Fragrance paper sheet and preparation method thereof

Abstract

The invention discloses an aromatherapy paper sheet and a preparation method thereof, and belongs to the technical field of paper sheet processing. A preparation method of the aromatherapy layer comprises the following steps: mixing cyclodextrin, coordination metal ions and deionized water, filtering, collecting filtrate, mixing with methanol, carrying out sealed heat treatment, and adding 8-hydroxyquinoline aluminum and hexadecyl trimethyl ammonium bromide to prepare a carrier; mixing the carrier, citric acid, monopotassium phosphate and absolute ethyl alcohol, performing ultrasonic dispersion, heating and stirring in a water bath, and performing heat treatment to prepare a cross-linked carrier; loading functional essential oil on the cross-linked carrier, and carrying out dispersion treatment to prepare an essential oil inclusion compound; taking cottonseed wool and starch glue, mixing, stirring in a water bath, adding the essential oil clathrate compound, continuously stirring, and curing the stirred mixture to obtain the aromatherapy layer; and the functional essential oil is coated to prevent permeation into the gummed paper layer, so that the anti-permeation effect of the prepared aromatherapy paper sheet is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of paper sheet processing, and particularly relates to an aromatherapy paper sheet and a preparation method thereof. Background Art

[0002] An aromatherapy paper sheet is a sheet-like article that can release fragrance. The use of aromatherapy paper sheets is very flexible and diverse. Different usage methods can be selected according to personal needs and scenarios. For example, the aromatherapy paper sheet can be clipped at the air outlet of the car air conditioner. When the air conditioner is turned on, it can effectively purify the air inside the car and bring a comfortable driving experience. It can also be placed on the workbench, desk or living room, etc., to improve the air environment with its fragrance, enhance work efficiency or add a sense of comfort at home. When outdoors, the aromatherapy paper sheet can be carried and placed in the pocket or bag to enjoy the fresh fragrance at any time. Before going to bed, placing the aromatherapy paper sheet beside the pillow has a sleep-aiding effect. Placing the aromatherapy paper sheet in the wardrobe can prevent clothes from breeding mites and having peculiar smells, and keep the clothes fresh, etc. The different effects of aromatherapy paper sheets depend on the different compositions of the fragrance components in the aromatherapy.

[0003] After retrieval, the patent document with the application number CN202120894973.X discloses an aromatherapy paper sheet, in which the aromatherapy layer is located between the first paper layer and the second paper layer, thus forming a sandwich structure. The first paper layer and the second paper layer are provided with ventilation holes, so that the fragrance of the aromatherapy layer can diffuse out through the ventilation holes, making the paper sheet fragrant. For the traditional processing technology of aromatherapy paper sheets, double-sided adhesive paper is often used to form the first paper layer and the second paper layer, so that more printing processes can be applied on the surface of the double-sided adhesive paper or more diversified effects can be obtained through processing, and it can be applied to different products. For the aromatherapy layer, absorbent paper is often used to be made by dripping fragrance or soaking in fragrance, but it will cause the surface to remain with essence liquid, which penetrates through the ventilation holes to the first paper layer and the second paper layer on the surface, resulting in a greasy surface. It is easy to stick to the user's hands and affects the product experience. If each layer is first laminated and then soaked in fragrance or dripped with fragrance, it will cause the lamination tightness of each layer to be poor and easy to delaminate and separate. Therefore, how to effectively improve the penetration problem and stability of the fragrance essential oil in the aromatherapy paper sheet has become the key to improving product quality and user experience. Summary of the Invention

[0004] The purpose of the present invention is to provide an aromatherapy paper sheet and a preparation method thereof, which are used to solve the problems of essential oil penetration and destruction of the stability of the layer structure of the aromatherapy paper sheet.

