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High-transparent ultraviolet-blocking energy-saving membrane and solution phase transfer preparation method

A technology of energy-saving film and transparent violet, which is applied in the field of highly transparent UV-blocking energy-saving film and its preparation, can solve the problems of reducing the service life of the film, yellowing, etc., and achieve the effects of low production cost, small environmental pollution, and remarkable energy-saving effect

Active Publication Date: 2013-07-03
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • High-transparent ultraviolet-blocking energy-saving membrane and solution phase transfer preparation method
  • High-transparent ultraviolet-blocking energy-saving membrane and solution phase transfer preparation method
  • High-transparent ultraviolet-blocking energy-saving membrane and solution phase transfer preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) The initial dispersion system of methanol solution of zinc oxide nanoparticles with core-shell structure, after centrifugation and washing, is transferred to absolute ethanol, and magnetically stirred and ultrasonically dispersed to form ethanol dispersion of zinc oxide nanoparticles with core-shell structure liquid; the concentration of the core-shell structure zinc oxide nanoparticles in the dispersion is 5.88wt%, in the shape of a long rod with a diameter of about 50nm;

[0049] 2) Take 16ml of the dispersion in step 1), add 4ml of absolute ethanol, and mix evenly with magnetic stirring. After ultrasonic treatment for 4 hours, add 0.8g PVB powder, mix evenly with magnetic stirring, and ultrasonically disperse for 0.5h to prepare the film-making stock solution . The obtained film-making stock solution system is shown in Table 1-1;

[0050]

[0051] Table 1-1

[0052] 3) Select the PET substrate for film formation: after the PET substrate is pretreated with de...

Embodiment 2

[0056] 1) Centrifuge and wash the initial dispersion system of ZnO nanoparticles with core-shell structure in n-hexane, then transfer it to toluene, and ultrasonically disperse to make a toluene dispersion of core-shell structure ZnO nanoparticles. The core-shell structure in the dispersion is Zinc oxide nanoparticles with a concentration of 5wt% are spherical in shape with a particle size of 10-20nm;

[0057] 2) Take toluene, PMMA-PS copolymer, and the core-shell structure zinc oxide nanoparticle toluene dispersion in step 1) respectively according to the ratio of Table 2-1, and magnetically stir and ultrasonically disperse and mix evenly to obtain the film-making stock solution ;

[0058]

[0059] table 2-1

[0060] 3) Casting the film-forming stock solution obtained in step 2) into a mold for direct molding, and the thickness of the obtained film is 300 μm. The optical performance test results are shown in Table 2-2.

[0061]

[0062] Table 2-2

Embodiment 3

[0064] 1) Centrifuge and wash the initial dispersion system of ZnO nanoparticles with core-shell structure in n-hexane, transfer it to ethyl acetate, and disperse it by ultrasonic to make a dispersion liquid of zinc oxide nanoparticles with core-shell structure in ethyl acetate. The concentration of zinc oxide nanoparticles with a core-shell structure is 5wt%, which is spherical and has a particle size of 10-20nm;

[0065] 2) Measure ethyl acetate, AC-PU copolymer, and the core-shell structure zinc oxide nanoparticle ethyl acetate dispersion in step 1) according to the ratio of Table 2-1 respectively, after magnetic stirring, ultrasonic dispersion and mixing , adding the surface-treated indium tin oxide (ITO) ethyl acetate dispersion liquid to the above solution, stirring evenly to obtain the film-making stock solution of ZnO / indium tin oxide (ITO) / AC-PU;

[0066]

[0067] Table 3-1

[0068] 3) Coating the film-forming stock solution obtained in step 2) on a PET substrate ...

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Abstract

A UV blocking energy-saving film with high transparency and a preparation method thereof by solution phase transfer are disclosed. The film comprises from 50 to 99.8wt% of high molecular polymers and from 0.2 to 50wt% of metal oxide nano-particles which comprise at least one metal oxide composite nano-particle having a core-shell structure. The film is prepared by solution phase transfer method comprising the following steps: transferring the metal oxide nano-particles in initial dispersion system into a solvent system capable of dissolving polymers by steps of centrifugal separation and washing and the like, so that a dispersion of the metal oxide nano-particles / thermoplastic polymers / solvent, i.e. a raw liquid for film formation, is obtained; then forming a film by applying said raw liquid on a substrate.

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 Patents(China)
IPC IPC(8): C08L101/00C08L29/14C08L33/04C08L63/00C08L39/06C08L25/06C08L75/04C08L23/08C08L31/04C08L69/00C08L67/02C08L27/06C08L83/00C08L33/12C08L25/14C08K9/10C08K3/22C08J5/18
CPCC08K9/10C08L101/00C08L29/14C08K9/00C08L25/06C08L31/04C08L25/14C08L67/02C08L83/00C08L63/00C08L27/06C08L69/00C08L23/08C08K3/22C08J5/18C08L33/04C08L39/06C08L75/04C08L33/12
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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