Tobacco fragrance type handkerchief paper and preparation method thereof

Abstract

The invention provides tobacco fragrance type handkerchief paper and a preparation method thereof, and particularly relates to the technical field of handkerchief paper. The preparation method of the tobacco fragrance type handkerchief paper comprises the following steps: mixing broken tobacco leaves with a buffer solution, carrying out ultrasonic treatment, and adding a compound enzyme for enzymolysis, so as to obtain a tobacco extracting solution; mixing carbon nanofibers, a tobacco extracting solution and water to obtain a composite solution; and spraying the composite solution to the surface of a wet paper web to obtain the tobacco aroma type handkerchief paper. According to the method disclosed by the invention, the tobacco extracting solution is obtained by treating the crushed tobacco leaves through ultrasonic-assisted enzymolysis, so that the resistance of biomass is reduced, the combination between enzyme and a substrate is enhanced, and the enzymolysis efficiency and the extraction rate of the tobacco extract are further improved; due to the characteristics of high specific surface area and high free hydroxyl of the carbon nanofibers, the fragrance retention time is prolonged. Through experimental tests, the tobacco fragrance type handkerchief paper obtained by the invention can keep fragrance for 8 days at most in a room temperature environment.

Description

Technical Field

[0001] The invention belongs to the technical field of handkerchief paper, and particularly relates to a tobacco-scented handkerchief paper and a preparation method thereof. Background Art

[0002] Handkerchief paper is inseparable from people's daily life. In recent years, both the production and consumption of handkerchief paper have been increasing year by year, indicating that people's demand for handkerchief paper is increasing. With the improvement of living standards, people's requirements for its quality and functionality are also increasing.

[0003] Most of the handkerchiefs used in daily life are odorless, but handkerchiefs with tobacco flavor can bring more pleasant use to smokers. Tobacco-flavored handkerchiefs are relatively more attractive to smokers, stimulating consumption, and can also bring smokers a better consumption experience. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a tobacco-flavored handkerchief paper and a preparation method thereof. The preparation method provided by the present invention is simple and low in cost, and the obtained tobacco-flavored handkerchief paper has a long fragrance retention time.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] The present invention provides a method for preparing tobacco-scented handkerchief paper, comprising the following steps:

[0007] The crushed tobacco leaves are mixed with a buffer solution and subjected to ultrasonic treatment, and then a composite enzyme is added for enzymolysis to obtain a tobacco extract;

[0008] mixing carbon nanofibers, tobacco extract and water to obtain a composite solution;

[0009] The composite solution is sprayed onto the surface of the wet paper web to obtain tobacco-scented handkerchief paper.

[0010] Preferably, the mass of the carbon nanofibers is 0.01 to 0.03% of the total mass of the carbon nanocellulose and water;

[0011] The mass concentration of the tobacco extract in the composite solution is 30-70%.

[0012] Preferably, the volume ratio of the composite solution to the area of ​​the wet paper web is 500-800 mL:1 m 2 .

[0013] Preferably, the power of the ultrasound is 110-140 W, and the time is 20-40 min.

[0014] Preferably, the complex enzyme includes cellulase R 0, one or more of pectinase and complex hemicellulase;

[0015] The dosage of the complex enzyme is 140-160 U / mL;

[0016] The enzymatic hydrolysis time is 2.5 to 4 hours, and the temperature is 50 to 60°C.

[0017] Preferably, the buffer is a phosphate buffer with a concentration of 0.05M;

[0018] The solid-liquid ratio of the shredded tobacco leaves to the buffer solution is 1 g:6-10 mL.

[0019] Preferably, the tobacco extract has a solid content of 5 to 8 wt%.

[0020] Preferably, the preparation of the wet paper web comprises: deflaking, papermaking and forming wood pulp to obtain a wet paper web.

[0021] Preferably, the basis weight of the wet paper web is 50 to 70 g / m 2 .

[0022] The present invention also provides tobacco-scented handkerchief paper obtained by the preparation method described in the above technical solution.

