Functional fiber and the multifunctional fiber thereof

A functional fiber, multi-functional technology, applied in the chemical characteristics of fibers, rayon manufacturing, alkali metal oxides/hydroxides, etc. Easy industrial implementation, good adsorption effect, and easy regeneration

Inactive Publication Date: 2006-08-02
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the surface treatment of activated carbon fibers can improve its adsorption capacity for heavy metals and microorganisms, the cost will also increase accordingly. Similarly, activated carbon fibers also have low strength, easy to cause secondary pollution, complex production processes, and can only adsorb small molecules.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Commercially available granular activated carbon powder (average particle diameter 2.0mm, specific surface area 200m 2 / g) was mixed with dimethylformamide (DMF) in a weight ratio of 1:1, stirred in a ball mill for 2 hours, and obtained an activated carbon filter cake with a solid content of 50wt% after suction filtration. According to scanning electron microscope observation, the particle diameter of the activated carbon is between 0.1 and 4 μm, meeting the requirement of ultrafine adsorbent. The active carbon in the active carbon filter cake and the modified polyacrylonitrile spinning stock solution (the content of acrylonitrile is 90mol%, the content of methyl acrylate is 10mol%, and the solid content in the stock solution is 20wt%) is 4~40:96~by weight. 60 (the specific activated carbon content is 4.4, 9.9, 14.1, 19.5, 25.2, 30.0 and 40.0wt%) in a stirred tank, blending, stirring, defoaming, sprayed from the spinneret by a metering pump, washed, drawn, baked Dry wi...

Embodiment 2

[0035] Commercially available activated carbon fiber powder (length 20mm, diameter 30μm, specific surface area 1000m 2 / g) 100g and 750g concentration of 20wt% polyvinyl alcohol (polymerization degree 1800, hydrolysis degree 88%) aqueous solution are mixed and stirred evenly, after defoaming, metering pump metering, spinneret and coagulation bath and drafting, drying, etc. process, can be made into polyvinyl alcohol absorbent fibers.

[0036]Put 5g of this adsorption fiber into the mixed solution of 200ml benzaldehyde and ethanol (volume ratio is 40:60), then add 40ml of distilled water, 0.5g zinc chloride, 10mL of 98% concentrated sulfuric acid in turn, shake well and load The upper spherical condenser is heated in a constant temperature water bath for a certain period of time; after the reaction is completed, first wash the acetalized fiber with absolute ethanol (bath ratio 1:20), wash it thoroughly with distilled water after washing 5 times, and then dry it at 50°C to cons...

Embodiment 3

[0038] Calcium A type (5A) molecular sieve (average particle diameter 2.8mm) is ground into superfine molecular sieve powder by jet mill, and acrylonitrile-vinylidene chloride copolymer (acrylonitrile content is 80mol%, vinylidene chloride content is 20mol%) , the solid content in the stock solution is 20wt%) DMF stock solution mixed, blended and spun. Acrylonitrile-vinylidene chloride copolymer and ultra-fine molecular sieve powder are uniformly mixed at a weight ratio of 90:10, 75:25 and 60:40. Enter the spinning coagulation bath (50-60wt% DMF aqueous solution), after the fiber is coagulated and formed, it is washed in a preheating bath, drawn, and then drawn in boiling water, oiled, dried, and wound to obtain an ultrafine molecular sieve Acrylic absorbent fibers with powder content of 10, 30 and 40 wt%.

[0039] The obtained ultrafine molecular sieve powder content is respectively 10, 30 and 40wt% of the acrylic chlorine fiber adsorption fiber at 90 ~ 105 ℃, treated with 2...

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Abstract

The present invention relates to one kind of functional fiber and the multifunctional fibers thereof. The functional fiber includes basic fiber polymer and functional additive in the weight ratio of 60-96 to 4-40, the basic fiber polymer may be wet spun and the functional additive is superfine adsorbent of average diameter of 0.01-20 microns. The multifunctional fibers are produced with the functional fiber of the present invention and through further ionizing treatment, and include strong acid ion exchange multifunctional fiber, weak acid cation exchange multifunctional fiber, multiple-functional group ion exchange multifunctional fiber and alkali anion exchange multifunctional fiber. The functional fiber has excellent physical adsorption property; and the multifunctional fibers have both physical adsorption effect and chemical adsorption effect, and may be used in treating electroplating effluent, treating food industry waste water, purifying automatic tail gas, etc.

Description

technical field [0001] The present invention relates to a functional fiber, specifically a functional fiber with physical adsorption, and a multifunctional fiber with both physical adsorption and ion-exchange chemical adsorption properties. The international patent main classification number is proposed to be Int.Cl 7 B01J43 / 00. Background technique [0002] Studies have shown that new functional fibers for adsorption and separation, including activated carbon fibers, ion exchange fibers, chelating fibers, redox fibers and hollow fiber membranes, have many excellent properties, such as large specific surface area, uniform pore structure and rich Ion exchange groups, and its products can appear in various forms such as bundles, paper, cloth, felt, etc. Therefore, as an efficient adsorption material, it has attracted people's attention and has been greatly developed in recent years. [0003] Ion-exchange (chelate) fibers mainly use the ion-exchange groups contained in the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F1/10D01F6/18B01J20/28
Inventor 张华梁晓飞张兴祥王学晨牛建津
Owner TIANJIN POLYTECHNIC UNIV
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