Preparation method of agilawood decorative material with health-care effect

Abstract

The invention discloses a preparation method of an agilawood decorative material with health-care efficacy, which is characterized in that natural agilawood and an agilawood essence microcapsule are used as a fragrance emitting core, a porous biomass material, a natural plant pigment and formaldehyde-free reactive flexible polymer resin are compounded, and after compression molding at room temperature, the material is processed into a thin product, the agilawood essence microcapsule takes agilawood essential oil obtained by steam distillation or agilawood essential oil refined by COsupercritical extraction and molecular distillation as a raw material, so that the aroma durability can be enhanced; the porous material and the flexible resin synergistically improve the adsorption anchoring effect and the flexibility of the material, and the product has agilawood characteristic fragrance, the indoor fragrance release time is longer than 3 years, the flexibility is excellent, the adhesive strength is high, no formaldehyde is released, and the product can be directly fixed to a wall surface, a wardrobe, a bedside and other scenes, has a decoration function and a health-care effect of calming the mind and tranquilizing the mind and is suitable for popularization and application. The technical problems that a traditional agilawood product is limited in application, and an existing fragrance releasing material is weak in fragrance and poor in flexibility are solved.

Description

Technical Field

[0001] A method for preparing agarwood decorative materials with health and wellness benefits. This invention belongs to the field of functional composite materials technology. Specifically, it is a method for preparing agarwood decorative materials with long-lasting fragrance release, calming and soothing effects by room temperature molding using natural agarwood and agarwood fragrance microcapsules as fragrance-generating substances, adding porous biomass materials, natural plant pigments and reactive flexible polymer resins. Background Technology

[0002] Agarwood is a precious traditional aromatic medicinal herb. At room temperature, it releases a large amount of volatile aromatic active ingredients, giving it a rich and lasting fragrance with coolness and sweetness. It also has calming, soothing, sleep-aiding, and air-purifying effects. In recent years, with the fast pace of life, stress, anxiety, and insomnia have become increasingly serious, leading to a strong demand for agarwood-based health products with wellness benefits. Although agarwood is widely loved, it is typically small and irregular in size, and has long been limited to everyday applications such as beads, incense, and perfumes. Breaking through the traditional applications of agarwood and combining it with household products closely related to daily life can greatly satisfy people's urgent needs for health and a better life.

[0003] To further expand the application range of agarwood, agarwood and its extracts are currently being used in the development of fragrance-releasing engineered wood panels and coatings for indoor furniture. For example, CN202411304876 discloses a process for producing fragrance-releasing particleboard using agarwood extraction residue, expanding the application of agarwood in furniture engineered wood panels. However, after extracting essential oils from agarwood, the residue has a weak aroma. Further hot-pressing at 160-200℃ will accelerate the release of aroma, resulting in particleboard products with weak fragrance release performance. Moreover, the surface and core layers of the products have different morphologies, high density, and high hardness, making further cutting into homogeneous thin materials for processing and utilization impossible. CN120554898A discloses a coating material containing agarwood components. This coating is mainly composed of agarwood powder, Sichuan pepper powder, and natural glutinous rice glue, and can be sprayed or brushed onto the surfaces of walls, furniture, and handicrafts. This method uses agarwood powder rich in oily resin as a raw material, producing a coating with a rich aroma. However, this method lacks an interwoven network structure, and the coating formed by glutinous rice glue is hard, brittle, and has low flexibility, making it easily damaged. In addition, it requires on-site spraying or brushing, which is inconvenient and requires high technical skills from workers. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a method for preparing agarwood decorative materials with health and wellness benefits. This solves the problem that it is difficult to prepare large-scale decorative materials with both excellent bonding properties and long-lasting aroma release properties from oil-rich agarwood raw materials, and that the materials can be further processed into thin agarwood decorative materials by sawing, splitting or rotary cutting.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for preparing an agarwood decorative material with health and wellness benefits includes the following steps:

[0007] 1) Mix powdered, fibrous or shaving agarwood raw materials, porous biomass materials, and natural plant pigments evenly, then add agarwood fragrance microcapsules and reactive flexible polymer resin and stir evenly to obtain a pretreated blend.

[0008] 2) The pretreated blend is laid in a mold and cold-pressed at room temperature with a pressure of 1.5 MPa for 24 h, and the density is controlled to be 0.2-0.6 g / cm³ to obtain flexible agarwood decorative material.