[0005] The purpose of the present invention can be achieved by the following technical solutions: A preparation method of an aromatherapy paper sheet, taking a first double-sided adhesive paper layer, an aromatherapy layer and a second double-sided adhesive paper layer and laminating them in sequence, pressing and curing, and cutting, then the aromatherapy paper sheet is obtained; The preparation method of the aromatherapy layer comprises the following steps: S1. Mix cyclodextrin, coordinated metal ions, and deionized water, filter, and collect the filtrate; S2. Take the filtrate and methanol, seal and heat-treat, add aluminum 8-hydroxyquinoline and cetyltrimethylammonium bromide, stir evenly, leave at room temperature, perform centrifugal separation, take the solid phase, wash, and dry in vacuum to obtain a carrier; S3. Take the carrier, citric acid, potassium dihydrogen phosphate, and absolute ethanol, disperse by ultrasonic wave, heat and stir in a water bath, then heat at 135 - 145 °C for 4 - 6 h, cool, take the product, wash, and dry in vacuum to obtain a crosslinked carrier; S4. Take the crosslinked carrier and absolute ethanol, add functional essential oil, perform dispersion treatment, perform centrifugal separation, and take the solid phase to obtain an essential oil inclusion compound; S5. Take cottonseed fluff and starch glue, stir in a water bath, add the essential oil inclusion compound and continue to stir, and solidify the stirred mixture to obtain the aromatherapy layer.

[0006] As a preferred technical solution of the present invention, in step S1, the molar ratio of the cyclodextrin to the coordinated metal ions is 1 - 2:10 - 12.

[0007] As a preferred technical solution of the present invention, in step S2, the dosage ratio of the filtrate, methanol, aluminum 8-hydroxyquinoline, and cetyltrimethylammonium bromide is 40 - 60 mL:80 mL:0.8 - 1.2 mg:0.2 - 0.3 mg.

[0008] As a preferred technical solution of the present invention, in step S3, the dosage ratio of the carrier, citric acid, potassium dihydrogen phosphate, and absolute ethanol is 15 - 18 mg:15 - 18 mg:0.7 - 0.9 mg:50 - 60 mL.

[0009] As a preferred technical solution of the present invention, in step S4, the dosage ratio of the crosslinked carrier, absolute ethanol, and functional essential oil is 3 - 4 mg:20 mL:2 - 2.5 mL.

[0010] As a preferred technical solution of the present invention, in step S5, the dosage ratio of the cottonseed fluff, starch glue, and essential oil inclusion compound is 1 - 2 mg:20 - 30 mL:2.5 - 3.5 mg.

[0011] As a preferred technical solution of the present invention, the coordinated metal ions include any one of sodium ions, potassium ions, or ferrous ions.

[0012] As a preferred technical solution of the present invention, the coordinated metal ions are preferably sodium ions.

[0013] As a preferred technical solution of the present invention, the functional essential oil includes any one or a combination of at least two of lavender essential oil, lemon essential oil, sweet orange essential oil, jasmine essential oil, chamomile essential oil, tea tree essential oil, eucalyptus essential oil, rosemary essential oil, and rose essential oil.

[0014] As a preferred technical solution of the present invention, the cyclodextrin includes any one of α-cyclodextrin, β-cyclodextrin, or γ-cyclodextrin.

[0015] As a preferred technical solution of the present invention, the cyclodextrin is preferably γ-cyclodextrin.

[0016] An aromatherapy paper sheet prepared by using the above-mentioned preparation method.

[0017] Advantages of the present invention: An aromatherapy paper sheet and a preparation method thereof disclosed by the present invention prepare a cyclodextrin organic framework, then introduce crosslinking sites, and perform further crosslinking and sealing treatment to obtain a crosslinked carrier with a pore structure coated with a functional essential oil. On the one hand, it prolongs the penetration path of the essential oil, prevents the essential oil from penetrating to the surface of the paper sheet to contaminate the paper sheet, and prevents the separation of the paper sheet layer structure caused by oil seepage, thereby improving the structural stability; on the other hand, by coating the essential oil, a slow-release effect is achieved, and the fragrance persistence of the aromatherapy paper sheet is improved.

[0018] Furthermore, by adding cottonseed fluff to the starch glue and blending it with the essential oil inclusion compound, when the essential oil penetrates, the abundant short fibers on the surface of the cottonseed fluff have a physical adsorption effect on the essential oil, and quickly absorb the exudate through capillary action, further preventing the essential oil from penetrating to the surface of the paper sheet to form oil spots; moreover, after the cottonseed fluff adsorbs the essential oil, this adsorption effect can temporarily fix the essential oil, achieving a slow-release effect and improving the fragrance persistence of the aromatherapy paper sheet. Description of the drawings

[0019] The following further describes the present invention with reference to the drawings.

