Physical-environment double-triggering type odor-removing fragrance-releasing shoe cabinet based on essential oil microcapsule controlled-release plate

Abstract

The invention discloses a physical-environment double-triggering type odor-removing fragrance-releasing shoe cabinet based on essential oil microcapsule controlled-release plates, and belongs to the technical field of intelligent furniture. According to the shoe cabinet, microcapsules (the particle size is 10-500 microns, and the compressive strength is larger than or equal to 2.5 MPa) for packaging natural tea tree essential oil are dispersed on a plate surface treatment layer, and precise slow release is achieved through a double-trigger mechanism of physical friction (0.5-3 N / cm stress) and environment temperature and humidity (25-45 DEG C, RH is 50-90%). The plate adopts a multi-layer structure design, integrates a temperature and humidity sensor, a piezoelectric ceramic vibrator and a fuzzy PID control system, and dynamically adjusts the release rate of essential oil. Experiments show that the release half-life period of the essential oil reaches 180 days, and the staphylococcus aureus inhibition rate is gt; the isovaleric acid removal rate is gt; the problems that a traditional shoe cabinet is single in function, short in time efficiency and the like are effectively solved, and the shoe cabinet is suitable for multi-scene shoe storage and air purification.

Description

Technical Field

[0001] This invention belongs to the field of intelligent furniture technology, specifically a shoe cabinet that uses controlled-release essential oil microcapsules to achieve dual-trigger releases triggered by physical friction and ambient temperature and humidity. This shoe cabinet integrates polymer material preparation, microcapsule controlled release, and environmental adaptation technologies to address the challenges of traditional shoe cabinets in synergistically controlling odor removal, fragrance release, and environmental adaptability. It is suitable for shoe storage and air purification in homes, offices, and commercial spaces. Background Art

[0002] 1. Analysis of existing technologies

[0003] Traditional shoe cabinet odor treatment and fragrance release technologies have the following limitations:

[0004] Activated carbon adsorption: The adsorption capacity of mainstream activated carbon technology decreases by 30%-50% in a high humidity environment (RH>70%), and it can only passively adsorb odors and cannot actively release aromatic components, which is prone to secondary pollution due to saturation.

[0005] Aromatherapy volatilization control: Conventional aromatherapy products (such as sachets and scented tablets) rely on natural volatilization, and the volatilization rate is significantly affected by temperature (the volatilization rate increases 2-3 times for every 10°C increase in temperature), resulting in insufficient aroma in low-temperature environments and excessive aroma in high-temperature environments. They are also prone to agglomeration and ineffectiveness after being exposed to moisture, and their effective duration is usually no more than 30 days.

[0006] Application gaps in microcapsule technology: Existing microcapsule technology is mostly focused on the daily chemical field. It has not solved the problem of coordinated control of friction triggering and temperature and humidity response in furniture panel scenarios, and lacks technical solutions for integrated design with panel structures, making it difficult to meet the functional stability requirements of shoe cabinets for long-term use.

[0007] 2. Summary of technical pain points

[0008] Monofunctionalization: Existing technologies only achieve a single function of adsorption or release, are unable to dynamically neutralize odor molecules (such as isovaleric acid and thiols), and lack the synergistic design of antibacterial functions.

[0009] Poor timeliness: The activated carbon adsorption cycle is ≤15 days, and the effective duration of the aromatherapy product is ≤30 days. It needs to be replaced frequently, and the cost of use is high.

[0010] Environmental sensitivity: The release rate is significantly affected by temperature and humidity. In an environment with temperature fluctuations of -10℃ to 50℃ or humidity changes of RH50%-90%, the release rhythm cannot be adaptively adjusted, resulting in functional failure or excessive release. Summary of the Invention

[0011] (1) Technical issues

[0012] In view of the shortcomings of the existing technology, the present invention provides a physical-environmental dual-trigger deodorizing and fragrance-releasing shoe cabinet based on an essential oil microcapsule controlled-release plate, which achieves the following technical effects:

[0013] 1. Double mechanism trigger release: through physical friction (0.5-3N / cm 2 Stress) works synergistically with ambient temperature and humidity (25-45°C temperature, 50-90% relative humidity) to precisely control the sustained-release rate of essential oils.

[0014] 2. Long-term functional integration: Using core-shell-mesoporous structure microcapsules, the release period of tea tree essential oil is extended to 6-12 months, while achieving the synergy of antibacterial (Staphylococcus aureus inhibition rate >99%), deodorization (isovaleric acid removal rate >85%) and aromatic functions.

