Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 13, Pages 8737-8742Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b00748
Keywords
functional coating; antifogging; antimicrobial; quaternary ammonium compound (QAC); semi-interpenetrating polymer network (SIPN)
Funding
- research at Georgia Southern University from USDA/NIFA [2011-67022-30229]
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Dual-functional antifogging/antimicrobial polymer coatings were prepared by forming a semi-interpenetrating polymer network (SIPN) of partially quaternized poly(2-(dimethylamino)ethyl methacrylate-co-methyl methacrylate) and polymerized ethylene glycol dimethacrylate network. The excellent antifogging behavior of the smooth coating was mainly attributed to the hydrophilic/hydrophobic balance of the partially quaternized copolymer, while the covalently bonded, hydrophobic quaternary ammonium compound (5 mol % in the copolymer) rendered the coating strongly antimicrobial, as demonstrated by the total kill against both Gram-positive Staphylococcus epidermidis and Gram-negative Escherichia coil. The antimicrobial action of the SIPN coating was based on contact killing, without leaching of bactericidal species, as revealed by a zone-of-inhibition test. This type of dual-functional coating may find unique applications where both antimicrobial and antifogging properties are desired.
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