[0020] Figure 1 is an aromatherapy paper sheet prepared by an aromatherapy paper sheet and a preparation method thereof proposed by the present invention 对比例1 and an aromatherapy paper sheet 对比例2 is a gas chromatogram of the surface of the aromatherapy paper sheet permeated with essential oil. Specific embodiments

[0021] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with embodiments, details the specific embodiments, structures, features, and their effects according to the present invention.

[0022] This application provides an aromatherapy paper sheet. Take double-sided offset paper as the bottom layer and lay it flat, brush on the aromatherapy sizing material, then take another double-sided offset paper and stick it on the aromatherapy sizing material, press and cure it, cut and trim the edges, and the aromatherapy paper sheet is obtained. Among them, the double-sided offset paper of the bottom layer serves as the second double-sided offset paper layer, on which the aromatherapy sizing material is brushed, and then another double-sided offset paper is pasted as the first double-sided offset paper layer. After the aromatherapy sizing material is cured, it serves as the aromatherapy layer. The brushing thickness of the aromatherapy sizing material is 50 - 100 μm.

[0023] The curing method can be natural curing for 6 - 8 h or drying at 40 °C for 30 - 40 min, and the pressure during pressing is 0.6 - 1 MPa.

[0024] Example 1 A preparation method of an aromatherapy sizing material includes the following steps: S1. Take 12.91 mg of γ-cyclodextrin, 32.44 mg of potassium citrate, and 150 mL of deionized water, mix them, ultrasonically disperse for 10 min, filter, and collect the filtrate. S2. Take 40 mL of the filtrate and 80 mL of methanol, mix them, place them in a sealed container, heat in a water bath at 45 °C for 3 h, add 0.8 mg of tris(8-hydroxyquinoline)aluminum and 0.2 mg of cetyltrimethylammonium bromide, stir for 5 h, let stand at room temperature for 12 h, centrifuge and separate, take the solid phase, wash it, and dry it under vacuum to obtain the carrier. S3. Take 15 mg of the carrier, 15 mg of citric acid, 0.7 mg of potassium dihydrogen phosphate, and 50 mL of absolute ethanol, mix them, ultrasonically disperse for 10 min, heat and stir in a water bath at 70 °C for 4 h, then heat at 135 °C for 4 h, cool, take the product, wash it, and dry it under vacuum to obtain the crosslinked carrier. S4. Take 3 mg of the crosslinked carrier and 20 mL of absolute ethanol, mix and stir for 5 min, add 2 mL of lavender essential oil (purchased from Hubei Zhonglong Kangsheng Fine Chemical Co., Ltd.), ultrasonically treat at 60 °C for 8 min, centrifuge and separate, take the solid phase to obtain the essential oil inclusion compound. S5. Take 1 mg of cotton linter and 20 mL of starch glue, stir at 45 °C for 15 min, add 2.5 mg of the essential oil inclusion compound and continue to stir for 3 min to obtain the aromatherapy sizing material. The preparation method of the starch glue includes the following steps: Take 50 g of oxidized corn starch (purchased from Wuhan Jixin Yibang Biotechnology Co., Ltd.), 150 mL of deionized water, 10 mL of glycerol, and 1.5 g of stearic acid, blend them, stir at 65 °C for 30 min, cool to 45 °C, add 200 mL of a 5% sodium alginate aqueous solution, and continue to stir for 20 min to obtain the starch glue.

[0025] Example 2 A preparation method of an aromatherapy sizing material includes the following steps: S1. Mix 19.45 mg of γ-cyclodextrin, 35.67 mg of potassium citrate, and 180 mL of deionized water, ultrasonically disperse for 10 min, filter, and collect the filtrate; S2. Take 50 mL of the filtrate and 80 mL of methanol, mix them, place them in a sealed container, heat in a water bath at 50 °C for 5 h, add 1 mg of aluminum 8-hydroxyquinoline and 0.25 mg of cetyltrimethylammonium bromide, stir for 7 h, let stand at room temperature for 18 h, centrifuge, take the solid phase, wash it, and dry it under vacuum to obtain the carrier; S3. Take 16 mg of the carrier, 16 mg of citric acid, 0.8 mg of potassium dihydrogen phosphate, and 55 mL of absolute ethanol, mix them, ultrasonically disperse for 12 min, heat and stir in a water bath at 70 °C for 5 h, then heat at 140 °C for 5 h, cool, take the product, wash it, and dry it under vacuum to obtain the crosslinked carrier; S4. Take 3.5 mg of the crosslinked carrier and 20 mL of absolute ethanol, mix and stir for 5 min, add 2.2 mL of eucalyptus essential oil (purchased from Guangdong Wengjiang Chemical Reagent Co., Ltd.), ultrasonically treat at 60 °C for 12 min, centrifuge, and take the solid phase to obtain the essential oil inclusion compound; S5. Take 1.5 mg of cotton linter and 25 mL of starch glue, stir at 50 °C for 20 min, add 3 mg of the essential oil inclusion compound and continue to stir for 4 min to obtain the aromatherapy glue material; The preparation method of the starch glue includes the following steps: Take 50 g of oxidized corn starch, 150 mL of deionized water, 10 mL of glycerol, and 1.5 g of stearic acid, mix them, stir at 65 °C for 30 min, cool to 45 °C, add 200 mL of a 5% aqueous sodium alginate solution, and continue to stir for 20 min to obtain the starch glue.

