Silicone coating for medical devices

Organic silicones are playing an increasingly important role in the surface modification of next generation medical devices. The technique known as plasma-enhanced chemical vapour deposition (PECVD) of silicon dioxide coatings are seen widely as an enabling material technology for future products.

The technique is used to form an anti-microbial barrier, a primer to promote adhesion between stainless steel and proprietary coatings, and to create hydrophobic or hydrophilic surfaces. As a result, the medical device industry is aggressively investigating and applying plasma-applied coatings to products such as stainless steel guide wires, catheters, stents, and vascular surgical tools.

Plasma-enhanced chemical vapour deposition is a process used to deposit thin films from a gas state (vapours) to a solid state on a substrate. To deposit silicon dioxide using PECVD, organic silicones are often required as the feedstock, the best known are hexamethyldisiloxane (HMDSO) and tetramethyldisiloxane (TMDSO).

Aaron Baldwin, R&D project leader at MicroVention, said: “PECVD can take a product to the next level by addressing surface reaction issues such as biocompatibility or lubricity. It is a unique and eloquent way to deposit an enhance coatings because it allows you to tailor the surface while retaining the bulk material’s properties you need.”

Author
Justin Cunningham

This material is protected by MA Business copyright
See Terms and Conditions.
One-off usage is permitted but bulk copying is not.
For multiple copies contact the sales team.

 

Supporting Information
Do you have any comments about this article?
how to identify that the coating have uniform on the surface of catheters

Comment mohit kumar, 24/02/2018
Name
 
Email
 
Comments
 

Your comments/feedback may be edited prior to publishing. Not all entries will be published.
Please view our Terms and Conditions before leaving a comment.

© MA Business Ltd (a Mark Allen Group Company) 2018