CN112121739A - Preparation method of plant antibacterial microcapsule - Google Patents

Preparation method of plant antibacterial microcapsule Download PDF

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Publication number
CN112121739A
CN112121739A CN202011040806.5A CN202011040806A CN112121739A CN 112121739 A CN112121739 A CN 112121739A CN 202011040806 A CN202011040806 A CN 202011040806A CN 112121739 A CN112121739 A CN 112121739A
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cellulose
nano
mass
plant
protein isolate
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纪俊玲
汪媛
谈君婕
彭勇刚
何叶丽
张聪
戴萍
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Changzhou Mysun Biological Materials Co ltd
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Changzhou Mysun Biological Materials Co ltd
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02—Making microcapsules or microballoons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02—Making microcapsules or microballoons
    • B01J13/04—Making microcapsules or microballoons by physical processes, e.g. drying, spraying
    • B01J13/043—Drying and spraying
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Abstract

The invention belongs to the field of new materials, and particularly relates to a preparation method of a plant antibacterial microcapsule. The composite plant extract of the houttuynia cordata, the isatis root and the maca is extracted by a supercritical extraction method to serve as an antibacterial component, decomposition and volatilization of thermosensitive components are avoided, the obtained microcapsule is good in sterilization and bacteriostasis effects, and the Arabic resin, the nano-cellulose modified soybean protein and the maltodextrin are compounded to serve as wall materials of the microcapsule, so that the microcapsule has good mechanical properties and controlled release capacity, the plant extract can be better protected, and the purpose of regulating and controlling release is achieved.

Description

Preparation method of plant antibacterial microcapsule
Technical Field
The invention belongs to the field of new materials, and particularly relates to a preparation method of a plant antibacterial microcapsule.
Background
The textile is easy to breed bacteria, mould and other microorganisms in the using process, and the antibacterial textile not only can effectively prevent the textile from being invaded by harmful strains, but also can well protect the health of a user. The antibacterial functional textile has important practical application significance as a new product which can protect the health of people and reduce the spread of diseases.
Antibacterial agents for textiles are mainly: organic antibacterial agent, inorganic antibacterial agent, and natural antibacterial agent. The main varieties of organic antibacterial agents are as follows: organosilicone ammonium salts, phenol ethers, phenols, biguanides, isothiazoles, pyrroles, organometallics, imidazoles, pyridines, thiazoles and the like. The antibacterial agent has the advantages of high sterilization speed, strong sterilization capability, convenient processing, good color stability and the like. But has the defects of poor heat resistance, easy precipitation in a solvent environment, easy generation of drug resistance, toxic decomposition products and the like. The main varieties of inorganic antibacterial agents: silver zeolite, silver activated carbon, silver silica gel, silver glass beads, silver hydroxyapatite antibacterial agents and the like, and the silver ion antibacterial agent has the advantages of high antibacterial activity, good safety, good heat resistance and the like. But also has the defects of easy color change, difficult manufacture, high cost, poor antifungal and mildew resistant effect and the like.
With the enhancement of environmental awareness and the popularity of green textiles, the attention of people is increasing to make textiles have antibacterial performance by utilizing natural substances. Under the influence of returning to nature and environmental consciousness, the natural antibacterial agent becomes the first choice for the future antibacterial textile production. One of the main methods currently used for treating fabrics with natural antimicrobial agents is microencapsulation. The technology is that active ingredients of one or more natural antibacterial extracts are wrapped in micro-particle capsules and then fixed in fibers of fabrics, so that the health care fabrics are formed. However, there are problems of a high release rate and a short duration.
Disclosure of Invention
The invention aims to provide a preparation method of a slow-release long-acting plant antibacterial microcapsule, which comprises the following steps:
(1) weighing nano-cellulose and sodium dodecyl sulfate, adding into a container, and mechanically stirring for 15 minutes at room temperature to obtain activated nano-cellulose;
wherein the dosage of the sodium dodecyl sulfate is 1-3% of the mass of the nano-cellulose.
