Cited by 119
University of Electronic Science and Technology of China
ORCID: 0000-0002-6879-8640Publishes on Surface Modification and Superhydrophobicity, Geophysics and Gravity Measurements, Corrosion Behavior and Inhibition. 42 papers and 479 citations.
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• Robust superhydrophobic SiO 2 /epoxy coating was prepared by a one-step spraying strategy. • The superhydrophobic coating shows improved mechanical resistance and corrosion inhibition. • The mechanisms of performance enhancement were revealed through experiments and molecular simulations. • The superhydrophobic coating exhibits good chemical stability and hydrophobic repair properties. In this work, a robust epoxy adhesive (EP) @ superhydrophobic SiO 2 (SH-SiO 2 )-based superhydrophobic coating was prepared on the aluminum substrate by a simple one-step spraying strategy. The prepared EP@SH-SiO 2 coating exhibits hierarchical micro/nanostructures and is capable of maintaining a contact angle of more than 150° after 1000 cm of abrasion length and 80 tape-peeling repetitions. Molecular dynamics (MD) simulations and quantum mechanics calculations show that the improved mechanical resistance is attributed to the enhanced interfacial interaction between the EP@SH-SiO 2 coating and the underlying substrate induced by the epoxy adhesive. Electrochemical measurements in 3.5 wt% NaCl solution show the corrosion inhibition efficiency of the EP@SH-SiO 2 coating reaches up to 99.99%, and even after 8 days of immersion, the low frequency impedance modulus of the EP@SH-SiO 2 sample is still ∼1 order of magnitude higher than that bare aluminum, demonstrating excellent long-term corrosion protection. The diffusion behavior of the corrosive medium in the EP@SH-SiO 2 coating was revealed by MD simulation to support the experimental results. Additionally, the EP@SH-SiO 2 coating exhibits good chemical stability and hydrophobic repair properties. This work will provide a new perspective for the preparation and study of robust superhydrophobic aluminum for corrosion protection properties.
The evolution of an air core is an important phenomenon in hydrocyclones, which are sensitive to the operating conditions. The morphology of the air core in a hydrocyclone is studied experimentally, using a high-speed video camera and a noise analyzer. Three stages are observed during the increase of flow rate from 300 to 2,400 L per hour, which could be separated by both the noise measurement and the stability of the air core. The flow rate is found to have a nonmonotonic effect on the diameter of the air core, leading to a peak diameter. The influence of the overflow and underflow on the underflow-to-throughput ratio and air flow patterns is also investigated. It is found that the underflow-to-throughput ratio and air flow patterns are sensitive to the valve openings of both outlets.
Abstract In this work, a versatile strategy was proposed to fabricate translucent superhydrophobic coatings by spraying the suspension of modified SiO 2 /polydimethylsiloxane (PDMS) on various substrates. The wettability can be adjusted by changing the mass ratio of modified SiO 2 nanoparticles in the suspension. By optimizing the parameters in the spraying process, a superhydrophobic surface with a water contact angle of 164.1 ± 3.4° and a sliding angle of 4.2 ± 0.4° was achieved. As prepared translucent superhydrophobic SiO 2 /PDMS coatings show good mechanical durability, chemical stability, and self-cleaning performances.