CN111328838A - Composite plant extract with antiseptic and bacteriostatic functions and preparation method and application thereof - Google Patents

Abstract

The invention belongs to the technical field of anti-corrosion, and discloses a composite plant extract with anti-corrosion and bacteriostatic functions, comprising the following components: cinnamon extract, clove extract and lemon extract. The lemon extract contains limonene; the composite plant extract may further include at least one of turmeric extract, orange peel extract or star anise extract. The compound plant extract also contains cinnamon extract, clove extract and lemon extract, which has a broad-spectrum antibacterial effect against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Candida albicans, Aspergillus niger , Bacillus cereus has a good bactericidal or inhibitory effect; the addition amount of the compound plant extract in food and daily chemical products, in terms of mass fraction, is 0.04-0.15%, the addition amount is small, but also has a good Antibacterial and antiseptic effect, greatly reducing the cost of use.

Description

Compound plant extract with antiseptic and bacteriostatic function and preparation method and application thereof

technical field

The invention belongs to the technical field of anti-corrosion, and particularly relates to a composite plant extract with anti-corrosion and bacteriostatic functions, a preparation method and application thereof.

Background technique

In the prior art, the common preservatives are mostly chemical synthesis and biosynthesis, which have certain chronic toxic and side effects and have many application restrictions, and most of them only have an inhibitory effect on one or several bacteria, and it is necessary to obtain a wide range of antiseptics. The antibacterial effect of the spectrum requires the combination of a variety of preservatives.

In the prior art, there are also natural plant antibacterial preservatives that can be used in food and daily chemical products (such as cosmetics), such as a bacteriostatic and antiseptic composition composed of plant extracts such as sagebrush, tea, thyme, sage, etc. , a composition with antibacterial effect composed of plant extracts such as Scutellaria baicalensis root, Panax notoginseng root, black bean skin, honeysuckle flower, etc. It is composed of bacteriostatic agents, but its addition amount in food or cosmetics is very high (the addition amount is more than 0.5% by mass fraction). Since the cost of plant extracts is higher than that of chemically synthesized or biosynthesized preservatives, coupled with the large amount of use, the cost of use will be high, which will undoubtedly reduce customers' willingness to buy.

Therefore, it is desirable to provide a plant extract that has a broad-spectrum bacteriostatic effect and is added in a small amount to food or daily chemical products (eg, cosmetics).

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a compound plant extract with antiseptic and bacteriostatic function, the compound plant extract has a broad-spectrum bacteriostatic effect, and the addition amount in food and daily chemical products (such as cosmetics) is 0.04- 0.15% (mass fraction), the addition amount is small, and it also has a good antibacterial and antiseptic effect, which greatly reduces the use cost.

A compound plant extract with antiseptic and antibacterial function, comprising the following components: cinnamon extract, clove extract, lemon extract.

Preferably, a compound plant extract with antiseptic and antibacterial function, in parts by weight, comprises the following components: 3.5-50 parts of cinnamon extract, 3.5-92 parts of clove extract, 1-20 parts of lemon extract .

Preferably, the cinnamon extract is cinnamon bark extract.

Preferably, the cinnamon extract contains trans-cinnamaldehyde and/or trans-o-methoxycinnamaldehyde.

Preferably, the clove extract is a clove flower extract; further preferably, the clove extract is a clove bud extract and/or a clove leaf extract.

Preferably, the clove extract contains isoeugenol and/or eugenol.

Preferably, the lemon extract is lemon peel extract.

Preferably, the lemon extract contains limonene.

Preferably, the compound plant extract with antiseptic and bacteriostatic function further includes turmeric extract. The turmeric extract contains curcumin and/or zingiberene.

Preferably, the compound plant extract with antiseptic and bacteriostatic function further includes orange peel extract. The orange peel extract contains alpha-pinene.

Preferably, the compound plant extract with antiseptic and bacteriostatic function further includes star anise extract. The star anise extract contains anisaldehyde.