[0023] The invention provides a method for preparing tobacco-flavored handkerchief paper, comprising the following steps: mixing shredded tobacco leaves with a buffer solution and subjecting them to ultrasonic treatment, and then adding a composite enzyme for enzymolysis to obtain a tobacco extract; mixing carbon nanofibers, the tobacco extract and water to obtain a composite solution; and spraying the composite solution onto a surface of a wet paper web to obtain the tobacco-flavored handkerchief paper. The invention adopts ultrasound-assisted enzymolysis to treat crushed tobacco leaves to obtain tobacco extract, utilizes the heat generated by cavitation effect in the ultrasonic process to destroy the cell wall protective layer, causes the cell wall structure to be directly exposed, improves the accessibility of crushed tobacco leaves to enzymes, thereby enhancing mass transfer and accelerating the reaction, thereby reducing the particle size of particles in the crushed tobacco leaf extract, improving the extraction rate, reducing the recalcitrance of biomass, enhancing the binding between enzyme and substrate, thereby improving the enzymolysis efficiency and accelerating the enzymolysis reaction rate; at the same time, enzyme / ultrasound combined treatment can improve the enzyme treatment process, improve the enzymolysis effect, and reduce the high production cost generated by single enzyme treatment; carbon nanofibers as green adsorption carriers have the characteristics of high specific surface area and high free hydroxyl groups, the high specific surface area can adsorb a large amount of tobacco extract, and improve the retention time of tobacco flavor on paper, and the presence of high free hydroxyl groups enables the carbon nanofibers to form hydrogen bonds with free hydrogen atoms and oxygen atoms on the wet paper web on the forming network after spraying, and more efficiently retain the carried tobacco extract, further extending the retention time. Through experimental tests, the tobacco-scented handkerchief paper obtained by the present invention can retain the fragrance for up to 8 days in a room temperature environment. DETAILED DESCRIPTION

[0024] The present invention provides a method for preparing tobacco-scented handkerchief paper, comprising the following steps:

[0025] The crushed tobacco leaves are mixed with a buffer solution and subjected to ultrasonic treatment, and then a composite enzyme is added for enzymolysis to obtain a tobacco extract;

[0026] mixing carbon nanofibers, tobacco extract and water to obtain a composite solution;

[0027] The composite solution is sprayed onto the surface of the wet paper web to obtain tobacco-scented handkerchief paper.

[0028] In the present invention, unless otherwise specified, the raw materials and equipment used are commercially available products well known in the art.

[0029] The invention mixes the crushed tobacco leaves with the buffer solution, performs ultrasonic treatment, and then adds a composite enzyme for enzymolysis to obtain the tobacco extract.

[0030] In the present invention, the shredded tobacco leaves are preferably crushed and sieved before being mixed with the buffer solution and subjected to ultrasound, and the mesh size of the sieve is preferably 40 to 60 meshes.

[0031] In the present invention, the buffer is preferably a phosphate buffer, and the concentration is preferably 0.05M; the solid-liquid ratio of the shredded tobacco leaves to the buffer is preferably 1g:6-10mL, and more preferably 1g:7-9mL. In a specific embodiment of the present invention, the solid-liquid ratio of the shredded tobacco leaves to the buffer is 1g:10mL. The pH value is regulated by the buffer so that the enzyme can obtain the extract more efficiently.

[0032] In the present invention, the power of the ultrasound is preferably 110 to 140 W, more preferably 120 to 130 W, and the time is preferably 20 to 40 min, more preferably 30 to 35 min. The present invention utilizes the cavitation phenomenon of ultrasound to destroy the structure of biomass resources, reduce the recalcitrance of biomass, enhance the binding between enzyme and substrate, thereby improving the enzymolysis efficiency and accelerating the enzymolysis reaction rate.

[0033] In the present invention, the composite enzyme preferably includes cellulase R 0 , pectinase and composite hemicellulase, one or more thereof, more preferably cellulase R 0 , pectinase and composite hemicellulase combination; the cellulase R 0 The mass ratio of pectinase and composite hemicellulase is preferably 1:1:2.

[0034] In the present invention, the dosage of the complex enzyme is preferably 140-160 U / mL, more preferably 145-155 U / mL, and further preferably 150 U / mL. In the present invention, the enzymatic hydrolysis time is preferably 2.5-4 hours, more preferably 3 hours, and the temperature is preferably 50-60° C., more preferably 53-58° C., and further preferably 55° C. Enzymatic hydrolysis can improve the extraction rate of tobacco extract, and at the same time can reduce the content of macromolecular substances in the cell wall, thereby reducing the irritation to tobacco.

[0035] In the present invention, the enzymatic hydrolysis preferably further comprises heating the obtained enzymatic hydrolysate and performing solid-liquid separation, wherein the heating temperature is preferably 100° C. and the heating time is preferably 10 min. The enzyme is inactivated by heating.

