Tobacco humectant based on amino acid / glycerol supramolecular compound

Abstract

The invention belongs to the technical field of tobacco humectants, and particularly relates to a tobacco humectant based on an amino acid / glycerol supramolecular compound, which mainly comprises a supramolecular compound formed by glycerol and amino acid through hydrogen bonds. The tobacco humectant disclosed by the invention can keep physical humectant and sensory humectant at the same time, does not influence the smoking quality of cigarettes, can improve the sweetness of smoke, and is an ideal humectant component. According to the technical scheme, based on the fact that glycerin contains rich hydroxyl groups, amino acids containing different N atom functional groups are selected to form hydrogen bonds with glycerin, supramolecular acting force exists, the moisture locking capacity is weakened, and the moisture-proof capacity of glycerin is improved. According to the technical scheme, operation is easy and convenient, working efficiency is high, and the working cost of moisture preservation is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco humectants, and in particular relates to a tobacco humectant based on an amino acid / glycerol supramolecular complex. Background Art

[0002] In cigarette production, humectants are usually needed to improve the physical moisturizing properties and processing resistance of cigarettes. Humectants are a type of substance that can absorb and retain moisture from the environment. At the same time, the use of humectants can keep the moisture in tobacco in different regional environments, and plays an important role in the stability of the moisture content of tobacco leaves. It can reduce the dryness and spiciness of the smoke during the smoking process, increase the softness of tobacco leaves, and ensure the smoking quality of cigarettes.

[0003] At present, domestic tobacco companies mainly use polyols such as glycerol, propylene glycol, xylitol and sorbitol as humectants. The hydroxyl groups of these substances can form hydrogen bonds with water molecules, so they have certain hygroscopicity. The water loss in tobacco leaves is mainly due to the dynamic balance between free water and bound water. The force that maintains this dynamic balance is mainly the hydrogen bonds formed between the hydrophilic groups contained in the chemical components of tobacco leaves and water. For example, the invention patent application with application publication number CN114903198A discloses a method for preparing a blocking tobacco humectant and its application in cigarettes. The invention patent application with application publication number CN114223934A discloses a humectant for biomass tobacco and its preparation method and application. The invention patent application with application publication number CN114468334A discloses a carbohydrate humectant, application and method for improving the moistness of tobacco.

[0004] In the prior art, propylene glycol is mostly obtained by importation, which is expensive and not conducive to the independent research and development and application of cigarettes. Moreover, when cigarettes are burned, propylene glycol will be converted into acetaldehyde and acetone, resulting in an increase in the content of harmful substances in the flue gas. At the same time, some propylene glycol and glycerol enter the flue gas to form tar, which is not conducive to tar reduction. The prices of xylitol and sorbitol are relatively low, but their moisturizing properties are limited, and their storage stability is poor, which is not convenient for production and use. However, polyhydric alcohols have poor moisture-proof effects in high humidity environments, and there is a problem of moisture transfer to cigarette paper after moisture absorption. In the prior art, there is a certain gap between the humectant and the finished cigarette tobacco in dealing with different climatic conditions, the stability of the moisture content of tobacco leaves and the improvement of the comfort of cigarette smoking. Summary of the invention

[0005] The purpose of the present invention is to provide a tobacco humectant based on an amino acid / glycerol supramolecular complex. Based on the fact that glycerol contains abundant hydroxyl groups, amino acids containing different N-atom functional groups are selected to form hydrogen bonds with glycerol, thereby weakening the ability to lock in moisture and increasing the moisture-proof ability of glycerol, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions:

[0007] A tobacco humectant based on an amino acid / glycerol supramolecular complex, wherein the main component is a supramolecular complex formed by glycerol and amino acid through hydrogen bonds.

[0008] Furthermore, the weight ratio of the amino acid to glycerol is 1-5:10.

[0009] Furthermore, the amino acids are polar amino acids or non-polar amino acids; the polar amino acids are L-leucine, L-isoleucine, D-alanine, glycine, valine, L-tryptophan, D-tryptophan, and the non-polar amino acids are L-lysine, L-arginine, L-histidine, D-histidine, L-aspartic acid, L-threonine, and L-tyrosine.

[0010] Further, the supramolecular complex is one or more of L-leucine / glycerol complex, L-isoleucine / glycerol complex, D-alanine / glycerol complex, glycine / glycerol complex, valine / glycerol complex, L-tryptophan / glycerol complex, D-tryptophan / glycerol complex, L-lysine / glycerol complex, L-arginine / glycerol complex, L-histidine / glycerol complex, D-histidine / glycerol complex, L-aspartic acid / glycerol complex, L-threonine / glycerol complex, and L-tyrosine / glycerol complex.

[0011] Furthermore, the method for preparing the supramolecular complex comprises the following steps:

[0012] 1) Weigh a set amount of glycerol and add amino acids to it;

[0013] 2) Stirring at a fixed speed at a set temperature;

[0014] 3) After the mixing is completed, the mixture is allowed to stand to obtain a supramolecular complex.

