Device for preparing nano fiber twisted structure

A stranded wire and fiber technology, which is applied in the field of devices for preparing nanofiber stranded wire structures using centrifugal electrospinning technology, can solve the problems of high spinning voltage, poor controllability of the number of stranded wire structure nanofibers, and insufficient bonding of fiber bundles. sequence and other issues, to achieve the effect of accurate and controllable number, good structure and shape of twisted wires, and high degree of connection sequence

Inactive Publication Date: 2011-10-12
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are not many reports in the literature on the preparation of nanofiber strand structures by electrospinning technology. The existing reports are mainly through the improvement of the collection method to obtain the helically wound strand structure of multiple fibers. For example, Paul D.Dalton et al. (Polymer46 (2005) 611-614) obtained the stranded wire structure of nanofibers by using a double-ring collection-rotation me

Method used

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  • Device for preparing nano fiber twisted structure
  • Device for preparing nano fiber twisted structure
  • Device for preparing nano fiber twisted structure

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1: Preparation of orderly overlapping fibers.

[0015] As attached figure 1 As shown, the positive pole of the high-voltage DC power supply 8 is connected to the metal rod 3, the negative pole is connected to the circular aluminum foil collector 5 and grounded, and the position of the spinning solution container or the syringe needle 2 on the insulating rotating disk 4 is adjusted so that the tip of the spinning nozzle 1 is connected to The horizontal distance of the metal rod 3 is 15cm; the vertical distance between the tip of the spinning nozzle 1 and the annular aluminum foil collector 5 is adjusted to 2-3cm, and the spinning solution is injected into the spinning solution container (syringe needle) 2; then the high-voltage DC power supply Plug the 8 plug into the daily 220V power supply, adjust the voltage adjustment knob on the voltage control panel, set the voltage to 2.5-5kV, and press the power switch to make it energized. At this time, the spinning nozzle 1...

Example Embodiment

[0016] Example 2: Preparation of nanofiber stranded wire structure.

[0017] As attached figure 2 As shown, an orderly arrangement of spun fibers 9 are formed on the ring-shaped aluminum foil collector 5 by the centrifugal electrospinning method, and at the same time, there will be formed in the gap of the ring-shaped aluminum foil collector 5 adhered to the T-shaped bracket 10 Orderly arranged overlapping structure. Use a thin rod to remove the fibers that are poor in appearance and that are too close to the two ends of the T-shaped bracket 10, and cut the fibers between the T-shaped bracket 10 and the aluminum foil closer to it, adjust the voltage of the speed regulator to the minimum, and turn it on Motor switch, adjust the speed as much as possible to make the motor's smooth transition from slow to fast, and a stranded wire structure will be formed after 5-60 minutes; as attached image 3 As shown, the portion 11 of the nanofiber stranded wire structure and the portion of th...

Example Embodiment

[0018] Example 3:

[0019] In the device of this embodiment, 1.3 g of polymethylmethacrylate (PMMA) is first dissolved in 8.7 g of N, N-dimethylformamide (DMF) with a mass ratio of 1:1 And tetrahydrofuran (tetrahydrofuran, THF) mixed solution, then add 0.026g of fluorescein, stir with a magnetic stirrer for 2 hours, put it into the spinning solution container 2 after standing for half an hour, and use the centrifugal electrospinning method to obtain order During the implementation process, the overlapped fluorescent fiber is energized to the DC brushless motor 7 to rotate the insulating rotating disk 4 at a speed of 360 rpm. The distance between the spinning nozzle 1 and the annular aluminum foil collector 5 is 3 cm. The voltage is 3.5kV. After 10s, disconnect the power supply 8 of the high-voltage electrostatic generator, turn off the DC brushless motor 7, and use a thin rod to remove the fibers with poor appearance or too close to the ends of the T-shaped bracket 10, and set th...

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Abstract

The invention belongs to the technical field of nano fiber twisted structure or micro-nano rope preparation, and particularly relates to a device for preparing a nano fiber twisted structure by using a centrifugal electrostatic spinning technology. A metal rod is placed in the vertical direction at the central line of an annular aluminum foil collector, a metal rod bracket passes through the center of the annular aluminum foil collector and is used for supporting and stabilizing the metal rod, and the bottom end of the metal rod is butted against and linked with the output shaft of a motor; and the upper part of the metal rod is provided with a circular insulated turntable vertical to the axis of the metal rod, two spinning solution containers are placed on the upper lateral surface of the insulated turntable and symmetrical to the central line of the metal rod, and the spinning solution containers are provided with communicated needle openings aligned with a spinning nozzle of the annular aluminum foil collector. The spun fiber number is accurate and controllable, the twisted structure is good, the lapping sequence is high, the voltage is low, burrs are not caused, and the deviceis convenient for measuring the mechanical property of single fibers.

Description

Technical field: [0001] The invention belongs to the technical field of nanofiber stranded wire structure or micro-nano rope preparation, and in particular relates to a device for preparing a nanofiber stranded wire structure by centrifugal electrostatic spinning technology. Background technique: [0002] Due to their small diameter and large specific surface area, quasi-one-dimensional nanofibers often exhibit physical and chemical properties different from those of bulk and thin film materials, such as light, electricity, magnetism, and force, and have broad application prospects. At present, the preparation methods involving nanofibers mainly include physical / chemical vapor deposition, template method, chemical self-assembly method and electrospinning method, etc. Among them, electrospinning is a simple and easy method that can be directly prepared from polymers and composite materials. The continuous fiber method has the outstanding advantages of low equipment and experi...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D5/18D01D13/00
Inventor 龙云泽尹红星刘术亮赵南赵志立唐成春
Owner QINGDAO UNIV
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