Development of uv-curable, hydrophilic gel networks for soft contact lens manufacture

Shane McGrath, Austin B. Coffey, Phillip R. Walsh, Niall E. Murphy

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

The development of functionally enhanced novel hydrogels for contact lens applications necessitates evaluation with a view towards optimising processability and materials selection for high volume manufacture. Six hydrophilic monomer resins (F1-F6) were successfully formulated and photo-polymerised, using in-house capabilities, to produce hydrogel contact lenses. A suite of characterisation methods were developed to determine the effects of resin composition on material curing performance and functional lens characteristics. By monitoring degrees of conversion and polymerisation kinetics for each formulation, enhanced curing performance was demonstrated with photoinitiator concentrations from 0.02mmol to 0.04mmol producing a 4.3% increase in the degree of conversion reached. The addition of a crosslinking agent was found to considerably increase the rate reaction in the early stages while enhancing crosslink density. Mechanical lens properties were shown to improve, while equilibrium water content (EWC) decreased, for lenses of enhanced crosslink density. The reported findings are expected to contribute significantly to current scientific knowledge and industrial practices in the field.

Original languageEnglish
Title of host publicationSociety of Plastics Engineers - EUROTECH 2013
PublisherSociety of Plastics Engineers
Pages366-371
Number of pages6
ISBN (Print)9781632665324
Publication statusPublished - 2013
EventEUROTECH 2013 - Lyon, France
Duration: 04 Jul 201305 Jul 2013

Publication series

NameSociety of Plastics Engineers - EUROTECH 2013

Conference

ConferenceEUROTECH 2013
Country/TerritoryFrance
CityLyon
Period04/07/201305/07/2013

Keywords

  • Hydrogels
  • Photopolymerisation
  • Soft contact lenses

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