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Method for preparing organic photochromic nanofibers

A photochromic and nanofiber technology, applied in fiber processing, spinning solution preparation, filament/thread forming, etc., can solve the problems of low color fastness to washing and reduced discoloration effect of photochromic printing, to overcome the problems of photochromic printing. Low color fastness to washing, overcoming the effect of retarding photochromic discoloration reaction

Inactive Publication Date: 2011-05-25
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the color fastness to washing of photochromic printing is low and photochromic is limited by the transparency of the coating, which reduces the discoloration effect, so it cannot meet the needs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of spinning solution: take 2.5 grams of polymethyl methacrylate (PMMA) resin, dissolve in chloroform (CHCl 3) ) and N, N-dimethylformamide (DMF), chloroform and N, N-dimethylformamide in a mixed solution with a volume ratio of 15:1, stirring and dissolving and standing still to obtain a uniform transparent mass percentage 5% PMMA solution. A certain amount of organic photochromic diarylethene compound was dissolved in the mixed solution of PMMA, stirred at room temperature for 2 hours, and then left to stand.

[0021] (2) Preparation of composite nanofibers: Electrospinning technology was used to spin the PMMA solution of the above-mentioned organic photochromic diarylethene compound to prepare organic photochromic compound / PMMA composite nanofibers. The technical parameters are: DC voltage 6kV, nozzle inner diameter 0.6mm, curing distance from nozzle to receiving screen 12cm, room temperature 25°C.

[0022] The above-mentioned organic photochromic nan...

Embodiment 2

[0024] (1) Preparation of spinning solution: 7.5 grams of polystyrene (PS) resin was weighed, dissolved in DMF, stirred and dissolved, and left to stand to obtain a homogeneous transparent PS solution with a concentration of 15% by mass. A certain amount of organic photochromic spirooxazine compound was dissolved in PS, stirred at room temperature for 2 h, and then left to stand.

[0025] (2) Preparation of composite nanofibers: Electrospinning technology was used to spin the above-mentioned PS solution of the organic photochromic spirooxazine compound to prepare organic photochromic spirooxazine compound / PS nanofibers. The technical parameters are: DC voltage 15kV, nozzle inner diameter 0.6mm, angle between nozzle and horizontal plane 15°, curing distance from nozzle to receiving screen 20cm, room temperature 25°C.

[0026] The above-mentioned organic photochromic nanofiber prepared is colorless; it can be observed to turn blue immediately under ultraviolet light irradiation ...

Embodiment 3

[0028] (1) Preparation of spinning solution: Weigh 5 grams of polyvinylpyrrolidone (PVP) resin, dissolve it in dimethyl sulfoxide, stir and dissolve, then let stand to obtain a PVP solution with a uniform transparent mass percentage concentration of 10%. A certain amount of organic photochromic spiropyran compound was dissolved in PVP, stirred at room temperature for 2 hours, and then left to stand.

[0029] (2) Preparation of composite nanofibers: Electrospinning technology was used to spin the above-mentioned PVP solution of organic photochromic compounds to prepare organic photochromic spiropyran compound / PVP nanofibers. The technical parameters are: DC voltage 10kV, the inner diameter of the nozzle is 1.2mm, the angle between the nozzle and the horizontal plane is 30°, the curing distance from the nozzle to the receiving screen is 20cm, and the room temperature is 25°C.

[0030] The organic photochromic nanofiber of above-mentioned preparation is colorless; It can be obser...

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Abstract

The invention relates to a method for preparing organic photochromic nanofibers, and the method comprises the following steps: dissolving organic photochromic compounds into a polymer solution so as to obtain a spinning solution; and preparing the spinning solution into nanofibers by using an electrostatic spinning technology, wherein the organic photochromic materials are spirooxazine type, spiropyrane type, diarylethene type, fulgide type and azo dye type photochromic materials, and the like; and the polymer materials refer to polyvinylpyrrolidone resins, polystyrene resins, polymethylmethacrylate resins, polyvinyl alcohol, polyethylene terephthalate (PET) resins and the like. The organic photochromic nanofibers prepared by the method provided by the invention have high sensitivity and excellent endurance performance, and can be applied to clothing materials for garments, shoes and hats, daily fabrics for fabrics and carpets, polymer fibers for cosmetics, discoloration windows, displays, chemical sensors and optical storage devices; and in the military field, the prepared organic photochromic nanofibers can be used for battle fatigues, tents, military machinery, and the like.

Description

technical field [0001] The invention relates to a method for preparing nanofibers, in particular to a method for preparing organic photochromic nanofibers. Background technique [0002] Organic photochromic material is a new type of functional material. Due to its reversible color change under the action of light, it is used in high-density optical information storage equipment, holographic anti-counterfeiting, nonlinear optical equipment, camouflage and concealment in military affairs. It has a wide range of application values ​​in the manufacture of writing materials and civilian commodities (textiles, optical lenses, etc.), and its potential applications are constantly expanding to fields such as molecular switches, biological probes, and biological supramolecules. [0003] Structurally, it can be divided into the following categories: fulgid anhydride type, spiropyran, spirooxazine type, azo dye type, diarylethene derivative type, phenoxy naphthoquinone type, etc. The p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/56D01F6/52D01F1/10D01D1/02D01D5/00
Inventor 盛小海吴娟娟洪月陈超
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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