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A kind of superhydrophilic film of nano calcium silicate hydrate and its preparation method and application

A hydrated calcium silicate and super-hydrophilic technology, which is applied in the field of organic-inorganic super-hydrophilic composite membranes, super-hydrophilic films and their preparation, can solve the problems of unfavorable industrial application, complicated preparation process, and high cost of raw materials , to achieve the effects of lower raw material prices, simple preparation process, and good anti-fog performance

Active Publication Date: 2015-11-18
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These self-assembly methods need to prepare inorganic particles with different sizes of micron and nanometer in advance when constructing rough surfaces. The preparation process is complicated and the cost of raw materials is high, which is not conducive to industrial application.

Method used

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  • A kind of superhydrophilic film of nano calcium silicate hydrate and its preparation method and application
  • A kind of superhydrophilic film of nano calcium silicate hydrate and its preparation method and application
  • A kind of superhydrophilic film of nano calcium silicate hydrate and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Using a quartz substrate as the base film, the organic matter on the surface was first removed with ethanol / chloroform, and then 98wt%H with a volume ratio of 7:3 at 70°C 2 SO 4 , with 30wt%H 2 o 2 Soak in the mixed aqueous solution for 60 minutes, clean with deionized water; then soak in the mixed solution of concentrated ammonia / hydrogen peroxide / water with a volume ratio of 1:1:5 for 20 minutes, and wash with deionized water until neutral; Immerse the base film in a 1.0g / L polyethyleneimine (PEI) solution containing 0.01mol / mL calcium acetate, take it out after 30min, rinse it with deionized water, and then immerse it in a 1.0g / L solution containing 0.01mol / mL sodium silicate. g / L polystyrene sodium sulfonate (PSS) solution, after 30min, take it out, wash thoroughly with deionized water, repeat the above operation and immerse in 1.0g / L polyethyleneimine (PEI) containing 0.01mol / mL calcium acetate ) solution and immersed in 1.0g / L polystyrene sodium sulfonate (PSS)...

Embodiment 2

[0026] Using a quartz substrate as the base film, the organic matter on the surface was first removed with ethanol / chloroform, and then 98wt%H with a volume ratio of 7:3 at 100°C 2 SO 4 , with 30wt%H 2 o 2 Soak in the mixed aqueous solution for 15 minutes, clean with deionized water; then soak in the mixed solution of concentrated ammonia / hydrogen peroxide / water with a volume ratio of 1:1:5 for 20 minutes, and wash with deionized water until neutral; The final basement film was immersed in 8.0g / L polyethyleneimine (PEI) solution containing 0.1mol / mL calcium acetate. 8.0g / L polystyrene sodium sulfonate (PSS) solution, after 10min, take it out, wash thoroughly with deionized water, repeat the above operation and immerse in 8.0g / L polyethyleneimine containing 0.1mol / mL calcium acetate ( PEI) solution and immersed in 8.0g / L polystyrene sodium sulfonate (PSS) solution containing 0.1mol / mL sodium silicate once to obtain polyelectrolyte nano calcium silicate hydrate superhydrophil...

Embodiment 3

[0028] Using a quartz substrate as the base film, the organic matter on the surface was first removed with ethanol / chloroform, and then 98wt%H with a volume ratio of 7:3 at 80°C 2 SO 4 , with 30wt%H 2 o 2 Soak in the mixed aqueous solution for 30 minutes, clean with deionized water; then soak in the mixed solution of concentrated ammonia / hydrogen peroxide / water with a volume ratio of 1:1:5 for 20 minutes, and wash with deionized water until neutral; Immerse the base film in 4.0g / L polyethyleneimine (PEI) solution containing 0.5mol / mL calcium acetate, take it out after 15min, rinse it with deionized water, and then immerse it in 4.0g / L solution containing 0.5mol / mL sodium silicate g / L polystyrene sodium sulfonate (PSS) solution, after 15 minutes, take it out, wash thoroughly with deionized water, repeat the above operation and immerse in 4.0g / L polyethyleneimine (PEI) containing 0.5mol / mL calcium acetate ) solution and immersed in 4.0g / L polystyrene sodium sulfonate (PSS) so...

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Abstract

The invention discloses a nanometer calcium silicate hydrate super-hydrophilicity thin film as well as a preparation method and applications of the thin film and belongs to the field of functional composite materials. The preparation method comprises the steps of: soaking a pretreated base film with negative electric charges on surface in a 1.0-8.0g / L cationic polyelectrolyte solution containing 0.01mol / mL-0.1mol / mL soluble calcium salt for 10-30 minutes, then taking out the base film and flushing the base film with deionized water; soaking the base film in a 1.0-8.0g / L anionic polyelectrolyte solution containing 0.01mol / mL-0.1mol / mL soluble silicate for 10-30 minutes, then taking out the base film and completely flushing the base film with deionized water; repeating above operations for 1-3 times to obtain the polyelectrolyte nanometer calcium silicate hydrate super-hydrophilicity thin film. The super-hydrophilicity thin film has a super-hydrophilicity property and an excellent anti-fog property.

Description

technical field [0001] The invention relates to an organic-inorganic superhydrophilic composite film, in particular to a superhydrophilic film formed by polyelectrolyte-nanometer calcium silicate hydrate self-assembly in-situ reaction and its preparation method and application, belonging to functional composite materials field. Background technique [0002] Due to the pollution of water, temperature difference and organic matter, a layer of fog or dirt is easily formed on the surface of transparent substrates such as automobile rear windows, windshields, eye lenses, building glass, bathroom glass, etc., resulting in atomization. In this way, not only greatly reduce its light transmittance, affect the operation, but also increase the cleaning cost and time, and endanger the safety of the operator. [0003] Improving the hydrophilicity of the material surface and obtaining a superhydrophilic surface are the main ways to achieve effective anti-fog. A superhydrophilic surface ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23C04B41/50C08J7/00
Inventor 郭红霞孙鹏志崔素萍王子明张焱秦振平
Owner BEIJING UNIV OF TECH
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