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Preparation method of fibrous membrane with super hydrophobic multi-stage nanometer structure

A nanostructure and fiber membrane technology, applied in fiber treatment, spinning solution preparation, fiber chemical characteristics, etc., can solve the problems of poor mechanical strength, cumbersome preparation of superhydrophobic fibers, etc., and achieve improved hydrophobic performance, low price, and simple process Effect

Inactive Publication Date: 2010-12-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a fiber membrane with a superhydrophobic multi-level nanostructure, which overcomes the disadvantages of cumbersome preparation of superhydrophobic fibers and poor mechanical strength under existing conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] At room temperature of 25°C, 3 g of polystyrene (molecular weight 208 kg / mol), 0.5 g of hydrophobic silica nanoparticles with a diameter of 2-40 nm were dissolved in 7 g of N, N-dimethylformamide solution with stirring at a speed of 10 rpm , stirred until all the solids were dissolved, and the solution was a colorless transparent liquid to obtain a polystyrene solution with a mass fraction of 30wt% (14.3wt% relative to the content of polystyrene silica nanoparticles).

[0020] At a room temperature of 25°C, the prepared polystyrene / silica solution was input to the spinneret at a flow rate of 6 mL / h, and at the same time, the spinneret was connected to a 15 kV high-voltage electrostatic generator, and aluminum foil was used to To receive the fiber, the fiber receiving distance is 10cm, and a novel superhydrophobic multi-level nanostructure fiber is obtained, and its hydrophobic angle is 157.2°. Under the same conditions, fibers were obtained without adding silica nanopar...

Embodiment 2

[0022] At room temperature 25°C, 2g of polymethyl methacrylate (molecular weight 110kg / mol), 0.5g of hydrophobic silica nanoparticles with a diameter of 2-40nm were dissolved in 8g of N,N-dimethylformaldehyde with stirring at a speed of 100rpm. In the amide solution, stir until all the solids are dissolved, the solution is a colorless transparent liquid, and a polymethyl methacrylate solution with a mass fraction of 20% (relative to the content of polymethyl methacrylate silicon dioxide nanoparticles is 20wt%) is obtained.

[0023] At a room temperature of 25°C, the prepared polymethyl methacrylate / silica solution was fed to the spinneret at a flow rate of 3 mL / h, and the spinneret was connected to a 30 kV high-voltage electrostatic generator , the copper mesh was used to receive the fiber, and the fiber receiving distance was 20cm, and a new type of superhydrophobic multi-level nanostructure fiber was obtained, and its hydrophobic angle was 153.2°. Under the same conditions, ...

Embodiment 3

[0025] At room temperature at 25°C, 1 g of cellulose acetate (molecular weight 40 kg / mol), 0.05 g of hydrophobic silica nanoparticles with a diameter of 2-40 nm were dissolved in 9 g of N,N-dimethylacetamide / In the acetone (weight ratio 2 / 1) solution, stir until solid all dissolves, and solution is colorless transparent liquid, obtains the cellulose acetate solution of mass fraction 10% (with respect to cellulose acetate silica nano particle content of about 5wt%).

[0026] Under the condition of room temperature 25°C, the prepared cellulose acetate / silica solution was input to the spinneret at a flow rate of 2mL / h, and at the same time, the spinneret was connected to a 20 kV high-voltage electrostatic generator. The non-woven fabric receives the fibers (on the top of the winding drum), and the fiber receiving distance is 15 cm to obtain a novel hydrophobic multi-level nanostructured fiber membrane with a hydrophobic angle of 140.2°. Under the same conditions, fibers were ob...

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PUM

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Abstract

The invention provides a preparation method of fibrous membrane with a super hydrophobic multi-stage nanometer structure, which is characterized by comprising the following specific steps: 1, at room temperature, adding hydrophobic polymer and hydrophobic inorganic nanoparticles into a sealed container filled with solvent, putting the sealed container on a magnetic stirrer to stir at the revolving speed of 10-200 rpm, and obtaining solution with even property; 2, at room temperature, inputting solution obtained in step 1 onto a spinning nozzle at constant flow velocity; connecting the spinning nozzle to a high voltage static generator to carry out electrostatic spinning; and receiving spun fiber by a receiver to obtain the fibrous membrane with super hydrophobic multi-stage nanometer structure. The invention can drastically improve the hydrophobic performance of the fibrous membrane.

Description

technical field [0001] The invention relates to a method for preparing a fiber membrane with a superhydrophobic multilevel nanostructure, and belongs to the technical field of nanomaterials. Background technique [0002] In recent years, electrospinning technology, as a simple and effective method for preparing fibers with diameters ranging from hundreds of nanometers to several microns, has attracted more and more attention, and has attracted extensive attention from researchers from all over the world. So far, nearly a hundred kinds of polymers have been used to prepare electrospun nanofibrous membranes by solution or melt spinning. In the past 10 years, electrospun nanofibrous membranes have been applied in filtration, superhydrophobic materials, reaction catalyst supports, ultra-high sensitivity biosensors, biological tissue engineering, dye-sensitized solar cells and other fields. [0003] Researchers at home and abroad have reported the research on the preparation of ...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D1/02D01F1/10
Inventor 丁彬林金友蔡宇俞建勇杨建茂孙刚
Owner DONGHUA UNIV
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