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Novel Antimicrobial Coating on Silicone Contact Lens Using Glycidyl Methacrylate and Polyethyleneimine Based Polymers
Author(s) -
Pillai Suresh Kumar Raman,
Reghu Sheethal,
Vikhe Yogesh,
Zheng Hou,
Koh Chong Hui,
ChanPark Mary B.
Publication year - 2020
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.202000175
Subject(s) - methacrylate , contact lens , coating , antimicrobial , materials science , polymer , glycidyl methacrylate , ethylene glycol dimethacrylate , monomer , staphylococcus aureus , chemistry , bacteria , nanotechnology , composite material , organic chemistry , methacrylic acid , medicine , biology , genetics , ophthalmology
Contact lenses are medical devices commonly used to correct refractive errors and to maintain ocular health. Microorganisms such as bacteria that grow on the lens surface cause irritation to the eyes and can even cause loss of vision. In this paper, two different coating strategies are employed to form an efficient antimicrobial coating on contact lenses. In the first method, a presynthesized copolymer of polyethyleneimine‐ graft ‐polyethylene glycol methacrylate (PEI‐PEGMA) is used and the coated lenses show antimicrobial activity (in vitro) against methicillin‐resistant Staphylococcus aureus (MRSA) bacteria with killing efficacy >99.99% and log reduction of 5.1 and proxy host cell viability of 79%. In the second method, commercially available monomers/polymers such as glycidyl methacrylate (GMA), sulfobetaine methacrylate, and polyethyleneimine are used. A typical formulation consisting of 1% GMA shows antibacterial activity against MRSA with killing efficacy >99.99% and log reduction of 6.3. Proxy host cell viability for the coated lenses is found to be 90% indicating that the coating is nontoxic. Antibacterial coating reported here is very effective in killing gram‐positive bacteria such as MRSA and S. aureus . The second method using commercially available monomers/polymers involving a simple coating procedure is also easily scalable.