Copper capillaries with lubricant-infused walls: fabrication and drag reduction performance

Multifunctional Oil‐Entangled Matrix Spray for Maritime Sustainability

“…The novel OEMs coating developed in this study proposes a significant advancement in surface treatment for promoting the sustainability of marine vehicles. Unlike previous metastable coatings such as SLIPS and SHS, [ 25–27 ] OEMs coating shows outstanding durability, maintaining its performance for up to 48 h under high shear flow. Furthermore, the sprayable method of OEMs allows it to form a microscale (≈ 15 µm, Figure S22, Supporting Information) thick coating with nanoscale roughness on substrates and a slippery interface with a hysteresis angle and roll‐off angle of 9 o and 8 o , respectively, making it an effective coating suitable for both large‐scale and delicate surfaces.…”

“…Inspired by the skin of marine creatures, [22,23] oil-entangled matrix spray (OEMs) was developed using polydimethylsiloxane (PDMS, (C 2 H 6 OSi) n ) and mineral oil (mixture of straight and branched chain paraffinic, naphthenic and aromatic hydrocarbons with carbon number of [15][16][17][18][19][20][21][22][23][24][25] to provide a long-lasting slippery interface (Figure 1a). PDMS is specially selected as the matrix to retain oil due to its excellent mechanical and optical properties, high affinity to oils and different substrates, [39,40] and good biocompatibility.…”

“…[23,24] Even under laminar flow, the maximum effective time of SHPs and SLIPSs is only tens of hours due to their metastable interface. [25][26][27] RMSs can reduce drag by up to 28% [28] by hampering the fluctuating crossflow component but are limited by the specific working range, [29] whereas, in some circumstances, the increased surface area can increase corrosion/fouling rates. [30] In nature, marine creatures have developed unique mechanisms to reduce shear stress to overcome the limitations of the above-mentioned functional surfaces.…”