[0015] 3. Structural adaptability design: Through removable replacement layers, intelligent sensor modules and wear-resistant coatings, the stability and service life of the shoe cabinet in different usage scenarios are improved.

[0016] (2) Technical solution

[0017] 1. Overall structural design

[0018] like Figure 1-3 As shown, the shoe cabinet includes a cabinet body, cabinet doors and a storage chamber. The core component is the essential oil microcapsule controlled release plate, and its layered structure is as follows:

[0019] ●Base material layer (1): MDF, particle board or plywood (thickness 5-15mm) is used to provide structural support.

[0020] ● Barrier buffer layer (3): composed of polyvinyl acetal resin and nano-silicon dioxide (mass ratio 3:1-5:1), with a thickness of 0.05-0.15mm,

[0021] Prevent organic matter from penetrating into the substrate and enhance interfacial bonding strength.

[0022] ●Surface treatment layer (2): microcapsule coating containing thermosensitive hydrogel (N-isopropylacrylamide-chitosan copolymer), thickness 0.1-0.5mm,

[0023] The microcapsule loading amount is 1%-10% of the total weight of the coating, and the microcapsule particles (3) encapsulating natural tea tree essential oil are uniformly dispersed.

[0024] ● Anti-scratch and wear-resistant layer (4): Gradient cured polyurethane coating (crosslinking density of bottom layer 60-80%, surface layer 40-60%), forming 50-200 lines / mm on the surface 2 The micro-crack network regulates the penetration rate of essential oils and improves wear resistance (pencil hardness ≥ 2H).

[0025] 2. Microcapsule controlled release technology

[0026] ●Microcapsule composition: Gelatin, gum arabic, cyclodextrin as wall material, tea tree essential oil as core material, core-shell-mesoporous

[0027] Structural microcapsules, particle size 10-500μm, compressive strength ≥2.5MPa, mesopore diameter 2-10nm, specific surface area 200-500m 2 / g.

[0028] ● Preparation process (Example 1): a) Preparation of wall material solution: Dissolve gelatin and gum arabic in 50℃ deionized water (1:20

[0029] b) Core material emulsification: After tea tree essential oil and anhydrous ethanol (1:1 volume ratio), slowly add the wall material solution, and emulsify for 30 minutes with magnetic stirring at 800 rpm. The mass ratio of core material to wall material is 1:3; c) Complex coagulation: The pH is adjusted in stages (4.3→3.9→4.6) using a citric acid-disodium hydrogen phosphate buffer system, and the temperature is gradually lowered (40°C→35°C→25°C). Glutaraldehyde solution with a total mass of 1% is added for cross-linking and solidification; d) Solidification collection: Let stand for 2

[0030] After 14 hours, the mixture was centrifuged, washed with deionized water for 3 times, and freeze-dried in a stepwise manner (-20°C / 2h→-50°C / 5h) to obtain microcapsule powder with a porosity of 35%.

[0031] 3. Intelligent trigger system

[0032] The shoe cabinet integrates an environmental adaptive control module:

[0033] ●Sensor module: Temperature and humidity sensor (measurement accuracy: temperature ±0.5°C, humidity ±2% RH) monitors the storage chamber environmental parameters in real time.

[0034] Execution module: A piezoelectric ceramic vibrator (operating frequency 20-100Hz) is linked to a copper-based shape memory alloy vibration transmission rod to enhance friction triggering efficiency through physical vibration.

[0035] ●Control algorithm: The fuzzy PID controller dynamically adjusts the vibration frequency and duration based on temperature and humidity data. When the temperature is detected to be >35°C and the RH>70%, it triggers 40Hz vibration for 5 minutes, increasing the essential oil release by 50%-60%.

[0036] 4. Replaceable structural design

[0037] ● Mortise and tenon buckle: The cabinet side is equipped with a dovetail-shaped slot (depth 3-5mm), and the edge of the removable replacement layer is equipped with a trapezoidal block (inclination 45-60°).

[0038] Combined with silicone-based damping material (Shore hardness 20-40A), it reduces abnormal noise during assembly and disassembly, and improves replacement convenience by 40%.

[0039] ● Friction enhancement pattern: The inner plate or partition surface is provided with wavy grooves (wavelength 2-5mm) and hemispherical protrusions (density 50-200 / cm 2 )

[0040] The combined texture increases the physical friction triggering efficiency by more than 30% compared to smooth surfaces.

[0041] (3) Technical effects

[0042] 1. Release performance comparison

[0043] ● The effective time of traditional aromatherapy patches is ≤30 days at 25℃ and RH60%, while the release half-life of the microcapsule sheet of the present invention is extended to 180 days.