(2) Dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion; dispersing the activated nano-cellulose in absolute ethyl alcohol with the mass 6 times that of the nano-cellulose to obtain nano-cellulose dispersion liquid; mixing the soy protein isolate dispersion liquid and the nano-cellulose dispersion liquid, performing ultrasonic dispersion, and uniformly stirring to obtain a modified soy protein isolate dispersion liquid;
wherein the mass ratio of the activated nano-cellulose to the soybean protein isolate is as follows: 2-5:100.
(3) Dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the modified soybean protein dispersion liquid and maltodextrin, uniformly stirring to obtain a mixed liquid, and adjusting the temperature to 70-80 ℃ to serve as a wall material for later use;
wherein the mass ratio of the Arabic resin to the maltodextrin to the modified soybean protein is 2-5:1-3: 5-10.
(4) Dissolving an emulsifier in water, heating and dispersing, adding a core material into the water, and mixing and uniformly mixing to form an emulsion;
wherein, the emulsifier adopts sucrose ester, and the mass ratio of the core material to the sucrose ester is 100: 2-5;
the core material is a composite plant extract composed of houttuynia cordata, isatis root and maca;
the extraction process of the composite plant extract comprises the following steps:
A. pulverizing herba Houttuyniae, radix Isatidis, and Lepidium Meyenii Walp to obtain plant mixture;
B. adding ethanol into the crushed plant mixture, grinding, and sieving by using a 150-mesh sieve;
C. adding the undersize powder into a carbon dioxide extraction instrument, and extracting for 1-3 hours at 30-50 ℃;
D. gasifying the extract in a separation zone, and separating carbon dioxide to obtain a compound plant extract;
wherein the mass ratio of the houttuynia cordata to the isatis root to the maca is 1:1:1-1:1: 3.
(5) Adding the emulsion obtained in the step (4) into the mixed solution obtained in the step (3), quickly stirring, adding water to adjust the solid content to be 10-30% by weight, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 0.5-1: 2.
The homogenizing pressure is 15-40 MPa, and the time is 30 min-2 h.
(6) And (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the plant antibacterial microcapsule.
Wherein, the spray drying conditions are as follows: the inlet air temperature is 150-.
Advantageous effects
(1) The method adopts the Arabic resin, the maltodextrin and the soybean protein isolate as wall materials and the heartleaf houttuynia herb, the indigowoad root and the maca compound plant extract as core materials, and the used materials are green and environment-friendly.
(2) The maltodextrin has a certain inclusion effect on the core material, the soybean protein isolate is modified by adopting the nano-cellulose, and the capsule wall obtained by combining the arabian resin has better mechanical property and controlled release capability, so that the plant extract can be better protected, and the purpose of regulating and controlling the release is achieved.
(3) The compound plant extract is extracted by a supercritical extraction method, so that the decomposition and volatilization of thermosensitive components are avoided, and the sterilization and bacteriostasis effects of the microcapsule are better.
Detailed Description
The present invention is further described below with reference to examples, but is not limited thereto.
Example 1
A carbon dioxide supercritical extraction method is adopted to extract the composite plant extract, and the specific process is as follows:
A. crushing sun-dried houttuynia cordata, isatis root and maca according to the mass ratio of 1:1:2 to obtain a plant mixture;
B. adding ethanol into the crushed plant mixture, grinding, and sieving by using a 150-mesh sieve;
C. adding the undersize powder into a carbon dioxide extractor, and extracting for 5 hours at 30 ℃;
D. gasifying the extract in a separation zone, and separating carbon dioxide to obtain the compound plant extract.
The preparation method of the plant antibacterial microcapsule comprises the following steps:
(1) weighing nano-cellulose and sodium dodecyl sulfate, adding into a container, and mechanically stirring for 15 minutes at room temperature to obtain activated nano-cellulose; wherein the using amount of the sodium dodecyl sulfate is 2 percent of the mass of the nano-cellulose;
(2) dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion; dispersing the activated nano-cellulose in absolute ethyl alcohol with the mass 6 times that of the nano-cellulose to obtain nano-cellulose dispersion liquid; mixing the soy protein isolate dispersion liquid and the nano-cellulose dispersion liquid, performing ultrasonic dispersion, and uniformly stirring to obtain a modified soy protein isolate dispersion liquid;
wherein the mass ratio of the activated nano-cellulose to the soybean protein isolate is as follows: 3:100.