[0015] Furthermore, any of the supramolecular complexes described above is used as a tobacco humectant.

[0016] Furthermore, in the tobacco leaf adding process, the tobacco humectant is applied to the tobacco leaves by spraying.

[0017] Furthermore, the tobacco leaves are tobacco leaves without any flavoring or additives added.

[0018] Furthermore, the method for applying the tobacco humectant comprises the following steps:

[0019] S1, weighing a set weight of the supramolecular complex and dispersing it in water;

[0020] S2, spraying the dispersed supramolecular complex uniformly on a set weight portion of tobacco leaves;

[0021] S3, placing the tobacco leaves sprayed with the humectant to dry naturally at room temperature for 24 hours;

[0022] S4. Place the dried tobacco leaves in a constant temperature and humidity chamber to balance the moisture.

[0023] The beneficial effects of the present invention are:

[0024] 1. The tobacco humectant of the present invention can maintain physical humectancy and sensory humectancy at the same time, does not affect the smoking quality of the cigarette, and can improve the sweetness of the smoke, and is an ideal humectant component.

[0025] 2. The tobacco humectant of the present invention is based on the fact that glycerol contains abundant hydroxyl groups, and amino acids containing different N atom functional groups are selected to form hydrogen bonds with glycerol, resulting in supramolecular forces, which weaken the ability to lock in moisture and increase the moisture-proof ability of glycerol. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The microscopic morphology of the surface of a blank tobacco leaf observed using a scanning electron microscope in Example 1 of the present invention (A1: magnified 500 times, A2: magnified 1000 times);

[0027] Figure 2 The microscopic morphology of the tobacco leaf surface after spraying the humectant in Example 1 of the present invention is observed using a scanning electron microscope (B1: magnified 500 times, B2: magnified 1000 times);

[0028] Figure 3 is the thermogravimetric analysis of the humectant in Example 1 of the present invention;

[0029] Figure 4 is a contact angle diagram of completely dried tobacco leaves of the present invention;

[0030] Figure 5 This is a contact angle diagram of the tobacco leaves after spraying the L-histidine / glycerol complex humectant and balancing in Example 1 of the present invention. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is described in detail below through examples. The following examples are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, but cannot be construed as limiting the technical solution of the present invention.

[0032] Unless otherwise specified, all technical terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0033] The instruments, equipment, reagents and materials used in the examples were all obtained through commercial channels. Glycerol was purchased from Shanghai En Chemical Technology Co., Ltd., and L-histidine was purchased from Shanghai En Chemical Technology Co., Ltd.

[0034] The constant temperature and humidity chamber was purchased from Changge Mingtu Mechanical Equipment Co., Ltd., the electronic analytical balance was purchased from Sartorius Scientific Instruments (Beijing) Co., Ltd., and the collector-type constant temperature heating magnetic stirrer was purchased from Gongyi Yuhua Instrument Co., Ltd.

[0035] The present application provides a tobacco humectant based on an amino acid / glycerol supramolecular complex, wherein the main component of the tobacco humectant is a supramolecular complex formed by glycerol and amino acids through hydrogen bonds.

[0036] In the present application, the weight ratio of amino acid to glycerol is 1-5:10.

[0037] In the present application, amino acids are polar amino acids or non-polar amino acids; polar amino acids are L-leucine, L-isoleucine, D-alanine, glycine, valine, L-tryptophan, D-tryptophan, and non-polar amino acids are L-lysine, L-arginine, L-histidine, D-histidine, L-aspartic acid, L-threonine, and L-tyrosine.

[0038] In the present application, the supramolecular complex is one or more of L-leucine / glycerol complex, L-isoleucine / glycerol complex, D-alanine / glycerol complex, glycine / glycerol complex, valine / glycerol complex, L-tryptophan / glycerol complex, D-tryptophan / glycerol complex, L-lysine / glycerol complex, L-arginine / glycerol complex, L-histidine / glycerol complex, D-histidine / glycerol complex, L-aspartic acid / glycerol complex, L-threonine / glycerol complex, and L-tyrosine / glycerol complex. In the technical scheme of the present application, a polar supramolecular complex prepared from polar amino acids and glycerol and a non-polar supramolecular complex prepared from non-polar amino acids and glycerol can be formulated into a composite supramolecular complex according to a set ratio for use as a tobacco humectant. The weight ratio of the polar supramolecular complex to the non-polar supramolecular complex is 3:7-7:3, preferably, the weight ratio of the two is 2:3.

[0039] In the present application, the method for preparing the supramolecular complex comprises the following steps:

[0040] 1) Weigh a set amount of glycerol and add amino acids to it;

[0041] 2) Stirring at a fixed speed at a set temperature;

[0042] 3) After the mixing is completed, the mixture is allowed to stand to obtain a supramolecular complex.

[0043] In the present application, any of the supramolecular complexes described above is used as a tobacco humectant. In the tobacco leaf feeding process, the tobacco humectant is applied to the tobacco leaves by spraying. The tobacco leaves are tobacco leaves without flavoring or adding any other flavoring or adding any other flavoring.

