Capsule type double-layer microcapsule natural vegetable cleaning agent

Abstract

The invention discloses a capsule type double-layer microcapsule natural vegetable cleaning agent and a preparation method thereof. The outer layer of the cleaning agent is a water-soluble wall material, contains corn starch, baking soda and the like, has the particle size of 120-150 microns, and is used for removing water-soluble pesticides. The inner layer is a fat-soluble wall material, contains citric acid, acetic acid and the like, has the particle size of 80-110 microns, is used for decomposing fat-soluble pesticides, and has the overall particle size of 150-200 mm. And after the outer layer is dissolved in water, the inner layer is triggered to slowly release in an alkaline environment, and the outer layer and the inner layer have a synergistic effect, so that water-soluble and fat-soluble pesticides are removed. The cleaning device is suitable for cleaning vegetables and fruits.

Description

Technical Field

[0001] This invention belongs to the field of fruit and vegetable cleaning technology, specifically relating to a natural vegetable cleaner utilizing a double-layer microcapsule structure, and particularly to a technical solution that efficiently removes water-soluble and fat-soluble pesticide residues from the surface of vegetables through the synergistic effect of physical adsorption and chemical decomposition. Background Technology

[0002] Currently, most commercially available vegetable cleaners are chemically synthesized, leaving residues on the surface of vegetables after use, and the wastewater from these cleaners, if discharged untreated, pollutes the environment. Existing single-layer microcapsule cleaners primarily target water-soluble pesticides, with limited removal of fat-soluble pesticides. Multi-layer microcapsule structures have not yet been observed for application in vegetable cleaning; therefore, developing multi-layer microcapsules capable of removing both water-soluble and fat-soluble pesticides is of significant importance. Summary of the Invention

[0003] I. Purpose of the Invention The purpose of this invention is to provide a capsule-type double-layer microcapsule natural vegetable cleaner, the outer layer of which is used to remove water-soluble pesticides and the inner layer of which is used to remove fat-soluble pesticides. The pesticides are removed efficiently through the joint cooperation of the inner and outer layers. Technical solution

[0004] (1) Bilayer microcapsule structure: Outer microcapsules: encapsulated by a water-soluble wall material, comprising (by weight percentage): The formula contains 15-20% corn starch, 5-8% baking soda (sodium bicarbonate), 3-5% chitosan, 2-4% sesame extract, and the remainder is water. The particle size is 120-150 micrometers. It dissolves rapidly in water and removes water-soluble pesticides through physical adsorption and alkaline neutralization.

[0005] Inner microcapsules: Encapsulated by a fat-soluble wall material, comprising (by weight percentage): 10-15% citric acid, 5-8% acetic acid, 3-6% Albizia bark extract, 2-5% plant wax (such as beeswax), with the remainder being organic solvents (such as ethanol). The particle size is 80-110 micrometers. They are slowly released under alkaline conditions, removing fat-soluble pesticides through chemical decomposition.

[0006] (2) Synergistic mechanism: The outer layer dissolves in water, releasing components that adsorb water-soluble pesticides and neutralize alkaline environments.

[0007] The inner layer dissolves under alkaline conditions, releasing acidic components that react with fat-soluble pesticides, decomposing them into harmless substances.

[0008] (3) Preparation method: Step 1: Prepare outer and inner layer microcapsule solutions separately.

[0009] Step 2: Drop the inner layer solution into the outer layer solution and form a double-layer structure by spray drying (temperature 80~100℃, pressure 0.5MPa).

[0010] Step 3: Dry for 10-15 minutes, sieve, and obtain cleaning agent particles with a particle size of 100-200 micrometers.

[0011] Instructions for use: Dissolve in water at a ratio of 1:500, soak vegetables for 5-10 minutes, then rinse.

[0012] III. Technical Effects Dual removal capabilities: Laboratory tests show that the removal rate for common water-soluble pesticides is no less than 85%, and the removal rate for common fat-soluble pesticides is no less than 74%.

[0013] Its main components are natural biodegradable materials, and after degradation, it leaves behind very small amounts of harmless chemicals.

[0014] The double-layer membrane structure overcomes the limitations of the traditional single-layer membrane structure.

[0015] All ingredients are natural extracts or their compounds, and the degradation rate exceeds 98% as determined by GB / T 19276.1-2003.

[0016] The outer layer releases substances to remove water-soluble pesticide residues, while the inner layer releases substances to remove fat-soluble pesticide residues. The synergistic effect of the two processes improves the cleaning effect.