[0009] 3) The agarwood essence microcapsules are processed into thin decorative materials by sawing, planing or rotary cutting processes; the agarwood essence microcapsules are prepared from agarwood essential oil obtained by steam distillation or agarwood essential oil refined by supercritical CO2 extraction and molecular distillation.

[0010] As a preferred embodiment of the present invention, the porous biomass material is selected from at least one of balsa wood, cork, diatomaceous earth, and paulownia.

[0011] As a preferred embodiment of the present invention, the reactive flexible polymer resin is selected from at least one of waterborne polyurethane, pMDI, and polyvinyl acetate adhesive, and contains no formaldehyde.

[0012] As a preferred technical solution of the present invention, the preparation of the agarwood fragrance microcapsules includes: dispersing agarwood essential oil at high speed in an emulsifier aqueous solution to form an emulsion, mixing it with a microcapsule wall material solution, heating and stirring at 50-70℃ and 800-1000rpm, adjusting the pH to 3-4 with a catalyst, and then washing, separating and drying to obtain the product.

[0013] As a preferred embodiment of the present invention, the emulsifier is selected from at least one of sodium lignosulfonate, cellulose nanocrystals, polyvinyl alcohol, sodium alginate, and gum arabic, and the mass ratio of the emulsifier to agarwood essential oil is 1:15-20.

[0014] As a preferred embodiment of the present invention, the microcapsule wall material is selected from at least one of chitosan, β-cyclodextrin, carboxymethyl cellulose, and zein, and the wall material solution concentration is 0.5-2%.

[0015] As a preferred embodiment of the present invention, the microcapsule dispersion contains 5-10% agarwood essential oil by mass, 30-50% microcapsule wall material emulsion by mass, and 50-70% water by mass, and the mass ratio of agarwood essential oil to wall material is 2:1.

[0016] As a preferred technical solution of the present invention, the indoor fragrance release time is ≥3 years, the characteristic aroma of agarwood can still be detected after heating at 100℃ for 6 hours, the density is 0.2-0.6 g / cm³, the flexibility is good and there is no formaldehyde release.

[0017] The released agarwood characteristic aroma components are mainly sesquiterpenes.

[0018] As a preferred technical solution of the present invention, the application of agarwood fragrance microcapsules in wood-based decorative materials.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] (1) Long-lasting and rich aroma: By combining agarwood raw materials with agarwood fragrance microcapsules and the interweaving anchoring effect of porous materials, the aroma is released slowly and for more than 3 years indoors. After heating at 100℃ for 6 hours, the characteristic aroma components of agarwood (mainly sesquiterpenes, including curcumene, agaric spirol, dihydroagaric furan, and santalinol, which are common aroma compounds in agarwood decorative materials) can still be detected.

[0021] (2) Excellent flexibility and processability: The reinforcing and toughening effect of porous materials and the interfacial bonding effect of flexible polymer resin make the material have excellent tensile strength and compression resilience, which can be easily processed into thin materials and are suitable for installation in various scenarios such as walls, wardrobes, and bedside tables.

[0022] (3) Green and environmentally friendly: The product uses formaldehyde-free flexible polymer resin and porous biomass material that does not contain harmful chemical components, so there is no risk of formaldehyde release.

[0023] (4) Stable structure: Through adsorption anchoring and cross-linking interpenetration, the material has high adhesive strength, good water resistance and long service life. Attached Figure Description

[0024] Figure 1 This is the SPME-GC-MS TIC diagram of the agarwood decorative material of the present invention; Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1 The present invention provides a technical solution:

[0027] A method for preparing agarwood decorative materials with health and wellness benefits includes:

[0028] 1. Composition of Agarwood Decorative Materials

[0029] This decorative material is composed of agarwood raw materials, agarwood essence microcapsules, porous biomass materials, flexible polymer resin, and natural plant pigments.

[0030] Agarwood raw material: The agarwood is Qinan agarwood, with an oil content of less than 10%. It is processed to 50-80 mesh using airflow crushing technology, and is in powder or shaving form with a moisture content of less than 1%.

[0031] Agarwood essential oil: extraction pressure and separation pressure are 25 MPa and 6 MPa, extraction temperature and separation temperature are 45 ℃ and 35 ℃, respectively; molecular distillation temperature is 85 ℃, and system vacuum degree is less than 0.1 MPa;

[0032] Porous biomass materials: balsa wood, cork, diatomaceous earth, paulownia, etc., with a particle size of 2-3 mm; reactive flexible polymer resins: waterborne polyurethane, solid content 35±2%, pH value 7.5-8.5; pMDI, NCO content 30-32%; polyvinyl acetate resin, solid content 40-55%;

[0033] Natural plant pigments: pigments derived from natural plants such as flowers, stems, leaves, and colored wood powder, selected from at least one of the colored extracts from chrysanthemum, maple leaves, and gardenia.