[0044] Long-term effectiveness increased by 6 times.

[0045] The intelligent vibration module can increase the essential oil release rate by 40%-60% in a high humidity environment of 35°C and RH70%, ensuring the effectiveness in a humid environment.

[0046] Energy stability.

[0047] 2. Functional verification data

[0048] ●Antibacterial performance: The inhibition rate against common shoe cabinet bacteria such as Staphylococcus epidermidis and Aspergillus is >95%.

[0049] ●Mechanical properties: The microcapsule coating has been subjected to 5000 friction tests (load 2N / cm 2 ) after the essential oil load loss rate <5%, the wear resistance is obvious

[0050] Significantly better than traditional aromatherapy coatings.

[0051] Environmental adaptability: In the -10℃~50℃ temperature cycle test, the coating showed no cracking or peeling, and functional stability was improved by more than 80%. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 :Microcapsule core-shell-mesoporous structure diagram;

[0053] Figure 2 : Cross-section of the sheet material layer structure (base material layer / barrier layer / surface treatment layer / anti-scratch and wear-resistant layer);

[0054] Figure 3 : Schematic diagram of the assembly of the mortise and tenon buckles of the removable replacement layer and the vibration module. DETAILED DESCRIPTION

[0055] Example 1: Preparation of microcapsule controlled release sheet

[0056] 1. Preparation of wall material solution: Dissolve 10 g of gelatin and 5 g of gum arabic in 200 g of deionized water, heat and stir at 50°C until a transparent solution is obtained. After mixing, add 3.75 g of β-cyclodextrin aqueous solution (1:10 mass ratio) and continue stirring for 30 min to form a homogeneous solution.

[0057] 2. Core material emulsification: Mix 5g of tea tree essential oil with 5g of anhydrous ethanol, slowly drip into the wall material solution, and emulsify with magnetic stirring at 800rpm for 40min. The mass ratio of core material to wall material is 1:3.

[0058] 3. Complex coagulation: add 1 mol / L citric acid solution to adjust the pH to 4.3, cool to 40°C and stir for 1 hour; then adjust the pH to 3.9, cool to 35°C and stir for 30 minutes; finally adjust the pH to 4.6, add 0.15g glutaraldehyde solution (concentration 2%), cool to 25°C and cure for 2 hours.

[0059] 4. Microcapsule collection: After centrifugation (3000 rpm, 10 min), wash three times and freeze-dry at -50°C for 24 h to obtain microcapsule powder with a particle size of 50-100 μm.

[0060] 5. Board coating: 10 g of microcapsules were mixed with 90 g of thermosensitive hydrogel (NIPAM:chitosan = 8:1), and a 0.3 mm thick coating was formed on the surface of the density board by blade coating. After curing at 80 °C for 2 h, two layers of polyurethane wear-resistant layer were sprayed (the bottom layer was cured at 80 °C for 1 h and the surface layer was cured at 50 °C for 2 h).

[0061] Example 2: Intelligent Control Module Test

[0062] 1. Threshold setting: When the temperature and humidity sensor detects that the storage chamber temperature is ≥35°C and the RH is ≥70%, the vibration module is triggered.

[0063] 2. Control logic: The fuzzy PID controller calculates vibration parameters based on real-time temperature and humidity data. The initial frequency is set to 30Hz. When the threshold is exceeded by 1℃, the vibration parameters are calculated.

[0064] / 1% RH, the frequency increases by 2Hz and the duration is extended by 1min (upper limit 100Hz / 10min).

[0065] 3. Effect verification: Under 35℃ and RH75% environment, after the vibration module worked for 5 minutes, the essential oil release increased by 55% compared with the static conditions, and the isovaleric acid removal rate increased from 70% to 88%.

