High-transparent ultraviolet-blocking energy-saving membrane and preparation method thereof by way of phase transfer in solution

A transparent purple, energy-saving film technology, applied in the field of polymer-inorganic nanoparticle composite technology to synthesize composite films, can solve problems such as shortening the service life of the film, yellowing, etc., and achieves low production cost, low environmental pollution, and simple and easy production process. row effect

Active Publication Date: 2011-02-16
BEIJING UNIV OF CHEM TECH
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  • 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 preparation method thereof by way of phase transfer in solution
  • High-transparent ultraviolet-blocking energy-saving membrane and preparation method thereof by way of phase transfer in solution
  • High-transparent ultraviolet-blocking energy-saving membrane and preparation method thereof by way of phase transfer in solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 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;

[0047] 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;

[0048] Concentration of ZnO in EtOH (g / ml)

[0049] Table 1-1

[0050] 3) Select the PET substrate for film formation: af...

Embodiment 2

[0054] 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;

[0055] 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 ;

[0056] Concentration of ZnO in toluene (g / ml)

[0057] table 2-1

[0058] 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.

[0...

Embodiment 3

[0062] 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;

[0063] 2) Take 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 to the above solution, stirring evenly to obtain a film-forming stock solution of ZnO / indium tin oxide (ITO) / AC-PU;

[0064]

[0065] Table 3-1

[0066] 3) Coating the film-forming stock solution obtained in step 2) on a PET substrate to form a f...

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Abstract

The invention discloses a high-transparent ultraviolet-blocking energy-saving membrane and a preparation method thereof by way of phase transfer in solution, which belong to the field of composite thin films. The high-transparent ultraviolet-blocking energy-saving membrane comprises the following compositions in percentage by weight: 50 to 99.8 percent of high polymer, and 0.2 to 50 percent of metallic-oxide nano particles (at least compring a composite metal oxide nanoparticle with a core-shell structure); and the method for preparing the high-transparent ultraviolet-blocking energy-saving membrane by way of phase transfer in solution comprises the following steps: transferring the metal oxide nanoparticles from an initial disperse system to a solvent system in which the high polymer canbe dissolved through the steps of centrifugal separation and washing and the like, then preparing the metal oxide nanoparticles into metal oxide nanoparticles/thermoplastic polymer/solvent dispersion, namely, stock membrane-making solution; and preparing the stock membrane-making solution into the energy-saving membrane on a substrate. The high-transparent ultraviolet-blocking energy-saving membrane of the invention has the advantages of high transparency, good ultraviolet shielding performance, good energy-saving effect, simple preparation process and low cost, therefore, the membrane is 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): C08L33/04C08L63/00C08L29/14C08K3/22C08L25/06C08L23/08C08J5/18C08L83/00C08K9/10C08L75/04C08L25/14C08L39/06C08L69/00C08L33/12C08L31/04C08L67/02C08L101/00C08L27/06
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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