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Water scour-resistant superhydrophobic composite membrane and preparation method and application thereof

A super-hydrophobic and water-scouring technology, applied in textiles and papermaking, complete sets of equipment for the production of artificial threads, filament/thread forming, etc., can solve problems such as loss of application value, loss of superhydrophobic properties of materials, etc., and achieve great potential for economic benefits , Excellent water erosion resistance, simple and feasible process

Inactive Publication Date: 2016-11-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it also has a significant defect, that is, the combination of microspheres and fibers is simply physically adsorbed together. In practical applications, under the action of external force (such as friction) and water washing, the microspheres will fall off from the fiber surface. , resulting in the loss of superhydrophobic properties of the material and the loss of practical application value (see the article for related work: S.T.Yoheg et al., Chemical Communications, 2013, 49(8), 804-806)

Method used

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  • Water scour-resistant superhydrophobic composite membrane and preparation method and application thereof
  • Water scour-resistant superhydrophobic composite membrane and preparation method and application thereof
  • Water scour-resistant superhydrophobic composite membrane and preparation method and application thereof

Examples

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Embodiment 1

[0045] (1) The triblock copolymer polystyrene-poly(ethylene-butylene)-polystyrene (SEBS, M w =8.45×10 4 g / mol, the block volume ratio of PS is 30%) dissolved in tetrahydrofuran (THF), the concentration of SEBS is controlled to be 14wt%, after the solution is prepared, it is stirred at 25°C for 6-8 hours to a uniform spinning solution; Spin this solution to prepare SEBS fibers, control the feed rate of the solution to be 2mL / h, the spinning voltage to be 10kV, the collection distance to be 15cm, the ambient temperature to be 25°C, and the ambient humidity to be 50%. 20 cm, drum rotation speed 50r / min, the solution was electrospun for 20 min to prepare SEBS fiber membrane. The average fiber diameter is 8 μm.

[0046] (2) The same SEBS is dissolved in tetrahydrofuran (THF) and N,N-dimethylformamide (DMF), the mass concentration of SEBS is controlled to be 14wt%, the mass ratio of THF and DMF is 80:20, and the solution is prepared Stir at 25 DEG C for 6 to 8 hours to a homogene...

Embodiment 2

[0049] (1) The triblock copolymer polystyrene-poly(ethylene-butylene)-polystyrene (SEBS, M w =8.45×10 4 g / mol, the block volume ratio of PS is 30%) dissolved in tetrahydrofuran (THF), the concentration of SEBS is controlled to be 14wt%, after the solution is prepared, it is stirred at 25°C for 6-8 hours to a uniform spinning solution; This solution is spun to prepare SEBS fiber, and the feeding rate of control solution is 2mL / h, and spinning voltage is 20kV, and collection distance is 20cm, and ambient temperature is 25 ℃, and ambient humidity is 50%, adopts flat-plate yarn take-up device to collect, the The SEBS fiber membrane was prepared by solution electrospinning for 20min. The average fiber diameter is 8 μm.

[0050] (2) The same SEBS is dissolved in tetrahydrofuran (THF) and N,N-dimethylformamide (DMF), the mass concentration of SEBS is controlled to be 14wt%, the mass ratio of THF and DMF is 80:20, and the solution is prepared Stir at 25 DEG C for 6 to 8 hours to a ...

Embodiment 3

[0053] (1) The triblock copolymer, polystyrene-ethylene-butylene-styrene (SEBS, M w =8.45×10 4 g / mol, the block volume ratio of PS is 30%) dissolved in tetrahydrofuran (THF), the concentration of SEBS is controlled to be 14wt%, after the solution is prepared, it is stirred at 25°C for 6-8 hours to a uniform spinning solution; Spin this solution to prepare SEBS fibers, control the feed rate of the solution to be 2mL / h, the spinning voltage to be 20kV, the collection distance to be 20cm, the ambient temperature to be 25°C, and the ambient humidity to be 70%. 5cm, the rotating speed of the drum is 500r / min, and the drum is connected to negative high voltage -30kV, and the solution is electrospun for 20min to prepare the SEBS fiber membrane. The average fiber diameter is 8 μm.

[0054] (2) the same SEBS is dissolved in tetrahydrofuran (THF), and the mass concentration of SEBS is controlled to be 8wt%. After the solution is prepared, it is stirred at 25°C for 4 hours to a homogen...

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Abstract

The invention belongs to the field of high polymer materials and discloses a water scour-resistant superhydrophobic composite fiber membrane and a preparation method and application thereof. A composite fiber membrane is prepared into high polymer fibers by adopting a hydrophobic high polymer material through an electrospinning technology; homogeneous or heterogenic hydrophobic high polymer material solution coats the fiber membrane through an electrospinning technology; the composite fiber membrane is subjected to physical or chemical crosslinking treatment, and finally the superhydrophobic composite fiber membrane which is composed of the fibers and microspheres and has the surface provided with a micro-nano structure is obtained. The diameters of the fibers in the water scour-resistant superhydrophobic composite fiber membrane are 100 nm to 20 [mu]m, and the microsphere dimension is 1-30 [mu]m. The micro-nano structure formed by the fibers and the microspheres in the composite fiber membrane is fixed, so that the water scour-resistant superhydrophobic composite fiber membrane has excellent superhydrophobic and scour-resistant performances, can be applied to the fields such as oil-water separation, self-cleaning, antifreezing and antibiosis and have a huge economic benefit potential.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a superhydrophobic composite membrane resistant to water erosion and its preparation method and application. Background technique [0002] Superhydrophobic materials refer to materials with a static contact angle between water droplets and the surface of the material greater than 150° and a rolling angle less than 10°. Applications include self-cleaning, oil-water separation, antifreeze, and fluid resistance reduction. Two key factors for superhydrophobic materials to have such superhydrophobic properties are: first, low surface free energy; second, high surface roughness. Therefore, materials with special hierarchical structure surfaces are prepared, such as natural lotus leaf surfaces, insect wings, bird feathers, etc., and materials with composite structures (micro-nano structures) on different nanometer and micrometer scales, to obtain such superstructures. Hydro...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J3/24C08L53/02C08L25/06C08L27/16C08L33/12C08L81/06D01F6/30D01F6/42D01F6/12D01F6/16D01F6/76D01D13/00D01D5/00
CPCD01D5/003D01D5/0076D01D13/00D01F6/12D01F6/16D01F6/30D01F6/42D01F6/76C08J3/24C08J5/18C08L25/06C08L27/16C08L33/12C08L53/025C08L81/06C08L2205/16C08L2205/025C08J2353/02C08J2381/06C08J2325/06C08J2327/16C08J2333/12C08J2481/06C08J2427/16C08J2425/06C08J2433/12C08J2453/02
Inventor 王林格吴杰
Owner SOUTH CHINA UNIV OF TECH
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