Preferably, the compound plant extract with antiseptic and antibacterial function also contains limonene, bamboo ene, patchouli alcohol, baicalin, tanshinone, catechin, honokiol, carvacrol, thymol, myrcene, At least one of beta-pinene or carnosic acid.

Preferably, the composite plant extract, its active ingredients (active ingredients refer to the ingredients that have antiseptic and bacteriostatic effects in each plant extract), in parts by weight, comprise 3-40 parts of trans-cinnamaldehyde, trans- 0.1-5 parts of o-methoxycinnamaldehyde, 3-90 parts of isoeugenol, 0.1-10 parts of limonene.

Further preferably, the composite plant extract, its active ingredients, in parts by weight, comprise 3-40 parts of trans-cinnamaldehyde, 0.1-5 parts of trans-o-methoxycinnamaldehyde, 3-90 parts of isoeugenol parts, Eugenol 0.1-40 parts, Limonene 0.1-10 parts, Limonene 0.1-10 parts, Zingiberene 0.05-5 parts, α-pinene 0.5-5 parts, Curcumin 0.5-10 parts, Anisaldehyde 0.5- 20 servings.

A preparation method of a compound plant extract with antiseptic and bacteriostatic function, comprising the following steps:

(1) Preparation of cinnamon extract: take cinnamon bark, add water, heat, condense and reflux with steam, collect reflux liquid, conduct distillation again, collect distillate, add organic solvent for extraction, and then heat to remove organic solvent to obtain cinnamon extract thing;

(2) preparation of clove extract: take clove, add water, distill, collect distillate, add organic solvent for extraction, fractional distillation under reduced pressure, remove organic solvent, and obtain clove extract;

(3) preparation of lemon extract: take lemon, obtain lemon extract by cold pressing method (cold pressing method is a conventional technique in this industry) or distillation method; then add the cinnamon extract obtained in step (1) and step (2) ) prepared clove extract, stirred to prepare the composite plant extract.

Preferably, the cinnamon bark in step (1) is in powder form.

Preferably, the organic solvent in step (1) is ether; further preferably, the organic solvent is diethyl ether.

Preferably, the cloves described in step (2) are clove buds and/or clove leaves.

Preferably, the organic solvent in step (2) is ester; further preferably, the organic solvent is ethyl acetate.

Preferably, in step (3), after the lemons are extracted by cold pressing, rectification is performed at 103° C. to remove impurities.

Preferably, turmeric extract is also added in the stirring process in step (3), and the preparation method of the turmeric extract is as follows: taking turmeric and adding water, distilling, collecting the distillate, and fractionating under reduced pressure to prepare the turmeric extract.

Preferably, in the stirring process in step (3), the orange peel extract is also added, and the preparation method of the orange peel extract is: taking the orange peel, adding water, distilling, and collecting the distillate to obtain the orange peel extract.

Preferably, in the stirring process in step (3), star anise extract is also added, and the preparation method of the star anise extract is: taking star anise and adding water, distilling, collecting distillate, and fractionating under reduced pressure to obtain star anise extract thing.

Preferably, in the stirring process in step (3), limonene, bamboo ene, patchouli alcohol, baicalin, tanshinone, catechin, honokiol, carvacrol, thymol, myrcene, β-pinene or at least one of carnosic acid.

Preferably, in the stirring process in step (3), at least one of turmeric extract, orange peel extract, star anise extract, limonene, bamboo ene, patchouli alcohol, baicalin, tanshinone, catechin or honokiol is also added A sort of.

A daily chemical product contains the compound plant extract of the present invention.

Preferably, the daily chemical products are cosmetics or fungicides.

Preferably, the cosmetic is any one of moisturizing essence, eye cream, facial cleanser, and facial mask.

A food containing the compound plant extract of the present invention.

Preferably, the food is cooked food, such as shredded kelp and mustard.

Preferably, in the cosmetic or food, the content of the composite plant extract of the present invention is 0.04-0.15% in terms of mass fraction.

