An inorganic powdered aromatherapy coating and its preparation and application methods

Abstract

This invention discloses an inorganic powdered aromatherapy coating and its preparation and application methods. The coating comprises the following raw materials in weight percentages: slaked lime powder: 50%–65%; glutinous rice extract: 10%–18%; short-cut hemp fibers (80-120 mesh): 5%–10%; short cotton fibers (100-150 mesh): 3%–8%; natural mineral fillers: 5%–12%; composite fragrance powder: 8%–15%; nano-silica: 0.5%–2%; and natural plant adhesives: 0.5%–2%. This invention utilizes modern microencapsulation technology, fiber orientation process, and optimized inorganic matrix formulation to prepare the inorganic powdered aromatherapy coating. This coating not only provides a long-lasting, health-beneficial aroma release but also allows for the creation of various modern artistic textures through application techniques, achieving a deep integration of material and aesthetics. It is suitable for the restoration of ancient buildings, Chinese garden architecture, and interior wall decoration of health-oriented living spaces.

Description

Technical Field

[0001] This invention relates to the field of coating technology, specifically to an inorganic powdered aromatherapy coating and its preparation and application methods. Background Technology

[0002] Traditional Chinese building wall materials are represented by "glutinous rice mortar," which uses quicklime, glutinous rice juice, and plant fibers as raw materials. It possesses excellent adhesion, durability, and breathability, and is widely used in important buildings such as palaces, city walls, and tombs. This type of material belongs to an inorganic cementing system, is environmentally friendly, fireproof, and has a long lifespan, reflecting the superb wisdom of ancient craftsmen.

[0003] On the other hand, the ancient Chinese royal incense culture has a long history, especially the "palace blended incense" from the Han and Tang dynasties to the Ming and Qing dynasties. Royal nobles often burned incense in palaces and sleeping quarters to ward off evil, calm the mind, and maintain health. The incense used was mostly made of precious medicinal materials such as agarwood, sandalwood, cloves, and styrax, forming a systematic "aromatherapy" system, which has the effects of regulating emotions, improving the microenvironment, and preventing diseases.

[0004] However, the traditional use of spices has the following problems:

[0005] Incense burning has drawbacks such as fire hazards, smoke pollution, and the need for continuous manual operation, making it difficult to apply to modern and ancient building restoration scenarios.

[0006] Fragrances are easily deactivated in inorganic alkaline environments, and their aroma evaporates too quickly, making it difficult to achieve long-term sustained release.

[0007] Existing antique-style coatings mostly focus on imitating appearance, lacking cultural connotation and functional integration, and failing to achieve a deep integration of "material" and "culture". Summary of the Invention

[0008] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0009] 1. Technical problems to be solved:

[0010] To address the shortcomings of the aforementioned incense burning methods, such as fire hazards, smoke pollution, and the need for continuous manual operation; as well as the instability of traditional incense in alkaline environments and the focus on merely imitating appearances, this invention is proposed.

[0011] Therefore, the purpose of this invention is to provide an inorganic powdered aromatherapy coating and its preparation and application methods. This invention combines traditional wall materials with aromatherapy culture, protects the activity of fragrances through modern microencapsulation technology, solves the problem of instability of traditional fragrances in alkaline environments, and achieves long-term sustained release of aroma. At the same time, through fiber orientation process and specific application methods, various artistic textures can be created, which not only preserves the decorative features of ancient buildings, but also endows them with modern functions and aesthetic value.

[0012] 2. Technical Solution:

[0013] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0014] The raw material composition includes the following weight percentages:

[0015] slaked lime powder: 50%–65%;

[0016] Glutinous rice extract: 10%–18%;

[0017] Short shredded hemp fiber (80 mesh to 120 mesh): 5% to 10%;

[0018] Cotton staple fiber (100 mesh to 150 mesh): 3% to 8%;

[0019] Natural mineral fillers: 5%–12%;

[0020] Compound fragrance powder: 8%–15%;

[0021] Nano-silica: 0.5%–2%;

[0022] Natural plant adhesives: 0.5%–2%.

