Hydrophilic Coating
Term: Hydrophilic Coating
Category: Coatings
Definition: Hydrophilic coatings are thin surface layers that attract and hold water. They are made from hydrophilic polymers, such as polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), or polyacrylamide. These polymers can form hydrogen bonds with water, so when the coating meets moisture, it soaks up water and becomes highly hydrated. That wet surface lowers friction, prevents proteins from sticking, and makes the material biocompatible.
How it Works: Hydrophilic coatings are water-loving layers that are attached to a material’s surface. When they touch water or body fluids, they soak up the liquid and swell. This creates a thin, slippery film that lowers friction and makes inserting devices easier and less irritating. The wet layer also acts as a barrier that helps keep dirt and bacteria from sticking to the surface.
Common Uses:
- Medical devices such as catheters, guidewires, and stents
- Contact lenses and ophthalmic devices
- Diagnostic tools and biosensors
- Drug delivery systems
Related Content and Resources:
Hydrophilic Coatings for Medical Devices: Intro, Benefits & Uses
Hydrophilic Coatings For Medical Device Substrates
The Use of Hydrophilic Coatings With Other Medical Coatings