[0026] Example 3 A preparation method of an aromatherapy glue material includes the following steps: S1. Mix 25.94 mg of γ-cyclodextrin, 38.92 mg of potassium citrate, and 200 mL of deionized water, ultrasonically disperse for 10 min, filter, and collect the filtrate; S2. Take 60 mL of the filtrate and 80 mL of methanol, mix them, place them in a sealed container, heat in a water bath at 55 °C for 5 h, add 1.2 mg of aluminum 8-hydroxyquinoline and 0.3 mg of cetyltrimethylammonium bromide, stir for 8 h, let stand at room temperature for 24 h, centrifuge, take the solid phase, wash it, and dry it under vacuum to obtain the carrier; S3. Take 18 mg of the carrier, 18 mg of citric acid, 0.9 mg of potassium dihydrogen phosphate, and 60 mL of absolute ethanol, mix them, ultrasonically disperse for 15 min, heat and stir in a water bath at 70 °C for 6 h, then heat at 145 °C for 6 h, cool, take the product, wash it, and dry it under vacuum to obtain the crosslinked carrier; S4. Take 4 mg of the crosslinked carrier, mix and stir it with 20 mL of absolute ethanol for 5 min, add 2.5 mL of chamomile essential oil (purchased from Jiangxi Jingwang Natural Flavors Co., Ltd.), perform ultrasonic treatment at 60 °C for 15 min, carry out centrifugal separation, and take the solid phase to obtain the essential oil inclusion compound; S5. Take 2 mg of cotton linter, mix it with 30 mL of starch glue, stir at 55 °C for 25 min, add 3.5 mg of the essential oil inclusion compound and continue stirring for 5 min to obtain the aromatherapy glue material; The preparation method of the starch glue includes the following steps: Take 50 g of oxidized corn starch, 150 mL of deionized water, 10 mL of glycerol, and 1.5 g of stearic acid, mix them, stir at 65 °C for 30 min, cool to 45 °C, add 200 mL of an aqueous sodium alginate solution with a mass fraction of 5%, and continue stirring for 20 min to obtain the starch glue.

[0027] Example 4 A preparation method of an aromatherapy glue material includes the following steps: S1. Take 19.45 mg of β-cyclodextrin, 36.95 mg of sodium citrate, and 180 mL of deionized water, mix them, perform ultrasonic dispersion for 10 min, filter, and collect the filtrate; S2. Take 50 mL of the filtrate, mix it with 80 mL of methanol, place it in a sealed container, heat it in a water bath at 50 °C for 5 h, add 1 mg of tris(8-hydroxyquinoline)aluminum and 0.25 mg of cetyltrimethylammonium bromide, stir for 7 h, let it stand at room temperature for 18 h, carry out centrifugal separation, take the solid phase for washing, and perform vacuum drying to obtain the carrier; S3. Take 16 mg of the carrier, 16 mg of citric acid, 0.8 mg of potassium dihydrogen phosphate, and 55 mL of absolute ethanol, mix them, perform ultrasonic dispersion for 12 min, heat and stir in a water bath at 70 °C for 5 h, then heat at 140 °C for 5 h, cool, take the product for washing, and perform vacuum drying to obtain the crosslinked carrier; S4. Take 3.5 mg of the crosslinked carrier, mix and stir it with 20 mL of absolute ethanol for 5 min, add 1.2 mL of sweet orange essential oil (purchased from Ji'an Huatianbao Chinese Herbal Medicine Bioproducts Factory) and 1 mL of jasmine essential oil (purchased from Guangdong Yunxing Biotechnology Co., Ltd.), perform ultrasonic treatment at 60 °C for 12 min, carry out centrifugal separation, and take the solid phase to obtain the essential oil inclusion compound; S5. Take 1.5 mg of cotton linter, mix it with 25 mL of starch glue, stir at 50 °C for 20 min, add 3 mg of the essential oil inclusion compound and continue stirring for 4 min to obtain the aromatherapy glue material; The preparation method of the starch glue includes the following steps: Take 50 g of oxidized corn starch, 150 mL of deionized water, 10 mL of glycerol, and 1.5 g of stearic acid and mix them. Stir at 65 °C for 30 min, cool to 45 °C, add 200 mL of an aqueous sodium alginate solution with a mass fraction of 5%, and continue stirring for 20 min to obtain the starch glue.

