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Polyimide nano-fiber and preparation method thereof

A nanofiber and polyimide technology, applied in fiber treatment, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of polyimide without fluorescence effect and coarse particle size, and achieve excellent fluorescence effect and Heat-resistant stability, low decomposition temperature effect

Inactive Publication Date: 2009-12-16
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyimide prepared by the above method has no fluorescence effect, and the particle size is relatively coarse

Method used

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  • Polyimide nano-fiber and preparation method thereof
  • Polyimide nano-fiber and preparation method thereof
  • Polyimide nano-fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] By weight, dissolve 1 part of 4,4'-diaminodiphenyl ether (ODA) in 4 parts of N,N-dimethylacetamide (DMAC) solvent, stir until ODA is completely dissolved in DMAC, and react Temperature at room temperature (about 0-10°C), add 1.025 parts of pyromellitic anhydride (PDMA) in four times, with an interval of half an hour between each addition. After the PDMA was added completely, a polyamic acid solution was obtained; 3 wt% of europium oxide based on the weight of the polyamic acid solution was added to continue the reaction. When the viscosity of the reaction system increases suddenly, it indicates that the system reaches the equivalence point, and the reaction is continued for 2 hours until the viscosity of the system is stable, and a PAA / europium oxide solution is obtained.

[0022] The above solution was injected into the spinning solution container of the electrospinning machine, the spinning temperature was room temperature, the output voltage of the high voltage power...

Embodiment 2

[0027] Add the europium oxide particles into the coupling agent solution, wherein the ratio of the europium-containing oxide particles to the coupling agent is 1:5g / ml, react under magnetic stirring, and dry naturally until the solvent evaporates after the reaction is completed. drying in an oven to obtain coupled surface-modified europium-containing oxide particles; the coupling agent is one or a combination of organic silane coupling agents and titanate coupling agents.

[0028] By weight, 1 part of 4,4'-diaminodiphenyl ether (ODA) was dissolved in 43 parts of N,N-dimethylacetamide (DMAC) solvent, stirred until ODA was completely dissolved in DMAC; reaction Temperature at room temperature (about 0-10°C), add 1.025 parts of pyromellitic anhydride (PDMA) in four times, with an interval of half an hour between each addition. After the PDMA was added completely, 1 wt% europium oxide treated with a coupling agent was added to continue the reaction. When the viscosity of the reac...

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Abstract

The invention relates to a polyimide nano-fiber and a preparation method thereof. The invention adopts the technical scheme that 4,4'-oxydianiline (ODA) and pyromellitic dianhydride (PMDA) are used as polycondensation monomers to synthesize a polyamic acid (PAA) solution; in the reaction process, europium oxide which is processed by a coupling agent and has fluorescent effect is added, and then, the PAA / europium oxide nano-fiber is prepared by using the electrostatic spinning technology, wherein the fiber diameter can be controlled to be between 50 and 200nm; and then, the PAA / europium oxide nano-fiber is put in an oven to be heated gradually for imidization to enable the PPA / europium oxide to carry out polycondensation, thereby generating the polyimide nano-fiber with the fluorescent effect. The application of the polyimide in the high-technology fields, such as anti-falsification certificates, bills, aerospace, microelectronics and the like is extended.

Description

technical field [0001] The invention relates to the preparation of a polymer electrostatic spinning nanofiber, in particular to a polyimide nanofiber material with a fluorescent effect and an electrostatic spinning method thereof, belonging to the technical field of polymer materials. Background technique [0002] Polyimide is a kind of high polymer with imide ring as the characteristic structure. It is the only variety among many heterocyclic polymers that has been accepted by the industry and has reached the output of 10,000 tons. Its reliability has been recognized by half Proven by the practice of the century. At the same time, polyimide is one of the polymer materials with the highest heat resistance level in industrial applications so far, and has excellent properties such as flame retardancy, insulation, and heat resistance. Fluorescent nanofibers or non-woven fabrics are mainly used in the field of clothing and decoration, such as fluorescent uniforms for the police...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/10D01D5/00C09K11/78
Inventor 范丽娟程丝田新光沈德志蒋峰峰
Owner SUZHOU UNIV
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