Preparation method for polystyrene-polyvinylidene fluoride coaxial electrospun fiber

A polyvinylidene fluoride spinning, coaxial electrospinning technology, applied in electrospinning, conductive/antistatic filament manufacturing, fiber processing, etc. Effects of improved compressive tensile strength, enhanced electrical conductivity, and improved initial modulus

Active Publication Date: 2016-07-06
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that existing polystyrene fibers have poor mechanical properties and are easily broken during use, the purpose of the present invention is to

Method used

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  • Preparation method for polystyrene-polyvinylidene fluoride coaxial electrospun fiber
  • Preparation method for polystyrene-polyvinylidene fluoride coaxial electrospun fiber
  • Preparation method for polystyrene-polyvinylidene fluoride coaxial electrospun fiber

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preparation example Construction

[0031] The preparation method of described polystyrene-polyurethane coaxial fiber is as follows:

[0032] (1) Using a mixed solution of N,N-dimethylformamide and tetrahydrofuran with a mass ratio of 1:4 as a solvent, dissolving polystyrene in it to prepare a polystyrene spinning solution with a mass concentration of 20%;

[0033] (2) Take the polyurethane resin stock solution as the inner tube spinning solution, take the polystyrene solution as the outer tube spinning solution, and carry out spinning at a temperature of 24 ° C and a humidity of 40%. The spinning speed of the inner and outer tube spinning solution The sum is 4ml / h, the spinning voltage is 25Kv, and the spinning distance is 15cm.

Embodiment 1

[0039] A preparation method of polystyrene-polyvinylidene fluoride coaxial electrospun fiber, the method steps are as follows:

[0040] (1) Add 3g of polyvinylidene fluoride and 17g of N,N-dimethylformamide to a three-necked flask with a stopper, stir magnetically and heat in a water bath to 40°C, continue stirring to completely dissolve polyvinylidene fluoride, and obtain polyvinylidene fluoride spinning silk solution;

[0041] (2) Add 5 g of polystyrene and 15 g of tetrahydrofuran into a three-necked flask with a stopper, stir to fully dissolve the polystyrene to obtain solution a; add 1 g of sodium chloride to solution a, stir to mix evenly, and obtain polystyrene spinning silk solution;

[0042] (3) Use a coaxial spinning needle with an inner diameter of 0.5mm and an outer diameter of 1.3mm, set the spinning voltage to 25Kv, and the receiving distance to be 15cm; use the polyvinylidene fluoride spinning solution as the inner tube spinning solution, and set The flow rate ...

Embodiment 2

[0046] (1) Add 3g of polyvinylidene fluoride and 17g of N,N-dimethylformamide to a three-necked flask with a stopper, stir magnetically and heat in a water bath to 50°C, continue stirring to completely dissolve polyvinylidene fluoride, and obtain polyvinylidene fluoride spinning silk solution;

[0047] (2) Add 5 g of polystyrene and 15 g of tetrahydrofuran into a three-necked flask with a stopper, stir to fully dissolve the polystyrene to obtain solution a; add 1 g of sodium chloride to solution a, stir to mix evenly, and obtain polystyrene spinning silk solution;

[0048](3) Use a coaxial spinning needle with an inner diameter of 0.5mm and an outer diameter of 1.3mm, set the spinning voltage to 20Kv, and the receiving distance to 20cm; use the polyvinylidene fluoride spinning solution as the inner tube spinning solution, and set The flow rate is 0.9ml / h, the polystyrene spinning solution is used as the outer tube spinning solution, and the flow rate is set to 1.8ml / h, and th...

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Abstract

The invention discloses a preparation method for a polystyrene-polyvinylidene fluoride coaxial electrospun fiber, and belongs to the field of electrostatic spinning. The method comprises the steps of dissolving polyvinylidene fluoride in N,N-dimethylformamide to obtain a polyvinylidene fluoride spinning solution; dissolving polystyrene in tetrahydrofuran to obtain a solution a; adding sodium chloride into the solution a and mixing uniformly to obtain a polystyrene spinning solution; and by taking the polyvinylidene fluoride spinning solution as an inner tube spinning solution and taking the polystyrene spinning solution as an outer tube spinning solution, performing coaxial electrospinning in a certain environment, and removing N,N-dimethylformamide and tetrahydrofuran to obtain the polystyrene-polyvinylidene fluoride coaxial electrospun fiber with excellent comprehensive mechanical property.

Description

technical field [0001] The invention relates to a preparation method of polystyrene-polyvinylidene fluoride coaxial electrostatic spinning fiber, belonging to the field of electrostatic spinning. Background technique [0002] In the process of human exploitation, transportation, utilization and storage of petroleum, some oil spill accidents often occur. According to statistics, from 1973 to 2006, there were nearly 3,000 incidents in my country, with an oil spill of about 40,000 tons; after 2007, there were another 6 major oil spills, especially the CNOOC Bohai Bay oil spill in June 2011. The natural environment of our country has caused great harm. [0003] The polystyrene fiber prepared by electrospinning has a large specific surface area in the range of micron, submicron or nanometer materials, so it can efficiently absorb oil on the water surface, avoiding the waste of oil resources and solving oil pollution at the same time harm caused. In the electrospinning process o...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D5/247D01D5/34D01F8/10D01F1/09
CPCD01D5/003D01D5/0092D01D5/247D01D5/34D01F1/09D01F8/10
Inventor 张爱英张帆冯增国
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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