[0034] 2. Preparation of Agarwood Fragrance Microcapsules

[0035] (1) Add 4g of agarwood essential oil refined by supercritical CO2 extraction and molecular distillation to 40g of emulsifier aqueous solution. Mix the essential oil and emulsifier at a mass ratio of 1:20 and disperse at high speed of 10000rpm for 5-10min to form an agarwood essential oil emulsion. The emulsifier is selected from at least one of sodium lignosulfonate, cellulose nanocrystals, polyvinyl alcohol, sodium alginate, and gum arabic.

[0036] (2) Dissolve the microcapsule wall material in water, stir at 300-500 rpm for 0.5-1 h, and heat at 40-50 degrees Celsius to form a microcapsule wall material solution with a concentration of 0.5-2%; the wall material is selected from at least one of chitosan, β-cyclodextrin, carboxymethyl cellulose, and zein.

[0037] (3) The microcapsule wall material solution is slowly added to the agarwood essential oil emulsion to form a mixed system. The dropping rate is 1-5 ml / min. The agarwood essential oil has a mass fraction of 5-10%, the microcapsule wall material emulsion has a mass fraction of 30-50%, and the water has a mass fraction of 50-70%. The mass ratio of agarwood essential oil to wall material is 2:1. The mixture is heated and stirred at 50-70℃ and 800-1000 rpm. At least one catalyst of 10-20% concentration of citric acid, acetic acid or malic acid is added to adjust the pH to 3-4 to form a microcapsule dispersion.

[0038] (4) After washing and separating the microcapsule dispersion with water and ethanol multiple times, dry it at 40-60℃ for 6-12h to obtain agarwood fragrance microcapsules with a particle size of 1-100μm.

[0039] 3. Preparation steps of agarwood decorative materials

[0040] (1) Mix agarwood powder, cork particles and natural plant pigments evenly, add the agarwood fragrance microcapsules prepared above, spray polyurethane adhesive and stir evenly to obtain a pretreated blend.

[0041] (2) The pretreated blend is laid in a mold and cold-pressed at room temperature with a pressure of 1.5 MPa and a cold pressing time of 24 h. It is then placed in a press for cold pressing and the density is controlled to be 0.3-0.6 g / cm³ to obtain flexible agarwood decorative material.

[0042] (3) Flexible agarwood decorative materials are processed into thin decorative materials of different thicknesses by sawing, planing or rotary cutting processes.

[0043] Example 1

[0044] Preparation of agarwood essential oil microcapsules: Take 10g of agarwood essential oil, add 0.67g of sodium lignin sulfonate, and shear at 10000rpm for 8min to form an emulsion; take 5g of chitosan and dissolve it in 500g of water, heat and stir to form a 1% wall material solution; add the wall material solution to the essential oil emulsion, and control the mass fraction of essential oil in the system to 7%, the mass fraction of wall material emulsion to 40%, and the mass fraction of water to 53%. Stir at 60℃ and 900rpm, adjust the pH to 3.5 with citric acid, wash and separate after reaction, and dry at 50℃ for 8h to obtain microcapsules with a particle size of 20-80μm;

[0045] Preparation of decorative materials: Mix 50g of agarwood powder, 30g of cork granules, and 5g of chrysanthemum extract pigment evenly. Add 20g of the above microcapsules and spray with 15g of water-based polyurethane adhesive. After stirring, spread the mixture into a mold, cold press to control the density at 0.4g / cm³, and then rotary cut it into a thin decorative material with a thickness of 0.5cm.

[0046] This material is characterized by its rich agarwood aroma, which remains noticeable even after 3 years of indoor placement. It has a density of only 0.3g / cm³, is soft and easily bent, has a tensile strength of 0.25MPa, and a compression resilience of 75%, meeting the needs of home decoration.

