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A thermal or solvent dual stimulus color change response nanofiber membrane and its preparation method and application

A nanofiber membrane, nanofiber technology, applied in the chemical characteristics of fibers, rayon manufacturing, textiles and papermaking, etc., can solve the problems of easy oxidative cycle performance, limited practical use, cumbersome preparation steps, etc. Low, good application prospects

Active Publication Date: 2022-06-07
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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  • A thermal or solvent dual stimulus color change response nanofiber membrane and its preparation method and application
  • A thermal or solvent dual stimulus color change response nanofiber membrane and its preparation method and application
  • A thermal or solvent dual stimulus color change response nanofiber membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A preparation method of a thermal or solvent dual stimulus color change response nanofiber membrane, 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 an aqueous solution of cobalt acetate; 133 mg of potassium cobalt cyanide was dissolved in 20 mL of deionized water to obtain an aqueous solution of cobalt potassium cyanide. The above-mentioned cobalt acetate aqueous solution was added to the cobalt potassium cyanide aqueous solution, stirred for 3 minutes under magnetic stirring and mixed uniformly, and then the mixed solution was placed in a 25°C water bath for aging for 18 hours; after the reaction, the solid was collected by centrifugation and washed with water three times. After drying at 70°C, Co-PBA nanoparticles were obtained.

[0056] (2) Preparation of spinning solution

[0057] Disperse 0.35g of Co-PBA nanoparticles prepared in step (1) in 4.5g of ...

Embodiment 2

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

[0068] The SEM photo of Co-PBA / PAN prepared in Example 2 is as follows Figure 7 shown, 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 preparation method of a heat or solvent dual stimulus color change response nanofiber membrane, as described in Example 1, the difference is: the amount of Co-PBA added in step (2) is 0.15g; other steps and conditions and Example 1 Consistent.

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

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Abstract

The invention provides a thermal or solvent double-stimulated discoloration-responsive nanofiber membrane, a preparation method and application thereof. In the invention, the Prussian blue analogue is firstly prepared, and then the nanofibrous membrane is prepared by electrospinning with the polymer compound polyacrylonitrile. The inorganic stimuli-responsive color-changing material of the present invention has the advantages of easy synthesis, low toxicity, and high stability. The invention realizes the effective combination of the color-changing material and electrospinning, and can directly prepare a composite nanofiber film with good self-support and flexibility. It is conducive to its subsequent application; the obtained fiber film has the advantages of fast color response to heat and solvent dual stimulation and good reusability, and can be used in fields such as anti-counterfeiting and secret communication.

Description

technical field [0001] The invention relates to a thermal or solvent dual stimulus color change response nanofiber membrane, a preparation method and application thereof, and belongs to the field of stimulus color change response materials. Background technique [0002] Stimuli-color-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 excite the reversible color transition of materials mainly include light, heat, electricity, water vapor, solvent, mechanical force, acid-base, etc. Nowadays, many important achievements have been made in stimuli-color-responsive materials, which 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-re...

Claims

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Application Information

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Patent Type & Authority Patents(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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