CN103689793B - Modified corncob porous material and application thereof in cigarettes - Google Patents

Abstract

The invention discloses a modified corn cob porous material and its application in cigarettes. The porous material is obtained after the corncobs undergo microwave expansion, crushing and granulation, modifier modification, microwave expansion drying and the like. The modified corn cob porous material is applied to the cigarette filter tip, and the addition amount is 18-52% of the total weight of the tip rod, and the binary composite tip rod is prepared and applied to the cigarette. The practical application shows that it can effectively reduce components such as tar, nicotine, hydrogen cyanide and phenol in cigarette smoke. The invention has simple and convenient operation, low cost and good application prospect.

Description

A modified corncob porous material and its application in cigarettes

technical field

The invention belongs to the technical field of cigarette materials, and in particular relates to a porous material prepared by using corn cobs through chemical modification. At the same time, the invention also relates to the application of the porous material in cigarette processing.

Background technique

Corn is the main food crop in my country, and its total output and export volume both rank first in the world. The total annual output of corn in my country is about 150 million tons, and it can produce more than 20 million tons of corn cobs every year. Corncobs, like wood, are plant fiber raw materials, mainly composed of 35% to 40% hemicellulose, 32% to 36% cellulose, 17% to 20% lignin and 1.2% to 1.8% ash. Moreover, the corn cob has uniform structure, suitable hardness, good toughness, strong water absorption, and is easy to process. In addition to being partially used as raw materials for products such as furfural and xylitol, a large part of corncobs is directly burned as agricultural waste. Therefore, for many years, scientific researchers have conducted a lot of research on the comprehensive development and utilization of corncobs, such as being used in various fields such as papermaking, biological sugar production, and sewage treatment.

Due to the porous structure of corncob itself, it has good adsorption performance. Researchers have chemically modified corncob and converted it into activated carbon for sewage treatment, which can well absorb heavy metals and Chemical pollutants such as phenol and dyes. As the problems of smoking and health attract more and more attention, how to improve the smoking safety of cigarettes, reduce the harmful components in cigarette smoke, and improve the comfort of smoking has become a hot spot in the research and development of various cigarette manufacturers. However, there are few reports about using corncobs as raw materials to prepare porous materials that can effectively reduce chemical components such as tar, nicotine, hydrogen cyanide, and phenol in cigarette smoke, which is also a technical problem to be solved in this field.

Contents of the invention

The purpose of the present invention is to provide a modified corncob porous material that can effectively reduce some harmful components in cigarette smoke against the shortcomings of the prior art.

The object of the present invention is also to provide the application of the modified corn cob porous material in cigarette production.

The purpose of the present invention is achieved through the following technical solutions.

* Unless otherwise specified, the percentages used in the present invention are all mass percentages.

A modified corncob porous material is prepared by the following steps:

(1) Put corncobs with a moisture content of 20% to 28% in a microwave expansion device, and expand them for 60 to 90 seconds at a power of 1200 to 1500W;

(2) Spray the expanded corn cobs repeatedly with distilled water, adjust the moisture content to 22%-25%, and place it at room temperature for 6-12 hours, crush it into 20-80 mesh particles, and set aside;

(3) Prepare a metal salt aqueous solution with a concentration of 0.5% to 15% with distilled water, adjust the pH value of the solution to 2 to 3 with concentrated hydrochloric acid, and obtain a modified solution for future use; the metal salts are zinc chloride, zinc sulfate, One of copper chloride, copper sulfate, ferric chloride, ferric sulfate or any mixture of several;

(4) Weigh 20-30 parts of spare corncob particles according to the number of parts by mass, place them in 40-80 parts of spare modified solution, stir evenly for 2 hours under the condition of solution temperature of 50-90°C, and cool naturally to room temperature, remove the solvent;

(5) Put the corncob particles from which the solvent has been removed in a microwave expansion device, and dry and expand them for 60-120 seconds under the condition of a power of 500-1000W to obtain the desired modified corncob husk porous material.

The application of the modified corncob porous material in cigarette production is specifically: adding the modified corncob porous material into a cigarette filter through a composite filter rod forming machine to prepare a binary composite tip.

The added amount is preferably 18-52% of the total weight of the mouthpiece.

Compared with the prior art, the present invention has the following advantages:

1. The modified corn cob porous material obtained by this method has a multi-level pore structure composed of macropores, mesopores and micropores, and has a high specific surface area. Metal salts can be evenly dispersed in the porous material, and the flue gas When passing through the filter rod containing the porous material, it can fully contact the porous material and the metal salt therein, and fully absorb components such as tar, nicotine, phenol, hydrogen cyanide and the like in the cigarette smoke by means of physical adsorption and chemical adsorption.

2. The present invention is easy to operate, easy to obtain raw materials, low in cost, and has good application prospects.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the technical solution of the present invention.

Example 1

Adjust the water content of the corn cob to 25%, then place it in a microwave expansion device, expand it under 1200w power for 60 seconds, spray the expanded corn cob with distilled water repeatedly to make the moisture content of the corn cob 25%, and store it at room temperature After standing for 6 hours, it was pulverized and sieved to obtain 50-mesh particles. Weigh 500g of the sieved particles and put them into 1kg copper chloride solution (concentration: 1%, pH: 3), stir evenly at the solution temperature of 60°C for 2h, cool to room temperature naturally, put the solvent-removed particles in In a microwave expansion device, dry for 30 seconds under the condition of a power of 600W, and place it at room temperature, and the desired modified corncob porous material is prepared.