[0047] Example 2

[0048] Preparation of agarwood essential oil microcapsules: Take 15g of agarwood essential oil, add 0.8g of polyvinyl alcohol and sodium alginate compound emulsifier (mass ratio 1:1), and shear at 10000rpm for 10min to form an emulsion; take 7.5g of β-cyclodextrin and dissolve it in 600g of water, heat and stir to form a 1.2% wall material solution; add the wall material solution to the essential oil emulsion, control the essential oil mass fraction of the system to 8%, the wall material emulsion mass fraction to 35%, and the water mass fraction to 57%, stir at 65℃ and 1000rpm, adjust the pH to 3.2 with acetic acid, wash and separate after reaction, and dry at 55℃ for 10h to obtain microcapsules with a particle size of 10-50μm;

[0049] Preparation of decorative materials: Mix 60g of agarwood powder, 25g of paulownia granules, and 3g of maple leaf extract pigment evenly. Add 25g of the above microcapsules and spray with 20g of pMDI glue. After stirring, spread the mixture into a mold, cold press to control the density at 0.5g / cm³, and then cut it into a thin decorative material with a thickness of 0.8cm.

[0050] The material has a long-lasting fragrance release, and its characteristic aroma peaks can still be detected by GC-MS after heating at 100℃ for 6 hours. It has a density of only 0.40 g / cm³, is soft and easy to bend, has a tensile strength of 0.3 MPa, and a compression recovery rate of 70%, which meets the needs of home decoration.

[0051] Example 3

[0052] Preparation of agarwood essential oil microcapsules: Take 8g of agarwood essential oil, add 0.5g of gum arabic, and shear at 10000rpm for 5min to form an emulsion; take 4g of carboxymethyl cellulose and dissolve it in 400g of water, heat and stir to form a 1% wall material solution; add the wall material solution to the essential oil emulsion, and control the mass fraction of essential oil in the system to 6%, the mass fraction of wall material emulsion to 38%, and the mass fraction of water to 56%. Stir at 55℃ and 800rpm, adjust the pH to 3.8 with malic acid, wash and separate after reaction, and dry at 45℃ for 12h to obtain microcapsules with a particle size of 30-100μm;

[0053] Preparation of decorative materials: Mix 40g of agarwood powder, 35g of diatomaceous earth, and 4g of gardenia extract pigment evenly. Add 15g of the above microcapsules and spray with 25g of polyvinyl acetate adhesive. After stirring, spread the mixture into a mold, cold press to control the density to 0.35g / cm³, and then saw it to make a thin decorative material with a thickness of 1cm.

[0054] This material is lightweight and environmentally friendly, with a density of only 0.50g / cm³. It is soft and easy to bend, with a tensile strength of 0.55MPa and a compression resilience of 60%, meeting the needs of home decoration.

[0055] Example 4

[0056] Preparation of agarwood essential oil microcapsules: Take 8g of agarwood essential oil, add 0.7g of cellulose nanocrystals, and shear at 10000rpm for 5min to form an emulsion; take 4g of carboxymethyl cellulose and dissolve it in 400g of water, heat and stir to form a 1% wall material solution; add the wall material solution to the essential oil emulsion, control the mass fraction of essential oil in the system to be 10%, the mass fraction of wall material emulsion to be 40%, and the mass fraction of water to be 50%, stir at 58℃ and 1000rpm, adjust the pH to 3.0 with 20% citric acid, wash and separate after reaction, and dry at 45℃ for 12h to obtain microcapsules with a particle size of 10-30μm;

[0057] Preparation of decorative materials: Mix 30g of agarwood powder, 55g of balsamic granules, and 4g of gardenia extract pigment evenly. Add 15g of the above microcapsules and spray with 30g of water-based polyurethane adhesive. After stirring, spread the mixture into a mold, cold press to control the density at 0.60g / cm³, and then saw it to make a thin decorative material with a thickness of 1cm.

[0058] This material is lightweight and environmentally friendly, with a density of only 0.50g / cm³. It is soft and easy to bend, with a tensile strength of 0.6MPa and a compression resilience of 55%, meeting the needs of home decoration.

[0059] Performance Testing: GC-MS testing of the agarwood decorative materials in Examples 1-4 was conducted according to GB / T 11538-2006 and LY / T 3361-2023 to determine the aroma characteristic peaks and durability of the materials. The test results are as follows: Figure 1 As shown in Table 1:

[0060]

[0061] Table 1. Characteristic aroma peaks and relative contents of agarwood decorative materials

[0062] The decorative material exhibits good fragrance release durability, retaining its agarwood aroma even after being heated at 100℃ for 6 hours. GC-MS analysis revealed characteristic aroma peaks. The results showed that the characteristic aroma consisted of various volatile components, primarily sesquiterpenes, including curcumene, agaricone, dihydroagarinuran, and santalinol, which are common aroma compounds in agarwood decorative materials. Specifically, santalinol accounted for 10-20%, curcumene for 3-5%, agaricone for 1-3%, and dihydroagarinuran for 0.5-1.0%.

