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Method for preparing reversible discolouring membrane made from polyaniline composite nanofiber

A composite nanofiber and polyaniline technology, which is applied in fiber treatment, spinning solution preparation, conjugated synthetic polymer artificial filament, etc., can solve the problems of poor dispersion, poor processing performance, and low mechanical strength, and achieve Uniform color rendering, improved mechanical properties, and high color saturation

Inactive Publication Date: 2012-09-05
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a preparation method of polyaniline composite nanofiber reversible color-changing film, to solve the problems of poor processing performance, low mechanical strength and poor dispersion of the above-mentioned polyaniline nano-film material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] At room temperature of 25°C, 0.02g of polyaniline (molecular weight: 65,000) was stirred and dissolved in 9.93g of formic acid and acetic acid mixed solvent (weight ratio: 5:1) in a stirred tank at a speed of 50rpm. After the polyaniline was completely dissolved, the Add 0.05 g of polyacrylamide (molecular weight: 2,000,000) to the solution, and stir at a rotation speed of 200 rpm to obtain a blended spinning solution with a mass fraction of polyaniline of 0.2% and a mass fraction of polyacrylamide of 0.5%. Under the conditions of room temperature 25°C and humidity 30%, the blended spinning solution solution was input to the spinneret at a flow rate of 1.5mL / h, and at the same time, the spinneret was connected to a 20kV power supply for electrospinning to prepare polyaniline / polypropylene Amide blended nanofibers; deposit the spun fibers on the aluminum foil receiving device, the distance between the receiving device and the spinneret is 10cm; after the spinning is compl...

Embodiment 2

[0020] At room temperature of 25°C, dissolve 0.5g of polyaniline (molecular weight: 65,000) in 8.5g of formic acid in a stirred tank at a speed of 100rpm. After the polyaniline is completely dissolved, add 1g of ethyl cellulose (molecular weight: 200,000) to the solution , and stirred at a rotational speed of 400 rpm to obtain a blended spinning solution with a mass fraction of polyaniline of 5% and a mass fraction of ethyl cellulose of 10%. Under the conditions of room temperature 25°C and humidity 42%, the blended spinning solution was input to the spinneret at a flow rate of 1.2mL / h, and at the same time, the spinneret was connected to an 18kV power supply for electrospinning to prepare polyaniline / ethyl fibers Plain blended nanofibers; the spun fibers are deposited on the copper mesh receiving device, the distance between the receiving device and the spinneret is 15cm; after the spinning is completed, the copper mesh is placed in a vacuum oven and dried at 55°C After 8 hou...

Embodiment 3

[0022] At room temperature of 25°C, 1.5g of polyaniline (molecular weight: 65,000) was stirred and dissolved in 7g of formic acid and acetic acid mixed solvent (mass ratio: 10:1) in a stirred tank at a speed of 200rpm. 1.5 g of nylon 6 (molecular weight: 180,000) was added to the mixture, and stirred at a rotation speed of 500 rpm to obtain a blended spinning solution with a mass fraction of polyaniline of 15% and a mass fraction of nylon 6 of 15%. Under the conditions of room temperature 25°C and humidity 33%, the blended spinning solution was input to the spinneret at a flow rate of 0.4mL / h, and at the same time, the spinneret was connected to a 30kV power supply for electrospinning to prepare polyaniline / nylon 6 co- Mix nanofibers; deposit the spun fibers on the aluminum foil receiving device, the distance between the receiving device and the spinneret is 16cm; after the spinning is completed, put the aluminum foil in a vacuum oven to dry at 55°C for 6h, and finally A green...

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Abstract

The invention relates to a method for preparing a reversible discolouring membrane made from polyaniline composite nanofiber, which is characterized by comprising the following steps: dissolving an eigenstate polyaniline raw material in a stirred tank at room temperature to obtain polyaniline solution with a mass fraction of 0.2-15%; adding blending polymer to polyaniline solution at room temperature, evenly blending the mixture to obtain solution with the mass fraction of the blending polymer being 0.5-30%; inputting the solution to a spinning nozzle of an electrostatic spinning device at a flow velocity of 0.1-4mL / h at room temperature and a relative humidity of 20-60% for carrying out electrostatic spinning to prepare the nanometer composite fibre; and drying the nanofiber membrane obtained from a receiving device for 1-12h at 25-80 DEG C to obtain the reversible discolouring membrane made from polyaniline composite nanofiber. The invention features simple preparation process, low cost and good mechanical property, high flexibility, good corrosion resistance and uniform colour of the polyaniline composite nanofiber.

Description

technical field [0001] The invention relates to a preparation method of a polyaniline composite nanofiber reversible color-reversing film, belonging to the technical field of nano functional materials. Background technique [0002] Conductive polymers have electrical and optical properties different from general polymer materials, as well as mechanical and processing properties different from metals and inorganic materials, and are gradually becoming a new hotspot in materials research. Among many conductive polymers, polyaniline has attracted extensive attention due to its advantages such as easy availability of raw materials, simple synthesis, high temperature resistance, and good oxidation resistance. It is currently recognized as one of the most promising conductive polymer materials. In addition to outstanding electrical properties, polyaniline also has a unique doping mechanism, excellent physical and chemical properties, good light and thermal stability, especially un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08J5/18D01F8/16D01D1/02D01D5/00
Inventor 丁彬斯阳俞建勇孙刚
Owner DONGHUA UNIV
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