Micro-mesoporous carbon-carbon composite material and preparation method thereof

A carbon composite material and mesoporous carbon technology, applied in the direction of carbon preparation/purification, carbon compounds, chemical instruments and methods, etc., can solve the problem of reducing the hazards of cigarettes, easy to block micropore channels, and difficult to achieve comprehensive reduction of harmful components, etc. problem, achieve the effect that the reaction conditions are easy to control, the effect is reduced, and the cost is low

Inactive Publication Date: 2015-07-29
CHONGQING CHINA TOBACCO IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned seven kinds of harmful components have different molecular sizes and viscous macromolecules such as tar are easy to block the micropore channels, which makes it difficult to achieve comprehensive reduction of harmful components with a relatively single pore size of activated carbon, and porous materials such as micropore-mesoporous composite material, which can take advantage of the structural advantages of several channels at the same time, thereby effectively reducing the hazards of cigarettes

Method used

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  • Micro-mesoporous carbon-carbon composite material and preparation method thereof
  • Micro-mesoporous carbon-carbon composite material and preparation method thereof
  • Micro-mesoporous carbon-carbon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 61.1g of phenol into a four-neck flask, dissolve it at 43°C, add 13.0g of NaOH, stir for 10 minutes, add 105.4g of formaldehyde solution (mass fraction 37%) dropwise with a constant pressure funnel, continue to heat up, when After the temperature reaches 70-75°C, react for 1 hour. After the reaction, adjust the pH value to 7.0 with HCl, vacuum dehydrate at 50°C, and finally dissolve the product in ethanol (20wt% ethanol solution) to prepare the methyl phenolic resin precursor body.

[0026] After crushing the tobacco stems, take 40-100 mesh particles, mix them with KOH at a weight ratio of 1:1, add deionized water and fully impregnate them for 16 hours, then vacuum dry them at 100°C for 2 hours, and then calcinate them at 800°C in a nitrogen atmosphere. Get activated carbon.

[0027] Weigh 10g of F127 and dissolve it in 100g of ethanol to form a clear solution at 40°C, add 50g of resole phenolic resin precursor (20wt% ethanol solution), and continue stirring for ...

Embodiment 2

[0032] After weighing 10g of F127 and dissolving it in 100g of ethanol to form a clear solution at 40°C, add 50g of the resole phenolic resin (20wt% ethanol solution) prepared in Example 1 and continue stirring for 2h. Add 28g of activated carbon (same as Example 1) and continue to stir until the ethanol volatilizes, and then further thermally agglomerate in a 100 degree oven for 24h. Then, it was calcined at 350°C for 3h and 900°C for 2h under the protection of nitrogen to obtain a micro-meso composite carbon material 2 with a specific surface area of ​​1076m2 / g, in which the mesoporous carbon content was 20wt%.

[0033] The micro-media composite carbon material 2 is added to the cigarette holder rod, specifically, the binary composite filter rod is composed of acetate fiber segments and acetate fiber segments added with the micro-media composite carbon material 2, and the micro-media composite The cellulose acetate section of carbon material 2 is to disperse the micro-media ...

Embodiment 3

[0037] Weigh 10g of F127 and dissolve it in 150g of ethanol to form a clear solution at 40°C, add 50g of resole phenolic resin (20wt% ethanol solution), and continue stirring for 2h. Add 16g of activated carbon (same as in Example 1) and continue to stir until the ethanol volatilizes, and then further thermally agglomerate in a 100 degree oven for 24 hours. Then, it was calcined at 350°C for 3h and 900°C for 2h under the protection of nitrogen to obtain a micro-medium composite carbon material 3 with a specific surface area of ​​943m2 / g, in which the content of mesoporous carbon was 30wt%.

[0038] The micro-media composite carbon material 3 is added to the cigarette holder rod, specifically, the binary composite filter rod is composed of acetate fiber segments and acetate fiber segments added with the micro-media composite carbon material 3, and the micro-media composite The cellulose acetate section of the carbon material 3 is to uniformly disperse the micro-media composite ...

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Abstract

The invention discloses a microporous-mesoporous composite material and a preparation method thereof. The method comprises the following steps: smashing tobacco stems, mixing with an activating agent and charring for 1-2 hours to obtain a microporous active carbon material; dissolving phenol, adding NaOH, stirring uniformly, dropwise adding an aqueous solution of formaldehyde, heating continually, reacting continually for 0.5-2 hours after the temperature reaches 70-75 DEG C, regulating the pH value to 7.0 by using HCl after the reaction is finished, dehydrating in vacuum at the temperature of 50 DEG C, and dissolving the product into ethanol to obtain an ethanol solution of a resol precursor; fully dissolving a template agent into the ethanol solution, adding the ethanol solution of the resol precursor, adding a microporous active carbon material, stirring continually till ethanol vaporizes, and calcining under the protection of nitrogen to obtain the microporous-mesoporous composite material. By using the composite material, the release amount of harmful components in the smoke gas of cigarettes can be reduced effectively, and the reducing effect on crotonaldehyde and NNK (Nitrosamine) is remarkable.

Description

technical field [0001] The invention relates to a micro-mesoporous carbon-carbon composite material and a preparation method thereof, and is applied to cigarettes to effectively reduce the content of harmful components in smoke. Background technique [0002] With the progress of society, smoking and environmental issues have attracted worldwide attention. The "Framework Convention on Tobacco Control" requires governments to formulate more stringent "tobacco control" laws and regulations, urging cigarette manufacturers to strictly control the release of major harmful components in cigarette smoke while reducing the amount of tar released from cigarettes. In 2009, the Zhengzhou Tobacco Research Institute led a study on the cigarette smoke hazard index of Chinese-style cigarettes, and selected seven representative components as cigarette hazard evaluation indicators, such as CO, HCN, NNK, B[a] P, phenol, etc. At the end of the last century, activated carbon has been widely us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02A24D3/10C01B32/05C01B32/324
Inventor 戴亚俞海军马扩彦汪长国孙玉峰
Owner CHONGQING CHINA TOBACCO IND CO LTD
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