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Preparation method of force-responsive surface wrinkles with adjustable light transmittance

A light transmittance and wrinkle technology, applied in the field of smart materials, can solve the problems of increasing the difficulty of operation, unable to control the optical properties of materials, etc., and achieve the effects of wide application range, good reversibility, and simple operation.

Active Publication Date: 2020-08-11
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method successfully prepares regular wrinkles below 500nm, but the wrinkles in this size range cannot regulate the optical properties of the material itself, and the elastic substrate needs to be stretched to grow the surface material in the preparation process, which increases the preparation process. Difficulty of operation

Method used

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  • Preparation method of force-responsive surface wrinkles with adjustable light transmittance
  • Preparation method of force-responsive surface wrinkles with adjustable light transmittance

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for preparing force-responsive PVA / PDMS membrane folds, comprising the following steps:

[0032] (1) Mix the polydimethylsiloxane precursor and the crosslinking agent uniformly at a mass ratio of 10:1, take 9g of the mixed solution and pour it into a 90mm petri dish, remove air bubbles in a vacuum, and heat and cure at 80°C for 2h. Obtain polydimethylsiloxane elastic base;

[0033] Put the above cured polydimethylsiloxane into O 2 Oxidation treatment in the chamber of the plasma etching machine, the working conditions are: the oxygen flow rate is 10ml / min, the radio frequency power is 100W, and the etching time is 20s;

[0034] 3g of 3wt% polyvinyl alcohol (PVA) aqueous solution was drop-coated on the etched polydimethylsiloxane, shaken well and vacuumed to remove air bubbles and dried at 50°C to form a film. The prepared double-layer The film is in a transparent state; placed in a room temperature environment with a relative humidity RH=50% for 1h;

[0035]...

Embodiment 2

[0037] A method for preparing force-responsive PVA / PDMS membrane folds, comprising the following steps:

[0038] (1) Mix the polydimethylsiloxane precursor and the crosslinking agent uniformly at a mass ratio of 10:1, take 9g of the mixed solution and pour it into a 90mm petri dish, remove air bubbles in a vacuum, and heat and cure at 80°C for 2h. Obtain polydimethylsiloxane elastic base; Put the above-mentioned solidified polydimethylsiloxane into O 2 Oxidation treatment in the chamber of the plasma etching machine, the working conditions are: the oxygen flow rate is 10ml / min, the radio frequency power is 100W, and the etching time is 20s;

[0039] 0.09g of 3wt% polyvinyl alcohol aqueous solution was drop-coated on the etched polydimethylsiloxane, shaken well, vacuumed out air bubbles, and then dried at 50°C to form a film. The prepared double-layer film was Transparent state; after being placed in a room temperature environment with RH=70% for 1 hour;

[0040] (2) Cut out ...

Embodiment 3

[0042] A method for preparing force-responsive polyvinylpyrrolidone / PDMS membrane folds, comprising the following steps:

[0043] (1) Evenly mix the polydimethylsiloxane precursor and the crosslinking agent at a mass ratio of 10:1, take 4.4g of the mixed solution and pour it into a 60mm petri dish, remove air bubbles in a vacuum and heat and cure at 80°C for 2h , to obtain polydimethylsiloxane elastic base; put the cured polydimethylsiloxane into O 2 Oxidation treatment in the chamber of the plasma etching machine, the working conditions are: the oxygen flow rate is 10ml / min, the radio frequency power is 100W, and the etching time is 20s;

[0044] Put 0.1g of polyvinyl chloride powder solvent in 5ml of dimethylacetamide solution, take 1g of the mixed solution and drop it on the etched polydimethylsiloxane, shake it well, remove air bubbles in vacuum, and dry at 50°C Film formation, the prepared double-layer film is in a transparent state, after being placed in a room temperat...

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Abstract

The invention relates to a preparation method of force response type surface folds with adjustable light transmittance. The method comprises the steps as follows: performing oxygen plasma etching on atransparent elastic substrate to form a hydrophilic layer; coating the surface of the etched elastic substrate with a rigid composite film solution, and drying the surface to form a film; releasing stress after stretching the prepared double-layer film. Regular folds on the surface of a material are obtained with the method. The hydrophilic property of the elastic substrate is changed through ionetching, the folds with regular shapes are formed through pre-stretching after the surface is coated with the rigid molecular solution and the film is formed, the transmittance of the folds for visible light is measured by applying different strains to the folds, and reversible transformation of regulating the light transmittance of the fold surfaces in the large range of 6%-90% is realized. Theoperation method is wide in application range, simple to operate, good in reversibility and capable of realizing large-area preparation and has potential application value in the intelligent window field.

Description

technical field [0001] The design of the present invention involves a universal method for preparing force-responsive regular material surface folds, and using stress to change the surface fold shape of the material, so as to achieve the purpose of regulating and controlling the visible light transmittance in a large range (6%-90%) , belonging to the field of smart materials. Background technique [0002] Wrinkles on the surface of the material have a strong scattering effect on light. By changing the surface wrinkle morphology, the light transmittance of the material itself can be effectively adjusted. Using stress to change the surface morphology of the material has the ability to control the number, direction, and strain of the surface wrinkles of the material. Time and other advantages have important applications in the field of smart windows. [0003] In 1998, Ned Bowden et al. first proposed the method of preparing wrinkles on polydimethylsiloxane (PDMS), by depositin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/12C08J7/046C08L83/04
CPCC08J7/0427C08J7/123C08J2383/04C08J2401/28C08J2427/06C08J2429/04
Inventor 王文寿姜宝来刘伦涛高宗朋
Owner SHANDONG UNIV
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