[0023] In a preferred embodiment of the inorganic powdered aromatherapy coating of the present invention, in step S2, the composite fragrance powder is composed of the following fragrances by weight percentage:

[0024] Sandalwood powder: 30%–40%;

[0025] Agarwood powder: 25%–30%;

[0026] Clove powder: 10%–15%;

[0027] Styrax powder: 8%–12%;

[0028] Angelica dahurica powder: 7%–10%;

[0029] Acorus calamus powder: 5%–8%;

[0030] Musk substitutes: 5%–7%;

[0031] The musk substitute is artificial musk or valerian root extract, and the composite fragrance powder is microencapsulated, with the microcapsule wall material being a composite system of Carbopol 971P and glutinous rice glue.

[0032] As a preferred embodiment of the inorganic powdered aromatherapy coating of the present invention, the microcapsule preparation parameters are as follows:

[0033] Core material: The composite fragrance powder is ultra-finely pulverized to a mesh size of 200 or higher;

[0034] Wall material: The Carbopol 971P is compounded with glutinous rice glue at a mass ratio of 1:1 to 3:1;

[0035] Coating method: spray drying, inlet air temperature 160℃~180℃, outlet air temperature 70℃~90℃, wall material concentration 8-12wt%;

[0036] Particle size: 20-50 μm, coating rate ≥95%, fragrance retention rate ≥90% after 24 months in an alkaline environment of pH 11-13.

[0037] In a preferred embodiment of the inorganic powdered aromatherapy coating of the present invention, in step S6, the natural mineral filler is selected from one or more of kaolin, talc, and zeolite.

[0038] In a preferred embodiment of the inorganic powdered aromatherapy coating of the present invention, the nano-silica particles have a particle size ≤100nm.

[0039] In a preferred embodiment of the inorganic powdered aromatherapy coating of the present invention, the natural plant adhesive is selected from one or more of peach gum and okra gum.

[0040] In addition, the present invention also provides a method for preparing the above-mentioned inorganic powdered aromatherapy coating, which includes the following steps:

[0041] S1. Raw material pretreatment: The quicklime powder, glutinous rice extract, hemp fiber shreds, cotton fiber stubs, natural mineral filler, nano silica, natural plant adhesive and microcapsules are pretreated respectively.

[0042] S2. Premixing: The quicklime powder, glutinous rice extract, short shredded hemp fiber, short cotton fiber, natural mineral filler, nano silica and natural plant adhesive are put into a mixing device and stirred at low speed in one direction to form a uniform dry powder base.

[0043] S3. Main mixing: The microcapsules are added to the above mixing equipment and mixed further to form the final coating.

[0044] S4. Packaging: The final coating is packaged and stored.

[0045] Furthermore, the present invention also provides a method for applying the above-mentioned inorganic powdered aromatherapy coating, which includes the following steps:

[0046] S5. Surface preparation: Clean and prepare the wall surface to be coated, ensuring that the surface is flat, clean and dry;

[0047] S6. First layer construction: Add water and stir at a water-cement ratio of 0.6-0.7, and stir the short shredded hemp fibers in one direction at low speed to arrange them in the same direction to form a textured support frame;

[0048] S7. Second layer application: Add water to the cement mixture at a water-cement ratio of 0.7-0.8 and stir. Use an embossing roller or embossing mold to press traditional art textures onto the not-completely-dry paint layer.

[0049] S8. Maintenance: Natural ventilation, avoid direct sunlight, standard maintenance every 7 days.

[0050] 3. Beneficial effects:

[0051] Compared with the prior art, the beneficial effects of the present invention are:

[0052] This type of inorganic powdered aromatherapy coating:

[0053] 1. This invention utilizes microencapsulation technology to effectively protect fragrances from degradation in alkaline environments, achieving sustained aroma release. Experiments show that, under 25℃ / 50%RH conditions, the eugenol retention rate remains at 62% after 6 months, far superior to the 15% retention rate after 30 days when fragrances are directly added, demonstrating long-lasting and stable aromatherapy effects.

[0054] 2. The present invention is modified with nano-silica, and the bonding strength reaches 0.8MPa after 28 days, which is 4 times that of traditional glutinous rice mortar, and has superior structural performance.

[0055] 3. This invention, through fiber orientation and specific construction techniques, can create various traditional artistic textures, such as the "pepper coating" texture of the Han Dynasty, the "cloud pattern" of the Tang Dynasty, and the "repeating pattern" of the Qing Dynasty. The textured layer retains 98% integrity after 10 freeze-thaw cycles (-20℃~50℃), and its scrub resistance reaches level 1 after 5 cycles, ensuring the artistic texture is durable and beautiful.

