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Nano particle mixture and light transmission film

A technology of nanoparticles and mixtures, which is applied in the field of nanomaterials, can solve the problems of limited absorption capacity, different absorption range, and inability to cover the near-infrared band, and achieve the effects of strong absorption capacity, wide absorption band range, and low cost

Active Publication Date: 2018-12-07
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these two types of nanoparticles have high transmittance in visible light, they have different absorption ranges in the near-infrared band: Cs 0.32 WO 3 Nanoparticles mainly have strong absorption of near-infrared light in the 800nm-1500nm band, but have limited absorption ability in the 1500nm-3000nm band; and ITO nanoparticles have almost no absorption in the 800nm-1500nm band, but have an absorption effect in the 1500nm-3000nm band better
In summary, either Cs 0.32 WO 3 Neither nanoparticles nor ITO nanoparticles can cover the entire near-infrared band from 800nm ​​to 3000nm, which restricts the heat insulation capacity and energy-saving efficiency of building doors and windows

Method used

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  • Nano particle mixture and light transmission film
  • Nano particle mixture and light transmission film
  • Nano particle mixture and light transmission film

Examples

Experimental program
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Effect test

preparation example Construction

[0070] The preparation method of indium tin oxide nanoparticles:

[0071] Weigh 300 mg of indium acetylacetonate and an appropriate amount of tin chloride acetylacetonate in a round bottom flask, add 17 ml of octadecene solvent, and stir evenly with a magnet. Then, under the protection of inert gas, heat to 250°C and keep it warm for 30min, then add 1ml of oleic acid, and immediately heat the solution to 270°C and keep it warm for 1h. Subsequently, 3ml of oleylamine was added, and the temperature of the solution was immediately raised to 290° C. and kept for 1 hour. After the reaction, when the temperature of the solution dropped to room temperature, 30ml of isopropanol was added to flocculate the nanoparticles. After the nanoparticles are separated by centrifugation, the prepared ITO nanoparticles coated with oleylamine oleic acid can be redispersed in 20.0 ml of cyclohexane solvent.

[0072] During the synthesis process of the above-mentioned cesium tungstate and indium ti...

Embodiment 1

[0082] Carry out the mixing of the nanoparticle mixture by the nanoparticles shown in Table 1 and their corresponding mass fractions;

[0083] The component ratio of the nanoparticle mixture of table 2 embodiment 1

[0084]

[0085] Utilize ultraviolet-visible-near-infrared spectrometer to measure the transmittance spectrum of the heat-shielding film that adds the nanoparticle mixture of example 1, as image 3 As shown, it can be seen from the figure that most of the infrared light is intercepted.

Embodiment 2

[0087] Carry out the mixing of the nanoparticle mixture by the nanoparticles shown in Table 3 and their corresponding mass fractions;

[0088] The component ratio of the nanoparticle mixture of table 3 embodiment 2

[0089]

[0090]

[0091] Utilize ultraviolet-visible-near-infrared spectrometer to measure the transmittance spectrum of the heat-shielding film that adds the nanoparticle mixture of example 2, as Figure 4 As shown, it can be seen from the figure that most of the infrared light is intercepted.

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Abstract

The invention discloses a nano particle mixture capable of shielding near infrared light and a light transmission film containing the nano particle mixture. According to the method, cesium tungstate nanoparticles and indium tin oxide nanoparticles with different tin doping contents are blended, so that a nano particle mixture with the shielding wave band capable of covering the whole near-infraredwave band of 800 nm-3000 nm can be obtained, and has a wide application prospect in the field of building energy conservation.

Description

technical field [0001] The invention belongs to the field of nanomaterials, and in particular relates to a nanoparticle mixture capable of shielding near-infrared light, which can be used to prepare energy-saving heat-insulating window films for buildings. Background technique [0002] In building houses, the radiant energy of sunlight entering the room through windows is one of the most important causes of excessive indoor temperature in summer. In order to create a comfortable and good indoor environment, the use of refrigeration such as air conditioners consumes a large amount of electric energy; at the same time as the huge energy consumption, it also emits a large amount of carbon dioxide into the atmosphere, which makes environmental problems such as the greenhouse effect more serious and worse. At present, building energy consumption has accounted for 30% of my country's total energy consumption, ranking first among all kinds of energy consumption. Therefore, in orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/24C08K3/22C08L23/06C08L27/06C08L23/12
CPCC08K3/22C08K3/24C08L2201/08C08L23/06C08L27/06C08L23/12
Inventor 杨槐梁霄陈梅张兰英李辰悦张翠红
Owner PEKING UNIV
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