(3) Dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the modified soybean protein dispersion liquid and maltodextrin, uniformly stirring to obtain a mixed liquid, and adjusting the temperature to 75 ℃ to serve as a wall material for later use;
wherein the mass ratio of the Arabic resin to the maltodextrin to the modified soybean protein is 3:2: 8.
(4) Dissolving sucrose ester in water, heating for dispersion, adding core material, mixing, and forming emulsion; the sucrose ester accounts for 3% of the mass of the composite plant extract.
(5) Adding the emulsion obtained in the step (4) into the mixed solution obtained in the step (3), quickly stirring, adding water to adjust the solid content to 20%, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 1: 2.
The homogenizing pressure is 20MPa, and the time is 1 h.
(6) Spray drying the homogenized emulsion in a dryer by using an atomizer to obtain plant antibacterial microcapsules; the conditions of the spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
Example 2
In the process of extracting the composite plant extract, the mass ratio of the sun-dried houttuynia cordata, the isatis root and the maca is 1:1:1, and the specific extraction method is the same as that in example 1.
The preparation method of the plant antibacterial microcapsule comprises the following steps:
(1) weighing nano-cellulose and sodium dodecyl sulfate, adding into a container, and mechanically stirring for 15 minutes at room temperature to obtain activated nano-cellulose; wherein the using amount of the sodium dodecyl sulfate is 1 percent of the mass of the nano-cellulose;
(2) dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion; dispersing the activated nano-cellulose in absolute ethyl alcohol with the mass 6 times that of the nano-cellulose to obtain nano-cellulose dispersion liquid; mixing the soy protein isolate dispersion liquid and the nano-cellulose dispersion liquid, performing ultrasonic dispersion, and uniformly stirring to obtain a modified soy protein isolate dispersion liquid;
wherein the mass ratio of the activated nano-cellulose to the soybean protein isolate is as follows: 2:100.
(3) Dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the modified soybean protein dispersion liquid and maltodextrin, uniformly stirring to obtain a mixed liquid, and adjusting the temperature to 75 ℃ to serve as a wall material for later use;
wherein the mass ratio of the Arabic resin to the maltodextrin to the modified soybean protein is 2:1: 5.
(4) Dissolving sucrose ester in water, heating for dispersion, adding core material, mixing, and forming emulsion; the sucrose ester accounts for 2% of the mass of the composite plant extract.
(5) Adding the emulsion obtained in the step (4) into the mixed solution obtained in the step (3), quickly stirring, adding water to adjust the solid content to 20%, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 0.5: 2.
The homogenizing pressure is 20MPa, and the time is 1 h.
(6) Spray drying the homogenized emulsion in a dryer by using an atomizer to obtain plant antibacterial microcapsules; the conditions of the spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
Example 3
The extraction method of the composite plant extract is the same as that of example 1.
The preparation method of the plant antibacterial microcapsule comprises the following steps:
(1) weighing nano-cellulose and sodium dodecyl sulfate, adding into a container, and mechanically stirring for 15 minutes at room temperature to obtain activated nano-cellulose; wherein the using amount of the sodium dodecyl sulfate is 3 percent of the mass of the nano-cellulose;
(2) dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion; dispersing the activated nano-cellulose in absolute ethyl alcohol with the mass 6 times that of the nano-cellulose to obtain nano-cellulose dispersion liquid; mixing the soy protein isolate dispersion liquid and the nano-cellulose dispersion liquid, performing ultrasonic dispersion, and uniformly stirring to obtain a modified soy protein isolate dispersion liquid;
wherein the mass ratio of the activated nano-cellulose to the soybean protein isolate is as follows: 5:100.
(3) Dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the modified soybean protein dispersion liquid and maltodextrin, uniformly stirring to obtain a mixed liquid, and adjusting the temperature to 80 ℃ to serve as a wall material for later use;
wherein the mass ratio of the Arabic resin to the maltodextrin to the modified soybean protein is 5:2: 10.