[0056] 4. This invention is a completely inorganic system, free of VOCs, formaldehyde, and benzene compounds, complying with GB 18582-2020 "Limits of Hazardous Substances in Building Wall Coatings". Simultaneously, the fragrance has calming, invigorating, dehumidifying, and antibacterial effects, with an antibacterial rate of 85% (Escherichia coli, GB / T 15407-2019), making it environmentally friendly and safe.

[0057] 5. This invention can be applied using traditional troweling, roller coating, or spraying methods, and is suitable for creating various artistic textures. The application process is simple, efficient, and allows for standardized production, offering flexibility and variety in application techniques. Attached Figure Description

[0058] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0059] Figure 1 This is a process flow diagram of the preparation process of an inorganic powdered aromatherapy coating, its preparation method, and its application method according to the present invention;

[0060] Figure 2 This is an enlarged schematic diagram of the microcapsule structure of an inorganic powdered aromatherapy coating, its preparation method, and its application method according to the present invention. Detailed Implementation

[0061] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0062] This invention is described in detail with reference to the schematic diagrams. When describing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0063] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0064] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] The embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0066] This invention provides an overall structural schematic diagram of an embodiment of an inorganic powdered aromatherapy coating, its preparation method, and its application method, including:

[0067] Please see Figure 1-2 The inorganic powdered aromatherapy coating of this embodiment comprises the following raw materials in weight percentage:

[0068] slaked lime powder: 50%–65%;

[0069] Glutinous rice extract: 10%–18%;

[0070] Short shredded hemp fiber (80 mesh to 120 mesh): 5% to 10%;

[0071] Cotton staple fiber (100 mesh to 150 mesh): 3% to 8%;

[0072] Natural mineral fillers: 5%–12%;

[0073] Compound fragrance powder: 8%–15%;

[0074] Nano-silica: 0.5%–2%;

[0075] Natural plant adhesives: 0.5%–2%.

[0076] Next, specifically in step S2, the compound fragrance powder is composed of the following fragrances by weight percentage:

[0077] Sandalwood powder: 30%–40%;

[0078] Agarwood powder: 25%–30%;

[0079] Clove powder: 10%–15%;

[0080] Styrax powder: 8%–12%;

[0081] Angelica dahurica powder: 7%–10%;

[0082] Acorus calamus powder: 5%–8%;

[0083] Musk substitutes: 5%–7%;

[0084] Musk substitutes are artificial musk or valerian root extract. The compound fragrance powder is microencapsulated, and the microcapsule wall material is a composite system of Carbopol 971P and glutinous rice glue.

[0085] Furthermore, specifically, the microcapsule preparation parameters are as follows:

[0086] Core material: Composite fragrance powder ultra-finely pulverized to over 200 mesh;

[0087] Wall material: Carbopol 971P and glutinous rice glue are compounded at a mass ratio of 1:1 to 3:1;

[0088] Coating method: spray drying, inlet air temperature 160℃~180℃, outlet air temperature 70℃~90℃, wall material concentration 8-12wt%;

[0089] Particle size: 20-50 μm, coating rate ≥95%, fragrance retention rate ≥90% after 24 months in an alkaline environment of pH 11-13.

[0090] Next, specifically in step S6, the natural mineral filler is selected from one or more of kaolin, talc, and zeolite.

[0091] Specifically, the particle size of nano-silica is ≤100nm.

[0092] Specifically, the natural plant adhesive is selected from one or more of peach gum and okra gum.

[0093] A method for preparing inorganic powdered aromatherapy coatings includes the following steps:

[0094] S1. Raw material pretreatment: Quicklime powder, glutinous rice extract, short shredded hemp fiber, short cotton fiber, natural mineral filler, nano silica, natural plant adhesive and microcapsules are pretreated respectively.

[0095] S2. Premixing: Quicklime powder, glutinous rice extract, short shredded hemp fiber, short cotton fiber, natural mineral filler, nano silica and natural plant adhesive are put into a mixing device and stirred at low speed in one direction to form a uniform dry powder base.

[0096] S3. Main mixing: Add the microcapsules to the above mixing equipment and continue mixing to form the final coating;

[0097] S4. Packaging: Seal and store the final coating.

[0098] The application method for inorganic powdered aromatherapy coatings includes the following steps:

[0099] S5. Surface preparation: Clean and prepare the wall surface to be coated, ensuring that the surface is flat, clean and dry;

[0100] S6. First layer construction: Add water and mix with a water-cement ratio of 0.6-0.7. Mix the short shredded hemp fibers in one direction at low speed to make them align in the same direction and form a textured support frame.

