Micro-nano fibre with curled secondary structure, and preparation and use thereof

A technology of curling secondary structure and micro-nano fibers, applied in the field of micro-nano materials, can solve the problems of difficult processing operation, low strength, etc., and achieve the effect of controllable process and simple method

Inactive Publication Date: 2009-05-20
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the electrospinning obtained at present is a non-woven fabric structure in which single fibers are randomly distributed. The diameter of a single fiber is between tens to hundreds of nanometers, and the strength is too low to be processed. Only when the uniaxial nanofiber tow is produced, its application range can be further expanded. For example, in many applications such as nano-reinforced composite materials and sensors, fibers with good orientation are required.
In recent years, people have made some explorations in collecting composite nanofiber bundles. CN200510086985.5 and CN200610117037.8 have proposed a method for collecting composite nano-electrospun fibers. , its controllability needs to be further improved

Method used

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  • Micro-nano fibre with curled secondary structure, and preparation and use thereof
  • Micro-nano fibre with curled secondary structure, and preparation and use thereof
  • Micro-nano fibre with curled secondary structure, and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] See figure 1 Composite electrospinning device. Two or more spinnerets 1 are fixed at the same height; there is a turntable receiver 2 under the spinneret; the spinneret and the turntable receiver are respectively connected to the positive and negative poles of the high voltage power supply.

[0032] The turntable receiver is composed of a turntable with two or more vertical needle electrodes fixed on its edge. The plane of the turntable receiver is perpendicular to the direction of the electric field, the needle electrode is perpendicular to the plane of the turntable and parallel to the electric field, and the turntable receiver is connected with a rotary motor with controllable speed.

[0033] Polymethyl methacrylate (PMMA) was dissolved in dimethylformamide (DMF) to prepare a 15% (mass percent) solution. Each take 1g of this solution and join respectively in the feeding device that is connected with 2 spinneret needles, follow as follows figure 1 The experimental ...

Embodiment 2

[0037] The composite electrospinning device is the same as in Example 1.

[0038] Polymethyl methacrylate (PMMA) was dissolved in dimethylformamide (DMF) to prepare a 15% (mass percent) solution. Each take 1g of this solution and join respectively in the feeding device that is connected with 2 spinneret needles, follow as follows figure 1 The experimental setup for spinning. The external environment temperature is 15°C, the relative humidity is 30%, the high-voltage power supply voltage is 14kV, the vertical distance between the spinning needle and the top of the needle electrode on the turntable receiver is 20cm, and the rotation speed of the turntable receiver is 2000-4000r / min. The spacing d between the needle electrodes on the fixed turntable receiver 2 2cm, adjust the distance d between the spinnerets 1 value. Collect the micro-nanofibers with coiled secondary structures on the needle electrodes on the spinner receiver.

[0039] Such as image 3 as shown, image 3 ...

Embodiment 3

[0042] The composite electrospinning device is the same as in Example 1.

[0043] Polymethyl methacrylate (PMMA) was dissolved in dimethylformamide (DMF) to prepare a 15% (mass percent) solution. Each take 1g of this solution and join respectively in the feeding device that is connected with 2 spinneret needles, follow as follows figure 1 The experimental setup for spinning. The external ambient temperature is 15°C, the relative humidity is 30%, the high-voltage power supply voltage is 14kV, the vertical distance between the spinning needle and the top of the needle electrode on the turntable receiver is 20cm, and the rotation speed of the turntable receiver is 2000-4000r / min. Fixed spacing d between spinnerets 1 5cm, adjust the distance d between the needle electrodes on the turntable receiver 2 value. Collect the micro-nanofibers with coiled secondary structures on the needle electrodes on the spinner receiver.

[0044] Such as image 3 as shown, image 3 b, 3d, 3e ar...

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Abstract

The invention belongs to the micro-nano material field, and relates to a micro-nano fiber with a curling secondary structure and a preparation method and applications thereof. In the invention, the micro-nano fiber with the curling secondary structure prepared by using a high-pressure electrostatic spinning process through transverse shear force produced by a turntable receiver and elasticity of a polymer fiber consists of polymer fiber bundles with the curling micro-nano secondary structure wound by more than one curling polymer fibers of same components or different components and more than one polymer fibers of same components or different components, wherein, the diameter of each polymer fiber in the curling polymer fibers and the polymer fibers is 0.5 to 1 Mu m; and the curling secondary structure curls along the length direction of the polymer fiber bundles and has certain orientation. The invention obtains the micro-nano fiber with the curling secondary structure by a one-step method, and has simple preparation technology and strong operability.

Description

technical field [0001] The invention belongs to the field of micro-nano materials, in particular to a micro-nano fiber with a curled secondary structure, a preparation method thereof, and an application of the micro-nano fiber. Background technique [0002] Electrospinning technology is considered to be an ideal method to prepare continuous micro-nano-scale fibers. Compared with traditional spinning methods, electrospinning has many unique advantages, such as smaller fiber diameter, non-woven fabric structure, and large specific surface area, etc. This technology is attracting more and more attention. , Electrospun fibers have also been widely used in filter materials, wound dressings, and nanocomposites. However, most of the electrospinning obtained at present is a non-woven fabric structure in which single fibers are randomly distributed. The diameter of a single fiber is between tens to hundreds of nanometers, and the strength is too low to be processed. Only when the u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02G1/18D01D5/00
Inventor 杜晨光李风煜赵勇江雷宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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