[0017] The product is non-toxic and harmless, and complies with the relevant national food safety regulations GB14930.1-2015. Attached Figure Description

[0018] Figure 1 Preparation process flow chart. Detailed Implementation

[0019] Raw material ratio and preparation Outer microcapsules: Example formula: 18% modified corn starch, 6% baking soda, 4% chitosan, 3% sesame extract, 0.5-2% tea saponin, 0.1-0.5% glucono delta-lactone, and the balance being purified water.

[0020] Preparation: The ingredients are mixed evenly and stirred at high speed to form an emulsion. The outer microcapsules are obtained by spray drying (inlet temperature 90℃, outlet temperature 60℃).

[0021] Inner microcapsules: Example formula: 12% citric acid, 6% acetic acid, 5% Albizia bark extract, 3% mixture of plant waxes and beeswax, with the balance being dehydrated ethanol.

[0022] Auxiliary ingredients: tea saponin 0.5~2%, glucono delta-lactone 0.1~0.5%.

[0023] Preparation: The dissolved components are dissolved in an organic solvent, ultrasonically dispersed, and then encapsulated using microencapsulation technology (such as complex coagulation). After drying, the inner microcapsules are obtained.

[0024] Double-layer structure assembly: The inner microcapsule solution is slowly dripped into the outer solution while stirring. A double-layer structure is formed by spray drying (with the same parameters as above), and particles of the target particle size are obtained by sieving.

[0025] Use Cases Case 1: Washing test on spinach (containing dichlorvos and cypermethrin): Soak for 8 minutes using the cleaning agent of this invention (1:500 ratio).

[0026] Test results: Dichlorvos residue was reduced by 90% (initial concentration 1.2 mg / kg → residue 0.096 mg / kg, at a water temperature of 25℃).

[0027] Cypermethrin residue was reduced by 80% (initial concentration 0.8 mg / kg → residue 0.16 mg / kg, at a water temperature of 25℃).

[0028] Case 2: Comparison with commercially available traditional cleaning agents: Under the same conditions, the removal rate of fat-soluble pesticides by the product of this invention is increased by 35%.

Claims

1. A capsule-type double-layer microcapsule natural vegetable cleaner, characterized in that, It includes an outer microcapsule and an inner microcapsule encapsulating it; The outer microcapsule is formed by encapsulation with a water-soluble wall material, and its contents contain the following components by weight percentage: corn starch 15-20%, baking soda 5-8%, chitosan 3-5%, and sesame extract 2-4%; The inner microcapsules are formed by encapsulation with a fat-soluble wall material, and their contents contain the following components by weight percentage: 10-15% citric acid, 5-8% acetic acid, 3-6% Albizia bark extract, and 2-5% plant wax; The outer microcapsules have a particle size of 120-150 micrometers, the inner microcapsules have a particle size of 80-110 micrometers, and the overall particle size can be 150-200 micrometers.

2. The capsule-type double-layer microcapsule natural vegetable cleaner according to claim 1, characterized in that, The water-soluble wall material is a complex of modified corn starch and chitosan.

3. The capsule-type double-layer microcapsule natural vegetable cleaner according to claim 1, characterized in that, The fat-soluble wall material is a mixture of plant wax and beeswax.

4. The capsule-type double-layer microcapsule natural vegetable cleaner according to any one of claims 1 to 3, characterized in that, It also contains auxiliary ingredients, including 0.5-2% tea saponin and 0.1-0.5% gluconate δ-lactone by weight of the total cleaning agent.

5. A method for preparing a capsule-type double-layer microcapsule natural vegetable cleaner as described in any one of claims 1 to 4, characterized in that, Includes the following steps: S1: Prepare aqueous solutions of the contents of the outer microcapsules and lipid-soluble solutions of the contents of the inner microcapsules, respectively; S2: The contents of the inner microcapsules are encapsulated using a complex coagulation method or a spray drying method to form inner microcapsules; S3: The inner microcapsules are dispersed in an aqueous solution of the contents of the outer microcapsules, and microcapsule particles with a double-layer structure are prepared by spray drying, wherein the inlet temperature of the spray drying is 80-100℃ and the system pressure is 0.5MPa.

6. A method for cleaning fruits and vegetables using a capsule-type double-layer microcapsule natural vegetable cleaner as described in any one of claims 1-4, characterized in that, Includes the following steps: Dissolve the cleaning agent in water at a mass ratio of 1:500 at 25°C to form a cleaning solution; soak the fruits and vegetables to be cleaned in the cleaning solution for 5-10 minutes, then rinse with clean water and drain.

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