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Color-changing material based on metal nanoparticles and application of color-changing material

A technology of metal nanoparticles and color-changing materials, which is applied in the direction of analyzing materials through chemical reactions and observing the influence of chemical indicators on materials, etc. It can solve the problem that the light response cannot meet the needs of visualization, and there are few multi-modes. Respond to problems such as the visual system to achieve a significant color change effect, achieve energy consumption, and low energy consumption

Pending Publication Date: 2022-02-25
WUHAN TEXTILE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of optical devices, the optical response of a single mode can no longer meet the needs of visualization, and there are few researches on visual systems that can realize optical multi-mode response modulation at the same time.
Moreover, once the structure of traditional plasmonic metal materials is fixed, it has been a great challenge to achieve reversible color conversion through wavelength-depth modulation highly dependent on the shape of nanoparticles under environmental stimuli.
Even, some stimuli require additional power consumption

Method used

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  • Color-changing material based on metal nanoparticles and application of color-changing material
  • Color-changing material based on metal nanoparticles and application of color-changing material
  • Color-changing material based on metal nanoparticles and application of color-changing material

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preparation example Construction

[0038] The metal nanoparticles are preferably surface-modified metal nanoparticles, and the surface modifiers employed include, but are not limited to, sodium citrate or polyvinylpyrrolidone. The color type and responsiveness can be adjusted by modification of metal nanoparticles. The preparation method of surface modified metal nanoparticles includes: adding water-soluble silver salts, surface modifiers, and reducing agents to deion water, reacted at 25-40 ° C for 0.5 to 2 h, then centrifugation, to give metal nanoplasts.

[0039] For example, in a specific embodiment, ion water (200 mL 18.25 Ω), silver nitrate (AGNO 3 200 μL of 0.1m), sodium citrate (NA 3 CA 12ml 75mm) and hydrogen peroxide (H 2 O 2 480 μl 30% of the solution was added to 250 ml of conical flask, and magnetically stirred in a constant temperature water bath at a constant temperature water bath at a constant temperature of 30 ° C. After a constant temperature, fresh borohydride (Nabh) 4 1.2ml 0.1m) Quickly inject i...

Embodiment 1-4

[0051] A discoloration composite film material based on metal nanoparticles, prepared by the following steps:

[0052] (1) Preparation of Silver Triangle Plate (TSCAG):

[0053] Remove ion water (200 mL 18.25Ω), silver nitrate (AGNO 3 200 μL 0.1M), sodium citrate (NA 3 Ca12ml 75mm), hydrogen (H 2 O 2 480 μl 30% of the solution was added to 250 ml of conical flask, and magnetically stirred in a constant temperature water bath at a constant temperature water bath at a constant temperature of 30 ° C. After a constant temperature, fresh borohydride (Nabh) 4 1.2ml 0.1m) Quickly inject into the conical bottle, you can see the solution quickly into yellow, orange, red, and finally become blue. At this time, the constant temperature water bath was continued for 15 min, then put it at a constant temperature cassette at 30 ° C for two hours, and the suspension of the silver triangle plate was centrifuged for two hours, and the suspension of the silver triangle plate was centrifuged.

[0054...

Embodiment 5-8

[0063] Example 5-8 The metal nanoplastic discoloration composite film material is provided, which is different from that of Example 4, and the silver triangle plate and different concentrations of sodium citrate in different concentrations are employed. Vinylpyrrolidone-modified silver triangle plate, to obtain the product, respectively, respectively, respectively, respectively, respectively, respectively, respectively, 2 TSCAG @ HA, and 1PVPAG @ HA, 2PVPAG @ HA. Others are substantially the same as in Example 4, and will not be described herein.

[0064] Example 5-8 The obtained moisture-sensitive test was prepared by the test method, and the test method was as follows: prepared a prepared film, and the film was given a moisture stimulus with a humidifier, and the color of the film changed immediately. Test results figure 2 Indicated.

[0065] from figure 2 It can be seen that the TSCAG @ HA material made by Example 5-6 presents the evolution of rose red to orange; Example 7-8 Th...

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Abstract

The invention provides a color-changing material based on metal nanoparticles and application of the color-changing material. The color-changing material comprises carboxyl complex metal nanoparticles, wherein the carboxyl complexed metal nanoparticles comprise a carboxyl-containing compound and metal nanoparticles complexed with the carboxyl-containing compound. The color-changing material based on the metal nanoparticles reversibly changes in color and / or transparency as humidity changes. After the carboxyl-containing high polymer material with a high hygroscopic expansion rate is complexed with the metal nanoparticles, the complexed material can be used as a filler to be added into a high polymer composite material with a highly similar refractive index and a small hygroscopic expansion rate, and common reversible tuning of moisture-responsive color and transparency can be realized. The color-changing material provided by the invention can be prepared into a film, a gel, a fiber and other forms, can also be used as a moisture-responsive color evolution filler, and is expected to be applied to the fields of low-energy-consumption optical response windows, humidity decoding paper and other intelligent materials.

Description

Technical field [0001] The present invention relates to the field of optical response intelligent materials, and more particularly to a discoloration material based on metal nanoparticles and its application thereof. Background technique [0002] In recent years, intelligent optical materials based on optical modulation based on external stimuli have great application prospects in optical switches, sensors, smart windows, etc., thereby caught extensive interest. Typically, this intelligent optical material refers to an inverse optical response such as color, light transmittance, and polarization degree when an electric field, temperature, humidity, pressure, and the like can occur. [0003] The physical coloring of the plasmine causes light scattering or light transmissions caused by its selective absorption, or even due to its ability to have a rich visual enjoyment in additional stimulation, it can be applied to the optical device. However, with the development of the optical d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/81
CPCG01N21/81
Inventor 王栋李颖颖房然然王雯雯
Owner WUHAN TEXTILE UNIV
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