(4) Dissolving sucrose ester in water, heating for dispersion, adding core material, mixing, and forming emulsion; the sucrose ester accounts for 5% of the mass of the composite plant extract.
(5) Adding the emulsion obtained in the step (4) into the mixed solution obtained in the step (3), quickly stirring, adding water to adjust the solid content to 20%, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 1: 2.
The homogenizing pressure is 20MPa, and the time is 1 h.
(6) Spray drying the homogenized emulsion in a dryer by using an atomizer to obtain plant antibacterial microcapsules; the conditions of the spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
Example 4
In the process of extracting the composite plant extract, the mass ratio of the sun-dried houttuynia cordata, the isatis root and the maca is 1:1:3, and the extraction conditions are as follows: the extraction is carried out for 2h at 50 ℃, and the specific extraction method is the same as that of example 1.
The preparation method of the plant antibacterial microcapsule comprises the following steps:
(1) weighing nano-cellulose and sodium dodecyl sulfate, adding into a container, and mechanically stirring for 15 minutes at room temperature to obtain activated nano-cellulose; wherein the using amount of the sodium dodecyl sulfate is 2 percent of the mass of the nano-cellulose;
(2) dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion; dispersing the activated nano-cellulose in absolute ethyl alcohol with the mass 6 times that of the nano-cellulose to obtain nano-cellulose dispersion liquid; mixing the soy protein isolate dispersion liquid and the nano-cellulose dispersion liquid, performing ultrasonic dispersion, and uniformly stirring to obtain a modified soy protein isolate dispersion liquid;
wherein the mass ratio of the activated nano-cellulose to the soybean protein isolate is as follows: 3:100.
(3) Dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the modified soybean protein dispersion liquid and maltodextrin, uniformly stirring to obtain a mixed liquid, and adjusting the temperature to 80 ℃ to serve as a wall material for later use;
wherein the mass ratio of the Arabic resin to the maltodextrin to the modified soybean protein is 3:2: 6.
(4) Dissolving sucrose ester in water, heating for dispersion, adding core material, mixing, and forming emulsion; the sucrose ester accounts for 4% of the mass of the composite plant extract.
(5) Adding the emulsion obtained in the step (4) into the mixed solution obtained in the step (3), quickly stirring, adding water to adjust the solid content to be 30% by weight, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 0.8: 2.
The homogenizing pressure is 15MPa, and the time is 1.5 h.
(6) Spray drying the homogenized emulsion in a dryer by using an atomizer to obtain plant antibacterial microcapsules; the conditions of the spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
Comparative example 1
The extraction method of the compound plant extract comprises the following steps:
putting the houttuynia cordata, the isatis root and the maca into water according to the mass ratio of 1:1:2, wherein the weight ratio of the mixed plant materials to the water is 20: 100, respectively; soaking at 70 deg.C for 5 hr; then processing for 1 hour in an ultrasonic machine at 70 ℃, and filtering to obtain a composite plant extract;
the preparation method of the plant antibacterial microcapsule is the same as that of example 1.
Comparative example 2
The extraction method of the composite plant extract is the same as that of example 1.
The preparation method of the plant antibacterial microcapsule comprises the following steps:
(1) weighing nano-cellulose and sodium dodecyl sulfate, adding into a container, and mechanically stirring for 15 minutes at room temperature to obtain activated nano-cellulose; wherein the using amount of the sodium dodecyl sulfate is 2 percent of the mass of the nano-cellulose;
(2) dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion; dispersing the activated nano-cellulose in absolute ethyl alcohol with the mass 6 times that of the nano-cellulose to obtain nano-cellulose dispersion liquid; mixing the soy protein isolate dispersion liquid and the nano-cellulose dispersion liquid, performing ultrasonic dispersion, and uniformly stirring to obtain a modified soy protein isolate dispersion liquid;
wherein the mass ratio of the activated nano-cellulose to the soybean protein isolate is as follows: 3:100.
(3) Dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the modified soybean protein dispersion liquid, uniformly stirring to obtain a mixed solution, and adjusting the temperature to 75 ℃ to be used as a wall material for later use;
wherein the mass ratio of the Arabic resin to the modified soybean protein is 5: 8.
