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Noanix Corporation
[Korea]
Address:
83, Deokam-ro 35beon-gil, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do 361-856 Korea
Phone:
82-43-9050972
Contact name:
Brad Choi , CEO



Noanix Corporation
 

Hydrophobic Coatings

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Hydrophobic Coatings

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 Origin

Korea


Hydrophobic Coatings

The hydrophobic effect is the observed tendency of nonpolar substances to aggregate in aqueous solution and exclude water molecules. The word hydrophobic literally means "water-fearing," and it describes the segregation and apparent repulsion between water and nonpolar substances.The hydrophobic effect is responsible for the separation of a mixture of oil and water into its two components. The hydrophobic effect is also responsible for the stability of cell membranes, drives protein folding as well as the insertion of membrane proteins into the nonpolar lipid environment and finally stabilizes protein-small molecule interactions. Hence the hydrophobic effect is essential to medical device.

- Properties
Self-Cleaning/Anti-Dust, Prevent surface contamination, Organic pollution prevention, Water Contact Angle : 150

Teflon Coating

One of the most common processes for medical device coatings is te on coating. There are generally five steps to it:

1) Surface preparation/washing
2) Submersion of the device in a coating liquid(with a certain dwelling time in some instances)
3) Dip coating or Spray coating from the coating liquid, i.e. coating application/deposition
4) Drying and/or Curing of coating(Via heat)
5) Post processing, if any, especially with heat curing, this is a batch process. With proper system, the batches can be quite large, giving a decent effective through put.

- Applications

Medical equipment, textiles and all sorts of surfaces and substrates. However, the current state of the art for this technology is hindered in terms of the weak durability of the coating making it unsuitable for most applications. Newer engineered surface textures on stainless steel are extremely durable and permanently hydrophobic. Optically these surfaces appear a smooth matte surface but microscopically they consist of rounded depressions one to two microns deep over 25% to 50% of the surface.However, the hydrophobic coating was successful in noanix corporation.

Ex) Coated Surface

Parylene Coating

Powder Parylene in the vacuum condition is vaporised and coated onto the substrates in the form of polymer. It is a kind of CVD(Chemical-Vapor Deposition)

- Applications
Parylene Vaporisation → Decomposition → Evaporation

- Coating System Setting

  • Vaporiser: Parylene Dimer is vaporised with 80-175℃
  • Pyrolyser: Dimer in gas into Monomer with 650~690℃
  • Evaporation Chamber: Parylene in the form of polymer is coated on the target substrates

- Benefits

  • Hydrophobic, Chemically resistant
  • Low leakage current and low dielectric constant
  • A biostable, biocompatible, FDA approved
  • Dense pinhole free, with thickness above 1.4nm Coating without temperature load of the substrates as coating takes place at ambient temperature in a vacuum
  • Completely homogeneous surface
  • Stable to oxidation up to 350C(Parylene AF-4, SF,HT)
  • Low intrinsic thin film stress due to its room temperature deposition
  • Low coefficient of friction Very low permeability to gases
  • Highly corrosion resistant

Related Keywords: Hydrophobic Coatings


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