Strengthened polysulfone nano-fiber air filter membrane and electrostatic spinning preparation method thereof

A nanofiber and air filtration technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve the problem of difficult to achieve controllable preparation of reinforced polysulfone nanofiber air filtration membranes, poor adhesion of substrates, and fiber structure. Changes and other problems, to achieve the effect of enhancing automatic cleaning performance, prolonging service life, and improving structural stability

Inactive Publication Date: 2014-01-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cross-linking agent used here is methanol, ethanol, glutaraldehyde or formaldehyde. In addition to problems such as fiber structure changes and poor bonding with the substrate, this method also has certain safety hazards. The cross-linking agent used is such as Both methanol and formaldehyde can cause great harm to the human body
Therefore, the methods disclosed in the above patents are difficult to realize the controllable preparation of reinforced polysulfone nanofiber air filtration membranes.

Method used

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  • Strengthened polysulfone nano-fiber air filter membrane and electrostatic spinning preparation method thereof
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  • Strengthened polysulfone nano-fiber air filter membrane and electrostatic spinning preparation method thereof

Examples

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Embodiment 1

[0026] A reinforced polysulfone nanofiber air filter membrane and its electrospinning preparation method, the specific steps are:

[0027] Step 1: Place the polysulfone resin particles in a vacuum oven and dry them under vacuum at 100°C for 3 hours;

[0028] The second step: dissolve the dried polysulfone resin particles in a 1:1:1 mixed solvent of N-methylpyrrolidone, dimethyl sulfoxide and formamide, and place on a magnetic stirrer to stir for 8 hours to form Homogeneous solution; In the homogeneous solution, the massfraction of polysulfone resin is 5%;

[0029] Step 3: Dissolve the dried polysulfone resin particles in a 1:1 mixed solvent of N,N-dimethylacetamide and N,N-dimethylformamide, and stir on a magnetic stirrer 12 hours, form homogeneous solution; In described homogeneous solution, the massfraction of polysulfone resin is 20%;

[0030] The fourth step: under the conditions of temperature 35°C and humidity 50%, the polysulfone electrospinning solution with a mass f...

Embodiment 2

[0032] A reinforced polysulfone nanofiber air filter membrane and its electrospinning preparation method, the specific steps are:

[0033] Step 1: Place the polysulfone resin particles in a vacuum oven and dry them under vacuum at 120°C for 1.5 hours;

[0034] The second step: dissolve the dried polysulfone resin particles in a 1:1 mixed solvent of nitrobenzene and N-methylpyrrolidone, and then add 1 dropwise of methanol, ethanol and isobutanol to the solution : 1:1 mixed solution, the solution was placed on a magnetic stirrer and stirred for 24 hours to form a homogeneous solution; in the homogeneous solution, the total mass of methanol, ethanol and isobutanol was nitrobenzene and N-formazol 0.1% of the total mass of pyrrolidone, and the mass fraction of polysulfone resin is 25%;

[0035] The third step: dissolve the dried polysulfone resin particles in a 2:1:1 mixed solvent of dichloroethane, chloroform and tetrahydrofuran, and place on a magnetic stirrer to stir for 16 hou...

Embodiment 3

[0038] A reinforced polysulfone nanofiber air filter membrane and its electrospinning preparation method, the specific steps are:

[0039] Step 1: Place the polysulfone resin particles in a vacuum oven and dry them under vacuum at 110°C for 2.5 hours;

[0040] Second step: dissolve the dried polysulfone resin particles in a 1:1 mixed solvent of 2-phenoxyethanol and ethyl benzoate, place the solution on a magnetic stirrer and stir for 20 hours to form a uniform phase solution; in the homogeneous solution, the massfraction of polysulfone resin is 35%;

[0041] The third step: dissolve the dried polysulfone resin particles in a 1:1 mixed solvent of trifluoroacetic acid and hexafluoroisopropanol, and then add toluene, xylene, phenol, chlorinated 1:1:1:1:1 mixed solvent of benzene and water, and described solution is placed on magnetic stirrer and stirred for 24 hours, forms homogeneous solution; In described homogeneous solution, toluene, xylene, phenol, The total mass of chloro...

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Abstract

The invention relates to a strengthened polysulfone nano-fiber air filter membrane and an electrostatic spinning preparation method thereof. The preparation method comprises the following steps of firstly, dissolving polysulfone in solvents with different melting points and different solubility parameters to form uniform liquor; and then, carrying out electrostatic spinning on the liquor by a plurality of spray heads to obtain a crossing-point adherent-nonadherent three-dimensional interpenetrating network structure polysulfone membrane. The product is a three-dimensional network shaped material which is formed by interpenetrating and alternating adherent-nonadherent fibers, wherein crossing points in the fibers are interconnected in an adherent manner by virtue of effective non-hydrogen bond bonding effects, wherein gram weight is 0.01g / m<2>-25.5g / m<2>, breaking strength is 16.1 MPa-48.6 MPa, abrasive resistance is 500 rings-2100 rings, filter efficiency for particles of 0.01 micron-5 microns reaches over 99.99%, and resistance drop is below 30Pa. According to the invention, the preparation process is simple, the cost is low, and a fiber membrane product has wide application prospect in the hyperfine filter filed.

Description

technical field [0001] The invention relates to a reinforced polysulfone nanofiber air filter membrane and its electrospinning preparation method, in particular to a reinforced polysulfone nanofiber air filter membrane and its electrospinning method through composite spinning of two solvent systems with different boiling points. silk preparation method. Background technique [0002] Polysulfone is a special engineering plastic with good temperature resistance, acid and alkali resistance, corrosion resistance, good dimensional stability and good electrical insulation. Electrospun polysulfone fibers have broad application prospects in the fields of energy, information, medicine, metallurgy, catalysis, and basic scientific research due to their small fiber diameter, high porosity, large specific surface area, and small mass per unit area. The study of electrospun polysulfone fiber membrane has become a hotspot in the research of new materials. Electrospun polysulfone nanofibe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00B01D53/22D04H1/4326D04H1/728
Inventor 丁彬王娜万会高俞建勇
Owner DONGHUA UNIV
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