Coatings, Surfaces & Membranes – Page 8

Optical band gap energy of Er-doped TiO2 thin films

Lee D.Y., Lee I.G., Park J.H., Kim Y.H., Lee D.Y., Lee I.G., Daelim University, KR

Er-doped TiO2 thin films(0~1.0 mol% Er) having a thickness of 400 to 1200 nm were spin coated onto FTO glass substrate by varying PVP concentration. The optical properties of thin films was examined by glancing [...]

Nanopatterning planar and non-planar mold surfaces for a polymer replication

Cech J., Pranov H., Kofod G., Matschuk M., Murthy S., Cheong L.Y., Taboryski R., Technical University of Denmark, DK

We present a novel process to create nanopatterns on planar and non-planar polymer replication tools, such as metallic molds for an injection molding. Such tools with nanopatterned cavities then allow affordable mass production of nanopatterned [...]

Nanostructured Coatings, Surfaces & Films

Durability of a superhydrophobic nanocomposite coating under extended replicated rain impact

Davis A., Yeong Y.H., Steele A., Bayer I., Loth E., DeCombarieu G., University of Virginia, US

The objective of this study was to test the mechanical durability of a polyurethane/organoclay nanocomposite modified with perfluoroalkyl methacrylic copolymer in conditions that replicate extended rain impact. Samples were impacted with 1.4 mm droplets at [...]

Improving Resistance to Foreign Material for Hearing Instruments

Lin W., Starkey Labs, Inc., US

One of the recurring problems with hearing aids is the frequent exposure to moisture, wax and other foreign materials that can degrade and eventually hinder their performance. This issue may be exacerbated as the demographics [...]

Injection molded superhydrophobic surfaces

Søgaard E., Smistrup K., Taboryski R., Technical University of Denmark, DK

The Lotus effect is used as inspiration for the fabrication of injection molded (IM) hierarchical polymer surfaces with self-cleaning properties. IM is a widespread method for the fabrication of plastic items. Surface functionalization is traditionally [...]

An Electrolytic Reaction to Resist Saturation on Conductive Superhydrophobic Nanocomposites

Cheek J., Steele A., Loth E., University of Virginia, US

The following abstract investigates superhydrophobic nanocomposite surfaces that are continuously submerged in water. Unfortunately, the surfaces lose superhydrophobic functionality under constant contact with water. Until recently, there has been little analysis on this performance behavior. [...]

Impact of spray-casting height and pressure on durability and superhydrophobicity of nanocomposite coatings

Yeong Y.H., Davis A., Steele A., Loth E., Bayer I., De Combarieu G., Mechanical & Aerospace Engineering, University of Virginia, US

Recently, researchers introduced a new technique to fabricate superhydrophobic coatings by spray-casting polymer-nanoparticle suspensions using an air-atomizing nozzle. Upon thermosetting, the deposited polymer networks crosslink to form a durable, superhydrophobic nanocomposite coating. However, while the [...]

Surface Characterization of Nanoparticle Coated Paperboard

Stepien M., Saarinen J.J., Teisala H., Tuominen M., Aromaa M., Kuusipalo J., Mäkelä J.M., Toivakka M., Abo Akademi University, FI

Both surface topographical and chemical composition of nanoparticle coated paperboard was characterized to explain observed differences in surface wettability. TiO2 particles induce superhydrophobicity with water contact angle (CA) of 161° whereas SiO2 particles result in [...]

Clay Polyimide Composite Film with Low CTE and High Water Vapor Barrier Property

Ebina T., Kawasaki K., Nakamura T., Yoshida M., Hayashi H., Hayashizaka N., Yamashita T., Yamamoto T., Misyou D., Bando S., Hayashizaka N., Umeda Y., National Institute of Advanced Industrial Science and Technology, JP

A new clay polymer composite film was prepared by mixing specially processed non-swelling clay and polyimide at an optimal ratio. The newly developed film (80 µm thick) was heat-resistant at 450°C and showed very little [...]