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High polymer material, super-hydrophobic porous membrane, coating, preparation method and applications

A polymer material and super-hydrophobic technology, which is applied in the fields of polymer materials and their preparation, coating, and super-hydrophobic porous membrane, can solve the complicated process, the surface does not have a micro-nano rough structure, and the process of increasing the super-hydrophobic fiber membrane is complicated. degree and other issues, to achieve the effect of avoiding secondary pollution and simple process

Active Publication Date: 2019-12-10
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Commonly used low surface energy spinning materials include polyethylene, polyethylene, polyvinylidene fluoride, polypropylene, polyacrylonitrile, polyurethane, etc. It has the problem of micro-nano rough structure, so it only has hydrophobicity, not superhydrophobicity, which greatly limits its separation performance and anti-pollution performance in practical applications
In order to achieve the superhydrophobicity of the above-mentioned fiber membrane, it is necessary to blend nanoparticles in the spinning material, or to process the fiber membrane through surface grafting and surface coating after the fiber membrane is prepared by electrospinning. The process is cumbersome and greatly Increased the complexity of the process for preparing superhydrophobic fiber membranes
At the same time, the material coated on the surface of the fiber is easy to fall off, resulting in poor stability and secondary pollution

Method used

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  • High polymer material, super-hydrophobic porous membrane, coating, preparation method and applications
  • High polymer material, super-hydrophobic porous membrane, coating, preparation method and applications
  • High polymer material, super-hydrophobic porous membrane, coating, preparation method and applications

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preparation example Construction

[0051] The embodiment of the present invention also provides a kind of polymer material, and its preparation method comprises:

[0052] Dissolving the hydrophobic polymer in a high surface tension solvent to form a polymer solution with a concentration of 0.05-1.0 g / mL;

[0053] Electrospinning is performed on the polymer solution to obtain the polymer material, wherein the electrospinning temperature is 5-80° C., the time is 2-48 hours, and the relative humidity is 40-100%. The wire voltage difference is 8-40kV, the rotational speed of the receiving end is 5-100r / min, the injection speed of the polymer solution is 0.01-5mL / h, and the distance between the needle and the receiver is 5-40cm.

[0054] Further, the polymer material is prepared by high-humidity-induced electrospinning technology, without any pre-treatment or post-treatment process, the prepared polymer material has super-hydrophobic properties, and its water contact angle can reach 150 °~170°.

[0055] In some em...

Embodiment 1

[0093] Weigh powdered polyvinylidene fluoride, dissolve it in N-methylpyrrolidone at a concentration of 0.18 g / mL, stir at 80°C for 15 hours, and let stand for defoaming for 6 hours to prepare a polymer membrane solution. The above solution was spun onto an aluminum foil substrate by electrospinning, the temperature during spinning was 25°C, the relative humidity of water vapor was 75%, the pushing speed was 1.3mL / h, the receiving speed was 20r / min, and the voltage difference was 12kV , the distance between the needle and the receiver was 11cm, and the electrospinning treatment time was 12h. After spinning, the membrane was dried at 25° C. for 24 hours to obtain an electrospun superhydrophobic porous membrane. The optical picture and hydrophobicity of the superhydrophobic porous membrane refer to Figure 2a as well as Figure 2b . It can be seen from the optical pictures that the size of the two films is 15×15cm 2 Above, the water drop on it is a ball, and can roll freely....

Embodiment 2

[0095] Weigh powdered polyvinylidene fluoride, dissolve them in N-methylpyrrolidone with solutions of 0.15, 0.175, 0.20, 0.225, and 0.25 g / mL respectively, stir at 60°C for 12 hours, let stand for 8 hours to defoam, and prepare polymer membrane solution. The above solution was spun onto an aluminum foil substrate by electrospinning, the temperature during spinning was 25°C, the relative humidity of water vapor was 75%, the pushing speed was 1.5mL / h, the rotational speed of the receiving end was 25r / min, and the voltage difference was 15kV, the distance between the needle and the receiver is 14cm, and the electrospinning time is 8h. After spinning, the membrane was dried at 25° C. for 24 hours to obtain an electrospun superhydrophobic porous membrane. Carry out pore size analysis to the membrane obtained, its test result can refer to Figure 4 . Curves 1, 2, 3, 4, and 5 are the pore size distribution curves obtained from membrane tests obtained from solutions with concentrat...

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Abstract

The invention discloses a high polymer material, a super-hydrophobic porous membrane, a coating, a preparation method and applications. The high polymer material comprises a porous structure formed bya hydrophobic polymer, and the surface of the high polymer material is provided with a micro-nano coarse structure penetrated by ball wires. The preparation method comprises the following steps: dissolving the hydrophobic polymer in a high-surface-tension solvent to form a polymer solution with the concentration of 0.05-1.0 g / mL; and carrying out electrostatic spinning treatment on the polymer solution in an environment with the temperature of 5-80 DEG C the relative humidity of 40-100% for 2-48 hours to obtain a polymer material, wherein the super-hydrophobic porous membrane or the porous coating is formed by the high polymer material. The polymer material, the super-hydrophobic porous membrane and the coating have super-hydrophobic properties and extremely high porosity, the preparationprocess is simple, pretreatment and post-treatment processes are not needed, and the application prospect is wide.

Description

technical field [0001] The invention relates to a polymer material with superhydrophobic properties and high porosity and a preparation method thereof, in particular to a superhydrophobic porous film and coating based on the polymer material, and a preparation method and application thereof, belonging to high Molecular materials technology field. Background technique [0002] Hydrophobic porous membranes and coatings are water-repellent, resistant to water penetration, and have good air permeability. They have many applications in daily life and industrial production, such as seawater desalination, oil purification, drug purification, air purification, and building protective coatings. layer and clothing protection layer, etc. The stronger the hydrophobicity of porous membranes and coatings, the stronger their water penetration resistance, and the better their performance in applications such as separation and protective coatings. Therefore, porous membranes and coatings w...

Claims

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Application Information

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IPC IPC(8): B01D71/58B01D71/42B01D71/34B01D71/28B01D71/26B01D67/00
CPCB01D71/26B01D71/28B01D71/34B01D71/42B01D71/58B01D67/0006B01D2325/38B01D2323/39
Inventor 靳健张丰姜高烁
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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