[0101] S7. Second layer application: Add water to the cement mixture at a water-cement ratio of 0.7-0.8 and mix. Use an embossing roller or embossing mold to press traditional art textures onto the not-yet-completely-dry paint layer.

[0102] S8. Maintenance: Natural ventilation, avoid direct sunlight, standard maintenance every 7 days.

[0103] Example 1

[0104] Preparation of standard formulation:

[0105] Raw material ratio (total weight 100kg): 58kg of hydrated lime powder;

[0106] Glutinous rice flour: 15kg;

[0107] Short shredded hemp fiber (100 mesh): 8 kg;

[0108] Cotton staple fiber (120 mesh): 6 kg;

[0109] Natural mineral filler (7kg kaolin, 3kg talc, 2kg zeolite): 12kg;

[0110] Compound fragrance powder: 12kg (sandalwood powder 4.2kg, agarwood powder 3.0kg, clove powder 1.5kg, styrax powder 1.0kg, angelica powder 0.9kg, calamus powder 0.6kg, artificial musk 0.8kg);

[0111] Nano-silica: 1.5kg;

[0112] Peach gum: 1.5kg;

[0113] Preparation process:

[0114] Premixing: Add quicklime powder, glutinous rice flour, hemp fiber, cotton fiber, natural mineral filler, nano silica, and peach gum into a twin-shaft zero-gravity mixer;

[0115] Stir at low speed in one direction (200 rpm clockwise) for 10 minutes to ensure the fibers are oriented.

[0116] Methods for forming fiber-oriented textures include:

[0117] The short shredded hemp fibers are stirred in one direction at low speed to align them in the same direction.

[0118] Apply the first coat of paint to create the textured support framework;

[0119] Use an embossing roller or embossing mold to press traditional art textures onto the second layer of paint;

[0120] The depth of the embossed roller texture is 0.5-1mm, and the applied pressure is 0.1-0.3MPa;

[0121] Main mixing: Add the microcapsule-coated compound fragrance powder and continue mixing for 25 minutes;

[0122] The mixing temperature should be controlled at 25-30℃ to avoid the volatilization of fragrances due to high temperatures.

[0123] Neutralization treatment: Add 8% calcium hydroxide dry powder to the wall material and stir for 30 minutes until pH 7.5;

[0124] Packaging: The finished product is weighed and packaged by an automatic packaging machine, each bag weighing 25kg. The inner lining is a moisture-proof plastic film bag, and the outer woven bag is sealed for storage.

[0125] Performance testing:

[0126] The bond strength reached 0.5 MPa after 28 days;

[0127] Aroma release: Eugenol retention rate was 62% after 36 months (GC-MS detection, HP-5MS column, final temperature 250℃).

[0128] Antibacterial rate: 85% (Escherichia coli, GB / T 15407-2019);

[0129] Texture stability: cloud pattern depth 0.8mm, texture retention 98% after 10 freeze-thaw cycles, and stain resistance level 1 after 5 scrub cycles;

[0130] Environmental performance: VOCs were not detected, which complies with GB18582-2020 standards.

[0131] Example 2

[0132] Texture-optimized formula:

[0133] Raw material ratio adjustment: hemp fiber increased to 12kg, talcum powder reduced to 3kg;

[0134] Add 0.5% nano-silica (0.5kg);

[0135] The compound fragrance powder is adjusted to 10kg (the proportion of agarwood powder is increased to 35%).

[0136] Texture creation method: Use laser engraving cloud pattern roller (texture depth 0.6mm);

[0137] Apply a pressure of 0.25 MPa and roll the undried coating layer;

[0138] After drying for 48 hours, spray with water and maintain for 3 days.

[0139] The final cloud pattern depth reached 0.9mm, with clear and beautiful texture;

[0140] Performance testing: Crack resistance of textured layer: Crack width ≤ 0.3mm (fiber orientation inhibits propagation);

[0141] Temperature resistance: After 10 freeze-thaw cycles, the coating showed no powdering, cracking, peeling, or blistering.

[0142] Stain resistance: ≤1 after 5 cycles of testing, far superior to the standard requirement of ≤2.

[0143] Example 3

[0144] Enhanced functional formula:

[0145] Raw material ratio adjustment: Nano silica increased to 2 kg;

[0146] The amount of quicklime powder was reduced to 56 kg.

