Hydrogel coating and production method and application thereof

A technology of hydrogel and coating, applied in the direction of coating and so on

Active Publication Date: 2019-10-25
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, the current conventional anti-icing methods generally have some limitations, so it is urgent to develop an anti-icing method that is easy to construct, low energy consumption, high efficiency, and pollution-free.

Method used

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  • Hydrogel coating and production method and application thereof
  • Hydrogel coating and production method and application thereof
  • Hydrogel coating and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] The preparation method of embodiment 1 hydrogel coating

[0107] The hydrogel coating is obtained by chemical cross-linking on the basis of polyelectrolyte multilayer films. The preparation of polyelectrolyte multilayer films adopts the method of layer-by-layer self-assembly, using the electrostatic attraction and hydrogen bonding of polyelectrolytes to make it fit together.

[0108] Prepare polyethyleneimine, poly(4-styrene sulfonate sodium) (PSS), and polyallylamine hydrochloride (PAH) solutions with a concentration of 1 g / L in deionized water, and then add Sodium chloride, so that the concentration is 0.5mol / L. Use deionized water to prepare phosphate buffer solutions with pH=2.5, 5.0, and 8 concentrations of 0.01 mol / L, and use 0.1 mol / L hydrochloric acid solution and sodium hydroxide solution to control and adjust the pH and ionic strength. Polymethacrylic acid (PMAA) and polyvinylpyrrolidone (PVPON) solutions with a concentration of 0.5 g / L were prepared respect...

Embodiment 2

[0117] Embodiment 2 The freezing temperature of water droplets on the surface of the hydrogel coating

[0118] Prepare 7 kinds of 8 layers of coatings " (PMAA) according to the mode of embodiment 1 8 -Li", "(PMAA) 8 -NH 4 ","(PMAA) 8 -Ag", "(PMAA) 8 -Cu", "(PMAA) 8 -Ca", "(PMAA) 8 -Fe", "(PMAA) 8 -CTAB" samples, use a microsampler to drop 9-12 drops of 0.1 μL water on the surface of the sample, and then put the sample into figure 1 In the sandwich structure shown, place it on the cold platform, cool down at a rate of 5°C / min, observe and record the freezing temperature of water droplets, repeatedly measure 100-200 water droplets, calculate the average value, and statistical data ( figure 2 shown). It was found that the maximum difference in freezing temperature of samples with different counter ions was about 10°C; the coating "(PMAA) 8 The freezing temperature of the -CTAB" sample is the lowest compared to the others, at around -24°C.

[0119] It can be seen that b...

Embodiment 3

[0120] The influence of embodiment 3 coating thickness on coating freezing temperature

[0121] According to the method of embodiment 1, prepare the hydrogel coating "(PMAA) with cetyltrimethylammonium bromide ion of 7 kinds of thickness 2 -CTAB', '(PMAA) 4 -CTAB', '(PMAA) 6 -CTAB', '(PMAA) 8 -CTAB', '(PMAA) 10 -CTAB', '(PMAA) 20 -CTAB', '(PMAA) 30 -CTAB" samples, use a microsampler to drop 9-12 drops of 0.1 μL water on the surface of the sample, and then put the sample into figure 1 In the sandwich structure shown, place it on a cold platform, cool down at a rate of 5°C / min, observe and record the freezing temperature of water droplets. Record the freezing temperature of the water droplets on each sample, repeatedly measure 100-200 water droplets, calculate the average value, and statistical data ( image 3 shown).

[0122] It was found that: under different thicknesses, the coating "(PMAA) n -CTAB" samples have low freezing temperatures, between -24°C-(-28°C).

[0...

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Abstract

The invention belongs to the technical field of surface working and coatings, and particularly relates to a hydrogel coating and a production method and application thereof. According to the hydrogelcoating, different polyelectrolytes are adopted for being coated onto a surface of a base material alternatively in a layer-by-layer assembly mode, and through chemical cross-linking, a polyelectrolyte network structure is produced, so that the purposes of reducing freezing temperature and prolonging freezing time are achieved. The produced coating has the characters that the production technologyis simple, the application range is wide, large-area construction is easy, the coating is environmentally friendly, and has excellent anti-icing and anti-frost effects, and the like.

Description

technical field [0001] The invention belongs to the technical field of surface processing and coating, and in particular relates to a hydrogel coating and its preparation method and application. Background technique [0002] Icing phenomena widely exist in nature, especially in low-temperature and high-humidity environments. The icing phenomenon that occurs in the fields of heat exchange, transportation, electric power, communication, aviation, and national defense often causes problems such as increased energy consumption and reduced efficiency, and can also cause safety hazards, and even lead to catastrophic accidents. Therefore, the research and preparation of anti-icing materials are of great significance to the economy, society and national defense security. [0003] In addition to heating, the anti-icing of cold surfaces can take targeted measures before or after icing: prevent the accumulation of water droplets on the cold surface or prevent the freezing of accumulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/18C09D179/02C09D133/02C09D139/06
CPCC09D125/18C09D133/02C09D139/06C09D179/02
Inventor 郭倩贺志远吕健勇王健君
Owner INST OF CHEM CHINESE ACAD OF SCI
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