Method for preparing photo-thermal fibers through microfluid air jet spinning

A photothermal fiber and microfluidic technology, applied in fiber processing, textile and papermaking, filament/thread forming, etc., can solve the problems of only 60% photothermal conversion efficiency, cumbersome preparation process, low safety factor, etc. Excellent evaporation performance, simple synthesis method, green material effect

Inactive Publication Date: 2021-05-28
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most photothermal fibers are prepared by dry-wet spinning or electrospinning. The preparation process is cumbersome, involves high voltage, low safety factor, small output and only 60% photothermal conversion efficiency.

Method used

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  • Method for preparing photo-thermal fibers through microfluid air jet spinning
  • Method for preparing photo-thermal fibers through microfluid air jet spinning
  • Method for preparing photo-thermal fibers through microfluid air jet spinning

Examples

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Effect test

example 1

[0025]Example 1: 10 g of thermoplastic polyurethane is dissolved in 90 g of 99.9% N, N-dimethylformamide forms a mass fraction of 10% spun liquid. The spinning system is loaded into a 20 ml syringe fixed in the microfluid pump. Set the flow rate of the microfluid pump to 1mlh-1The distance from the needle to the receiver is set to 20 cm. The air pump blows air from the pinhole in a pressure of 0.05 MPa, and a thermoplastic polyurethane fiber film is obtained on the receiver. Fiber shapefigure 1 As shown, the fiber diameter is about 200 nm. The ambient temperature is 20 ° C, the humidity is 55%.

[0026]1 g of ferric chloride was dissolved in 150 g of water to form a ferric chloride solution, and then the fiber membrane was placed in a solution. A 1 g pyrrole solution was added dropwise, and the ice bath was 0.5 hours, and the obtained photothermal fiber membrane was washed twice with water, 40 ° C drying, removing unreacted monomers and free particles, such asfigure 2 As shown, for the...

example 2

[0028]Example 2: 13 g of polyamide 66 is dissolved in 87 g 88% formic acid forming mass fraction of 13% spinning liquid. The spinning system is loaded into a 20 ml syringe fixed in the microfluid pump. Set the flow rate of the microfluid pump to 5 ml h-1The distance from the needle to the receiver is set to 35 cm. The air pump blows air from the pinhole in a pressure of 0.1 MPa, obtaining a polyamide 66 fiber film on the receiver. The ambient temperature is 25 ° C, the humidity is 58%.

[0029]2 g of iron sulfate was dissolved in 150 g of water to form a ferrous sulfate solution, and then the fiber membrane was placed in a solution. The 1.5 g of aniline solution was added dropwise, and the ice bath was 0.5 ° C for 1 hour, and the obtained photothermal fiber membrane was washed 5 times, 45 ° C drying, removing the unreacted monomer and free particles to obtain a photothermal conversion fiber membrane.

[0030]Subsequent photothermal water evaporation experiments under xenon lamp, the water...

example 3

[0031]Example 3: 15 g of polyacrylonitrile dissolved in 85 g of 99.9% N, N-dimethylformamide forming mass fraction of 15% spinning liquid. The spinning system is loaded into a 20 ml syringe fixed in the microfluid pump. Set the flow of the microfluid pump to 3mlh-1The distance from the needle to the receiver is set to 25 cm. The air pump blows air from the pinhole in a pressure of 0.1 MPa, and the polyacrylonitrile fiber membrane is obtained on the receiver. The ambient temperature is 27 ° C, and the humidity is 60%.

[0032]3 g of iron nitrate was in 150 g of water to form a nitrate solution, and then the fiber membrane was placed in a solution. A 2 g of a dopamine solution was added dropwise, and the ice bath was 0 ° C for 2 hours, the obtained photothermal fiber membrane was washed 4 times with ethanol, 50 ° C, and the unreacted monomer and free particles were removed to obtain a photothermal conversion fiber membrane.

[0033]Subsequent photothermal water evaporation experiments under...

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Abstract

The invention discloses a method for preparing photo-thermal fibers through microfluid air jet spinning. The method is characterized by comprising the following steps of dissolving a polymer in a solvent, preparing a uniform solution, transferring the uniform solution into a needle tube, performing microfluid air jet spinning to prepare fibers, and performing in-situ polymerization of a photo-thermal material to obtain the photo-thermal fibers, so that the photo-thermal performance of the fibers can be greatly improved, and the water evaporation rate and the photo-thermal conversion efficiency can be increased. In the spinning reaction process, an external heat source is not needed to maintain polymerization of the whole system, controllability is achieved, the spinning reaction time is relatively short, energy is saved, and pollution is avoided; and through in-situ synthesis, a stable and efficient method is provided for rapid preparation of the photo-thermal fibers, and the method has industrialization prospects.

Description

Technical field[0001]The present invention relates to the field of solar thermal conversion, and a method of preparing a functional polymer fiber is designed, and a method of preparing a photothermal fiber is prepared by a microfibody spun wire.Background technique[0002]Solar resources are rich in renewable energy. The energy of solar energy reaching the earth in the year is twice the sum of non-renewable resources such as coal, petroleum, natural gas and uranium such as coal, oil, natural gas and uranium. The development and utilization of solar energy has also become an important part of human use energy, and it is constantly developing. Solar photothermal conversion technology has become one of the research hotspots in the field of solar utilization due to its high transformation speed, high efficiency, low cost, etc., has been widely used in seawater, sewage purification, sterilization, and power generation. The photothermal material as a medium of solar energy and thermal energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00
CPCD01D5/00
Inventor 朱亮亮陈苏刘皓
Owner NANJING UNIV OF TECH
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