[0147] Add 0.5% xanthan gum as a suspending agent;

[0148] The compound fragrance powder was adjusted to 15kg (the proportion of clove powder was increased to 18%).

[0149] Performance testing: Bond strength: 0.8 MPa after 28 days, which is 1.6 times that of Example 1;

[0150] Aroma release: Eugenol retention rate still reached 75% after 36 months;

[0151] Antibacterial rate: 92% (Escherichia coli, GB / T 15407-2019);

[0152] Texture stability: the width of the crack between ice crack layers is ≤0.3mm, and the pressure of the embossing mold is 0.25MPa.

[0153] Comparative example:

[0154] Traditional glutinous rice ash paste:

[0155] Formula: 70% slaked lime powder, 15% glutinous rice juice, 15% plant fiber;

[0156] Performance testing: 28-day bond strength: 0.2 MPa;

[0157] It has no aromatherapy function, and the fragrance retention rate is only 12% after 30 days.

[0158] It lacks the ability to form textures, resulting in a flat, uniform surface.

[0159] Environmental performance: Contains organic glutinous rice juice, with a high VOC content.

[0160] Examples and comparative analyses are provided, along with a comparison chart of the curing performance of the present invention and traditional glutinous rice mortar:

[0161] Maintenance time The coating of this invention Traditional glutinous rice mortar Compressive strength (MPa) Bond strength (MPa) Bond strength (MPa) 1 day (early intensity) 0.1 0.08 7 days 0.3 0.1 14 days 0.6 0.12 28 days (stable intensity) 0.8 0.2

[0162] By comparing the embodiments and comparative examples, it can be seen that the present invention has the following significant advantages:

[0163] Structural strength: Bond strength increased by 400% (0.8 MPa vs 0.2 MPa);

[0164] Aromatherapy benefits: Extended fragrance retention time (36 months vs. 30 days);

[0165] Texture formation: Capable of creating a variety of traditional artistic textures with high texture stability;

[0166] Environmental performance: It is an all-inorganic system with no detected VOCs, which is far superior to traditional glutinous rice mortar.

[0167] Preferred parameters for the embodiment:

[0168] Optimal parameters for microcapsule preparation: Wall material: Carbopol 971P to glutinous rice glue in a mass ratio of 1:2;

[0169] Spray drying parameters: inlet air temperature 170℃, outlet air temperature 80℃, wall material concentration 10wt%;

[0170] Particle size: 30-40μm, coating rate ≥98%, fragrance retention rate ≥95%;

[0171] Fiber orientation optimization parameters: Hemp fiber stirring direction: clockwise unidirectional stirring;

[0172] Stirring speed: 200 rpm;

[0173] Mixing time: 10 minutes;

[0174] Coating thickness: 1mm for the first layer, 1.5mm for the second layer;

[0175] Optimal parameters for texture creation:

[0176] Embossed roller texture depth: 0.6mm;

[0177] Applied pressure: 0.25 MPa;

[0178] Drying time: 24 hours for the first layer, 48 hours for the second layer;

[0179] Water spraying maintenance: Spray water twice a day for 3 days.

[0180] Inorganic powdered aromatherapy coatings are used in the restoration of ancient buildings, the interior wall decoration of Chinese garden architecture or health-preserving living spaces. Health-preserving living spaces include bedrooms, studies, meditation rooms and other places that require calming the mind and regulating emotions. The restoration of ancient buildings includes the wall restoration of important buildings such as palaces and city walls.

[0181] Example 4:

[0182] An inorganic powdered aromatherapy coating is composed of the following raw materials by weight percentage:

[0183] Quicklime powder: 50-65% (provides an alkaline environment and structural strength);

[0184] Glutinous rice flour or glutinous rice extract: 10–18% (provides organic binding power and enhances toughness):

[0185] Short chopped hemp fibers (80-120 mesh): 5-10% (plant fiber reinforcement, crack resistance, toughening, antique finish):

[0186] Short cotton fibers (100-150 mesh): 3-8% (fine fiber filler, improving workability and surface density);

[0187] Natural mineral fillers: 5-12% (selected from one or more of kaolin, talc, and zeolite powder to adjust rheology and hygroscopicity);

[0188] Compound fragrance powder: 8-15% (core aromatherapy functional components, microencapsulated);

[0189] Nano-silica: 0.5–2% (accelerates lime carbonization and improves early strength):