With respect to the prior art, the beneficial effects of the present invention are as follows:

(1) The composite plant extract of the present invention contains cinnamon extract, clove extract and lemon extract simultaneously, has broad-spectrum antibacterial effect, and is effective against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa , Candida albicans, Aspergillus niger, Bacillus cereus have good bactericidal or inhibitory effects;

(2) The addition amount of the composite plant extract of the present invention in food and daily chemical products (such as cosmetics) is 0.04-0.15% in terms of mass fraction, the addition amount is small, and it also has a good antibacterial and antiseptic effect. , greatly reducing the cost of use. In addition, the composite plant extract prepared by the present invention also has the effect of anti-oxidation.

(3) The plant extraction method of the present invention has high extraction efficiency, and the prepared plant extract has a high content of active components, for example, the extracted lemon extract has a high content of effective constituent limonene.

Detailed ways

In order to make those skilled in the art understand the technical solutions of the present invention more clearly, the following examples are now given for illustration. It should be noted that the following examples do not limit the protection scope of the present invention.

The raw materials, reagents or devices used in the following examples can be obtained from conventional commercial channels unless otherwise specified, or can be obtained by existing known methods.

Example 1

A preparation method of a compound plant extract with antiseptic and bacteriostatic function, comprising the following steps:

(1) Preparation of cinnamon extract: take 60Kg of powdered cinnamon bark, put it in a flask, add 160 L of water, heat to 100° C., steam condensate and reflux for 10 minutes, collect the reflux liquid, cool, and then distill, and collect the distillate. liquid 90L, transfer the distillate to a separatory funnel, add ether for extraction twice, the amount of ether each time is 40L, discard the water layer, transfer the ether layer into a test tube, add a small amount of anhydrous sodium sulfate to dry, 20 minutes Then, the extract was poured out, and the ether was evaporated by heating with a water bath in a fume hood to obtain 30Kg of cinnamon extract containing trans-cinnamaldehyde and trans-o-methoxycinnamaldehyde;

(2) preparation of clove extract: get 500Kg of clove buds, add 3000L of water, distill, collect 1000L of distillate, place the obtained distillate in a separatory funnel, extract twice with ethyl acetate (every ethyl acetate The consumption of the ester is 600L), merge the upper layer ethyl acetate extract, and then carry out fractional distillation under reduced pressure to remove the ethyl acetate to obtain the clove extract 150Kg containing isoeugenol;

(3) Preparation of lemon extract: take 100Kg of lemon peel, treat the lemon peel with cold pressing, remove impurities to obtain 20Kg of limonene-containing lemon extract; then add the cinnamon extract prepared in step (1) and step (2) The obtained clove extract was stirred, and the stirring speed was 60 rev/min, and the stirring time was 30 minutes to obtain a composite plant extract; the obtained composite plant extract was 200Kg, and wherein trans-cinnamaldehyde was 15Kg , Trans-o-methoxycinnamaldehyde 3Kg, isoeugenol 120Kg, limonene 10Kg.

Example 2

A preparation method of a compound plant extract with antiseptic and bacteriostatic function, comprising the following steps:

(1) Preparation of cinnamon extract: take 50Kg of powdered cinnamon bark, put it into a flask, add 160 L of water, heat to 100° C., steam condensate and reflux for 10 minutes, collect the reflux liquid, cool, and then distill, and collect the distillate. liquid 80L, transfer the distillate to a separatory funnel, add ether for extraction twice, the amount of ether each time is 40L, discard the water layer, transfer the ether layer into a test tube, add a small amount of anhydrous sodium sulfate to dry, 20 minutes Then, the extract was poured out, and the ether was evaporated by heating with a water bath in a fume hood to obtain 25Kg of cinnamon extract containing trans-cinnamaldehyde and trans-o-methoxycinnamaldehyde;

