A kind of anti-fog/anti-frost coating based on cationic polyelectrolyte copolymer and preparation method thereof

A cationic poly-electrolyte technology, applied in the direction of coating, etc., can solve the problems of reducing the actual application value of the coating, and it is difficult to ensure the long-term anti-fog and anti-frost properties of the coating, so as to achieve good anti-fog effect and long-term effect Sexuality, the effect that the strength is high

Inactive Publication Date: 2020-05-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When water droplets condense on the surface of the coating, the hydrophilic polymer coating realizes anti-fog / anti-frost through interactions such as hydrogen bonds between the hydrophilic polymer and water molecules (Li Y, Fang X, Wang Y, Ma B, SunJ. Highly transparent and water-enabled healable antifogging and frost-resisting films based on poly(vinyl alcohol)–nafion complexes. Chemistry of Materials, 2016,28(19):6975-6984), but at the same time due to its Water-based, it is difficult to guarantee the long-term anti-fog and anti-frost performance of the coating, which reduces the actual application value of the coating

Method used

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  • A kind of anti-fog/anti-frost coating based on cationic polyelectrolyte copolymer and preparation method thereof
  • A kind of anti-fog/anti-frost coating based on cationic polyelectrolyte copolymer and preparation method thereof
  • A kind of anti-fog/anti-frost coating based on cationic polyelectrolyte copolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036](1) Poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate)-b-cationic polyelectrolyte (R=Cl - ) Synthesis:

[0037] Weigh the medicine according to the molar ratio of dimethylaminoethyl methacrylate, trifluoroethyl methacrylate, 4-cyanopentanoic acid dithiobenzoic acid and azobisisobutyronitrile as 150:20:1:0.2, Configure it as a 50% toluene solution, remove the oxygen in the system, and place it in a 70°C oil bath for 10 hours. After the reaction, quench it with liquid nitrogen, precipitate it in ice-n-hexane for 5 times, and dry it in a vacuum oven. After 24h, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate) was obtained.

[0038] According to the molar ratio of azodicyanovaleric acid, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate), methacryloyloxyethyltrimethylammonium chloride is 0.25:1 :30 Weigh the medicine, make it a 20% isopropanol / water (1:1, v / v) solution with a mass fraction, after the oxygen in the sys...

Embodiment 2

[0050] (1) Poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate)-b-cationic polyelectrolyte (R=SO 4 2- )Synthesis:

[0051] Weigh the medicine according to the molar ratio of dimethylaminoethyl methacrylate, trifluoroethyl methacrylate, 4-cyanopentanoic acid dithiobenzoic acid and azobisisobutyronitrile as 50:10:1:0.2, Configured as a 20% toluene solution, after removing the oxygen in the system, put it in a 65°C oil bath for 24 hours, after the reaction, quench it with liquid nitrogen, precipitate in ice n-hexane for 3 times, and dry it in a vacuum oven After 48 hours, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate) was obtained.

[0052] According to the molar ratio of azodicyanovaleric acid, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate), methacryloyloxyethyltrimethylammonium chloride is 0.25:1 :10 Weigh the medicine, make it into 10% isopropanol / water (1:1, v / v) solution with a mass fraction, after the oxygen in ...

Embodiment 3

[0064] (1) poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate)-b-cationic polyelectrolyte (R=I - ) Synthesis:

[0065] Weigh the medicine according to the molar ratio of dimethylaminoethyl methacrylate, trifluoroethyl methacrylate, 4-cyanopentanoic acid dithiobenzoic acid and azobisisobutyronitrile as 300:60:1:0.2, Configure it as a 50% toluene solution, remove the oxygen in the system, and place it in an oil bath at 80°C to react for 8 hours. After the reaction, quench it with liquid nitrogen, precipitate it in ice n-hexane for 4 times, and dry it in a vacuum oven. 36h, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate) was obtained.

[0066] According to the molar ratio of azodicyanovaleric acid, poly(dimethylaminoethyl methacrylate-co-trifluoroethyl methacrylate), methacryloyloxyethyltrimethylammonium chloride is 0.25:1 :200 Weigh the medicine, make it into 50% isopropanol / water (1:1, v / v) solution with a mass fraction, after exhausting ...

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Abstract

The invention relates to an anti-fog / anti-frost coating based on a cationic polyelectrolyte copolymer, and a preparation method of the anti-fog / anti-frost coating. The anti-fog / anti-frost coating is prepared from 3-50% of poly(dimethylaminoethyl methacrylate-co-fluoroalkyl methacrylate)-b-cationic polyelectrolyte, 0.3-20% of oligo-ethylene glycol dimethacrylate, 0.05-0.5% of photoinitiator and thebalance of solvent. 2-(dimethylamino)ethyl methacrylate, fluoroalkyl methacrylate and methacryloyloxyethyl trimethyl ammonium chloride are used as raw materials; a block polymer is synthesized by using a reversible addition-fragmentation chain transfer polymerization method; polymers of different countra-ions are obtained by means of ion exchange and are taken as main components of the coating; the oligo-ethylene glycol dimethacrylate is used as a crosslinking agent, and a film is formed by cross-linking and solidifying the oligo-ethylene glycol dimethacrylate and a substrate by means of ultraviolet (UV) light. The prepared coating realizes a hydrophilic-hydrophobic balance, has good stability under the premise of guaranteeing excellent anti-fog / anti-frost performance, and realizes anti-fog / anti-frost long-term effect.

Description

technical field [0001] The invention belongs to the field of polymer coating materials, in particular to an anti-fog / anti-frost coating based on a cationic polyelectrolyte copolymer and a preparation method thereof. Background technique [0002] The phenomenon of fogging and frosting in nature seriously reduces the transparency of transparent substrates, thereby affecting their use. For example, the fogging of optical devices and medical equipment lenses will seriously affect the line of sight and even become a safety hazard; the fogging of agricultural films Therefore, it is imperative to solve the fogging phenomenon on the surface of transparent substrates. At present, the main anti-fog / anti-frost methods include electrothermal method and coating anti-fog method. Compared with the former, the latter has more application prospects because of its convenient use, simple equipment, and low cost. When water droplets condense on the surface of the coating, the hydrophilic polym...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C09D4/06C09D153/00C08F290/00C08F220/34C08F8/44
CPCC08F8/44C08F293/00C08L2201/10C09D4/06C09D153/00C08L71/02C08F220/34
Inventor 袁晓燕白珊李晓晖朱孔营任丽霞赵蕴慧
Owner TIANJIN UNIV
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