Superhydrophobic adhesive surface on titanate nanotube brushes through surface modification by capric acid

Abstract

A superhydrophobic adhesive surface is applied to titanate nanotube (TNT) brushes through surface modification using capric acid. Hydroxyl groups on the TNT brushes are reacted with carboxylic acids via esterification using a chemical vapor deposition method at 110°C. The alignment of the titanate nanostructures and the surface modification with capric acid resulted in a hydrophobic surface. The hydrophobicity increases with surface modification time; the contact angle, h CA , increases from 0°to 152°. After 4 h modification, the surface shows superhydrophobicity with water adhesion ability. The use of carboxylic acids as modifiers offers advantages that include low cost, environmental compatibility, and non-toxicity and is capable of adapting TNT-based functional interfaces toward a variety of applications. Graphical Abstract

Thermo-responsive wettability via surface roughness change on polymer-coated titanate nanorod brushes toward fast and multi-directional droplet transport

“…Vertically-aligned titanate nanorods on a titanium plate (TNR brush) were employed as inorganic nanostructures, that was prepared according to the previously reported procedure. [26][27][28] The surface of TNR brush was modied with octyltrimethoxysilane (OTMS) by chemical vapor deposition in order to improve a chemical interaction with paraffin. Then, paraffin (melting point at 42-44 C) dissolved in isooctane was spincoated on the OTMS-modied TNR brush to obtain a paraffincoated TNR brush (hereaer the sample is denoted as paraffin/TNR brush).…”

Thermo-Responsive Wettability via Surface Roughness Change on Polymer-Coated Titanate Nanorod Brushes Toward Fast and Multi-Directional Droplet Transport

“…Vertically-aligned titanate nanorods on a titanium plate (TNR brush) were employed as inorganic nanostructures, that was prepared according to the previously reported procedure. [26][27][28] The surface of TNR brushes was modified with octyltrimethoxysilane (OTMS) by chemical vapor deposition in order to improve a chemical interaction with paraffin. Then, paraffin (melting point at 42 -44 °C) dissolved in isooctane was spin-coated on the OTMS-modified TNR brush to obtain a paraffin-coated TNR brush (hereafter the sample is denoted as Paraffin/TNR brush).…”