(2) preparation of clove extract: get clove leaf 500Kg, add 3000L of water, distill, collect distillate 1000L, place the obtained distillate in a separatory funnel, extract twice with ethyl acetate (each time acetic acid The consumption of ethyl ester is 600L), merge the upper layer ethyl acetate extract, then carry out fractional distillation under reduced pressure to remove the ethyl acetate to obtain the clove extract 150Kg containing isoeugenol;

(3) Preparation of lemon extract: take 30Kg of lemon peel, add 180L of water, and distill to obtain 10L of distillate to obtain 6Kg of limonene-containing lemon extract; then add the cinnamon extract obtained in step (1) and the steps (2) obtained clove extract, then add the turmeric extract containing curcumin and zingiberene, the preparation method of turmeric extract is: get 50Kg turmeric powder and add 200L of water, distill to obtain 20L of distillate, remove impurities by fractional distillation under reduced pressure Refining to obtain 19Kg of turmeric extract, stirring, the stirring speed is 60 rev/min, and the stirring time is 30 minutes to obtain a composite plant extract; the obtained composite plant extract is 200Kg, of which trans-cinnamaldehyde is 12.5Kg , Trans-o-methoxycinnamaldehyde 2.5Kg, isoeugenol 120Kg, limonene 3Kg, curcumin 7.6Kg, gingerene 1.9Kg.

Example 3

A preparation method of a compound plant extract with antiseptic and bacteriostatic function, comprising the following steps:

(1) Preparation of cinnamon extract: take 50Kg of powdered cinnamon bark, put it into a flask, add 160 L of water, heat to 100° C., steam condensate and reflux for 10 minutes, collect the reflux liquid, cool, and then distill, and collect the distillate. liquid 85L, transfer the distillate to a separatory funnel, add ether for extraction twice, the amount of ether each time is 40L, discard the water layer, transfer the ether layer into a test tube, add a small amount of anhydrous sodium sulfate to dry, 20 minutes Then, the extract was poured out, and the ether was evaporated by heating with a water bath in a fume hood to obtain 25Kg of cinnamon extract containing trans-cinnamaldehyde and trans-o-methoxycinnamaldehyde;

(2) preparation of clove extract: get 500Kg of clove buds, add 3000L of water, distill, collect 1000L of distillate, place the obtained distillate in a separatory funnel, extract twice with ethyl acetate (every ethyl acetate The consumption of the ester is 600L), merge the upper layer ethyl acetate extract, and then carry out fractional distillation under reduced pressure to remove the ethyl acetate to obtain the clove extract 150Kg containing isoeugenol;

(3) Preparation of lemon extract: take 30Kg of lemon peel, add 180L of water, and distill to obtain 10L of distillate to obtain 6Kg of limonene-containing lemon extract; then add the cinnamon extract obtained in step (1) and the steps (2) obtained clove extract, then add turmeric extract, orange peel extract and star anise extract;

The preparation method of turmeric extract is as follows: take 20Kg of turmeric powder and add 200L of water, distill to obtain 20L of distillate, remove impurities by fractional distillation under reduced pressure, and obtain 7.6Kg of plant extract containing curcumin and zingiberene;

The preparation method of the orange peel extract is as follows: take 30Kg of orange peel, add 180L of water, distill, collect 15L of distillate, and obtain 6Kg of the orange peel extract containing α-pinene;

The preparation method of star anise extract is as follows: take 40Kg star anise and add 200 L of water, extract by steam distillation, repeat the extraction twice to collect a total of 30 L of distillate, and fractionate under reduced pressure to obtain 5.4 Kg of star anise extract containing anisaldehyde;

Stir, the stirring speed is 60 rev/min, the stirring time is 30 minutes, and the compound plant extract is prepared; 2.5Kg, isoeugenol 120Kg, limonene 3Kg, curcumin 3Kg, gingerene 1.3Kg, α-pinene 3Kg, anisaldehyde 4Kg.

