Unlock instant, AI-driven research and patent intelligence for your innovation.

Hydrophobic self-cleaning transparent sound-absorption film and preparation method thereof

A transparent and thin-film technology, which is applied in coatings, special surfaces, and devices for coating liquids on surfaces, can solve problems such as micropore blockage on the surface of sound-absorbing films, corrosion of sound-absorbing materials, and expensive chlorosilanes. Improve sound absorption and noise reduction performance, good light transmittance effect

Inactive Publication Date: 2014-05-28
NANJING UNIV OF SCI & TECH +1
View PDF1 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] U.S. H.M. Shang et al. used tetraethyl orthosilicate as the basic silicon source to prepare nano-silica transparent self-cleaning film (H.M. Shang, Y. Wang, S.J. Limmer, T.P. Chou, K. Takahashi, G.Z. Cao, Optically transparent superhydrophobic silica-based films, Thin Solid Films, 472 (2005) 37-43.), the static contact angle of the film is above 150°, and the transparency is at It is more than 90% in the visible light range; however, in the preparation process, it needs to be modified with chlorosilane, which will cause serious corrosion to the sound-absorbing material, and the chlorosilane used is very expensive, and is not suitable for the surface of the sound-absorbing material
At the same time, the coating will seriously block the micropores on the surface of the sound-absorbing film

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrophobic self-cleaning transparent sound-absorption film and preparation method thereof
  • Hydrophobic self-cleaning transparent sound-absorption film and preparation method thereof
  • Hydrophobic self-cleaning transparent sound-absorption film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A method for preparing a hydrophobic self-cleaning transparent sound-absorbing film of the present invention comprises the following steps:

[0028] (1) Mechanically process the transparent polymer base film to form a microporous structure on the surface. The thickness of the base film ranges from 0.05 to 0.3 mm. The diameter of the micropores ranges from 0.05 to 0.3 mm;

[0029] (2) Preparation of nano-silica particles: Dissolve tetraethyl orthosilicate in ethanol solution, stir to keep the temperature at 20~90°C, add ammonia solution and KH-570, tetraethyl orthosilicate to the mixture dropwise The molar concentration ratio of ester, ammonia water and KH-570 is 1:1.2:1.53~1:21.2:1.53, and the reaction is continued. After the reaction, the mixed solution is dried and ground to obtain nano-silica particles;

[0030] (3) Preparation of polyvinylidene fluoride (PDVF) mixed solution: mix N-N-dimethylformamide and butanone, add polyvinylidene fluoride powder, N-N-dimethylf...

Embodiment 1

[0038] (1) Mechanically process the transparent polycarbonate base film to form a microporous structure on the surface. The thickness of the base film ranges from 0.05 to 0.3 mm. The diameter of the micropores ranges from 0.05 to 0.3 mm;

[0039] (2) Dissolve tetraethyl orthosilicate (3ml) in (60mL) ethanol solution, stir to keep the temperature at 20°C, add ammonia solution and KH-570, tetraethyl orthosilicate, ammonia water and The molar concentration ratio of KH-570 is 1:10:1.53, and the reaction is continued. After the reaction, the mixed solution is dried and ground to obtain nano-silica particles;

[0040] (3) Preparation of polyvinylidene fluoride (PDVF) mixed solution: Mix 25mL N,N-dimethylformamide and 3mL butanone, add 1.7g polyvinylidene fluoride powder to the mixture, stir and dissolve to obtain PDVF mixture;

[0041](4) Add the nano-silica particles prepared in step (2) to the PDVF mixed solution in step (3), and the amount of nano-silica particles added is 0.0...

Embodiment 2

[0045] (1) Mechanically process the transparent polyacrylate base film to form a microporous structure on the surface. The thickness of the base film ranges from 0.05 to 0.3 mm. The diameter of the micropores ranges from 0.05 to 0.3 mm;

[0046] (2) Dissolve tetraethyl orthosilicate (1ml) in (60mL) ethanol solution, stir to keep the temperature at 90°C, add ammonia solution and KH-570, tetraethyl orthosilicate, ammonia water and The molar concentration ratio of KH-570 is 1:14:1.53, and the reaction is continued. After the reaction is completed, the mixed solution is dried and ground to obtain nano-silica particles;

[0047] (3) Preparation of polyvinylidene fluoride (PDVF) mixed solution: Mix 30mL N,N-dimethylformamide and 5mL butanone, add 1.1g polyvinylidene fluoride powder to the mixture, stir and dissolve to obtain PDVF mixture;

[0048] (4) Add the nano-silica particles prepared in step (2) to the PDVF mixed solution in step (3). The amount of nano-silica particles add...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
pore sizeaaaaaaaaaa
contact angleaaaaaaaaaa
Login to View More

Abstract

The invention discloses a hydrophobic self-cleaning transparent sound-absorption film and a preparation method thereof, wherein nanosilicon dioxide is taken as a basic particle, other polymeric additives are added to improve the hydrophobic effect, and the mixture slurry is sprayed on the surface of a porous sound-absorption film to form a film, the method comprises the following steps: punching a transparent polymer base film firstly to prepare the porous transparent sound-absorption film; then taking tetraethyl orthosilicate and KH-570 as a basic silicon source to prepare the modified nanosilicon dioxide particles; then mixing certain amount of polyvinylidene fluoride, N,N-dimethylformamide, and butanone according to the proportion to prepare a polyvinylidene fluoride mixed solution; then, mixing certain amount of nanosilicon dioxide particles with the polyvinylidene fluoride mixed solution; finally spraying the mixed solution on the surface of the porous transparent sound-absorption film cleaned with ethyl alcohol, and drying to form a coating. The hydrophobic self-cleaning transparent sound-absorption film provided by the invention has the advantages of higher water contact angle and better sound absorption and noise reduction effects, the coating is higher in light transmittance, and besides, a micropore structure of the sound absorption surface is not blocked.

Description

[0001] The invention relates to a preparation method of a hydrophobic coating, in particular to a hydrophobic self-cleaning transparent sound-absorbing film and a preparation method thereof. Background technique [0002] With the development of modern industry and transportation, noise pollution is becoming more and more serious, and with the continuous enhancement of people's awareness of environmental protection, people's requirements for the sound environment are also getting higher and higher, so sound-absorbing materials have gradually become the focus of everyone's attention. The sound-absorbing material is based on the theory of microporous resonance sound absorption, and micropores with a diameter of 0.05~0.3mm are pierced on the porous transparent sound-absorbing film, but the surface of this sound-absorbing material is easy to accumulate dust, and then block the porous transparent film Micropores affect its ability to absorb noise. [0003] A self-cleaning coating is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D127/16C09D7/12C09D5/00B29C67/20B05D5/08
Inventor 熊党生王楠张维珏张荣初
Owner NANJING UNIV OF SCI & TECH