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Preparation method for self-assembly of electrospinning rosary-like fibers

A bead string fiber and self-assembly technology, applied in the fields of materials and chemistry, can solve the problems of neglecting the self-assembly performance of spider silk, limited water collection and directional transmission effects, etc., and achieve obvious water collection performance, stable fiber properties, and operability. strong effect

Active Publication Date: 2013-10-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the focus of the above two methods is to directly form the "bead string structure" after the recombination of spider silk, while ignoring the self-assembly performance of spider silk itself, so the effect of water collection and directional transport is limited.

Method used

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  • Preparation method for self-assembly of electrospinning rosary-like fibers
  • Preparation method for self-assembly of electrospinning rosary-like fibers
  • Preparation method for self-assembly of electrospinning rosary-like fibers

Examples

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Effect test

Embodiment 1

[0024] The invention provides a self-assembly preparation method of electrospun bead string fibers, such as figure 1 and figure 2 As shown, it is prepared by the following method:

[0025] The first step, preparation of electrospinning raw materials:

[0026] Take N,N-dimethylformamide (DMF) with a purity of more than 99% and polyvinylidene fluoride (PVDF) with a purity of more than 99%, and mix the two evenly with a mass fraction of PVDF of 17%. Stirred in a water bath at 35°C for 24h, a colorless and transparent viscous liquid mixture was obtained.

[0027] The second step, the preparation of man-made fibers:

[0028] Place the aluminum receiving bracket in the electrospinning device, draw an appropriate amount of the mixture obtained in the first step with a syringe, place it on the syringe pump, and electrospin at a flow rate of 5mL / h at a DC voltage of 12kV, and the obtained product is made of aluminum Stent reception, during spinning, the needle is above the support...

Embodiment 2

[0036] This example provides the preparation of a bead string fiber with self-assembly ability, and the specific implementation method includes the following steps:

[0037] The first step, the preparation of electrospinning raw materials:

[0038] Take N,N-dimethylformamide (DMF) with a purity of more than 99% and polyvinylidene fluoride (PVDF) with a purity of more than 99%, and mix the two evenly with a mass fraction of PVDF of 5% , and stirred for 24 h under water bath conditions at 35°C to obtain a colorless and transparent viscous liquid mixture.

[0039] The second step, the preparation of man-made fibers:

[0040] Place the aluminum receiving bracket in the electrospinning device, draw the mixture obtained in the first step with a syringe and place it on the syringe pump, and electrospin it at a flow rate of 10mL / h at a DC voltage of 20kV, and the obtained product is made of an aluminum receiving bracket. Support receiving, during spinning, the needle is above the al...

Embodiment 3

[0045] The first step, the preparation of electrospinning raw materials:

[0046] Take N,N-dimethylformamide (DMF) with a purity of more than 99% and polyvinylidene fluoride (PVDF) with a purity of more than 99%, and mix them uniformly with a mass fraction of PVDF of 7% at 35°C After stirring in a water bath for 96 hours, a colorless and transparent viscous liquid mixture was obtained.

[0047] The second step, the preparation of man-made fibers:

[0048] Place the aluminum receiving bracket in the electrospinning device, draw an appropriate amount of the mixture obtained in the first step with a syringe, place it on the syringe pump, and electrospin at a flow rate of 1mL / h at a DC voltage of 18kV, and the obtained product is made of aluminum Stent reception, during spinning, the needle is above the support at 18mm s -1 Move horizontally, after about 10s, take out the bracket.

[0049] The third step, the preparation of self-assembled "bead string" fibers:

[0050] Place t...

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Abstract

The invention discloses a preparation method for the self-assembly of electrospinning rosary-like fibers, and belongs to the technical field of chemistry and material. By inspired by the situation that a cobweb can be assembled to a spindle structure in the wet environment respectively, a static electricity spinning device is utilized to prepare man-made fibers, and an aluminum bracket is used for receiving, so as to form the man-made fibers with the structure that nano-particles are adhered to surfaces; the man-made fibers are allowed to be assembled to the micron-sized ' rosary' structure respectively in the wet environment. According to the preparation method provided by the invention, the manufacturing process is simpler, the cost is lower, the operability is strong, and the method is suitable for mass productions; the respectively assembled fibers have stable quality and long practicability; the method can be used for collecting fresh water, reducing fog, solving the problem of serious water shortage in deserts and wastelands, and dispersing the steam around airports, street lamps, and signal lamps.

Description

technical field [0001] The invention belongs to the technical fields of chemistry and materials, and uses an electrospinning method to prepare a self-assembled bead string fiber with water-collecting properties. Background technique [0002] The current water resource crisis has become one of the obstacles to human development, and all countries are making continuous efforts to collect fresh water. Although the amount of water on the earth is huge, there is very little that can be directly used by people for production and life. First of all, seawater is not drinkable, cannot be used for watering the land, and is difficult to use in industry. Secondly, the earth's fresh water resources only account for 2.5% of its total water, and in this very little fresh water resources, more than 70% are frozen in the ice sheets of the Antarctic and the Arctic. Frozen snow, 87% of fresh water resources are difficult to use. The fresh water resources that humans can really use are part ...

Claims

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Application Information

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IPC IPC(8): D06B1/02D01D5/00D01F6/12D01F6/22D01F6/16D01F6/66
Inventor 赵霖郑咏梅宋诚
Owner BEIHANG UNIV
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