Thermal or solvent dual-stimulus color-changing response nanofiber membrane and preparation method and application thereof

A nanofiber film and nanofiber technology, which is applied in the fields of fiber chemical characteristics, rayon manufacturing, textiles and papermaking, etc., can solve the problems of easy oxidation cycle performance, limited practical use, cumbersome preparation steps, etc., and achieves benefits for subsequent applications. Low, good application prospects

Active Publication Date: 2021-03-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the organic color-changing material has problems such as high material cost, easy oxidation, and poor cycle performance; and the inventive material also involves organic synthesis, and the preparation steps are cumbersome and not conducive to environmental protection; and the obtained material is in powder form and needs to be spin-coated and other means to prepare thin films, which greatly limits its practical use

Method used

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  • Thermal or solvent dual-stimulus color-changing response nanofiber membrane and preparation method and application thereof
  • Thermal or solvent dual-stimulus color-changing response nanofiber membrane and preparation method and application thereof
  • Thermal or solvent dual-stimulus color-changing response nanofiber membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method for preparing a nanofibrous membrane in response to dual stimulation of heat or solvent, the steps are as follows:

[0054] (1) Preparation of Co-PBA

[0055] 149.5 mg of cobalt acetate tetrahydrate was dissolved in 20 mL of deionized water to obtain a cobalt acetate aqueous solution; 133 mg of potassium cobalt cyanide was dissolved in 20 mL of deionized water to obtain an aqueous solution of potassium cobalt cyanide. Add the above cobalt acetate aqueous solution into the potassium cobalt cyanide aqueous solution, stir under magnetic stirring for 3 minutes and mix evenly, then place the mixed solution in a water bath at 25°C for aging for 18 hours; after the reaction, collect the solid by centrifugation and wash it with water three times Finally, dry at 70°C to obtain Co-PBA nanoparticles.

[0056] (2) Preparation of spinning solution

[0057] Disperse 0.35g of Co-PBA nanoparticles prepared in step (1) in 4.5g of N,N-dimethylformamide solution, then add 0.5g ...

Embodiment 2

[0067] A kind of preparation method of thermal or solvent dual stimulus color change response nanofiber membrane, as described in Example 1, the difference is: the addition of Co-PBA in step (2) is 0.25g; other steps and conditions and Example 1 unanimous.

[0068] The SEM photograph of the Co-PBA / PAN that present embodiment 2 makes is as follows Figure 7 indicated by Figure 7 It can be seen that the Co-PBA / PAN nanofibers prepared in Example 2 have a uniform diameter, with an average diameter of 350 nm.

Embodiment 3

[0070] A method for preparing nanofiber membranes in response to heat or solvent dual stimulus discoloration, as described in Example 1, the difference is: the amount of Co-PBA added in step (2) is 0.15g; other steps and conditions are the same as in Example 1 unanimous.

[0071] The SEM photograph of the Co-PBA / PAN that present embodiment 3 makes is as Figure 8 shown by Figure 8 It can be seen that the Co-PBA / PAN nanofibers prepared in Example 3 have a uniform diameter, with an average diameter of 200 nm.

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Abstract

The invention provides a thermal or solvent dual-stimulus color-changing response nanofiber membrane and a preparation method and application thereof. The preparation method comprises the following steps that a Prussian blue analogue is prepared firstly, and then electrostatic spinning is carried out on the Prussian blue analogue and a high-molecular compound polyacrylonitrile to obtain the nanofiber membrane. The inorganic stimuli-responsive color-changing material has the advantages of being easy to synthesize, low in toxicity and high in stability. Effective combination of the color-changing material and electrostatic spinning is achieved, the composite nanofiber membrane with good self-supporting performance and flexibility can be directly prepared, and subsequent application of the composite nanofiber membrane is facilitated. The obtained fiber membrane has the advantages of rapid color response to thermal and solvent dual stimulation, good reusability and the like, and can be used in the fields of anti-counterfeiting, secret communication and the like.

Description

technical field [0001] The invention relates to a thermal or solvent dual stimulus color change response nanofiber film and its preparation method and application, belonging to the field of stimulus color change response materials. Background technique [0002] Stimulus color-changing responsive materials refer to materials that produce color changes under the action of various chemical or physical stimuli in the external environment. The external stimuli used to stimulate the reversible color change of materials mainly include light, heat, electricity, water vapor, solvent, mechanical force, acid-base, etc. Today, stimuli-color-responsive materials have achieved many important results, and have shown great research and application value in the fields of sensors, information storage materials, information display devices, smart windows, security and anti-counterfeiting, and rewriting paper. [0003] Chinese patent document CN 107163080 A discloses a stimuli-responsive triph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382D04H1/728D04H1/43D01F6/54D01F1/10
CPCD04H1/4382D04H1/43D04H1/728D01F6/54D01F1/10
Inventor 李澄仵菁菁
Owner SHANDONG UNIV
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