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Antibacterial hollow fiber membrane, preparation method and applications thereof

A fiber membrane and hollow technology, applied in the field of antibacterial hollow fiber membrane and its preparation, can solve the problems of loss of antibacterial substances, decline in antibacterial performance, unstable fixation, etc., and achieve high water flux, high antibacterial performance, and strong binding ability. Effect

Pending Publication Date: 2018-07-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the long-term operation of the film obtained by the above method, the fixation of silver as an antibacterial substance is not stable, so that the antibacterial substance will be continuously lost during the operation, resulting in the decline or even disappearance of the antibacterial performance of the film.

Method used

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  • Antibacterial hollow fiber membrane, preparation method and applications thereof
  • Antibacterial hollow fiber membrane, preparation method and applications thereof
  • Antibacterial hollow fiber membrane, preparation method and applications thereof

Examples

Experimental program
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preparation example Construction

[0053] One aspect of the present invention provides a method for preparing an antibacterial hollow fiber membrane, the method comprising:

[0054] (1) In an alkaline solution, activate the fibers mixed with silver filaments to obtain activated fibers;

[0055] (2) mixing the activated fiber filaments with the membrane-making solution, and braiding the resulting mixture to obtain a hollow fiber braided tube;

[0056] (3) forming the hollow fiber braided tube into an antibacterial hollow fiber membrane;

[0057] Wherein, the film-forming solution contains a film-forming polymer, a porogen and additive A; the additive A is one or more of polyols and polypolyols with a number average molecular weight less than 1,000.

[0058] According to the present invention, the present invention can make the silver thread stably exist in the antibacterial hollow fiber membrane by combining the silver thread with the film-forming fiber thread and adopting the additive A in the film-making solu...

Embodiment approach

[0156] According to a preferred embodiment of the present invention, the weaving is: the silver-containing fiber bundle and the polymer fiber bundle are cross-braided in a "herringbone" shape along the core liquid tube.

[0157] Preferably, the polymer fiber bundle is composed of 100-1000 fiber filaments. Preferably, the silver-containing fiber bundle is composed of 1-10 silver-containing fiber filaments.

[0158] According to the present invention, the silver-containing fiber bundles can be obtained commercially or by self-made.

[0159] According to a preferred embodiment of the present invention, the fiber filaments are selected from at least one of polyester fibers, polyamide fibers, polyolefin fibers, polyamide fibers, polyurethane fibers, polysulfone fibers or glass fibers, preferably polyester fibers and / or or polyamide fibers.

[0160] According to a preferred embodiment of the present invention, the casting solution used in step 2) includes polyvinylidene fluoride, ...

preparation example 1-9

[0185] Under the protection of nitrogen, according to the composition in Table 1 (the type of each compound and the concentration in the membrane-forming solution are as listed, wherein, the concentration refers to the percentage of the net mass of each compound accounting for the total weight of the membrane-forming solution), each group Stir and mix under specified conditions (conditions are shown in Table 1) to dissolve, then vacuum degassing to obtain the corresponding film-making solution; in Table 1:

[0186] PVDF is polyvinylidene fluoride purchased from Arkema MG15 brand, and its number average molecular weight is 210,000;

[0187] PVP is polyvinylpyrrolidone purchased from Sinopharm Reagent Co., Ltd. K30 brand, and its number average molecular weight is 30,000;

[0188] PEG20,000 is polyethylene glycol purchased from Sinopharm Reagent Co., Ltd., and its number average molecular weight is 20,000;

[0189] PEG400 is polyethylene glycol purchased from Sinopharm Reagent ...

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Abstract

The invention relates to the field of preparation of hollow fiber membranes, particularly to an antibacterial hollow fiber membrane, a preparation method and applications thereof. The method comprises: (1) activating fibers mixed with silver fibers in an alkaline solution to obtain activated fibers; (2) mixing the activated fibers and a membrane-forming liquid, and weaving the obtained mixture toobtain a hollow fiber weaving pipe; and (3) molding the hollow fiber weaving pipe to obtain the antibacterial hollow fiber membrane. According to the present invention, the antibacterial hollow fibermembrane produced through the method can maintain the high antibacterial property for a long time, and can have the enhanced backwash membrane breaking pressure so as to provide the strong bonding ability between the support layer and the separation layer.

Description

technical field [0001] The invention relates to the field of preparation of hollow fiber membranes, in particular to an antibacterial hollow fiber membrane and its preparation method and application. Background technique [0002] Membrane separation technology is widely used in the field of water treatment. Among them, polyvinylidene fluoride is a membrane material with excellent comprehensive properties. It has high tensile strength, excellent chemical stability, corrosion resistance and heat resistance, so it is often used in microfiltration, ultrafiltration and Materials for separation membranes such as nanofiltration. With the development of membrane technology, polyvinylidene fluoride has received more and more attention in the fields of wastewater treatment, biomedicine and food manufacturing. [0003] However, due to the hydrophobicity of polyvinylidene fluoride, bacteria and other microorganisms are easy to adsorb and proliferate on the surface of the membrane duri...

Claims

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Application Information

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IPC IPC(8): B01D71/34B01D69/08B01D69/02B01D67/00C02F3/00A61L2/238A61L101/02
CPCB01D67/0093B01D69/08C02F3/1268B01D67/0095B01D2325/24B01D2325/48B01D69/10B01D69/105B01D61/00C02F3/2853B01D2323/12B01D2323/50
Inventor 吴长江奚振宇任鹏飞杨永强
Owner CHINA PETROLEUM & CHEM CORP
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