Aligned ZnO nanorod arrays films were grown on LiNbO3 substrates by aqueous growth, and subsequently rendered superhydrophobic with RF sputtered coated Teflon. The as-prepared surface exhibits superhydrophobicity with a water contact angle (CA) of 154.5. After 2 hours of UV irradiation on the surface, the surface wettability was approaching hydrophilic state; CA was measured to be 113. This stu...

We theoretically investigate the relations among electrorheological (ER) effects of ER fluids, zero-field dispersity of colloidal particles and particle wettability, and find that well dispersed particles resulting from particle wettability have much stronger attraction than those aggregated into different clusters. We reveal that, to achieve ER effects, besides improving dielectric properties ...

Abstract Higher oil recovery after waterflood in carbonate reservoirs is attributed to increasing water wettability of the rock that turn relies on complicated surface chemistry. In addition, calcite mineral reacts with aqueous solutions and can alter substantially composition injected by dissolution. Carefully designed chemical and/or brine flood compositions laboratory may not remain intact w...

Recovery Factor is an important parameter in determining commercial viability of the oil Reservoirs. Wettability is a major factor that affects oil Recovery. Therefore, changing rock wettability may enhance oil recovery. In this paper, the effect of polysilicon nanoparticles on wettability change of Iranian carbonate reservoir is investigated. To assess this, hydrophilic changes of carbonate ro...

• Numerial simulation of spreading drops on a wettable surface. • We discuss the effect of the main parameters (density, viscosity, surface tension, drop radius and wettability). • Power law evolutions observed in experiments (t/2, t/10) are recovered and discussed. • The combined effect of viscosity and wettability has a significant effect on the spreading.

Plasma treatment of particles offers to tailor macroscopic powder properties like wettability, flowability or compactibility. Plasma activation normally leads to an enhanced wettability and the deposition of SiOx-like nanostructures on the substrate particle surface increases the flowability and compactibility. These different functionalities are investigated and compared for the polymer HDPE (...

Finding cost-efficient ways of increasing oil production with a low carbon footprint is the new challenge for petroleum industry that wants to meet net-zero emission goals by 2050. Smart water injection an EOR process increases and delays breakthrough wettability alteration. Seawater smart in chalk reservoirs, being especially effective at high temperatures. Different studies have shown effecti...

microfabrication applications, it is widely used to transfer the designed patterns from an etching mask to the substrate. When the sample is immersed into the etching bath, the etchant only contacts and reacts with the substrate surfaces where are uncovered by the etching mask. The suitable materials for the mask can be polymers or other materials such as photoresist, SU-8,SiO2 andSi3N4, which ...

The flame plasma treatment studied in this thesis was able to oxidize the surface of Polydimethylsiloxane (PDMS) in a fraction of a second. It was found to be a much faster way to modify PDMS surface wettability than the current technologies. The surface wettability of Polydimethylsiloxane (PDMS) treated with flame plasma was studied. The surface wettability was characterized by contact angle m...