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A nanoparticle mixture and light-transmitting film

A nanoparticle and light-transmitting film technology, 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, low cost, and wide absorption band range

Active Publication Date: 2020-04-14
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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  • A nanoparticle mixture and light-transmitting film
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  • A nanoparticle mixture and light-transmitting film

Examples

Experimental program
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Effect test

preparation example Construction

[0070] Preparation method of indium tin oxide nanoparticles:

[0071] Weigh 300mg of indium acetylacetonate and an appropriate amount of acetylacetonate tin chloride in a round bottom flask, add 17ml of octadecene solvent, and stir evenly with a magnet. Then, under inert gas protection, heat to 250°C for 30 minutes, then add 1 ml of oleic acid, and immediately heat the solution to 270°C for 1 hour. Then 3ml of oleylamine was added, and the solution was immediately heated to 290°C for 1h. After the reaction, when the temperature of the solution drops to room temperature, 30 ml of isopropanol is 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] The above-mentioned cesium tungstate and indium tin oxide nanoparticles can expand the feed ratio of each component compared with the same period in the synthesis proces...

Embodiment 1

[0082] Mix the nanoparticle mixture according to the nanoparticles and their corresponding mass fractions shown in Table 1;

[0083] Table 2 The composition ratio of the nanoparticle mixture of Example 1

[0084]

[0085] Use the ultraviolet-visible-near infrared spectrophotometer to measure the transmittance spectrum of the heat insulation film added with the nanoparticle mixture of Example 1, such as image 3 As shown, it can be seen from the figure that most of the infrared light is intercepted.

Embodiment 2

[0087] Mix the nanoparticle mixture according to the nanoparticles and their corresponding mass fractions shown in Table 3;

[0088] Table 3 The composition ratio of the nanoparticle mixture of Example 2

[0089]

[0090]

[0091] Use an ultraviolet-visible-near-infrared spectrophotometer to measure the transmittance spectrum of the heat shield film added with the nanoparticle mixture of Example 2, such 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 nano-materials, and specifically relates to a nano-particle mixture capable of shielding near-infrared light, which can be used to prepare building energy-saving heat insulation window films. Background technique [0002] In building houses, the radiant energy of sunlight entering the room through windows is one of the most important reasons for the high indoor temperature in summer. In order to create a comfortable and good indoor environment, the use of air conditioning and other refrigeration implementations consumes a lot of electricity; while huge energy consumption, it also emits a large amount of carbon dioxide into the atmosphere, making environmental problems such as the greenhouse effect increasingly serious and worse. At present, building energy consumption has accounted for 30% of my country's total energy consumption, ranking first among all types of energy consumption. Therefore, in order to alleviate the...

Claims

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Application Information

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Patent Type & Authority Patents(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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