Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Technologies  > Tunable surface chemistry and wettability...

Thursday, 09 July 2020
pdf
Raw materials & technologies, Technologies

Tunable surface chemistry and wettability of LDPE substrate

Wednesday, 27 May 2020

Scientists have investigated the surface chemistry and wettability of octafluorocyclobutane and acrylic acid copolymer combined LDPE substrate by pulsed plasma polymerisation.

The substrate-dependent wettability for flat substrate persisted for longer than 8 weeks, which demonstrates wetting stability for ultrathin coatings. Image source: illionPhotos.com– stock.adobe.com (symbol image).
The substrate-dependent wettability for flat substrate persisted for longer than 8 weeks, which demonstrates wetting stability for ultrathin coatin...

Octafluorocyclobutane and acrylic acid (C4F8-co-AA) have been plasma copolymerised onto low-density polyethylene (LDPE) and glass slides under various pulsation periods of radio frequency pulsed plasma. The surface wettability of plasma polymer coating is traditionally considered as a substrate-independent property.

The high concentration of the carboxylic acid functional groups gave rise to hydrophilicity via lowering duty cycle, and substrate impact gave rise to hydrophobicity for ultrathin coatings.

Wetting stability for ultrathin coatings

The X-ray photoelectron spectroscopy and coating thickness measurements confirmed that the sudden increase in water contact angle for the lower duty cycle is influenced by the hydrophobic substrate for ultrathin polymer coatings. It was highlighted that the precise control over the surface wettability is attained by tuning the plasma parameters. The substrate-dependent wettability for flat substrate persisted for longer than 8 weeks, which demonstrates wetting stability for ultrathin coatings.

The paper has been published in Journal of Coatings Technology and Research volume 17, 2020.

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register