Example 4

A preparation method of a compound plant extract with antiseptic and bacteriostatic function, comprising the following steps:

(1) Preparation of cinnamon extract: take 60Kg of powdered cinnamon bark, put it in a flask, add 160 L of water, heat to 100° C., steam condensate and reflux for 10 minutes, collect the reflux liquid, cool, and then distill, and collect the distillate. liquid 90L, transfer the distillate to a separatory funnel, add ether for extraction twice, the amount of ether each time is 40L, discard the water layer, transfer the ether layer into a test tube, add a small amount of anhydrous sodium sulfate to dry, 20 minutes Then, the extract was poured out, and the ether was evaporated by heating with a water bath in a fume hood to obtain 30Kg of cinnamon extract containing trans-cinnamaldehyde and trans-o-methoxycinnamaldehyde;

(2) preparation of clove extract: get 500Kg of clove buds, add 3000L of water, distill, collect 1000L of distillate, place the obtained distillate in a separatory funnel, extract twice with ethyl acetate (every ethyl acetate The consumption of the ester is 600L), merge the upper layer ethyl acetate extract, and then carry out fractional distillation under reduced pressure to remove the ethyl acetate to obtain the clove extract 150Kg containing isoeugenol;

(3) preparation of lemon extract: take 50Kg of lemon peel, process lemon peel with cold pressing, remove impurities, and obtain limonene-containing lemon extract 10Kg;

(4) Preparation of patchouli extract: take 50Kg of patchouli, add 400L of water, distill, collect 40L of distillate, and distill under reduced pressure to obtain 10Kg of patchouli extract containing bambooene and patchouli alcohol, then add The cinnamon extract prepared in step (1), the clove extract prepared in step (2) and the lemon extract prepared in step (3) were stirred at a stirring speed of 60 rpm and a stirring time of 30 minutes to prepare The compound plant extract is obtained; the obtained compound plant extract is 200Kg, wherein trans-cinnamaldehyde is 15Kg, trans-o-methoxycinnamaldehyde 3Kg, isoeugenol 120Kg, limonene 5Kg, bamboo ene 1Kg, patchouli alcohol 0.3Kg.

Product effect test

1. Broad-spectrum antibacterial test

Take the composite plant extract, sodium dehydroacetate, potassium sorbate and sodium benzoate (sodium dehydroacetate, potassium sorbate and sodium benzoate are conventional antibacterial preservatives) obtained in Example 1-3, and test their minimum antibacterial properties. Concentration (MIC, unit: ppm), the results are shown in Table 1.

Table 1:

As can be seen from Table 1, the composite plant extract prepared in Example 1-3 of the present invention is effective against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Candida albicans, Aspergillus niger, Bacillus cereus The minimum inhibitory concentrations of Bacillus subtilis and sodium dehydroacetate, potassium sorbate and sodium benzoate are significantly lower than the minimum inhibitory concentrations of sodium dehydroacetate, potassium sorbate and sodium benzoate, indicating that the composite plant extract prepared in Examples 1-3 of the present invention has a good bacteriostatic effect .

2. Toxicity test

According to the standard GB15193.3-2014, the acute rat oral toxicity classification of the substances is carried out, as shown in Table 2. Table 3 shows the toxicity levels of the composite plant extract prepared in Example 2 of the present invention and common antibacterial preservatives.

Table 2:

level Rat oral median lethal dose (LD50)/(mg/Kg) acute poison <1 highly toxic 1-50 Moderately poisonous 51-500 low toxicity 501-5000 non-toxic >5000

table 3:

As can be seen from Table 2 and Table 3, the composite plant extract prepared in Example 2 of the present invention belongs to non-toxic substances, and it is safer to add to food.

3. Sensory evaluation

Take the compound plant extract prepared in Example 3, two commercially available common plant preservatives A and preservatives B (preservative A mainly contains Paeonia suffruticosa bark extract, Qin pepper extract, and preservative B mainly contains Anemarrhena chinensis extract. Organza officinalis extract, Magnolia officinalis extract), conduct sensory evaluation, evaluate the sensory score on smell and mouthfeel (taste), the full score is 5 points, the higher the score, the higher the acceptance and the stronger the sense of pleasure, the results are shown in Table 4 .

