Facile preparation of superhydrophobic and oleophobic surfaces via the combination of Cu(0)‐mediated reversible‐deactivation radical polymerization and click chemistry

Abstract

The fabrication of novel hydrophobic, superhydrophobic, and oleophobic surfaces on glass using nanosilica particles modified with polymer brushes prepared via surface initiated Cu(0)‐mediated reversible‐deactivation radical polymerization was demonstrated. Monomers including n‐butyl acrylate, 2,2,2‐trifluoroethyl methacrylate, and 1,1,1,3,3,3‐hexafluoroisopropyl acrylate were used to synthesize a series of nanosilica–polymer organic/inorganic hybrid materials. Products were analyzed using infrared spectroscopy, thermogravimetric analysis, scanning and transmission electron microscopy. The coated nanosilica showed core–shell structures that contains polymer brushes up to 67 wt %. The application of these particles for modifying surface wettability was examined by covalently attaching them to glass via a recently developed one‐pot “grafting to” methodology using “thio‐bromo click” chemistry. Atomic force microscopy topographic images show up to 25 times increase in roughness of the coated glass compared to blank glass sample. Contact angle measurements showed that nanosilica coated with PBA and PTFEM produced hydrophobic glass surfaces, while a superhydrophobic and oleophobic surface was generated using nanosilica functionalized with PHFIPA. This novel methodology can produce superhydrophobic and oleophobic surfaces in an easy and fast way without the need for tedious and time‐consuming processes, such as layer‐by‐layer deposition, high temperature calcination, and fluorinated oil infusion. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018

Surface Fluorination Modification and Anti-Biofouling Study of a pHEMA Hydrogel

“…After fluorination, a significant weight loss of pHEMA-F15 between 283 °C and 454 °C was due to the decomposition of the pHEMA substrate. The first weight loss of pHEMA-F15 started from 191 °C, which indicated that the thermal stability of pHEMA-F15 was decreased compared to pHEMA. , …”

“…The first weight loss of pHEMA-F15 started from 191 °C, which indicated that the thermal stability of pHEMA-F15 was decreased compared to pHEMA. 51,52 Surface Energy and Wettability. To further investigate the effects of surface fluorination, static contact angles of water and CH 2 I 2 on the original and fluorinated membranes were measured.…”

Azeotropic Binary Solvent System Containing Nonfluorinated Polymer-Grafted Silica Nanoparticles for the Fabrication of a Superhydrophobic Surface

“…Figure shows the weight loss curve of bare NP, Br-NP, and PCH-NP as a function of temperature. The weight percentages of the immobilized initiator and grafted polymer brushes were determined to be 4 and 60 wt %, respectively. , According to the product information provided by Sigma-Aldrich, the density of NP is 2.2 g/cm 3 and the size is 20 nm. The grafting density (ρ) was calculated by the following equation: …”

“…Figure shows the weight loss curve of bare NP, Br-NP, and PCH-NP as a function of temperature. The weight percentages of the immobilized initiator and grafted polymer brushes were determined to be 4 and 60 wt %, respectively. , According to the product information provided by Sigma-Aldrich, the density of NP is 2.2 g/cm 3 and the size is 20 nm. The grafting density (ρ) was calculated by the following equation: ρ = normalw normalt % normalp normalo normall normaly normalm normale normalr normalw normalt % normalN normalP normals D normalN normalP normals italicV normalN normalP normals N normalA M W 4 π r N P s 2 …”

Starch Janus Particles: Bulk Synthesis, Self-Assembly, Rheology, and Potential Food Applications

“…The surface-initiated polymerization protocol used here was based on a method developed by Enayati and Abbaspourrad. , First, 1 g unmodified amaranth starch was dispersed in 100 mL of acetonitrile (instead of water) in a beaker and sonicated for 15 min. Then, the beaker and its contents were heated in a water bath set at 60 °C [Figure A(i)].…”