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Transparent Grafted Zwitterionic Copolymer Coatings That Exhibit Both Antifogging and Self-Cleaning Properties
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posted on 2018-12-19, 09:17 authored by Qiaohong Liu, Jason LocklinIn this work, we have investigated
a zwitterionic copolymer
that demonstrates outstanding antifogging and self-cleaning properties.
These polymer coatings are photochemically grafted to substrates containing
C–H bonds with rapid kinetics and form a robust polymer networks
on plastic and alkyl-modified glass surfaces. The copolymers consist
of a zwitterionic monomer, which provides high hydrophilicity, and
a benzophenone moiety that produces a densely cross-linked network.
The optical clarity of the substrates is not impacted by the polymer
coating and even slightly improved due to the lower refractive index
of the polymer relative to glass. The antifogging and self-cleaning
capabilities were determined by a series of experiments, where the
optical transmittance of substrates modified with copolymer coatings
was excellent under both hot and cold fogging conditions. Additionally,
surfaces contaminated with oil are easily cleaned by simply submerging
the coatings in water. Moreover, the coatings exhibit excellent chemical
and mechanical resistance and maintain antifogging properties after
abrasion testing in the presence of either chemical detergents or
common household cleaners.
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polymer coatingcross-linked networkfogging conditionsalkyl-modified glass surfacesantifogging propertieshousehold cleanerspolymer coatingszwitterionic copolymerchemical detergentscoatings exhibitself-cleaning capabilitiesabrasion testingcopolymer coatingsSelf-Cleaning Propertiesbenzophenone moietyTransparent Grafted Zwitterionic Copolymer Coatingssubstratezwitterionic monomerpolymer networksself-cleaning properties
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