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A kind of anti-fog coating based on zwitterionic polyelectrolyte copolymer and its preparation method

A zwitterion, anti-fog coating technology, applied in the direction of the coating, to achieve the effect of strong adhesion, good film formation and good water resistance

Inactive Publication Date: 2020-03-17
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • A kind of anti-fog coating based on zwitterionic polyelectrolyte copolymer and its preparation method
  • A kind of anti-fog coating based on zwitterionic polyelectrolyte copolymer and its preparation method
  • A kind of anti-fog coating based on zwitterionic polyelectrolyte copolymer and its preparation method

Examples

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Embodiment 1

[0036] (1) Synthesis of poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate)-b-polysulfobetaine methacrylate:

[0037] Dissolve dimethylaminoethyl methacrylate, trifluoroethyl methacrylate, 4-cyanopentanoic acid dithiobenzoic acid, and azobisisobutyronitrile in toluene at a molar ratio of 150:20:1:0.25 , configured into a 50% solution, stirred into a homogeneous solution, after three freeze-thaw cycles to remove oxygen in the system, placed in a 70°C oil bath for 10 hours, after the reaction, the crude product was precipitated with ice n-hexane for 5 times, placed in Dry in a vacuum oven for 24 hours to obtain poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate).

[0038] Dissolve azobiscyanovaleric acid, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate), sulfobetaine methacrylate in a molar ratio of 0.25:1:30 in In isopropanol / water (1:1, v / v) solution, configure it as a 20% solution. After three freeze-thaw cycles to remove...

Embodiment 2

[0051] (1) Synthesis of poly(dimethylaminoethyl methacrylate-co-hexafluorobutyl methacrylate)-b-polysulfobetaine methacrylate:

[0052] Dissolve dimethylaminoethyl methacrylate, hexafluorobutyl methacrylate, 4-cyanopentanoic acid dithiobenzoic acid, and azobisisobutyronitrile in toluene at a molar ratio of 150:20:1:0.25 , configured into a 50% solution, stirred into a homogeneous solution, after three freeze-thaw cycles to remove oxygen in the system, placed in an oil bath at 70°C for 10 hours, after the reaction, the crude product was precipitated with ice n-hexane for 3 times, placed in Dry in a vacuum oven for 48 hours to obtain poly(dimethylaminoethyl methacrylate-co-hexafluorobutyl methacrylate).

[0053] Dissolve azobiscyanovaleric acid, poly(dimethylaminoethyl methacrylate-co-hexafluorobutyl methacrylate), sulfobetaine methacrylate at a molar ratio of 0.25:1:40 in In isopropanol / water (1:1, v / v) solution, configure it as a 20% solution. After three freeze-thaw cycles t...

Embodiment 3

[0066] (1) Poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate)-b-poly 3-[2-(methacryloyloxy)ethyl]dimethylammonium propionate Synthesis:

[0067] Dissolve dimethylaminoethyl methacrylate, trifluoroethyl methacrylate, 4-cyanopentanoic acid dithiobenzoic acid, and azobisisobutyronitrile in toluene at a molar ratio of 200:35:1:0.25 , configured into a 40% solution, stirred into a homogeneous solution, after three freeze-thaw cycles to remove oxygen in the system, placed in an 80°C oil bath for 8 hours, after the reaction, the crude product was precipitated 4 times with ice n-hexane, placed in Dry in a vacuum oven for 24 hours to obtain poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate).

[0068] Azodicyanovaleric acid, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate), 3-[2-(methacryloyloxy)ethyl]dimethylammonium Propionate is dissolved in isopropanol / water (1:1, v / v) solution at a molar ratio of 0.25:1:50 to form a 30% solu...

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Abstract

The invention discloses an antifog coating based on zwitter-ion polyelectrolyte copolymer and a preparation method of the antifog coating. The poly(dimethylaminoethyl methacrylate-co-fluoroalkyl methacrylate)-b-poly(zwitter-ion) electrolyte segmented copolymer is synthesized by virtue of a reversible addition-fragmentation chain transfer polymeric method, oligoethylene glycol dimethacrylate is adopted as a cross-linking agent, and the synthesized segmented copolymer is adopted as a main component to prepare the coating by virtue of an ultraviolet curing method. A silane coupoling agent is usedfor modifying a base material, and a network structure is established by utilizing sulfydryl-alkene click reaction. The hydrophilic poly-amphoteric electrolyte in the coating enables the coating to have excellent antifog performance, the hydrophobic fluoro methacrylate not only can be used for adjusting the hydrophilic-hydrophobic balance, but also can improve the water resistance and stability of the coating. The prepared coating is relatively low in cost, simple in process, good in coating film forming performance, high in water-resistant stability, capable of realizing long-acting antifogeffect, and good in practical application value.

Description

technical field [0001] The invention belongs to the field of polymer coating materials, and in particular relates to an anti-fog coating based on zwitterionic polyelectrolyte copolymer and a preparation method thereof. Background technique [0002] Transparent objects such as glass are widely used in modern daily production and life. Surface fogging often occurs on lenses of various instruments, bathroom mirrors, glasses, etc. Therefore, it is of great practical significance to prepare a transparent and efficient anti-fog coating. The hydrophilic anti-fog coating quickly absorbs the droplets attached to the surface of the substrate and spreads them into a water film, thereby reducing light scattering and realizing the anti-fog function. Sun Junqi et al prepared a self-repairable anti-fog and anti-frost multifunctional coating by layer-by-layer self-assembly of polyethyleneimine, hyaluronic acid and polyacrylic acid blends (Wang Y, Li T, Li S, Sun J. Antifogging and frost-re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C09D4/06C08F220/34C08F220/24C08F220/36
CPCC08F220/34C09D4/06C08F220/24C08F220/36
Inventor 袁晓燕白珊李晓晖朱孔营任丽霞赵蕴慧
Owner TIANJIN UNIV