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Reagent and method for enhancing mechanical performance of electrostatic spinning film

An electrospinning and thin film technology, which is applied in the direction of electrospinning, filament/thread forming, textiles and papermaking, etc., can solve the problem of high cost of inorganic nanomaterials such as carbon nanotubes, easy damage to fiber structure, and insignificant reinforcement effect, etc. problem, to achieve the effect of simple equipment and site requirements, simple operation process, and good enhancement effect

Inactive Publication Date: 2017-02-22
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method has limited choice of materials and the reinforcement effect is not obvious. The second method is expensive and cumbersome to implement inorganic nanomaterials such as carbon nanotubes. The third method has obvious reinforcement effect but is extremely easy to damage the fiber structure and affect its application.

Method used

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  • Reagent and method for enhancing mechanical performance of electrostatic spinning film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This example demonstrates the reagent and method for enhancing the mechanical properties of electrospun films provided by the present invention by enhancing the mechanical properties of PLA electrospun films.

[0021] First: prepare polylactic acid (PLA, polylactic acid) electrospun film by electrospinning technology; second: choose chloroform as solvent and water as non-solvent; then determine the mixing ratio of chloroform and water: 1:9 to 5:5 Sprinkle a mixture of chloroform and water on the surface of the film, let it stand for 30 minutes, and wait for it to fully act, then volatilize the chloroform and water, observe the volatilized film with a scanning electron microscope, and discard the proportions that show signs of fiber dissolution , the highest value is selected as the optimal ratio for the ratio that does not dissolve; the ratio of adding chloroform and water is 4:6 in this embodiment; 10ml / cm 2 Sprinkle the reagent on the PLA electrospinning film; then c...

Embodiment 2

[0025] This example demonstrates the reagent and method for enhancing the mechanical properties of electrospun films provided by the present invention by enhancing the mechanical properties of polycarbonate (PC, Polycarbonate) electrospun films.

[0026] First: prepare PC electrospun film by electrospinning technology; secondly: select tetrahydrofuran as solvent and water as non-solvent; then determine the mixing ratio of tetrahydrofuran and water: mix 1:9 to 5:5 ratio of tetrahydrofuran and water Sprinkle the mixture on the surface of the film, let it stand for 30 minutes, and wait for its full effect, then volatilize the tetrahydrofuran and water, observe the volatilized film with a scanning electron microscope, discard the proportion that shows signs of fiber dissolution, and select the proportion that does not occur The highest value is taken as the optimal ratio; in this example, the ratio of adding tetrahydrofuran to water is 3:7; 2 Sprinkle the reagent on the PC electro...

Embodiment 3

[0030] This example demonstrates the reagent and method for enhancing the mechanical properties of electrospun films provided by the present invention by enhancing the mechanical properties of polycarbonate (PC, Polycarbonate) electrospun films. In this embodiment, a mixture of tetrahydrofuran and dimethylformamide is selected as a solvent, and a mixture of water and ethanol is used as a non-solvent; wherein the mixing ratio of tetrahydrofuran and dimethylformamide is any ratio, and the ratio selected in this embodiment is 6:4, , the mixing ratio of water and ethanol is any ratio, and the selection ratio of this embodiment is: 5:5

[0031] Determine the mixing ratio of solvent and non-solvent: pour a mixture of solvent and non-solvent in a ratio of 1:9 to 5:5 on the surface of the film, let it stand for 30 minutes, and wait for it to fully act, then volatilize the solvent and non-solvent, and then The thin film after volatilization is carried out scanning electron microscope o...

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Abstract

The invention provides a reagent for enhancing the mechanical performance of an electrostatic spinning film. The regent is prepared from a solvent and a nonsolvent for a film material in a mixed mode; the solvent is a substance capable of dissolving the electrostatic spinning film or a mixture of two substances capable of dissolving the electrostatic spinning film, and the nonsolvent is a substance incapable of dissolving the electrostatic spinning film or a mixture of two substances incapable of dissolving the electrostatic spinning film; as for the mixed ratio of the solvent to the nonsolvent, the quantity of the solvent can be continuously increased in a certain quantity of the nonsolvent till the material of the electrostatic spinning film is swelled; after contact parts between fibers are swelled, combining is tighter, and after the solvent is volatilized, the mechanical performance of the film can be greatly improved. According to the reagent and method for enhancing the mechanical performance of the electrostatic spinning film, the elasticity modulus, the breaking strength and the toughness of the electrostatic spinning film can be enhanced at the same time.

Description

technical field [0001] The invention relates to the field of polymer processing, in particular to a reagent and a method for enhancing the mechanical properties of an electrostatic spinning film. Background technique [0002] Electrospinning is a common method for producing polymer nanofibers, and the prepared fibers are piled up on a collecting plate to form a microporous fiber membrane. The films produced by this process usually have poor mechanical properties, and their applications are limited. The methods for enhancing the mechanical properties of films prepared by electrospinning mainly include: blending and spinning with other polymer materials, adding inorganic nanomaterials such as carbon nanotubes, and heat treatment. The first method has limited choice of materials and the reinforcement effect is not obvious. The second method is expensive and cumbersome to implement inorganic nanomaterials such as carbon nanotubes. The third method has obvious reinforcement effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/05D06M13/08D06M13/144D06M13/188D06M13/11D06M13/402D01D5/00D06M101/32D06M101/24D06M101/22
CPCD01D5/0007D06M11/05D06M13/08D06M13/11D06M13/144D06M13/188D06M13/402D06M2101/22D06M2101/24D06M2101/32
Inventor 李倩徐轶洋王小峰王市伟高艳红候姣姣李旭燕颜淑洁
Owner ZHENGZHOU UNIV
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