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Electric device and method for spinning generation and collection

A collection device and electrospinning technology, applied in textiles and papermaking, filament/thread forming, fiber processing, etc., can solve the problems of small collection range and poor fiber orientation, achieve broad application prospects and expand the flexibility of use Effect

Inactive Publication Date: 2008-05-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the collection area is very small, and when the width of the insulating area is greater than 1cm, the fiber orientation gradually becomes poor

Method used

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  • Electric device and method for spinning generation and collection
  • Electric device and method for spinning generation and collection
  • Electric device and method for spinning generation and collection

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0049] 1. Use the PVA aqueous solution with a mass percentage of 7% as the working liquid, put it into the air pressure liquid supply device and connect it with two nozzles;

[0050] 2. Adjust the supply flow rate of the two nozzles to 0.1μl / min;

[0051] 3. Make the two nozzles face each other, and adjust the distance between them to 30cm;

[0052] 4. Use a polytetrafluoroethylene tube with a diameter of 6mm as the collection device, and adjust the vertical distance between it and the two nozzles to be 5cm.

[0053] 5. Adjust the rotating speed of the cylinder to 3000rpm;

[0054] 6. Turn on the positive and negative high-voltage power supplies, and adjust the voltages to 7kV and -7kV respectively. Use an insulating rod to draw the ejected fiber bundle to the surface of the Teflon tube and start collecting and spinning.

example 2

[0056] 1. Take 10% PVA aqueous solution as the working liquid, put it into a dual-channel syringe pump and connect it with two nozzles;

[0057] 2. Adjust the supply flow rate of the two nozzles to be 3μl / min;

[0058] 3. Make the two nozzles face each other, and adjust the distance between them to 2cm;

[0059] 4. Use a metal cylinder with a diameter of 40mm as the collection device, and adjust the vertical distance between it and the two nozzles to be 15cm.

[0060] 5. Adjust the rotation speed of the cylinder to 1000rpm;

[0061] 6. Turn on the positive and negative high-voltage power supplies, and adjust the voltages to 2kV and -2kV respectively. The ejected fiber bundles are drawn to the surface of the metal cylinder using insulating rods to start collecting and spinning.

example 3

[0063] 1. Use 10% PVA aqueous solution as the working liquid, put it into a dual-channel syringe pump and communicate with two nozzles;

[0064] 2. Adjust the flow rates of the positive and negative nozzles to 2μl / min and 7μl / min respectively;

[0065] 3. Make the two nozzles face each other, and adjust the distance between them to 20cm;

[0066] 4. Use a metal cylinder with a diameter of 40mm as the collection device, and adjust the vertical distance between it and the two nozzles to be 20cm.

[0067] 5. Adjust the rotation speed of the cylinder to 1000rpm;

[0068] 6. Turn on the positive and negative high-voltage power supplies, and adjust the voltages to 7kV and -7kV respectively. The ejected fiber bundle is drawn to the surface of the metal cylinder by means of airflow control, and the collection and spinning are started.

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Abstract

The device to generate and collect orientation arrangement belongs to one-dimension nano material preparation field and comprises: a spraying device, a liquid supply device, a high-voltage power, and a collection device; wherein, using two pieces or two groups head-on nozzles connected to positive and negative high voltage as spraying system to spray fibers with opposite discharges to attract, impact and neutralize in air, forming spinning cluster with flying speed rapid reducing, and collecting fiber of high orientation arrangement. This invention can collect fiber in large area, prepares dual-constituent or multi-constituent fiber structure, and endows orientation arrangement more wide application future.

Description

technical field [0001] The invention relates to a device and method for generating and collecting electrospinning, in particular to an electrospinning method and device for preparing and arranging continuous micro / nano-scale fibers, belonging to the field of one-dimensional nanomaterial preparation. Background technique [0002] Electrospinning technology has attracted more and more attention, and has been widely used in filter materials, wound dressings, biological tissue engineering materials, nanocomposites and sensors. It is considered to be a method for preparing continuous micro / nano Ideal way to scale fibers. The electrospinning device generally includes four parts: a high-voltage power supply, a liquid supply device, a spray device and a collection device. The liquid supply device supplies the solution or molten liquid of polymer or other materials to the injection device, and the high-voltage power supply provides a DC voltage of hundreds to tens of thousands of vo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/00
CPCD01D5/0069
Inventor 李路明潘焕胡龙
Owner TSINGHUA UNIV
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