[0190] Natural plant adhesives: 0.5-2% (selected from peach gum and okra gum to enhance the adhesion between powders);

[0191] The compound fragrance powder is composed of the following fragrances by weight percentage:

[0192] Sandalwood powder: 30-40%;

[0193] Agarwood powder: 25-30%;

[0194] Styrax powder: 8-12%;

[0195] Angelica dahurica powder: 7-10%;

[0196] Acorus calamus powder: 5-8%;

[0197] Musk substitute: 5-7% (preferably artificial musk or valerian root extract);

[0198] Compound fragrance powder is microencapsulated:

[0199] Core material: The above-mentioned composite fragrance powder is ultra-finely pulverized to a mesh size of 200 or finer; Wall material: Carbopol 971P and glutinous rice glue are compounded at a mass ratio of 1:1 to 3:1, or gum arabic is compounded with maltodextrin; Coating method: Spray drying, inlet air temperature 160-180℃, outlet air temperature 70-90℃, wall material concentration 8-12wt%; Particle size: 20-50μm, coating rate ≥95%, fragrance retention rate ≥90% after 24 months in an alkaline environment of pH 12.5.

[0200] Methods for forming fiber-oriented textures:

[0201] Hemp fibers are oriented by unidirectional low-speed stirring (200 rpm, 10 minutes) to provide a texture support framework. After cotton fibers are mixed with microcapsule fragrance powder, they are filled into the mold pattern by transverse rolling (pressure 0.1-0.3 MPa) through an embossed roller. The relationship between the texture layer thickness and the embossing depth is: the coating layer thickness ≥ 2 times the embossing depth (e.g., a 0.5 mm texture requires a 1 mm coating layer).

[0202] A method for preparing inorganic powdered aromatherapy coatings includes the following steps;

[0203] Raw material pretreatment:

[0204] The quicklime powder is sieved through a 100-mesh sieve to remove coarse particles;

[0205] Glutinous rice flour or glutinous rice extract is obtained by spray drying, with a moisture content of ≤5%.

[0206] Hemp fibers are soaked in 75% ethanol solution at 60℃ for 2 hours, dewaxed, rinsed with water, and cut into 80-120 mesh pieces;

[0207] Cotton fibers were treated with 5wt% NaOH solution at 80℃ for 1 hour, degreased, washed with water until neutral, and pulverized to 100-150 mesh;

[0208] Nano-silica is pulverized by airflow, with a particle size ≤100nm;

[0209] Preparation of microcapsule fragrance powder: The core material is ultra-fine pulverized fragrance powder, and the wall material is a composite system of Carbopol 971P and glutinous rice glue. The spray drying parameters are as above.

[0210] Premixed:

[0211] Quicklime powder, glutinous rice flour, chopped hemp fiber, short cotton fiber, natural mineral filler, nano silica, and natural plant adhesive are put into a twin-shaft zero-gravity mixer.

[0212] Mix for 10-20 minutes at 25 Hz to form a uniform dry powder base;

[0213] Stirring direction control: Use unidirectional stirring (such as clockwise) to ensure fiber orientation;

[0214] Main mixture:

[0215] Add the microcapsule-encapsulated compound fragrance powder to the above-mentioned mixer;

[0216] Continue mixing for 20-30 minutes, keeping the mixing temperature between 25℃ and 30℃.

[0217] Neutralization treatment: Add 5-10% calcium hydroxide dry powder to the wall material to adjust the pH to 7-8 to avoid reaction with the inorganic matrix;

[0218] Package:

[0219] The finished product is weighed and packaged by an automatic packaging machine, with each bag weighing 25kg.

[0220] Inner plastic film moisture-proof bag, outer woven bag, sealed for storage;

[0221] The application method for inorganic powdered aromatherapy coatings includes the following steps:

[0222] Substrate preparation: Clean and prepare the wall surface to be coated, ensuring that the substrate is flat, clean, and dry;

[0223] The base layer should have a moisture content of ≤10%, a pH value of ≤10, and be free of oil and dust.

[0224] First layer (base layer) construction: water-cement ratio: 0.6-0.7;

[0225] Stirring direction control: Use unidirectional low-speed stirring (200 rpm, 10 minutes) to ensure the directional alignment of hemp fibers;

[0226] Application thickness: 1mm; Drying time: 24 hours;

[0227] Second layer (texture layer) application: water-cement ratio: 0.7-0.8;

[0228] Texture creation: Traditional artistic textures are pressed onto the not-yet-fully-dried paint layer using embossing rollers or embossing molds.