(4) Dissolving sucrose ester in water, heating for dispersion, adding core material, mixing, and forming emulsion; the sucrose ester accounts for 3% of the mass of the composite plant extract.
(5) Adding the emulsion obtained in the step (4) into the mixed solution obtained in the step (3), quickly stirring, adding water to adjust the solid content to 20%, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 1: 2.
The homogenizing pressure is 20MPa, and the time is 1 h.
(6) Spray drying the homogenized emulsion in a dryer by using an atomizer to obtain plant antibacterial microcapsules; the conditions of the spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
Comparative example 3
The extraction method of the composite plant extract is the same as that of example 1.
(1) Dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding maltodextrin, uniformly stirring to obtain a mixed solution, and adjusting the temperature to 75 ℃ to be used as a wall material for later use;
wherein the mass ratio of the Arabic resin to the maltodextrin is 5: 8.
(4) Dissolving sucrose ester in water, heating for dispersion, adding core material, mixing, and forming emulsion; the sucrose ester accounts for 3% of the mass of the composite plant extract.
(5) Adding the emulsion obtained in the step (4) into the mixed solution obtained in the step (3), quickly stirring, adding water to adjust the solid content to 20%, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 1: 2.
The homogenizing pressure is 20MPa, and the time is 1 h.
(6) Spray drying the homogenized emulsion in a dryer by using an atomizer to obtain plant antibacterial microcapsules; the conditions of the spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
Comparative example 4
The extraction method of the composite plant extract is the same as that of example 1.
The preparation method of the plant antibacterial microcapsule comprises the following steps:
(1) dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion;
(2) dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the soybean protein dispersion liquid and maltodextrin, uniformly stirring to obtain a mixed solution, and adjusting the temperature to 75 ℃ to be used as a wall material for later use;
wherein the mass ratio of the Arabic resin to the maltodextrin to the soybean protein is 3:2: 8.
(3) Dissolving sucrose ester in water, heating for dispersion, adding core material, mixing, and forming emulsion; the sucrose ester accounts for 3% of the mass of the composite plant extract.
(4) Adding the emulsion obtained in the step (3) into the mixed solution obtained in the step (2), quickly stirring, adding water to adjust the solid content to 20%, and homogenizing;
wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution is 1: 2.
The homogenizing pressure is 20MPa, and the time is 1 h.
(5) Spray drying the homogenized emulsion in a dryer by using an atomizer to obtain plant antibacterial microcapsules; the conditions of the spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
Example 5
Preparing an antibacterial microcapsule finished fabric: weighing the antibacterial microcapsules obtained by the invention, dispersing in water, preparing a solution with the mass fraction of 20%, adding a small amount of polyacrylate adhesive, wherein the adhesive accounts for 5% of the total mass of the system, soaking the pure cotton fabric in the solution, taking out the pure cotton fabric after 2min, rolling the fabric by using a roller, and drying the fabric at 80 ℃ for 5min, and then drying the fabric at 110 ℃ for 3 min.
Antibacterial and bacteriostatic properties: the method is carried out according to a 5.1.1 suspension quantitative antibacterial test and a 5.2.1 suspension quantitative antibacterial test in a standard WST 650-plus 2019 antibacterial and antibacterial effect evaluation method, wherein the test concentration is 1%.
TABLE 1 antibacterial Properties test
Figure BDA0002706580670000111
TABLE 2 Sterilization Properties test
Figure BDA0002706580670000112
Figure BDA0002706580670000121
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.