Claims

1. A physical-environmental dual-trigger deodorizing and fragrance-releasing shoe cabinet based on essential oil microcapsule controlled-release plates, characterized in that: It includes a cabinet body and a cabinet panel, wherein the cabinet body and the cabinet panel are assembled from a plurality of essential oil microcapsule panels; The essential oil microcapsule plate comprises a substrate layer (1) and an essential oil microcapsule coating-surface treatment layer (2) coated on the surface of the substrate layer; Microcapsule particles (3) encapsulating natural tea tree essential oil are uniformly dispersed in the surface treatment layer (2); The microcapsule particles (3) have a responsive capsule wall structure, wherein the wall material comprises a gelatin-arabic gum composite layer and a β-cyclodextrin coating layer. When the plate is subjected to a 0.5-3N / cm 2 When the microcapsule wall is subjected to friction stress or is placed in an environment with a temperature of 25-45°C and a relative humidity of 50-90%, the microcapsule wall undergoes controllable rupture to achieve a gradient sustained release of tea tree essential oil; The cabinet side is provided with a detachable essential oil microcapsule plate replacement layer, the replacement layer is connected to the cabinet through a mortise and tenon snap-fit structure, and the surface of the replacement layer is provided with a friction pattern with a depth of 0.1-0.3mm; A barrier buffer layer (4) is provided between the surface treatment layer (2) and the substrate layer (1); the barrier buffer layer (4) is composited from polyvinyl acetal resin and nano-silicon dioxide in a mass ratio of 3:1-5:1, and has a thickness of 0.05-0.15 mm.

2. The deodorizing and fragrance-releasing shoe cabinet according to claim 1, characterized in that: The mass ratio of gelatin to gum arabic in the composite wall material is 3:1-1:3, cyclodextrin accounts for 15-40% of the total wall material mass, the microcapsule particles have a core-shell-mesoporous composite structure, an average particle size of 50-300 μm, and a porosity of 20-45%; the pore size of the mesoporous structure is 2-10 nm, and the specific surface area is 200-500 m 2 / g.

3. The deodorizing and fragrance-releasing shoe cabinet according to claim 2, characterized in that: The preparation steps of the complex coacervation method include: c) The pH was adjusted in stages during the complex coagulation phase: first, the pH was adjusted to 4.2-4.4 and maintained for 10-20 minutes, then to 3.8-4.0 and maintained for 30-60 minutes, and finally to 4.5-4.8 to terminate the reaction. The temperature gradient was controlled at 40°C → 35°C → 25°C, and the pH was adjusted using a citric acid-disodium hydrogen phosphate buffer system. d) During the microcapsule solidification and collection steps, freeze drying was performed using a step-by-step cooling program: in the first stage, the temperature was lowered to -20°C at a rate of 2-5°C / min and maintained for 1-2 hours; in the second stage, the temperature was lowered to -50°C at a rate of 1-2°C / min and maintained for 4-6 hours.

4. The deodorizing and fragrance-releasing shoe cabinet according to claim 1, characterized in that: The mortise and tenon buckle structure comprises: The dovetail-shaped slot (7) is provided on the edge of the cabinet, with a slot depth of 3-5 mm and an opening width of 2.5-4 mm; The trapezoidal block (8) provided at the edge of the replacement layer has an inclination angle of 45-60° and a fitting clearance of 0.1-0.3 mm; The clamping joint is filled with a silicon-based damping material (9) with a Shore hardness of 20-40A.

5. The deodorizing and fragrance-releasing shoe cabinet according to claim 1, characterized in that: The preparation method of the barrier buffer layer (4) comprises: Polyvinyl acetal resin and nano-silica were ultrasonically dispersed in a dimethyl sulfoxide / ethanol = 1:3 (v / v) mixed solvent; Add 0.5-1.5wt% of the total amount of silane coupling agent KH-550; The film is formed by blade coating, and the curing conditions are 80-100℃ hot air drying for 1-2h.

6. The deodorizing and fragrance-releasing shoe cabinet according to claim 1, characterized in that: The anti-scratch and wear-resistant layer is a gradient cured polyurethane coating with a bottom cross-linking density of 60-80% and a surface cross-linking density of 40-60%. The coating surface has a micro-crack network of 0.2-0.5 μm; the density of the micro-crack network is 50-200 per mm 2 , the crack width is 0.1-0.3μm.

7. The deodorizing and fragrance-releasing shoe cabinet according to claim 1, characterized in that: The micro vibration module comprises: The piezoelectric ceramic vibrators (10) are arranged at the four corners of the cabinet and have a resonance frequency of 20-100 Hz; The fuzzy PID controller (11) linked to the temperature and humidity sensor has a response time of 0.5-2s; The vibration energy transmission mechanism adopts a copper-based shape memory alloy vibration transmission rod (12), and its phase change temperature is 30-40°C.

8. The deodorizing and fragrance-releasing shoe cabinet according to claim 1, characterized in that: The concave-convex texture includes: The main friction zone is a wave-shaped groove with a depth of 0.2-0.5mm, a wavelength of 2-5mm, and an amplitude of 0.3-0.8mm; The auxiliary friction area is a hemispherical protrusion with a diameter of 0.5-1mm and a distribution density of 50-200 per cm 2 ; The area ratio of the groove to the protrusion is 3:1-5:1.

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