Polymer brush modified transparent anti-fog patch and preparation method thereof

Abstract

The invention provides a polymer brush modified transparent anti-fog patch and a preparation method thereof, and belongs to the technical field of anti-fog materials. The polymer brush modified transparent anti-fog patch comprises a transparent polymer base film, a hydrophilic polymer brush layer located on one side of the transparent polymer base film and an organic binder layer located on the other side of the transparent polymer base film. And the hydrophilic polymer brush layer grows on the surface of the transparent polymer base film in a grafting manner in a photo-initiation manner. According to the invention, the hydrophilic polymer brush layer is generated through photo-initiated surface free radical polymerization, and the hydrophilic polymer brush layer is connected with the transparent polymer base film through covalent bonds, so that the bonding strength is high, and the problem that the anti-fog performance is reduced due to loss of a hydrophilic polymer under the hydration effect can be avoided; the grafted hydrophilic polymer brush chain segment can quickly absorb water mist and hydrate and form a transparent water film to generate an anti-fog effect, and the hydrophilic polymer brush layer has excellent mechanical wear resistance.

Description

technical field [0001] The invention relates to the technical field of anti-fog materials, in particular to a transparent anti-fog patch modified by a polymer brush and a preparation method thereof. Background technique [0002] On the surface of transparent optical objects, such as spectacle lenses, medical goggles, bathroom mirrors, face shields, automobile glass, and medical device endoscopes, during daily use, due to temperature differences, the gas is easy to condense into small water droplets on the surface of the object, and then fogging occurs Phenomena, blocking the observation line of sight, and seriously affecting its normal use. [0003] In response to the above-mentioned fogging phenomenon, there have been researches on anti-fog products at home and abroad and put them into use. For example, anti-fog liquid relies on the rapid volatilization of solvents to promote active molecules or polymers to form a hydrophilic assembly film on the surface of the object, the...

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Problems solved by technology

For example, anti-fog liquid relies on the rapid volatilization of solvents to promote active molecules or polymers to form a hydrophilic assembly film on the surface of the object, thereby achieving the anti-fog effect, but it has the disadvantages of poor wear resistance and long-term anti-fog stability; For another example, anti-fog coating is a coating formed on the surface of optical devices by physical or chemical coating methods. It has good wear resistance and anti-fog long-term stability, but users cannot remove and replace it by themselves, and the convenience of use is poor.

[0004] The anti-fog patch based on the flexible base film has the advantages of good convenience, such as patent CN201320061221.0 provides an anti-fog film for swimming goggles, CN201711288812.0 provides an anti-fog based on anti-fog coating However, the anti-fog layer of these films is attached to the surface of the base film by physical brushing, and its bonding strength with the base film is poor, resulting in poor long-term anti-fog performance and mechanical wear resistance in the hydration state. good

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