydrophobic Surface with Stepwise Multilayered Micro- and Nanostructure and an Investigation of Its Corrosion Resistance

Superhydrophobic Surface with Stepwise Multilayered Micro- and Nanostructure and an Investigation of Its Corrosion Resistance

A reusable mesoporous adsorbent for efficient treatment of hazardous triphenylmethane dye wastewater: RSM-CCD optimization and rapid microwave-assisted regeneration

Superhydrophobic Carbon Nanotube–Metal Rubber Composites for Emulsion Separation

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