Table 4:

As can be seen from Table 4, the composite plant extract prepared in Example 3 of the present invention has a higher score than the commercially available two common plant preservatives A and B. It can be seen that the compound plant extract prepared in Example 3 of the present invention has a higher score The complex plant extracts have better sensory evaluation.

4. Antioxidant test

Take the composite plant extracts prepared in Examples 1-4 and commercially available common antioxidant substances, rosemary extract (the main component is carnosic acid), tea polyphenols, and tert-butyl hydroquinone, and test the antioxidant properties. performance. Antioxidant ability evaluation method: under the same concentration (50ppm), the free radical scavenging rate (%) was tested. The higher the scavenging rate, the stronger the antioxidant ability. The results are shown in Table 5.

table 5:

Antioxidant (50ppm) Free radical scavenging rate (%) Example 1 20.76 Example 2 21.08 Example 3 20.55 Example 4 22.04 Rosemary Extract (Carnosic Acid) 7.85 tea polyphenols 58.20 tert-butyl hydroquinone 40.05

It can be seen from Table 5 that the composite plant extracts prepared in Examples 1-4 of the present invention have certain antioxidant properties.

Example 5: Moisturizing essence containing the compound plant extract prepared by the present invention

According to 4 formulas, the moisturizing essences were prepared, namely moisturizing essence a, moisturizing essence b, moisturizing essence c and moisturizing essence d. The specific formulas of each group are shown in Table 6.

Table 6:

As can be seen from Table 6, the compound plant extract prepared by the present invention is added to the moisturizing essence, and its antiseptic effect is verified through the antiseptic challenge test. The anti-corrosion challenge method is to add a certain amount of microorganisms to the moisturizing essence to simulate the possible contamination in cosmetics, to detect the amount of viable bacteria at regular intervals, and to judge the effectiveness of the cosmetic anti-corrosion system based on the increase or decrease of the amount of viable bacteria. experimental method.

The specific steps are as follows:

(1) The samples (that is, the corresponding 4 kinds of moisturizing essences in Table 6) are packed into sterilization small boxes under aseptic environment, and are divided into two groups, respectively bacteria group and fungus group, in the sample small box After adding the bacterial liquid to the medium, mix well, the bacterial concentration in the bacterial group is 7logcfu/g (for example, 10 ⁷ cfu/g=7logcfu/g), and the fungal concentration in the fungal group is 4logcfu/g;

(2) Weigh 5 mL of the sample respectively, put it into a sterile diluent containing 45 mL, and mix to obtain 10 ^-1 (that is, the volume concentration of the sample is 10%) sample homogenate;

(3) Draw 1mL of ^10-1 sample homogenate, add 9mL of sterilized diluent to make ^10-2 sample homogenate, and carry out 10-fold incremental dilution to the appropriate concentration according to this method (for each incremental dilution, replace it once 1mL tip);

(4) Draw 1 mL of the sample homogenate into a sterile plate, pour the nutrient agar medium and Bengal tiger red medium cooled to 46°C into the plate, and rotate the plate to mix it evenly;

(5) When the agar in the plate is completely solidified, make a mark, put the plate upside down and put it into a constant temperature incubator, culture the bacteria at 37°C for 24-48h, and cultivate the fungus at 27°C for 5-7 days;

(6) Test once every 7 days, a total of 5 times for 28 days.

evaluation standard

The evaluation standard of the anti-corrosion challenge test is the standard in Table 7 below, and meeting this standard can be judged as passing the anti-corrosion challenge test.

Table 7: Standards

The results of the anti-corrosion challenge are shown in Table 8:

Table 8:

As can be seen from Table 8 (ND means not detected), the moisturizing essence contains the composite plant extracts prepared in Example 1 and Example 4 at a concentration of 0.06% to pass the preservative challenge, and the moisturizing essence contains benzene Oxyethanol needs to be added to 0.8% to pass the preservative challenge.

