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Principle and novel method for preparing orientation-controllable electrostatic spinning nano polymer fibers

An electrospinning and nanofiber technology, applied in fiber processing, conjugated synthetic polymer rayon, single-component synthetic polymer rayon, etc., can solve the weaving method to manufacture various textiles and limit polymer nanofibers Industrial application and other issues, to achieve the effect of easy promotion and application, and simple preparation process

Inactive Publication Date: 2009-09-23
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology uses special materials made up of highly-dielectrified particles called ceramic or plastic microspheres attached by an adhesive layer on top of another substance like silicon dioxide gel. These tiny spherules are then mixed into small droplets during spinning processes, which causes them to form fibers when they hit each other at different angles. By changing their electrical properties through this technique, it becomes possible to create oriented fiber structures such as threads, yarns, wires, cables, foams, tapes, cloths, moldings, filters, membranes, coatings, and more complex shapes.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the orientation of poly(methyl methacrylate) (PMMA)-based materials used for making synthetic fabrics such as knit or weaving yarns without losing their properties due to poor solubility during spinning processes.

Method used

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  • Principle and novel method for preparing orientation-controllable electrostatic spinning nano polymer fibers
  • Principle and novel method for preparing orientation-controllable electrostatic spinning nano polymer fibers
  • Principle and novel method for preparing orientation-controllable electrostatic spinning nano polymer fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A: N,N-dimethylformamide solution prepared as polyacrylocyanide with a concentration of 8% by weight, and magnetically stirred at 50° C. for 2 hours;

[0032] B: Add the above solution into the syringe 2, the inner diameter of the metal nozzle 3 of the syringe 2 is 0.5mm, and the metal nozzle 3 is connected to the positive pole of the DC high-voltage power generator; aluminum foil is used as the metal cathode collecting plate 4, and the distance between the metal cathode collecting plate 4 The distance between the metal nozzles 3 is 10cm; a pair of collector plates 5 arranged in parallel are placed on the metal cathode collector plate 4, and the distance between the two collector plates 5 is 5cm. The material of the collector plates 5 is a glass tank, and the tank is filled with There is a glacial acetic acid solution, and the dielectric constant of the glacial acetic acid solution is 4.1; a voltage of 9kV is applied for electrospinning.

Embodiment 2

[0034] A: N, N-dimethylformamide solution of polymethyl methacrylate with a concentration of 8% by weight was prepared, and magnetically stirred at 50° C. for 2 hours;

[0035] B: Add the above solution into the syringe 2, the inner diameter of the metal nozzle 3 of the syringe 2 is 0.5mm, and the metal nozzle 3 is connected to the positive pole of the DC high-voltage power generator; aluminum foil is used as the metal cathode collecting plate 4, and the distance between the metal cathode collecting plate 4 The distance of the metal sprinkler 3 is 10cm; a pair of collector plates 5 arranged in parallel are placed on the metal cathode collector plate 4, and the distance between the two collector plates 5 is 5cm. The material of the collector plates 5 is iron oxide, and its dielectric The constant is 12;

[0036] Electrospinning was performed by applying a voltage of 6.5 kV.

Embodiment 3

[0038] A: N,N-dimethylformamide solution prepared as polyacrylocyanide with a concentration of 8% by weight, and magnetically stirred at 50° C. for 2 hours;

[0039] B: Add the above solution into the syringe 2, the inner diameter of the metal nozzle 3 of the syringe 2 is 0.5mm, and the metal nozzle 3 is connected to the positive pole of the DC high-voltage power generator; aluminum foil is used as the metal cathode collecting plate 4, and the distance between the metal cathode collecting plate 4 The distance between the metal nozzles 3 is 10cm; a pair of collector plates 5 arranged in parallel are placed on the metal cathode collector plate 4, and the distance between the two collector plates 5 is 5cm. The material of the collector plates 5 is a glass tank, and the tank is filled with There is a methanol solution, and the dielectric constant of the methanol solution is 25; a voltage of 9kV is applied for electrospinning.

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Abstract

The invention relates to a preparation principle and a novel method for preparing polymer nano fibers through orientation-controllable electrostatic spinning. The method comprises the following steps that: a solution of an electrostatic spinning polymer is added in an injector, wherein a metal nozzle of the injector is connected with the positive pole of a direct-current high-voltage power supply, a metal negative collecting plate connected with the negative pole of the direct-current high-voltage power supply is placed under the metal nozzle, and a collecting device which is formed by at least one pair of collecting polar plates and made of a high dielectric constant material is placed on the metal negative collecting plate; and a voltage of 5 to 30 kV is applied to the spinning solution, and the charged spinning liquid flow moves at high speed in an electric field to be drawn and thinned to form electrostatic spinning fibers, and the electrostatic spinning fibers are orientated and aligned between the pair of opposite collecting polar plates when approaching the top parts of the collecting polar plates to form the orientation-controllable electrostatic spinning polymer nano fibers which are aligned to be perpendicular to the direction of the pair of collecting polar plates and connected to the top ends of the pair of collecting polar plates. The method has the advantages of simple process, easy operation, good repeatability, convenient popularization and use and the like.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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