[0036] The present invention has no special requirements for the solid-liquid separation, and the commonly used technical means in the art can be used. In a specific embodiment of the present invention, separation is performed by centrifugation.

[0037] The invention utilizes ultrasound-assisted enzyme method to prepare tobacco extract, increases the content of hydrocarbon, alcohol, aldehyde, ketone and ester flavor components in the extract, improves the suction performance and aroma of handkerchief paper in the subsequent coating process, and prolongs the fragrance retention time.

[0038] In the present invention, the solid content of the tobacco extract is preferably 5-8wt%, more preferably 6wt%.

[0039] After obtaining the tobacco extract, the present invention mixes the carbon nanofibers, the tobacco extract and water to obtain a composite solution.

[0040] In the present invention, the mass of the carbon nanofibers is preferably 0.01-0.03% of the total mass of the carbon nanocellulose and water, and more preferably 0.02%.

[0041] In the present invention, the mass concentration of the tobacco extract in the composite solution is preferably 1-3%. In a specific embodiment of the present invention, the mass concentration of the tobacco extract in the composite solution is 1%, 1.5%, 2%, 2.5% or 3%.

[0042] In the present invention, the mixing of carbon nanofibers, tobacco extract and water preferably comprises: mixing carbon nanofibers with water to obtain a carbon nanofiber solution, and then mixing tobacco extract with the carbon nanofiber solution to obtain a composite solution.

[0043] The present invention utilizes the high specific surface area and high free hydroxyl characteristics of carbon nanofibers to extend the fragrance retention time. The high specific surface area can absorb a large amount of tobacco extract. The presence of high free hydroxyl groups enables the carbon nanofibers to form hydrogen bonds with free hydrogen atoms and oxygen atoms on the wet paper web on the forming network after spraying, thereby more efficiently retaining the carried tobacco extract.

[0044] After obtaining the composite solution, the present invention sprays the composite solution onto the surface of the wet paper web and dries it to obtain the tobacco-scented handkerchief paper.

[0045] In the present invention, the preparation of the wet paper web preferably includes: deflaking, papermaking, and forming wood pulp to obtain a wet paper web.

[0046] In the present invention, the wood pulp slurry preferably includes coniferous wood pulp. Specifically, the coniferous wood pulp is deflated until there are no small pulp lumps, placed in a pulping machine and beaten to 30°SR, taken out and dried, and then broken up, placed in a sealed bag and placed at 0-5°C to evenly adjust the moisture content, to obtain wood pulp slurry, which is refrigerated for use. In the present invention, the water content of the wood pulp slurry is preferably 65-75%.

[0047] In the present invention, the deflaking speed is preferably 8500-10000 rpm, more preferably 9000-9500 rpm, and the time is preferably 4-8 min, more preferably 5-7 min. The present invention has no special requirements for the deflaking method, and conventional means in the art can be used.

[0048] The present invention has no special requirements for the papermaking, and conventional means in the art may be used. In a specific embodiment of the present invention, a rapid paper sheet former is used for papermaking.

[0049] The present invention has no special requirements for the forming, and conventional means in the art can be used. In a specific embodiment of the present invention, the forming is performed on a forming net of a rapid paper sheet former. The forming net is matched with a rapid paper sheet former, M10097, Germany.

[0050] In the present invention, the basis weight of the wet paper web is 50 to 70 g / m 2 , more preferably 60g / m 2 .

[0051] In the present invention, the volume ratio of the composite solution to the area of ​​the wet paper web is preferably 500 to 800 mL: 1 m 2 , more preferably 600 to 650 mL:1m 2 In a specific embodiment of the present invention, 20 mL of tobacco-CNF composite solution was sprayed onto the forming net at 3.14×10 -2 m 2 On wet paper web, converted to 637mL / m 2 .

[0052] In the present invention, the spraying method is preferably to use a spraying device for spraying, and the distance between the nozzle of the spraying device and the wet paper web is preferably 15 to 25 cm, and the angle is preferably 90 degrees. The prepared solution is sprayed evenly on the surface of the wet paper web by using the spraying device, and a small amount of addition and multiple spraying are possible, with a large spraying area, uniform spraying, and efficient utilization. Spraying at 90 degrees within a reasonable range can be implemented, so that the amount sprayed to each part of the wet paper web is more uniform.

[0053] In the present invention, the spraying preferably further comprises vacuum drying in a rapid paper sheet former.