Example 6

The composite plant extracts prepared in Example 2 and Example 3 of the present invention were added to cooked kelp filaments, and the total number of colonies in the shelf life were tracked (the tracking results are shown in Table 10) to verify the composite extract prepared by the present invention. Bacteriostatic ability in food.

The components of the four kinds of kelp silk are shown in Table 9.

Table 9:

The production process of kelp silk is as follows:

(1) Hot blanching of kelp shreds: soak the kelp shreds in water for 5 minutes at 85°C;

(2) Seasoning: After blanching, remove the shredded kelp, drain for 15 minutes, add salt, white sugar, monosodium glutamate, white rice vinegar, chicken powder, sesame oil, chili oil in turn, stir well and let it stand for 15 minutes until the shredded kelp tastes good (The compound plant extracts prepared in Example 2 and Example 3 are added in step (2));

(3) Packaging: vacuum packaging in cooking bags, vacuum time 30 seconds, heat sealing time 2 seconds, cooling time 2 seconds;

(4) Sterilization process: normal pressure, constant temperature of 100°C, and water bath for 20 minutes.

Table 10: Tracking results of the total number of colonies during the shelf life of kelp silk (log cfu/g)

It can be seen from Table 10 (more than or equal to 4.5 that exceeds the standard, ND means not detected), it can be seen that the kelp silk added with the composite plant extracts prepared in Example 2 and Example 3 of the present invention can guarantee the microbial content within 6 weeks. It does not exceed the standard, and has a good anti-corrosion effect.

Claims (10)

1. A compound plant extract, characterized in that, comprising the following components: cinnamon extract, clove extract, lemon extract. 2 . The composite plant extract according to claim 1 , wherein the lemon extract contains limonene. 3 . 3 . The compound plant extract according to claim 1 , wherein the compound plant extract further comprises at least one of turmeric extract, orange peel extract or star anise extract. 4 . 4 . The composite plant extract according to claim 1 , wherein the composite plant extract also contains limonene, bamboo ene, patchouli alcohol, baicalin, tanshinone, catechin, honokiol, incense At least one of apisol, thymol, myrcene, beta-pinene, or carnosic acid. 5. compound plant extract according to claim 1, is characterized in that, described compound plant extract, its active ingredient, by weight, comprises trans-cinnamaldehyde 3-40 parts, trans-o-methoxyl 0.1-5 parts of base cinnamaldehyde, 3-90 parts of isoeugenol, 0.1-10 parts of limonene. 6. the preparation method of the composite plant extract described in any one of claim 1-5, is characterized in that, comprises the following steps: (1) Preparation of cinnamon extract: take cinnamon bark, add water, heat, condense and reflux with steam, collect reflux liquid, conduct distillation again, collect distillate, add organic solvent for extraction, and then heat to remove organic solvent to obtain cinnamon extract thing; (2) preparation of clove extract: take clove, add water, distill, collect distillate, add organic solvent for extraction, fractional distillation under reduced pressure, remove organic solvent, and obtain clove extract; (3) Preparation of lemon extract: take lemon, and obtain lemon extract by cold pressing or distillation; then add the cinnamon extract prepared in step (1) and the clove extract prepared in step (2), stir, The composite plant extract was prepared. 7. preparation method according to claim 6, is characterized in that, in the stirring process in step (3), also add turmeric extract, orange peel extract, star anise extract, limonene, bamboo ene, patchouli alcohol, scutellaria baicalensis at least one of glycosides, tanshinones, catechins, honokiol, carvacrol, thymol, myrcene, beta-pinene or carnosic acid. 8. A daily chemical product, characterized in that the daily chemical product contains the composite plant extract according to any one of claims 1-5. 9. A food, characterized in that the food contains the composite plant extract according to any one of claims 1-5. 10 . The food according to claim 9 , wherein the content of the compound plant extract is 0.04-0.15% by mass fraction. 11 .