CN114960218B - Theanine fabric and preparation method thereof - Google Patents

Theanine fabric and preparation method thereof Download PDF

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Publication number
CN114960218B
CN114960218B CN202210757193.XA CN202210757193A CN114960218B CN 114960218 B CN114960218 B CN 114960218B CN 202210757193 A CN202210757193 A CN 202210757193A CN 114960218 B CN114960218 B CN 114960218B
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theanine
fabric
microcapsules
finishing liquid
coating
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CN114960218A (en
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纪俊玲
谈君婕
汪媛
苏楚清
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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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0068—Polymeric granules, particles or powder, e.g. core-shell particles, microcapsules
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
    • A01N25/28—Microcapsules or nanocapsules
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
    • A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
    • A01N37/46—N-acyl derivatives
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P1/00—Disinfectants; Antimicrobial compounds or mixtures thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P3/00—Fungicides
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C237/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups
    • C07C237/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton
    • C07C237/04—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated
    • C07C237/06—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by amino groups having the carbon atoms of the carboxamide groups bound to acyclic carbon atoms of the carbon skeleton the carbon skeleton being acyclic and saturated having the nitrogen atoms of the carboxamide groups bound to hydrogen atoms or to acyclic carbon atoms
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1671—Resistance to bacteria, mildew, mould, fungi
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

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  • Life Sciences & Earth Sciences (AREA)
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  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Pest Control & Pesticides (AREA)
  • Zoology (AREA)
  • Textile Engineering (AREA)
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  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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Abstract

The invention belongs to the technical field of textile, and particularly relates to a theanine fabric and a preparation method thereof. Weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane crosslinking agent, stirring and mixing uniformly by using a glass rod to prepare microcapsule coating finishing liquid, uniformly coating the coating finishing liquid on fabrics by adopting a dry coating mode, and drying to obtain the antibacterial textile. The invention adopts chitosan and soy protein isolate as wall materials and theanine extract as core materials to prepare theanine microcapsules, the theanine microcapsules are processed on textiles in a coating finishing mode, and then a cross-linking agent is added to endow the antibacterial textiles with excellent washing fastness.

