Preparation method of anti-static polyvinylidene fluoride/polylactic acid composite porous fiber membrane

A polyvinylidene fluoride and porous fiber technology, applied in synthetic fibers, fiber processing, electrospinning, etc., can solve the problems of low surface energy and inconvenience, and achieve the effect of good antistatic effect and wide application prospect.

Inactive Publication Date: 2016-09-28
郭舒洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main technical problem to be solved by the present invention is that the surface of polyvinylidene fluoride has strong hydrophobicity and relatively low surface energy, and the film will generate different degrees of static electricity during use, which brings a lot of inconvenience in the process of application. The problem is to provide a preparation method of antistatic polyvinylidene fluoride / polylactic acid composite porous fiber membrane. The present invention dissolves polyvinylidene fluoride and polylactic acid in a solvent respectively, and adds additives to obtain a spinning solution. The spinning liquid is prepared by electrospinning to prepare composite fibers, and the fibers obtained by spinning are immediately added to a solvent for annealing treatment to obtain a composite porous fiber membrane, and the composite porous fiber membrane is loaded with nanometer zinc oxide antistatic particles to obtain Antistatic composite porous fiber membrane, the invention utilizes polylactic acid and polyvinylidene fluoride to carry out composite, utilizes polylactic acid to carry out hydrophilic modification to polyvinylidene fluoride, and utilizes zinc acetate and diethanolamine to prepare nano-zinc oxide conductive particles Among the porous fiber membranes, the obtained membrane not only has excellent mechanical strength, but also has good antistatic effect, which has a wide application prospect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, weigh 20g of polyvinylidene fluoride and 25g of polylactic acid, mix them and add them to 150mL of acetone and dichloromethane in a volume ratio of 3:1, stir mechanically until the solids are completely dissolved, and add 0.1 g sodium lauryl sulfate, 0.1g zeolite and 1g sodium alginate, and moved into a water bath, stirred and reacted at 70°C for 8h, left to stand for defoaming for 3h after the reaction, and the spinning solution could be obtained after defoaming; Fill the spinning solution into a syringe with an inner diameter of 16 mm, a volume of 10 mL, and a needle diameter of 0.9 mm, then install the syringe on a micro-injection pump, clamp the positive electrode of the high-voltage power supply to the metal needle of the syringe, and the needle is at a distance from the negative electrode. The distance is 8cm, the setting voltage is 10kV, and the relative humidity of the air is 40%. The spinning solution is extruded from the needle of the syringe by the thru...

example 2

[0020] First, weigh 25g of polyvinylidene fluoride and 28g of polylactic acid respectively, mix them and add them to 165mL of acetone and dichloromethane at a volume ratio of 3:1, stir mechanically until the solids are completely dissolved, and add 0.2 g sodium lauryl sulfate, 0.15g zeolite and 2g sodium alginate, and moved into a water bath, stirred and reacted at 75°C for 9h, left to stand for defoaming for 4h after the reaction, and the spinning solution could be obtained after defoaming; Fill the spinning solution into a syringe with an inner diameter of 16 mm, a volume of 10 mL, and a needle diameter of 0.9 mm, then install the syringe on a micro-injection pump, clamp the positive electrode of the high-voltage power supply to the metal needle of the syringe, and the needle is at a distance from the negative electrode. The distance is 10cm, the setting voltage is 15kV, and the relative humidity of the air is 50%. The spinning solution is extruded from the needle of the syri...

example 3

[0023] First, weigh 30g of polyvinylidene fluoride and 30g of polylactic acid respectively, mix them and add them to 180mL of acetone and dichloromethane in a volume ratio of 3:1, stir mechanically until the solids are completely dissolved, and add 0.3 g sodium lauryl sulfate, 0.2g zeolite and 3g sodium alginate, and moved into a water bath, stirred and reacted at 80°C for 10h, left to defoam for 5h after the reaction, and the spinning solution could be obtained after defoaming; Fill the spinning solution into a syringe with an inner diameter of 16 mm, a volume of 10 mL, and a needle diameter of 0.9 mm, then install the syringe on a micro-injection pump, clamp the positive electrode of the high-voltage power supply to the metal needle of the syringe, and the needle is at a distance from the negative electrode. The distance is 12cm, the setting voltage is 20kV, and the relative air humidity is 60%. The spinning liquid is extruded from the needle of the syringe by the thrust of t...

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Abstract

The invention discloses a preparation method of an antistatic polyvinylidene fluoride/polylactic acid composite porous fiber membrane, belonging to the field of porous fiber membranes. In the present invention, polyvinylidene fluoride and polylactic acid are respectively dissolved in a solvent, and additives are added to obtain a spinning liquid, and the spinning liquid is prepared by electrospinning to obtain a composite fiber, and the fiber obtained by spinning is immediately added to the solvent Perform annealing treatment to obtain a composite porous fiber membrane, and load nano-zinc oxide antistatic particles in the composite porous fiber membrane to obtain an antistatic composite porous fiber membrane. Hydrophilic modification of polyvinylidene fluoride, and the use of zinc acetate and diethanolamine to prepare a porous fiber membrane loaded with nano-zinc oxide conductive particles, the obtained membrane not only has excellent mechanical strength, but also has good antistatic effect, and has a wide range of applications application prospects.

Description

technical field [0001] The invention discloses a preparation method of an antistatic polyvinylidene fluoride / polylactic acid composite porous fiber membrane, belonging to the field of porous fiber membranes. Background technique [0002] At present, in the process of production, storage and transportation of electronic products, in order to prevent the surface wear and pollution of products, it is indispensable to protect the surface of products or related production and transportation equipment. One of the commonly used methods is to cover the surface of such products with an antistatic protective film. Generally speaking, as a protective film used for electronic products, in addition to requiring it to be easily attached to the surface of the product and taken out after annealing treatment, in order to prevent excessive static electricity that may even endanger the safety of electronic products during the process of tearing off the protective film Voltage also requires th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00D04H1/4382D06M13/188D06M13/368D06M101/16
CPCD04H1/728D01D5/00D01D5/003D04H1/4382D06M13/188D06M13/368D06M2101/16
Inventor 郭舒洋王统军
Owner 郭舒洋
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