[0054] The present invention also provides tobacco-scented handkerchief paper obtained by the preparation method described in the above technical solution.

[0055] The tobacco-scented handkerchief paper obtained by the invention can retain the fragrance for up to 8 days in a room temperature environment.

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in conjunction with specific embodiments below. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Any modification, equivalent replacement, improvement, etc. made to the implementation methods of the present invention based on the technical essence and general principles of the present invention without creative work should be within the scope of protection of the present invention.

[0057] Slurry preparation

[0058] Weigh coniferous wood pulp (name, Moon; origin, Canada; tree species, spruce) and put it in a deflaker. Soak it in 5L of water for 4h. Tear the large pulp board into small pieces of 4cm×4cm and put it in the pulp tank of the Wall-E pulper. Add 18L of deionized water at 20℃ for pulping and deflaking. After 5min, until there are no small pulp lumps, the deflaked pulp is obtained.

[0059] The defragmented pulp was refined with a vertical pulper, and after grinding to 30oSR with a gap of 0.075mm, it was spun dry and dispersed in a disperser, put into sealed bags, and placed in a refrigerator to even out the moisture content. The moisture content of the dispersed pulp was measured to be 65-75%, and wood pulp was obtained, which was stored at 5°C for later use.

[0060] Preparation of tobacco extract

[0061] The tobacco leaves were crushed in a high-speed grinder, passed through a 40-60 mesh sieve, 20 g of the crushed tobacco leaves were placed in a conical flask, 200 mL of phosphate buffer (0.05 M, pH 7) was added, and ultrasonic treatment was performed at 120 W for 30 min. The compound enzyme (cellulase R 0, pectinase, and composite hemicellulase (in a mass ratio of 1:1:2) were used at a dosage of 150 U / mL and treated at 55°C for 3 hours. After the reaction, the enzyme was inactivated by boiling at 100°C for 10 minutes and centrifuged at 15000 rpm to obtain a tobacco extract having a solid content of 6 wt%.

[0062] Example 1

[0063] The wood pulp slurry is deflated in a deflagrator at 9000 rpm, and the deflagrated wood pulp slurry is used in a rapid paper former to obtain a certain amount of 60 g / m 2 of wet paper.

[0064] Carbon nanofiber CNF was mixed with deionized water to obtain a 0.02wt% CNF solution. Tobacco extract was added to the 0.02wt% CNF solution to obtain a 30% tobacco-CNF composite solution (i.e., 30g tobacco extract and 70g 0.02wt% CNF solution). 20mL of the tobacco-CNF composite solution was placed in a spraying device and sprayed onto the surface of the paper sheet at a uniform speed at a spraying angle of 90° within a distance of 15cm from the wet paper web, and then dried.

[0065] Example 2

[0066] The tobacco extract was added to the 0.02 wt % CNF solution to obtain a 40 wt % tobacco-CNF composite solution (ie, 40 g tobacco extract / 60 g 0.02 wt % CNF solution). Other conditions were the same as those in Example 1.

[0067] Example 3

[0068] The tobacco extract was added to the 0.02 wt % CNF solution to obtain a 50 wt % tobacco-CNF composite solution (ie, 50 g tobacco extract / 50 g 0.02 wt % CNF solution). Other conditions were the same as those in Example 1.

[0069] Example 4

[0070] The tobacco extract was added to the 0.02 wt % CNF solution to obtain a 60 wt % tobacco-CNF composite solution (ie, 60 g tobacco extract / 40 g 0.02 wt % CNF solution). Other conditions were the same as those in Example 1.

[0071] Example 5

[0072] The tobacco extract was added to the 0.02 wt % CNF solution to obtain a 70 wt % tobacco-CNF composite solution (ie, 70 g tobacco extract / 30 g 0.02 wt % CNF solution). Other conditions were the same as those in Example 1.

[0073] Comparative Example 1

[0074] Take 30g tobacco extract and 70g H 2 O to obtain a tobacco extract with a concentration of 30 wt%. Other conditions are the same as those in Example 1.

[0075] Comparative Example 2

[0076] Take 40g tobacco extract and 60g H 2 O to obtain a tobacco extract with a concentration of 40 wt%. Other conditions are the same as those in Example 1.

[0077] Comparative Example 3

[0078] Take 50g tobacco extract and 50g H 2 O to obtain a tobacco extract with a concentration of 50 wt%. Other conditions are the same as those in Example 1.