[0028] Comparative Example 1 The difference from Example 2 is that cotton linter is not added in step S5 during the preparation of the aromatherapy glue, and the rest of the operation steps remain unchanged.

[0029] Comparative Example 2 The difference from Example 2 is that the preparation method of the aromatherapy glue includes the following steps: Take 1.5 mg of cotton linter and 25 mL of starch glue and mix them. Stir at 50 °C for 20 min, add 2.2 mL of eucalyptus essential oil, and continue stirring for 4 min to obtain the aromatherapy glue.

[0030] Comparative Example 3 The difference from Example 2 is that the preparation method of the aromatherapy glue includes the following steps: S1. Take 19.45 mg of γ-cyclodextrin, 35.67 mg of potassium citrate, and 180 mL of deionized water and mix them. Ultrasonically disperse for 10 min, filter, and collect the filtrate; S2. Take 50 mL of the filtrate and 80 mL of methanol and mix them. Place them in a sealed container and heat in a water bath at 50 °C for 5 h. Add 0.25 mg of cetyltrimethylammonium bromide, stir for 7 h, let stand at room temperature for 18 h, centrifuge, take the solid phase for washing, and vacuum dry to obtain the carrier; S3. Take 3.5 mg of the carrier and 20 mL of absolute ethanol and mix and stir for 5 min. Add 2.2 mL of eucalyptus essential oil, ultrasonically treat at 60 °C for 12 min, centrifuge, and take the solid phase to obtain the essential oil inclusion compound; S4. Take 1.5 mg of cotton linter and 25 mL of starch glue and mix them. Stir at 50 °C for 20 min, add 3 mg of the essential oil inclusion compound and continue stirring for 4 min to obtain the aromatherapy glue.

[0031] Performance Test Take the aromatherapy glue prepared in Examples 1-4 and Comparative Examples 1-3 respectively and apply it to the surface of the second double-sided adhesive paper layer, then lay the first double-sided adhesive paper layer on it, apply a pressure of 0.6 MPa for pressing and heat-dry and cure at 40 °C for 30 min, cut and trim the edges to obtain the aromatherapy paper sheets 实施例1 , aromatherapy paper sheets 实施例2 , aromatherapy paper sheets 实施例3 , aromatherapy paper sheets 实施例4 , aromatherapy paper sheets 对比例1 , aromatherapy paper sheets 对比例2 , aromatherapy paper sheets 对比例3 .

[0032] Test Example 1 Sensory Test: Take the scented paper 实施例1 , scented paper 实施例2 , scented paper 实施例3 , scented paper 实施例4 , scented paper 对比例1 , scented paper 对比例2 , scented paper 对比例3 , and place them statically in a natural environment at 25°C and a relative humidity of (25±4)%, and evaluate the fragrance persistence, oil leakage situation and paper stability. The evaluation results are shown in Table 1 below.

[0033] Table 1 As can be seen from Table 1, the scented gum stock prepared in Examples 1-3 of the present application used as the scented layer for scented paper has good anti-permeability and structural stability, and has a slow-release effect. In Comparative Example 1, cottonseed floss was not added, and the barrier property of the scented layer of the prepared scented paper became worse. On the one hand, the slow-release effect was reduced, and essential oil leakage would also occur, affecting the structural stability of the scented paper; in Comparative Example 2, the essential oil was not coated by a cross-linked carrier with an embedding function, resulting in a large amount of essential oil leakage and causing layer separation of the scented paper; in Comparative Example 3, the carrier was not cross-linked, and the coated essential oil also leaked out, contaminating the paper.