Example 2

Adjust the water content of the corn cob to 28%, then place it in a microwave expansion device, expand it for 90 seconds at a power of 1200w, spray the expanded corn cob with distilled water repeatedly to make the moisture content of the corn cob 25%, and store it at room temperature After standing for 10 hours, it was pulverized and sieved to obtain 80-mesh particles. Weigh 500 grams of copper chloride and 300 grams of zinc chloride and dissolve them in 10.2 kg of water and adjust the pH value of the solution to 2. Weigh 5 kg of sieved particles and put them into the mixed solution, and stir evenly at the solution temperature of 80 ° C for 2 hours , after naturally cooling to room temperature, the solvent-removed particles were placed in a microwave expansion device, dried for 60s under the condition of a power of 800W, and placed at room temperature, that is, the desired modified corncob porous material was prepared.

Example 3

Adjust the water content of the corn cob to 20%, then place it in a microwave expansion device, expand it for 90 seconds at a power of 1500w, spray the expanded corn cob with distilled water repeatedly to make the moisture content of the corn cob 25%, and store it at room temperature After standing for 12 hours, it was pulverized and sieved to obtain 60-mesh particles. Take by weighing 500 grams of zinc sulfate, 800 grams of ferric chloride and 200 grams of copper chloride and dissolve them in 20.5kg of water, and adjust the pH value of the solution to 3, take by weighing 10kg of sieved particles and put them into the mixed solution. Stir evenly at 90°C for 2 hours, cool to room temperature naturally, place in a microwave expansion device, place the solvent-removed particles in a microwave expansion device, dry for 60 seconds under the condition of a power of 1000W, and place it at room temperature to prepare the obtained The desired modified corn cob porous material.

Example 4

Repeat Example 1, with the following differences: the modification solution is 1 kg copper sulfate solution (concentration is 1%, pH is 3).

Example 5

Repeat Example 2, with the following differences: the modified solution is a solution prepared by dissolving 500 grams of copper sulfate and 300 grams of zinc sulfate in 10.2 kg of water and adjusting the pH value to 2.

Example 6

Repeat Example 3, with the following differences: the modified solution is a solution prepared by dissolving 500 grams of zinc chloride, 800 grams of ferric sulfate and 200 grams of copper sulfate in 20.5kg of water and adjusting the pH value to 3.

Application Example 1

The modified corncob porous material obtained in Example 1 is added to the cigarette filter tip by a composite filter rod forming machine, and the addition amount is 25% of the total weight of the tip rod, and a binary composite tip rod is prepared and prepared into a cigarette. The processing conditions of the control blank samples were the same, and the components of cigarette smoke were detected at the same time. The results showed that the tar in cigarette smoke decreased by 11.5%, the nicotine decreased by 15.8%, the hydrogen cyanide decreased by 21.0%, and the phenol decreased by 26.3%. The sensory evaluation of the sample and the control shows that the sample can obviously enrich the natural aroma of the cigarette, and has no obvious influence on the overall style of the cigarette.

Application Example 2

The modified corn cob porous material obtained in Example 2 is added to the cigarette filter through a composite filter rod forming machine, and the addition amount is 28% of the total weight of the tip, and a binary composite tip is prepared and prepared into a cigarette. The processing conditions of the control blank samples were the same, and the components of cigarette smoke were detected at the same time. The results showed that the tar in cigarette smoke decreased by 9.8%, nicotine by 12.6%, hydrogen cyanide by 23.6%, and phenol by 22.0%. The sensory evaluation of the sample and the control shows that the sample can obviously enrich the natural aroma of the cigarette, and has no obvious influence on the overall style of the cigarette.

Application Example 3

The modified corn cob porous material obtained in Example 3 is added to the cigarette filter through a composite filter rod forming machine, and the addition amount is 18% of the total weight of the tip, and a binary composite tip is prepared and prepared into a cigarette. The processing conditions of the control blank samples were the same, and the components of cigarette smoke were detected at the same time. The results showed that the tar in cigarette smoke decreased by 10.3%, nicotine decreased by 6.5%, hydrogen cyanide decreased by 9.0%, and phenol decreased by 17.6%. The sensory evaluation of the sample and the control shows that the sample can obviously enrich the natural aroma of the cigarette, and has no obvious influence on the overall style of the cigarette.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (3)

1. a modified corn core porous material, is obtained by the method for following steps:

(1) be the corncob of 20% ~ 28% by moisture content, be placed in microwave expansion equipment, expand 60 ~ 90s under power 1200 ~ 1500W condition;

(2) the corncob distilled water after expanding sprays repeatedly, regulates moisture content to 22% ~ 25%, and is positioned over equilibrate at room temperature 6 ~ 12 hours, be crushed to 20 ~ 80 order particles, for subsequent use;

(3) be the aqueous metal salt of 0.5% ~ 15% with distilled water compound concentration mass percent, regulate solution ph to 2 ~ 3 with concentrated hydrochloric acid, obtain modified solution, for subsequent use; Described slaine is a kind of or several arbitrarily mixture in zinc chloride, zinc sulfate, copper chloride, copper sulphate, iron chloride, ferric sulfate;

(4) take the corn cob granule for subsequent use of 20 ~ 30 parts by mass fraction, be placed in 40 ~ 80 parts of modified solutions for subsequent use, be under the condition of 50 ~ 90 DEG C after uniform stirring 2h at solution temperature, naturally cool to room temperature, remove solvent;

(5) corn cob granule except desolventizing is placed in microwave expansion equipment, dry expansion 60 ~ 120 seconds under power 500 ~ 1000W condition, namely obtains required modified corn core porous material.

2. the application of modified corn core porous material in production of cigarettes described in claim 1, is specially: add in cigarette filter by described modified corn core porous material by composite filter forming machine, prepare binary composite tip stick.

3. application according to claim 2, is characterized in that: the addition of described modified corn core porous material is preferably 18 ~ 52% of mouth rod gross weight.