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Friction studies of hydrogel contact lenses using AFM: non-crosslinked polymers of low friction at the surface

Paper ID Volume ID Publish Year Pages File Format Full-Text
13788 903 2001 10 PDF Available
Title
Friction studies of hydrogel contact lenses using AFM: non-crosslinked polymers of low friction at the surface
Abstract

The surface of soft contact lenses made of crosslinked poly(2-hydroxyethyl methacrylate), pHEMA, has been investigated with atomic force microscopy in contact mode. The friction force and adhesive force measurements were able to differentiate the non-crosslinked pHEMA chains from the surface of the crosslinked pHEMA networks. These non-crosslinked pHEMA chains at the surface were anchored to the crosslinked pHEMA network, most likely by entanglement and their surfaces were about 2–4 nm higher than the surrounding surface in a dehydrated state. In saline solution, the surface friction and adhesive force of the contact lens were significantly reduced compared to those measured for the surface-dehydrated contact lens.

Keywords
Contact lens; Hydrogel; Poly(2-hydroxyethyl methacrylate); AFM; Friction
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Friction studies of hydrogel contact lenses using AFM: non-crosslinked polymers of low friction at the surface
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biomaterials - Volume 22, Issue 24, 15 December 2001, Pages 3285–3294
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us