[0079] Comparative Example 4

[0080] Take 60g tobacco extract and 40g H 2 O to obtain a tobacco extract with a concentration of 60%. Other conditions are the same as those in Example 1.

[0081] Comparative Example 5

[0082] The tobacco leaves were crushed in a high-speed grinder and passed through a 40-60 mesh sieve. 20 g of the crushed tobacco leaves were placed in a conical flask, and 200 mL of phosphate buffer (0.05 M, pH 7) was added. The compound enzyme (cellulase R 0 The amount of pectinase and composite hemicellulase (mass ratio 1:1:2) was 150 U / mL and treated at 55°C for 3 hours. After the reaction, the enzyme was inactivated by boiling at 100°C for 10 minutes and the tobacco extract was obtained by centrifugation. The content of acid-insoluble lignin in the tobacco extract was 40 wt%.

[0083] Other conditions are the same as in Example 1.

[0084] The tobacco-scented handkerchief papers prepared in Examples 1 to 5 and Comparative Examples 1 to 5 were placed under the test conditions of temperature (23±1)°C and humidity (50±2)%, and their fragrance retention time was tested. The scent smellers were asked to smell the paper samples at regular intervals in the constant temperature and humidity room until the fragrance disappeared, which was the retention time of the tobacco fragrance in the paper samples. The test results are shown in Table 1.

[0085] Table 1 Fragrance retention time of tobacco flavored handkerchief papers prepared in Examples 1 to 5 and Comparative Examples 1 to 5

[0086] Fragrance duration (days) Example 1 3～4 Example 2 4～5 Example 3 5～6 Example 4 6～7 Example 5 7～8 Comparative Example 1 1～2 Comparative Example 2 1.5～2.5 Comparative Example 3 2～3 Comparative Example 4 3～4 Comparative Example 5 1

[0087] As can be seen from Table 1, the tobacco-flavored handkerchief paper prepared by the present invention can retain fragrance for up to 8 days. By comparing the results of Examples 1 to 4 with those of Comparative Examples 1 to 4, it can be seen that the presence of CNF prolongs the fragrance retention time of the tobacco-flavored handkerchief paper; by comparing the results of Example 1 with those of Comparative Example 5, it can be seen that the tobacco extract prepared by ultrasound-assisted enzyme method further prolongs the fragrance retention time of the tobacco-flavored handkerchief paper.

[0088] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing tobacco-flavored handkerchief paper, characterized in that: The following steps are involved: The crushed tobacco leaves are mixed with a buffer solution and subjected to ultrasonic treatment, and then a composite enzyme is added for enzymolysis to obtain a tobacco extract; mixing carbon nanofibers, tobacco extract and water to obtain a composite solution; The composite solution is sprayed onto the surface of the wet paper web and dried to obtain the tobacco-scented handkerchief paper.

2. The preparation method according to claim 1, characterized in that: The mass of the carbon nanofibers is 0.01 to 0.03% of the total mass of the carbon nanocellulose and water; The mass concentration of the tobacco extract in the composite solution is 30-70%.

3. The preparation method according to claim 1 or 2, wherein the ratio of the volume of the composite solution to the area of ​​the wet paper web is 500-800 mL:1 m 2 .

4. The preparation method according to claim 1, characterized in that: The power of the ultrasound is 110-140W, and the time is 20-40min.

5. The preparation method according to claim 1, characterized in that: The complex enzyme includes one or more of cellulase R0, pectinase and complex hemicellulase; The dosage of the complex enzyme is 140-160 U / mL; The enzymatic hydrolysis time is 2.5 to 4 hours, and the temperature is 50 to 60°C.

6. The preparation method according to claim 1, characterized in that: The buffer is a phosphate buffer with a concentration of 0.05M; The solid-liquid ratio of the shredded tobacco leaves to the buffer solution is 1 g:6-10 mL.

7. The preparation method according to any one of claims 1 to 3 and 4 to 6, characterized in that: The solid content of the tobacco extract is 5-8wt%.

8. The preparation method according to claim 1, characterized in that: The preparation of the wet paper web comprises: deflaking, papermaking and forming wood pulp to obtain the wet paper web.

9. The preparation method according to claim 1 or 8, characterized in that: The basis weight of the wet paper web is 50 to 70 g / m 2 .

10. Tobacco-flavored handkerchief paper obtained by the preparation method according to any one of claims 1 to 9.