[0063] According to national standards GB / T 17657-2022 and LY / T 1320-2010, the physical properties of Examples 1-4, including density, tensile strength, compression resilience, and softness, were tested. The test results are shown in Table 2 below:

[0064]

[0065] Table 2 Physical property tests of agarwood decorative materials

[0066] The test results show that from Example 1 to Example 4, as the adhesive content gradually increases, the density of the composite material increases, and the tensile strength gradually strengthens. However, the compression rebound rate of the material gradually decreases, and the flexibility of the material also gradually declines. By combining agarwood raw materials with porous biomass materials, the adsorption and interweaving of agarwood within the porous materials are improved, effectively solving the problem of poor aroma release performance in agarwood engineered wood panels. The use of reactive flexible polymer resin improves the interfacial bonding performance between the oil-rich agarwood material and the biomass reinforcing and toughening agent, effectively enhancing the flexibility, processability, and decorative properties of the composite decorative material.

[0067] The agarwood decorative material prepared by this invention can be directly fixed to the surface of objects such as walls, wardrobes, and headboards, combining decorative and health benefits. The agarwood fragrance microcapsules prepared by this invention can also be applied to the field of artificial board decorative materials, providing the home building materials industry with green, healthy, and functional new material options.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for preparing an agarwood decorative material with health and wellness benefits, characterized in that: Includes the following steps: 1) Mix powdered, fibrous or shaving agarwood raw materials, porous biomass materials, and natural plant pigments evenly, then add agarwood fragrance microcapsules and reactive flexible polymer resin and stir evenly to obtain a pretreated blend. 2) The pretreated blend is laid in a mold and cold-pressed at room temperature, with the density controlled at 0.2-0.6 g / cm³, to obtain flexible agarwood decorative material; 3) The agarwood essence microcapsules are processed into thin decorative materials by sawing, planing or rotary cutting processes; the agarwood essence microcapsules are prepared from agarwood essential oil obtained by steam distillation or agarwood essential oil refined by supercritical CO2 extraction and molecular distillation.

2. The method for preparing an agarwood decorative material with health and wellness benefits according to claim 1, characterized in that: The porous biomass material is selected from at least one of balsa wood, cork, diatomaceous earth, and paulownia.

3. The method for preparing an agarwood decorative material with health and wellness benefits according to claim 1, characterized in that: The reactive flexible polymer resin is selected from at least one of waterborne polyurethane, pMDI, and polyvinyl acetate adhesive, and contains no formaldehyde.

4. The method for preparing an agarwood decorative material with health and wellness benefits according to claim 1, characterized in that: The preparation of the agarwood fragrance microcapsules includes: dispersing agarwood essential oil at high speed in an emulsifier aqueous solution to form an emulsion, mixing it with a microcapsule wall material solution, heating and stirring at 50-70℃ and 800-1000rpm, adjusting the pH to 3-4 with a catalyst, and then washing, separating and drying to obtain the product.

5. The method for preparing an agarwood decorative material with health and wellness benefits according to claim 4, characterized in that: The emulsifier is selected from at least one of sodium lignosulfonate, cellulose nanocrystals, polyvinyl alcohol, sodium alginate, and gum arabic, and the mass ratio of the emulsifier to agarwood essential oil is 1:15-20.

6. The method for preparing an agarwood decorative material with health and wellness benefits according to claim 4, characterized in that: The microcapsule wall material is selected from at least one of chitosan, β-cyclodextrin, carboxymethyl cellulose, and zein, and the wall material solution concentration is 0.5-2%.

7. The method for preparing an agarwood decorative material with health and wellness benefits according to claim 4, characterized in that: In the microcapsule dispersion, the mass fraction of agarwood essential oil is 5-10%, the mass fraction of microcapsule wall material emulsion is 30-50%, the mass fraction of water is 50-70%, and the mass ratio of agarwood essential oil to wall material is 2:

1.

8. A method for preparing an agarwood decorative material with health and wellness benefits according to any one of claims 1-7, characterized in that: The fragrance release time is ≥3 years, and the characteristic aroma of agarwood can still be detected after heating at 100℃ for 6 hours. The density is 0.2-0.6 g / cm³, and it has good flexibility and no formaldehyde release.

9. A method for preparing an agarwood decorative material with health and wellness benefits according to claim 8, characterized in that: The released agarwood characteristic aroma components are mainly sesquiterpenes.

10. The application of agarwood essence microcapsules in wood-based decorative materials according to any one of claims 4-7, which are part of the preparation method of agarwood decorative materials with health and wellness effects.

Images