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A method of thermochromic biomimetic intelligent nanocomposite material

A nanocomposite material and thermochromic technology, which is applied in the field of thermochromic biomimetic intelligent nanocomposite materials, can solve the problems that it is difficult to obtain self-supporting thin film materials with excellent mechanical properties and difficult to achieve mechanical properties, and achieve reversible thermochromic effects, Enhanced strength and good operability

Active Publication Date: 2019-01-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional polydiacetylene materials are generally selected to be deposited on the substrate to prepare thermochromic films (Adv. Funct. Mater. 2016, 26, 498, Adv. Funct. Mater. .Soc.2005, 127, 12782, Nature 2001, 410, 913, etc.), it is difficult to obtain self-supporting film materials with excellent mechanical properties
[0004] In summary, it is difficult to improve the mechanical properties of thermochromic materials at present, so the thermochromic nanocomposites with excellent mechanical properties were prepared by biomimetic preparation strategy.

Method used

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  • A method of thermochromic biomimetic intelligent nanocomposite material
  • A method of thermochromic biomimetic intelligent nanocomposite material
  • A method of thermochromic biomimetic intelligent nanocomposite material

Examples

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Embodiment 1

[0034] Weigh 1.5g montmorillonite powder, dissolve in 250mL deionized water, and keep stirring for 7 days. The obtained white suspension was centrifuged twice at 2800 rpm, and the supernatant was taken to obtain a montmorillonite solution with a nominal concentration of 3.20 mg / mL.

[0035] Weigh 10 mg of PCDA, dissolve in 1 mL of 0.5 mol / L NaOH solution, and heat at 70°C for 5 min to obtain a pink colloidal solution. Take the above 5.9mL montmorillonite solution, mix it with 0.1mL PCDA hot solution, heat and stir at 70°C for 5min, and let it stand for 15min to cool to room temperature. The cooled solution was placed under an ultraviolet light for 5 minutes to obtain a purple thermochromic montmorillonite-PCDA solution. The montmorillonite-PCDA solution is vacuum filtered to obtain the montmorillonite-PCDA layered composite material. Thermogravimetric analysis showed that the mass fraction of montmorillonite was 94.2%. Mechanical properties tests show that the tensile stren...

Embodiment 2

[0038] Weigh 1.5g montmorillonite powder, dissolve in 250mL deionized water, and keep stirring for 7 days. The obtained white suspension was centrifuged twice at 2800 rpm, and the supernatant was taken to obtain a montmorillonite solution with a nominal concentration of 2.80 mg / mL.

[0039] Weigh 10 mg of PCDA, dissolve in 1 mL of 0.5 mol / L NaOH solution, and heat at 70°C for 5 min to obtain a pink colloidal solution. Take the above 6.8mL montmorillonite solution, mix it with 0.1mL PCDA hot solution, heat and stir at 70°C for 5min, let stand for 15min and cool to room temperature. The cooled solution was placed under an ultraviolet light for 5 minutes to obtain a purple thermochromic montmorillonite-PCDA solution. The montmorillonite-PCDA solution is vacuum filtered to obtain the montmorillonite-PCDA layered composite material. Thermogravimetric analysis showed that the mass fraction of montmorillonite was 94.2%. Mechanical properties tests show that the tensile strength is...

Embodiment 3

[0043] Weigh 1.5g montmorillonite powder, dissolve in 250mL deionized water, and keep stirring for 7 days. The obtained white suspension was centrifuged twice at 2800 rpm, and the supernatant was taken to obtain a montmorillonite solution with a nominal concentration of 3.10 mg / mL.

[0044] Weigh 10 mg of PCDA, dissolve in 1 mL of 0.5 mol / L NaOH solution, and heat at 70°C for 5 min to obtain a pink colloidal solution. Take the above 6.1mL montmorillonite solution, mix it with 0.1mL PCDA hot solution, heat and stir at 70°C for 5min, let stand for 15min and cool to room temperature. The cooled solution was placed under an ultraviolet light for 5 minutes to obtain a purple thermochromic montmorillonite-PCDA solution. The montmorillonite-PCDA solution is vacuum filtered to obtain the montmorillonite-PCDA layered composite material. Thermogravimetric analysis showed that the mass fraction of montmorillonite was 94.2%. Mechanical properties tests show that the tensile strength is...

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Abstract

A method for a thermochromic bionic intelligent nanometer composite material is disclosed. In recent years, shell-simulated layered materials are research hotspots. Artificial shell materials having excellent mechanical properties can be obtained through selecting base materials and through interface designing. Montmorillonite is adopted as a base material and is composited with 10,12-pentacosadiynoic acid (PCDA) to obtain a thermochromic intelligent bionic layered montmorillonite composite material. The composite material has reversible color changes from purple to orange under a heating condition, and also has high tensile strength. The intelligent artificial shell material has a potential application prospect in the fields of sensing detection, the national defense industry, aviation and spaceflight, and other fields.

Description

technical field [0001] The invention relates to a method for a thermochromic bionic intelligent nanocomposite material, which belongs to the field of nanocomposite material preparation. Background technique [0002] After hundreds of millions of years of evolution, abalone shell has excellent mechanical properties of strong and tough integration, as the "gold standard" of bionics, it has improved new research ideas for new nanocomposite materials. A large number of studies have shown that the excellent mechanical properties of abalone shells are mainly derived from: 1) the "brick-cement" structure composed of aragonite calcium carbonate nanosheets and bio-organic matter layers composed of chitin and protein; There are different interfacial interactions between inorganic sheets and organic matter. Based on this inspiration, a lot of research work has focused on biomimetic layered nanocomposites. At present, the commonly used basic materials are montmorillonite (Science2007,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F138/00C08F2/48C08K7/00C08K3/34C08K5/544
CPCC08F2/48C08F138/00C08K3/346C08K5/544C08K7/00C08K2201/011
Inventor 程群峰彭景淞
Owner BEIHANG UNIV