Electroanalytical Assessment of the Oxygen Permeability at the Gas‐Solid‐Liquid Interface in Polymer‐based Materials for Lens Applications. Issue 24 (6th November 2020)

• Record Type: Journal Article
• Authors: Jarboui, Ahmed; Holade, Yaovi; Mericq, Jean‐Pierre; Charmette, Christophe; Thami, Thierry; Biermans, Peter; Tingry, Sophie; Bouyer, Denis
• Is Part Of: ChemElectroChem. Volume 7:Issue 24(2020)
• Page Start: 4879
• Page End: 4888
• Publication Date: 2020-11-06
• Subjects: lens material -- electroanalysis -- oxygen permeability -- oxygen reduction reaction -- polymer membrane; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202001160
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: The design of efficient electrochemical setups to precisely and timely quantify the oxygen permeability, which dictates how the lens let O2 to reach the eye, is important for the development lens‐based materials. We report herein a home‐made electro‐analytical platform made of a 3D‐printed diffusion electrochemical cell to assess this parameter. The design overcomes edge effects and allows analysis under conditions similar to lens wear where the liquid is in contact to the inner surface while the gaseous O2 is in contact with the outer surface. The testing of three types of contact lens materials (flexible polymer, rigid polymer, and gel‐type) showed that the O2 permeability can be fairly well evaluated by the chronoamperometry study of oxygen reduction reaction. Under conditions similar to those of lens wear, our findings showed that the measurement error was 6 %, which offer an alternative to the classic gas‐to‐gas method for O2 permeability determination. Abstract : Dry lens or wet lens? O2 permeability of a lens material is different when measuring in dry or in wet conditions. The electrochemical method allows accurate measurements of O2 reduction under similar real lens wear conditions and offers a viable alternative to the classic time‐lag method operating in dry environment. Permeability depends on O2 affinity to the aqueous or non‐aqueous phase inside different type of polymer materials.