High-transparency ultraviolet-blocking energy-saving film and solution-fusion preparation method thereof

A transparent violet, energy-saving film technology, which is applied in the field of polymer-inorganic nanoparticle composite technology to synthesize composite films, can solve the problems of coating yellowing, reduce the service life of the coating, etc., achieve low production costs, increase energy-saving performance, UV Excellent shielding performance

Inactive Publication Date: 2011-02-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the direct use of nano-ZnO, nano-titanium oxide, etc. has obvious photocatalytic degradation effect on organic matter. When the coating is irradiated with ultraviolet rays, the coating will turn yellow in a short time, so the service life of the coating will be significantly reduced.

Method used

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  • High-transparency ultraviolet-blocking energy-saving film and solution-fusion preparation method thereof
  • High-transparency ultraviolet-blocking energy-saving film and solution-fusion preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1) The methanol solution (initial dispersion) of the core-shell structure ZnO nanoparticles is centrifuged and washed, then transferred to absolute ethanol, and ultrasonically dispersed to make a concentration of 5.88wt% core-shell structure ZnO nanoparticles The ethanol dispersion liquid, the ZnO nanoparticles in the dispersion liquid are in the shape of long rods with a diameter of about 50nm;

[0047] 2) Take by weighing 220g of the core-shell structure ZnO nanoparticle ethanol dispersion liquid prepared in step 1), add 633.86g absolute ethanol, just add 12.963g PVB powder while stirring, make PVB dissolve, make core-shell structure nano ZnO / Dispersion of PVB in ethanol;

[0048] 3) The ethanol dispersion of the core-shell structure nano ZnO / PVB obtained in step 2) is spray-dried on a spray dryer to obtain a dry powder masterbatch of ZnO:PVB=1:1;

[0049] 4) Weigh the dry powder masterbatch prepared in step 3) with PVB and plasticizer DOS in a ratio of 2:99:20 by w...

Embodiment 2

[0056] 1) The dry powder masterbatch prepared in step 3 of Example 1 and PVB and plasticizer DBS are weighed in a ratio of 2:99:40 by weight (the actual proportioning of ZnO, PVB, DBS is 1: 100:40), fully mixed uniformly in a high-speed mixer to obtain a complete recipe, the composition (weight percentage) is shown in Table 2-1:

[0057] composition

[0058] table 2-1

[0059] 2) Injection molding the complete recipe prepared in step 1) in an injection molding machine, the temperature of the feeding section is 100-120°C, the temperature of the melting section is 120-150°C, and the outlet temperature is 130-140°C. The sample prepared by injection molding was pressed between two pieces of quartz glass to form a thin film. The thickness of the obtained thin film was 0.22mm. The optical performance test results are shown in Table 2-2.

[0060] Visible light transmittance (%) (550nm)

[0061] Table 2-2

Embodiment 3

[0063] 1) according to the method of embodiment 1 step 1), make the ethanol dispersion liquid of the core-shell structure ZnO nanoparticle that concentration is 5.88wt%;

[0064] 2) Take by weighing 220g step 1) the core-shell structure ZnO nanoparticle ethanol dispersion liquid prepared, add 356.56g dehydrated alcohol, just add 5.544g PVB powder while stirring, make PVB dissolve, make core-shell structure nano ZnO / Dispersion of PVB in ethanol;

[0065] 3) The ethanol dispersion of the core-shell structure nano ZnO / PVB obtained in step 2) is spray-dried on a spray dryer to obtain a dry powder masterbatch of ZnO:PVB=7:3;

[0066] 4) Weigh the dry powder masterbatch prepared in step 3) with PVB and plasticizer 3G8 according to the actual ratio of ZnO, PVB and 3G8 at 2:100:35, and fully mix them evenly in a high-speed mixer to obtain a complete formula material, its composition (weight percentage) is shown in Table 3-1;

[0067] composition

[0068] Table 3-1

[006...

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Abstract

The invention discloses a high-transparency ultraviolet-blocking energy-saving film and a solution-fusion preparation method thereof, which belong to the field of composite films. The film comprises the following components: 50 to 99.8 weight percent of thermoplastic polymer, 0.2 to 50 weight percent of metallic oxide nanoparticles (which at least comprise one kind of composite metallic oxide nanoparticles with a core-shell structure) and 0 to 39.9 weight percent of plastic assistant. The film is prepared by a solution-fusion mixing process which comprises the following steps of: transferring the metallic oxide nanoparticles from an initial disperse system to a solvent system capable of dissolving the thermoplastic polymer to prepare metallic oxide nanoparticle / thermoplastic polymer / solvent dispersion; and drying the obtained dispersion by atomization to obtain a dry powdered master batch and preparing the energy-saving film from the master batch, the thermoplastic polymer and the assistant by using the fusion mixing process. The film in the invention has high transparency, high ultraviolet light shielding performance and good energy-saving effects and is simple in preparation process, low in cost and suitable for industrial production.

Description

technical field [0001] The invention relates to a highly transparent ultraviolet blocking energy-saving film and a preparation method thereof, belonging to the field of composite films synthesized by polymer-inorganic nano particle composite technology. Background technique [0002] Ultraviolet light is a kind of non-visible light with specific lethality, which is called "invisible killer" by the scientific community. Since the 1920s, due to the extensive use of fluorocarbon solvents and freons, the ozone layer in the earth's atmosphere has been severely damaged, and the ultraviolet rays reaching the earth's surface have continued to increase. Ultraviolet rays are divided according to the length of their wavelengths: the wavelength of UV-A band is 320-400nm; the wavelength of UV-B is 280-320nm; Therefore, the ultraviolet wavelength range that can produce radiation to the human body is 180-400nm. [0003] The ultraviolet rays with strong radiation mainly come from two aspec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/14C08L23/06C08L23/08C08L67/02C08L101/00C08L69/00C08L33/12C08K9/10C08L27/06C08K3/22C08L31/04C08K13/06C08L23/20C08L25/06C08L25/14C08L23/12
Inventor 陈建峰曾晓飞沈志刚王国全刘海涛
Owner BEIJING UNIV OF CHEM TECH
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