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Method for preparing hydrophobic transparent vanadium dioxide thermochromic smart glass by electrospinning technology

A technology of vanadium dioxide and smart glass, applied in the field of materials, can solve problems such as the opacity of electrospun composite films, achieve the effects of improving oxidation resistance, broadening applications, and improving water resistance

Inactive Publication Date: 2018-06-15
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing hydrophobic transparent vanadium dioxide thermochromic smart glass using electrospinning technology, combining the method of solvent filling with electrospinning technology, and using suitable electrospun composite fiber membranes with opaque thickness to obtain Filled with solvent to obtain hydrophobic transparent vanadium dioxide thermochromic smart glass, which is simple and effective, greatly broadens the application of electrospun materials in optical materials, provides a new idea for smart energy-saving windows, and solves the problem of existing electrospun composite films. The problem of opacity makes up for the defect that electrospun materials are not suitable for optical applications

Method used

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  • Method for preparing hydrophobic transparent vanadium dioxide thermochromic smart glass by electrospinning technology
  • Method for preparing hydrophobic transparent vanadium dioxide thermochromic smart glass by electrospinning technology
  • Method for preparing hydrophobic transparent vanadium dioxide thermochromic smart glass by electrospinning technology

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Embodiment 1

[0032] 0.5wt% VO 2 Added to DMF, sonicated for 1h. After stirring at room temperature for 2 h, 20 wt% PMMA was added. Stirring was continued for 6 h to obtain a uniform gray-black electrospinning precursor solution. Adjust the parameters of the electrospinning process: the voltage is 15kV; the receiving distance is 15cm; the solution pushing speed is 0.5ml / h, the glass is used as the receiving substrate, the solution is electrospun, and the sample is received after 72h to obtain the electrospun composite fiber membrane. The diameter of the composite fiber membrane fiber is 500 nm. Its SEM picture is as follows figure 1 shown. Fill the obtained composite fiber membrane with DMF, and then treat it in an oven at 40°C for 6 hours to obtain a VO with a transmittance of 93%. 2 Thermochromatic smart glass. Comparison of the state before and after the electrospun composite fiber membrane is filled with solvent image 3 shown. It can be seen from the figure that it is opaque be...

Embodiment 2

[0036] 2wt%VO 2 Added to DMF, sonicated for 2h. After stirring at room temperature for 2 h, 20 wt% PMMA was added. Stirring was continued for 6 h to obtain a uniform gray-black electrospinning precursor solution. Adjust the parameters of the electrospinning process: the voltage is 20kV; the receiving distance is 15cm; the solution pushing speed is 5ml / h, the solution is electrospun with glass as the receiving substrate, and the sample receiving is completed after 6h. Fill the obtained composite fiber membrane with DMF, and then treat it in an oven at 60°C for 24 hours to obtain a VO with a transmittance of 75%. 2 Thermochromatic smart glass.

Embodiment 3

[0038] 10wt%VO 2 Added to DMF, sonicated for 6h. After stirring at room temperature for 2 h, 20 wt% PMMA was added. Stirring was continued for 6 h to obtain a uniform gray-black electrospinning precursor solution. Adjust the parameters of the electrospinning process: the voltage is 20kV; the receiving distance is 15cm; the solution pushing speed is 1ml / h, and the glass is used as the receiving substrate for electrospinning, and the sample receiving is completed after 6h. Fill the obtained composite fiber membrane with DMF, and then treat it in an oven at 60°C for 12 hours to obtain a VO with a transmittance of 50%. 2 Thermochromatic smart glass.

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Abstract

The invention discloses a method for preparing hydrophobic transparent vanadium dioxide thermochromic smart glass by an electrospinning technology. The method comprises (1) adding vanadium dioxide nano-powder into a solvent, carrying out ultrasonic dispersion for 1 to 6 hours, then adding a polymer into the dispersion, and carrying out stirring until complete dissolution to obtain an electrospinning solution, (2) carrying out electrospinning through glass as a receiving substrate and an electrospinning solution obtained in the step (1) to obtain an electrospun composite fiber membrane, and (3)filling the electrospun composite fiber membrane obtained in the step (2) with a solvent and carrying out drying to obtain hydrophobic transparent vanadium dioxide thermochromic smart glass. Throughcombination of the solution filling method and an electrospinning method, the hydrophobic transparent vanadium dioxide thermochromic smart glass is obtained. The method is simple and effective, greatly broadens the application of the electrospinning material in optical materials, provides a new idea for the intelligent energy-saving window, solves the problem that the existing electrospun composite film is non-transparent and makes up for the defects that the electrospun material is not suitable for the field of optics.

Description

Technical field: [0001] The invention relates to the field of materials, in particular to a method for preparing hydrophobic transparent vanadium dioxide thermochromic smart glass by using electrospinning technology. Background technique: [0002] Vanadium dioxide (VO 2 ) is a transition metal oxide, which can undergo a reversible insulating-metal phase transition at 68°C, from a semiconducting monoclinic phase (M phase) to a metallic state (R phase), and the optical properties will change abruptly with the phase transition . VO at low temperature 2 It is an insulating state with high infrared transmittance. It is in a metallic state at high temperature, and the infrared transmittance is low, but the visible light transmittance is almost unchanged. Therefore, VO 2 It can automatically adjust the heat generated by sunlight according to the temperature, and is an ideal intelligent energy-saving window material. [0003] Currently preparing VO 2 The methods of thermochro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00D04H1/728
CPCC03C17/009C03C2217/93C03C2218/32D04H1/728
Inventor 肖秀娣徐刚陆源郇昌梦程浩亮詹勇军
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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