Self-early-warning coaxial electrostatic spinning fiber as well as preparation method and application thereof

A coaxial electrospinning and electrospinning technology, which is applied in electrospinning, fiber treatment, fiber chemical characteristics, etc., can solve problems such as damage to comprehensive performance, material catastrophic damage, shortened service life, etc., and achieve broad application prospects , Improve the fracture strength, improve the effect of mechanical properties

Pending Publication Date: 2022-06-03
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, man-made materials are susceptible to damage, especially at the microscopic scale, which can seriously impair their comprehensive properties, shorten their service life and ultimately lead to catastrophic failure of the material
The detection of small damages inside the material is carried out by specialized equipment, whereas the coatings normally used cannot report the presence of defects by themselves

Method used

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  • Self-early-warning coaxial electrostatic spinning fiber as well as preparation method and application thereof
  • Self-early-warning coaxial electrostatic spinning fiber as well as preparation method and application thereof
  • Self-early-warning coaxial electrostatic spinning fiber as well as preparation method and application thereof

Examples

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Effect test

preparation example Construction

[0027] The present invention further provides a method for preparing self-warning coaxial electrospinning fibers, and the specific implementation steps are as follows:

1) Preparation of A component coaxial shell solution: The polymer 1, the polymer 2, the solvent 1, and the solvent 2 are prepared according to the mass ratio of 0.2-1:0.5-5:9-15:9-15, The order of addition of the drugs is as follows:

1.1) Polymer 1 and solvent 1 are mixed first, and stirred at a speed of 200-8000 rmp for 12-24 hours within a temperature range of 20-35 °C;

1.2) Mix the polymer 2 with the solvent 2, and stir at a speed of 300-800rmp for 14-36 hours within the temperature range of 50-100°C;

1.3) Mix the above two solutions in a ratio of 6:1-4, and stir at 20-35°C for 2-10 hours;

2) Preparation of B-component coaxial core solution: Weigh the indicator and solvent according to the mass ratio of 1:5-20, and stir at a speed of 200-8000rmp for 2-10 hours within the temperature range of 20-25°C. ;...

Embodiment 1

A self-warning coaxial electrospinning fiber provided by the present invention comprises a component A shell structure and a component B core structure loaded inside the shell structure,

Specific steps are as follows:

1) Preparation of the coaxial shell solution of component A: The polymer 1, polymer 2, solvent 1 and solvent 2 are prepared according to the mass ratio of 0.3:1:15:10. The order of adding the drugs is as follows:

1.1) Dissolve 3g of chitin (CS) in 150mL of 2% acetic acid aqueous solution and stir magnetically for 14 hours until uniformly dissolved;

1.2) Dissolve 1 g of polyvinyl alcohol (PVA) in 10 mL of deionized water, heat it in a 95°C water bath, and stir magnetically for 16 hours until it is completely dissolved;

1.3) Mix the above two solutions in a ratio of 6:4, and stir at 25°C for 3 hours;

2) Preparation of the B-component coaxial core solution: add 1 g of phenanthroline (Phen) to 10 mL of deionized water, and stir for 5 hours at a temperature of ...

Embodiment 2

A self-warning coaxial electrospinning fiber provided by the present invention comprises a component A shell structure and a component B core structure loaded inside the shell structure,

Specific steps are as follows:

1) Preparation of the coaxial shell solution of component A: The polymer 1, polymer 2, solvent 1, and solvent 2 are prepared according to the mass ratio of 0.3:1:15:10. The order of adding the drugs is as follows:

1.1) Dissolve 3g of chitin (CS) in 150mL of 2% acetic acid aqueous solution and stir magnetically for 14 hours until uniformly dissolved;

1.2) Dissolve 1 g of methylcellulose (MC) in 10 mL of deionized water, heat it in a water bath at 80°C, and stir magnetically for 16 hours until it is completely dissolved;

1.3) Mix the above two solutions in a ratio of 6:2 and stir at 25°C for 5 hours;

2) Preparation of the B-component coaxial core solution: add 1 g of phenanthroline (Phen) to 10 mL of deionized water, and stir for 5 hours at a temperature of ...

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Abstract

The invention provides a preparation method and application of a self-early-warning coaxial electrostatic spinning fiber. Comprising the following steps: respectively adding chitosan and polyvinyl alcohol into a solvent, and dissolving to obtain two solutions; mixing the two solutions according to a certain proportion to obtain a shell solution, and preparing the film by taking the indicator solution as a core solution and adopting a coaxial electrostatic spinning method. And loading the self-early-warning fiber into the resin to obtain the self-repairing coating with the self-early-warning function. According to the invention, the loading stability and uniformity of the indicator in coaxial fibers can be effectively improved. The Q235 steel is used as a research substrate, when the coating is damaged, the indicator in the coaxial fiber is released and is combined with iron ions on the metal surface, obvious color change is generated, and a damage early warning function is achieved. Meanwhile, indicator molecules can form a dense film on the surface of steel to prevent corrosion of a base material. The composite coating based on the self-early-warning coaxial fiber has the functions of indicating and repairing damage, and has huge potential in practical application of material protection.

Description

technical field [0001] The invention relates to the technical field of preparation of coaxial electrospinning fibers, in particular to a self-warning coaxial electrospinning fiber, a preparation method and application thereof, and belongs to the field of self-healing anti-corrosion coatings. Background technique [0003] Under the marine environment, the corrosion of engineering materials has become one of the technical bottlenecks that seriously restrict the development of major marine engineering technologies and equipment, and its failure problem has seriously affected the reliability and life of marine engineering equipment. Organic coatings are widely used to protect engineering equipment operating in a variety of environments from corrosion. Such coatings can provide good protection for a certain period of time, but most of them fail prematurely due to corrosion, resulting in serious consequences and high cost losses. Therefore, detecting the onset of corrosion earl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D5/34B05D5/00B05D7/14B05D7/24D01F8/10D01F8/18D01F8/02C09D163/00C09D167/08C09D175/04C09D133/00C09D5/08C09D7/65
CPCD01D5/0015D01D5/003D01D5/0069D01D5/0076D01D5/0092D01D5/34B05D5/00B05D7/14B05D7/24D01F8/10D01F8/18D01F8/02C09D163/00C09D167/08C09D175/04C09D133/00C09D5/08C09D7/65C09D7/70B05D2202/10C08L5/08C08L29/04
Inventor 王巍曹琳秦绪德王通朴金明陈守刚
Owner OCEAN UNIV OF CHINA
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