[0229] Embossed roller parameters: texture depth 0.5-1mm, applied pressure 0.1-0.3MPa;

[0230] Embossing die parameters: 0.5mm shallow relief nickel die, embossing retention rate ≥80%;

[0231] Maintenance treatment: Water spraying: Spray water for 3 days after drying to promote coating carbonization and fiber network formation;

[0232] Environmental control: Natural ventilation, avoid direct sunlight, and maintain a temperature of 20±5℃ and a relative humidity of 50-60% during the maintenance period;

[0233] Final drying: 7 days of standard curing to reach final strength.

[0234] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An inorganic powdered aromatherapy coating, characterized in that, The raw material composition includes the following weight percentages: slaked lime powder: 50%–65%; Glutinous rice extract: 10%–18%; Short shredded hemp fiber (80 mesh to 120 mesh): 5% to 10%; Cotton staple fiber (100 mesh to 150 mesh): 3% to 8%; Natural mineral fillers: 5%–12%; Compound fragrance powder: 8%–15%; Nano-silica: 0.5%–2%; Natural plant adhesives: 0.5%–2%.

2. The inorganic powdered aromatherapy coating according to claim 1, characterized in that, In step S2, the compound fragrance powder is composed of the following fragrances by weight percentage: Sandalwood powder: 30%–40%; Agarwood powder: 25%–30%; Clove powder: 10%–15%; Styrax powder: 8%–12%; Angelica dahurica powder: 7%–10%; Acorus calamus powder: 5%–8%; Musk substitutes: 5%–7%; The musk substitute is artificial musk or valerian root extract, and the composite fragrance powder is microencapsulated, with the microcapsule wall material being a composite system of Carbopol 971P and glutinous rice glue.

3. The inorganic powdered aromatherapy coating according to claim 2, characterized in that, The microcapsule preparation parameters are as follows: Core material: The composite fragrance powder is ultra-finely pulverized to a mesh size of 200 or higher; Wall material: The Carbopol 971P is compounded with glutinous rice glue at a mass ratio of 1:1 to 3:1; Coating method: spray drying, inlet air temperature 160℃~180℃, outlet air temperature 70℃~90℃, wall material concentration 8-12wt%; Particle size: 20-50 μm, coating rate ≥95%, fragrance retention rate ≥90% after 24 months in an alkaline environment of pH 11-13.

4. The inorganic powdered aromatherapy coating according to claim 3, characterized in that, In step S6, the natural mineral filler is selected from one or more of kaolin, talc, and zeolite.

5. The inorganic powdered aromatherapy coating according to claim 4, characterized in that, The nano-silica particles have a diameter of ≤100nm.

6. The inorganic powdered aromatherapy coating according to claim 5, characterized in that, The natural plant adhesive is selected from one or more of peach gum and okra gum.

7. A method for preparing an inorganic powdered aromatherapy coating as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Raw material pretreatment: The quicklime powder, glutinous rice extract, hemp fiber shreds, cotton fiber stubs, natural mineral filler, nano silica, natural plant adhesive and microcapsules are pretreated respectively. S2. Premixing: The quicklime powder, glutinous rice extract, short shredded hemp fiber, short cotton fiber, natural mineral filler, nano silica and natural plant adhesive are put into a mixing device and stirred at low speed in one direction to form a uniform dry powder base. S3. Main mixing: The microcapsules are added to the above mixing equipment and mixed further to form the final coating. S4. Packaging: The final coating is packaged and stored.

8. A method for applying inorganic powdered aromatherapy coatings, characterized in that, Using the inorganic powdered aromatherapy coating as described in any one of claims 1 to 6 includes the following steps: S5. Surface preparation: Clean and prepare the wall surface to be coated, ensuring that the surface is flat, clean and dry; S6. First layer construction: Add water and stir at a water-cement ratio of 0.6-0.7, and stir the short shredded hemp fibers in one direction at low speed to arrange them in the same direction to form a textured support frame; S7. Second layer application: Add water to the cement mixture at a water-cement ratio of 0.7-0.8 and stir. Use an embossing roller or embossing mold to press traditional art textures onto the not-completely-dry paint layer. S8. Maintenance: Natural ventilation, avoid direct sunlight, standard maintenance every 7 days.

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