Claims (10)

1. A preparation method of plant antibacterial microcapsules is characterized by comprising the following steps:
(1) weighing nano-cellulose and sodium dodecyl sulfate, adding into a container, and mechanically stirring for 15 minutes at room temperature to obtain activated nano-cellulose;
(2) dispersing soy protein isolate in distilled water with 4 times of the mass at 60 ℃ to obtain soy protein isolate dispersion; dispersing the activated nano-cellulose in absolute ethyl alcohol with the mass 6 times that of the nano-cellulose to obtain nano-cellulose dispersion liquid; mixing the soy protein isolate dispersion liquid and the nano-cellulose dispersion liquid, performing ultrasonic dispersion, and uniformly stirring to obtain a modified soy protein isolate dispersion liquid;
(3) dissolving Arabic resin in distilled water with the mass 5 times that of the Arabic resin, heating to dissolve the Arabic resin, adding the modified soybean protein dispersion liquid and maltodextrin, uniformly stirring to obtain a mixed solution, and adjusting the temperature to be 70-80 ℃ to serve as a wall material for later use;
(4) dissolving an emulsifier in water, heating and dispersing, adding a core material into the water, and mixing and uniformly mixing to form an emulsion; wherein the core material is a composite plant extract composed of herba Houttuyniae, radix Isatidis, and Lepidium Meyenii Walp;
(5) adding the emulsion obtained in the step (4) into the solution obtained in the step (3), quickly stirring, adding water to adjust the weight content of the solid matters to 10-30%, and homogenizing;
(6) and (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the plant antibacterial microcapsule.
2. The method for preparing plant antibacterial microcapsules according to claim 1, wherein the amount of the sodium lauryl sulfate used in step (1) is 1-3% of the mass of the nanocellulose.
3. The method for preparing plant antibacterial microcapsules according to claim 1, wherein the mass ratio of the nanocellulose to the soybean protein isolate in step (2) is: 2-5:100.
4. The method for preparing plant antibacterial microcapsules according to claim 1, wherein the mass ratio of the arabic resin, the maltodextrin and the modified soy protein in the step (3) is 2-5:1-3: 5-10.
5. The preparation method of plant antibacterial microcapsules of claim 1, wherein the emulsifier in step (4) is sucrose ester, and the mass ratio of the core material to the sucrose ester is 100: 2-5.
6. The method for preparing plant antibacterial microcapsules according to claim 1, wherein the extraction process of the composite plant extract in step (4) is as follows:
A. pulverizing herba Houttuyniae, radix Isatidis, and Lepidium Meyenii Walp to obtain plant mixture;
B. adding ethanol into the crushed plant mixture, grinding, and sieving by using a 150-mesh sieve;
C. adding the undersize powder into a carbon dioxide extraction instrument, and extracting for 1-3 hours at 30-50 ℃;
D. gasifying the extract in a separation zone, and separating carbon dioxide to obtain a compound plant extract;
wherein the mass ratio of the houttuynia cordata to the isatis root to the maca is 1:1:1-1:1: 3.
7. The method for preparing plant antibacterial microcapsules according to claim 1, wherein the mass ratio of the core material in the emulsion to the wall material in the mixed solution in the step (5) is 0.5-1: 2.
8. The method for preparing plant antibacterial microcapsules according to claim 1, wherein the homogenization pressure in the step (5) is 15-40 MPa, and the time is 30 min-2 h.
9. The process for preparing plant antibacterial microcapsules according to claim 1, wherein the spray-drying conditions of step (6) are: the inlet air temperature is 150-.
10. A plant antibacterial microcapsule prepared according to the method of claim 1.
CN202011040806.5A 2020-09-28 2020-09-28 Preparation method of plant antibacterial microcapsule Pending CN112121739A (en)

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CN115104605A (en) * 2022-06-21 2022-09-27 浙江升华云峰新材股份有限公司 Compound natural plant extract synergistic antibacterial antiviral multi-shell microcapsule and preparation method and application thereof

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CN106982825A (en) * 2017-05-08 2017-07-28 海南热带海洋学院 A kind of antibacterial microcapsule and preparation method thereof and anti-bacterial packaging film
CN107455492A (en) * 2017-08-07 2017-12-12 西南林业大学 A kind of method that nano-silicon dioxide modified microcapsule wall material prepares microcapsules

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CN106983138A (en) * 2017-04-17 2017-07-28 江西省食品发酵研究所 The Microencapsulation Method of maca ferment microencapsulated products and maca ferment
CN106982825A (en) * 2017-05-08 2017-07-28 海南热带海洋学院 A kind of antibacterial microcapsule and preparation method thereof and anti-bacterial packaging film
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* Cited by examiner, † Cited by third party
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