[0034] Test Example 2 Take the scented paper after standing for 7 days in Test Example 1 对比例1 , scented paper 对比例2 , peel off the adhesive layer of the scented paper 对比例2 , scented paper 对比例3 , rinse with anhydrous ethanol, collect the oil liquid for gas chromatography analysis, and the analysis results are as Figure 1 shown, Figure 1 where a in 对比例1 is the gas chromatogram of the scented paper Figure 1 and b in 对比例2 is the gas chromatogram of the scented paper. Gas chromatography-mass spectrometry was used to confirm that the main component of the surface oil stain is eucalyptol, which is the main component of eucalyptus essential oil, indicating that there is essential oil penetration in the scented paper of Comparative Example 1 and Comparative Example 2, resulting in a decrease in the fragrance persistence and structural stability of the prepared paper.

[0035] The above has described some embodiments of the present invention in detail, but the described content is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A preparation method of an aromatherapy paper sheet, characterized in that, Stack the first double-sided adhesive paper layer, the aromatherapy layer, and the second double-sided adhesive paper layer in sequence, press and cure, and cut to obtain the aromatherapy paper sheet; The preparation method of the aromatherapy layer includes the following steps: S1. Mix cyclodextrin, coordinated metal ions, and deionized water, filter, and collect the filtrate; S2. Take the filtrate and methanol, perform sealed heat treatment, add aluminum 8-hydroxyquinoline and cetyltrimethylammonium bromide, stir evenly, place at room temperature, perform centrifugal separation, take the solid phase for washing, and vacuum dry to obtain a carrier; S3. Take the carrier, citric acid, potassium dihydrogen phosphate, and absolute ethanol, ultrasonically disperse, heat and stir in a water bath, then heat at 135 - 145 °C for 4 - 6 h, cool, take the product for washing, and vacuum dry to obtain a crosslinked carrier; S4. Take the crosslinked carrier and absolute ethanol, add functional essential oil, perform dispersion treatment, perform centrifugal separation, and take the solid phase to obtain an essential oil inclusion compound; S5. Take cottonseed fluff and starch glue, stir in a water bath, add the essential oil inclusion compound and continue to stir, and cure the stirred mixture to obtain the aromatherapy layer.

2. The preparation method of an aromatherapy paper sheet according to claim 1, wherein In step S1, the molar ratio of the cyclodextrin to the coordinated metal ions is 1 - 2:10 - 12.

3. The preparation method of an aromatherapy paper sheet according to claim 1, characterized in that, In step S2, the dosage ratio of the filtrate, methanol, aluminum 8-hydroxyquinoline, and cetyltrimethylammonium bromide is 40 - 60 mL:80 mL:0.8 - 1.2 mg:0.2 - 0.3 mg.

4. The preparation method of an aromatherapy paper sheet according to claim 1, characterized in that, In step S3, the dosage ratio of the carrier, citric acid, potassium dihydrogen phosphate, and absolute ethanol is 15 - 18 mg:15 - 18 mg:0.7 - 0.9 mg:50 - 60 mL.

5. The preparation method of an aromatherapy paper sheet according to claim 1, characterized in that, In step S4, the dosage ratio of the crosslinked carrier, absolute ethanol, and functional essential oil is 3 - 4 mg:20 mL:2 - 2.5 mL.

6. The preparation method of an aromatherapy paper sheet according to claim 1, characterized in that, In step S5, the dosage ratio of the cottonseed fluff, starch glue, and essential oil inclusion compound is 1 - 2 mg:20 - 30 mL:2.5 - 3.5 mg.

7. The preparation method of an aromatherapy paper sheet according to claim 1, characterized in that The functional essential oil includes any one or a combination of at least two of lavender essential oil, lemon essential oil, sweet orange essential oil, jasmine essential oil, chamomile essential oil, tea tree essential oil, eucalyptus essential oil, rosemary essential oil, and rose essential oil.

8. The preparation method of an aromatherapy paper sheet according to claim 1, characterized in that, The cyclodextrin includes any one of α-cyclodextrin, β-cyclodextrin, or γ-cyclodextrin.

9. The preparation method of an aromatherapy paper sheet according to claim 1, characterized in that, The coordinated metal ions include any one of sodium ions, potassium ions, or ferrous ions.

10. An aromatherapy paper sheet prepared by the preparation method according to any one of claims 1 - 9.

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