[0044] In the present application, the method for applying the tobacco humectant adopts the following steps:

[0045] S1, weighing a set weight of the supramolecular complex and dispersing it in water;

[0046] S2, spraying the dispersed supramolecular complex uniformly on a set weight portion of tobacco leaves;

[0047] S3, placing the tobacco leaves sprayed with the humectant to dry naturally at room temperature for 24 hours;

[0048] S4. Place the dried tobacco leaves in a constant temperature and humidity chamber to balance the moisture.

[0049] Example 1

[0050] like Figures 1 to 5 As shown, this example is used to evaluate the physical moisturizing properties of the amino acid / glycerol supramolecular complex of the present invention as a tobacco moisturizer, and the specific method is as follows:

[0051] Set up a blank group: take 10 ml of water and spray it evenly on 10 g of tobacco leaves without flavoring or additives. Place the tobacco leaves sprayed with water to dry naturally at room temperature for 24 hours, and then place the tobacco leaves in a constant temperature and humidity chamber for equilibrium.

[0052] At the same time, weigh 1 part of L-histidine and 10 parts of glycerol respectively and add them into a transparent glass vial, and stir at 400-700 r / min, 50-70 ℃ for 2-4 hours. Prepare L-histidine / glycerol complex 1#. Let it stand for a while and observe the state of the amino acid / glycerol supramolecular complex system. After the amino acid / glycerol supramolecular complex system is homogeneously stable, take 1 part of L-histidine / glycerol complex 1# and disperse it with 10 ml of water, then spray it evenly on 10 g of tobacco leaves. Place the tobacco leaves sprayed with the humectant at room temperature to dry naturally for 24 hours so that the humectant can be fully absorbed by the tobacco leaves. Subsequently, place the tobacco leaves in a constant temperature and humidity chamber to balance the moisture and test its equilibrium moisture content.

[0053] Example 2

[0054] The difference from Example 1 is that 2 parts of L-histidine and 10 parts of glycerol are weighed and added into a transparent glass vial, and other process conditions remain unchanged from Example 1, to prepare L-histidine / glycerol complex 2#.

[0055] Example 3

[0056] The difference from Example 1 is that 3 parts of L-histidine and 10 parts of glycerol were weighed and added into a transparent glass vial, and other process conditions remained the same as in Example 1, to prepare L-histidine / glycerol complex 3#.

[0057] Table 1 Equilibrium moisture content of humectants at corresponding temperature and humidity

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A tobacco humectant based on an amino acid / glycerol supramolecular complex, characterized in that: Its main component is a supramolecular complex formed by glycerol and amino acids through hydrogen bonds.

2. The tobacco humectant based on amino acid / glycerol supramolecular complex according to claim 1, characterized in that: The weight ratio of the amino acid to glycerol is 1-5:

10.

3. The tobacco humectant based on amino acid / glycerol supramolecular complex according to claim 1, characterized in that: The amino acids are polar amino acids or non-polar amino acids; the polar amino acids are L-leucine, L-isoleucine, D-alanine, glycine, valine, L-tryptophan, D-tryptophan, and the non-polar amino acids are L-lysine, L-arginine, L-histidine, D-histidine, L-aspartic acid, L-threonine, and L-tyrosine.

4. The tobacco humectant based on amino acid / glycerol supramolecular complex according to claim 1, characterized in that: The supramolecular complex is one or more of L-leucine / glycerol complex, L-isoleucine / glycerol complex, D-alanine / glycerol complex, glycine / glycerol complex, valine / glycerol complex, L-tryptophan / glycerol complex, D-tryptophan / glycerol complex, L-lysine / glycerol complex, L-arginine / glycerol complex, L-histidine / glycerol complex, D-histidine / glycerol complex, L-aspartic acid / glycerol complex, L-threonine / glycerol complex, and L-tyrosine / glycerol complex.

5. The tobacco humectant based on amino acid / glycerol supramolecular complex according to any one of claims 1 to 4, characterized in that: The method for preparing the supramolecular complex comprises the following steps: 1) Weigh a set amount of glycerol and add amino acids to it; 2) Stirring at a fixed speed at a set temperature; 3) After the mixing is completed, the mixture is allowed to stand to obtain a supramolecular complex.

6. An application, characterized in that: The supramolecular complex according to any one of claims 1 to 5 is used as a tobacco humectant.

7. The use according to claim 6, characterized in that: In the tobacco leaf charging process, tobacco humectant is applied to the tobacco leaves by spraying.

8. The use according to claim 7, characterized in that: The tobacco leaves are tobacco leaves without any flavoring or adding any material.

9. The use according to claim 6, characterized in that: The method for applying the tobacco humectant comprises the following steps: S1, weighing a set weight of the supramolecular complex and dispersing it in water; S2, spraying the dispersed supramolecular complex uniformly on a set weight portion of tobacco leaves; S3, placing the tobacco leaves sprayed with the humectant to dry naturally at room temperature for 24 hours; S4. Place the dried tobacco leaves in a constant temperature and humidity chamber to balance the moisture.

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