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A nanofiber composite tow for reducing phenol content in flue gas and its preparation method and application

A technology of nanofibers and composite tows, applied in the direction of cellulose/protein conjugated artificial filaments, applications, fiber treatment, etc., can solve the problem of inability to reflect the characteristics of fiber materials, nanofiber specific surface area, reduce tar content, low efficiency, etc. problem, to achieve the effect of green and environmental protection of the preparation method, reduction of phenol content, and cheap raw materials

Active Publication Date: 2017-11-17
CHINA TOBACCO ZHEJIANG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention patent document with the publication number CN 103625090A discloses a nanofiber membrane modified tow based on electrospinning, which can effectively reduce the tar content when used in cigarette filters, but has no effect on reducing phenol
At the same time, the electrospinning technology of the traditional spinneret used in this patent document is easy to block holes and has low efficiency, and the maximum amount of nanofibers composited on the tow is only 0.8g / m 2 , unable to reflect the characteristics of fiber materials and the advantages of high specific surface area of ​​nanofibers

Method used

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  • A nanofiber composite tow for reducing phenol content in flue gas and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Dissolve 20g of cellulose diacetate and 5g of diphenylmethane diisocyanate in 200mL of dimethylformamide, and react at 50°C for 2.0h to obtain a reaction liquid; Tin was added to the reaction solution, and the reaction was continued at 90° C. for 1.5 h to obtain cyclodextrin-modified cellulose acetate.

[0042] Cyclodextrin-modified cellulose acetate, cellulose diacetate, glycerol triacetate and N,N-dimethylformamide with a mass ratio of 0.005:0.01:0.001:1 were prepared into a uniform spinning solution, and the spinning The liquid is placed in the liquid-carrying tank of the needleless electrospinning machine, and the electrospinning is carried out at a voltage of 30kV. The winding speed of the base material is 400m / min, and the nanofibers are deposited on the surface of the tobacco tow to obtain a nanofiber composite tow. The diameter of the nanofiber in the nanofiber composite tow is 500nm.

[0043]The obtained nanofiber composite tow was rolled into a filter rod on ...

Embodiment 2

[0045] Dissolve 10g of cellulose acetate and 10g of toluene diisocyanate in 200mL of dimethylformamide, and react at 25°C for 0.5h to obtain a reaction liquid; add 15g of α-cyclodextrin and 0.1g of potassium acetate to the reaction solution, and continue to react at 30°C for 0.5h to obtain cyclodextrin-modified cellulose acetate.

[0046] Cyclodextrin-modified cellulose acetate, cellulose triacetate, ethylene glycol and acetone with a mass ratio of 0.05:0.2:0.01:2 are prepared into a uniform spinning solution, and the spinning solution is placed in a needle-free electrospinning machine In the carrier liquid tank, electrospinning at a voltage of 5kV, the distance between the steel wire and the tobacco tow substrate is adjusted to 5cm, the winding speed of the tobacco tow substrate is 50m / min, and the nanofibers are deposited on the tobacco tow. The surface of the bundle is obtained to obtain a nanofiber composite tow, and the diameter of the nanofiber in the nanofiber composite...

Embodiment 3

[0049] Dissolve 15g of cellulose triacetate and 7.5g of hexamethylene diisocyanate in 200mL of dimethylformamide, and react at 50°C for 2.0h to obtain a reaction liquid; Tin acid was added to the reaction solution, and the reaction was continued at 70° C. for 1.5 h to obtain cyclodextrin-modified cellulose acetate.

[0050] Cyclodextrin-modified cellulose acetate, cellulose diacetate, glycerol triacetate and N,N-dimethylformamide with a mass ratio of 0.01:0.01:0.001:2 were prepared into a uniform spinning solution, and the spinning The liquid is placed in the liquid-carrying tank of the needleless electrospinning machine, and the electrospinning is carried out at a voltage of 30kV. The distance between the steel wire and the tobacco tow substrate is adjusted to 20cm, and the winding speed of the tobacco tow substrate is 150m. / min, the nanofibers are deposited on the surface of the tobacco tow to obtain the nanofiber composite tow, and the diameter of the nanofiber in the nano...

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Abstract

The invention discloses a nanofiber composite tow for reducing phenol content in smoke and its preparation method and application, wherein the nanofiber composite tow includes tobacco tow and nanofibers deposited on the surface of the tobacco tow. The diameter of the nanofiber is 20-500nm, and the nanofiber is formed by electrospinning cellulose acetate modified by cyclodextrin. The preparation method of nanofiber composite tow comprises the following steps: (1) using isocyanate to activate cellulose acetate, and the activated cellulose acetate is graft-copolymerized with cyclodextrin to obtain cyclodextrin-modified cellulose acetate; (2) Electrospinning the spinning solution containing cyclodextrin-modified cellulose acetate with tobacco tow as the base material to obtain the nanofiber composite tow. The raw materials used in the invention are cheap and easy to obtain, the preparation method is green, environmentally friendly, safe and controllable, and the obtained nanofiber composite tow has good adsorption effect on phenol.

Description

technical field [0001] The invention relates to the technical field of cigarettes, in particular to a nanofiber composite tow for reducing the phenol content in smoke, a preparation method and application thereof. Background technique [0002] As people pay more and more attention to the health problems caused by smoking, the research on tar reduction and harm reduction technology of cigarette products has attracted great attention of the tobacco industry. Aiming at various harmful components in cigarette smoke, researchers have developed a variety of harm reduction technologies, such as tipping filters, applying filter ventilation and dilution technology, using cigarette tow with high air permeability and fast static burning rate, blending Methods such as expanded shredded tobacco and expanded cut stems are used. [0003] Among the existing harm reduction technologies, modifying cigarette filters is one of the most commonly used and most effective means of harm reduction. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/02D01F1/10D01D5/00A24D3/10
Inventor 徐志康储国海王辉安全福周国俊汤德芳万灵书杜芳琪李霞智锁红
Owner CHINA TOBACCO ZHEJIANG IND
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