Description

Theanine fabric and preparation method thereof
Technical Field
The invention belongs to the technical field of textile, and particularly relates to a theanine fabric and a preparation method thereof.
Background
Theanine is a common organic substance in tea leaves and is named as N-acetyl-gamma-L-glutamine (N-methyl-gamma-L-glatamine). Theanine is an effective taste substance in green tea. Theanine is contained in dry tea leaves in an amount of about 1 to 2% and the health function of theanine is versatile.
The textile fabric is easy to grow microorganisms such as bacteria and mold in the use process, and the antibacterial textile fabric can not only effectively prevent textiles from being damaged by harmful strains, but also well protect the health of users. The antibacterial functional textile fabric has important practical application significance as a new product for protecting the health of people and reducing disease transmission.
The antibacterial agent for textile mainly comprises: organic antibacterial agent, inorganic antibacterial agent, and natural antibacterial agent. With the enhancement of environmental protection awareness and the popularity of green textiles, the use of natural substances to provide textiles with antibacterial properties is becoming an increasingly attractive option. Under the influence of natural and environmental consciousness, the natural antibacterial agent becomes the first choice for the production of antibacterial textile fabrics in the future. However, the existing natural plant antibacterial fabric has poor water resistance.
Disclosure of Invention
The invention provides a theanine fabric and a preparation method thereof.
The preparation method of the theanine fabric provided by the invention specifically comprises the following steps: weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane cross-linking agent, stirring and mixing uniformly by a glass rod, preparing coating finishing liquid with the mass fraction of 10-30% of the microcapsules, uniformly coating the coating finishing liquid on fabrics by adopting a dry coating mode, pre-drying at 70-80 ℃ for 5-10min, then baking at 110-130 ℃ for 3-5min, washing by deionized water for 3-5 times, and drying at 60-80 ℃ to obtain the antibacterial textile.
The added amount of gelatin is 3% of the total mass of the finishing liquid, and the epoxy silane crosslinking agent is 3% of the total mass of the finishing liquid.
The preparation method of the theanine microcapsule comprises the following steps:
(1) Dissolving soybean protein isolate and chitosan in distilled water with the mass of 5 times, heating and dissolving, and uniformly stirring to obtain a mixed solution serving as a wall material for later use;
wherein the heating temperature is 70-80 ℃, and the mass ratio of the soybean protein to the chitosan is 5-10:2-5.
(2) Adding Tween 80 and sodium dodecyl sulfate into deionized water, stirring for dissolving, adding theanine extract, and mixing to obtain emulsion;
wherein the mass ratio of Tween 80 to sodium dodecyl sulfate is 1:1-3:1, and the sum of the two emulsifying agents is 5% -10% of the total mass of the theanine extract.
The extraction process of theanine extract is as follows:
1) Collecting fresh puer tea leaves, naturally airing in a shade place for standby;
2) Soaking the naturally dried puer tea leaves in the step 1) in warm water to obtain a soaking solution for later use;
wherein, the temperature of warm water soaking is 40-60 ℃ and the soaking time is 5-6h;
3) Carrying out centrifugal precipitation treatment on the soaking solution in the step 2) for later use; the rotational speed of the soaking solution centrifugal precipitation is 6000rpm;
4) Cutting the precipitate obtained after centrifugal precipitation in the step 3), dissolving the precipitate by using ethyl acetate, and filtering the solution to recover supernatant for later use;
the mass ratio of ethyl acetate to precipitate was 25:3, a step of; the dissolution temperature is 40-50 ℃.
5) Heating the supernatant obtained after centrifugal precipitation in the step 3) at 65 ℃ for 2 hours, and cooling at 15 ℃ after heating to obtain cooled supernatant for later use;
6) Combining the supernatant recovered in the step 4) with the supernatant cooled in the step (5), and then concentrating under reduced pressure to obtain a concentrated solution;
the parameters for the reduced pressure concentration were as follows: the pressure and temperature of the reduced pressure were 0.08MPa and 55 MPa, respectively.
7) And (3) subjecting the concentrated solution obtained in the step (6) to column treatment to recover theanine.
(3) Adding the emulsion obtained in the step (2) into the mixed solution obtained in the step (1), rapidly stirring, adding water to adjust the weight content of solid matters to be 10-30%, 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.
Homogenizing under 15-40 MPa for 30 min-2 hr.
(4) And (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the theanine microcapsule.
Wherein, the conditions of spray drying are: the inlet air temperature is 150-160 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
The beneficial effects are that:
according to the invention, chitosan and soy protein isolate are used as wall materials, and theanine extract is used as core material, so that the used materials are environment-friendly;
the theanine microcapsules are treated on the textile by a coating finishing mode, and the excellent washing fastness of the antibacterial textile is provided by adding the cross-linking agent.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1
The extraction process of theanine extract is as follows:
1) Collecting fresh puer tea leaves, naturally airing in a shade place for standby;
2) Soaking the naturally dried puer tea leaves in the step 1) in warm water at 50 ℃ for 6 hours according to the mass ratio of 1:10 to obtain a soaking solution for later use;
3) Carrying out centrifugal precipitation treatment on the soaking solution in the step 2) at 6000rpm for later use;
4) Cutting the precipitate obtained after centrifugal precipitation in the step 3), dissolving the precipitate at 45 ℃ by using ethyl acetate, and filtering the solution to recover supernatant for later use;
the mass ratio of ethyl acetate to precipitate was 25:3.
5) Heating the supernatant obtained after centrifugal precipitation in the step 3) at 65 ℃ for 2 hours, and cooling at 15 ℃ after heating to obtain cooled supernatant for later use;
6) Combining the supernatant recovered in the step 4) with the supernatant cooled in the step (5), and then concentrating under reduced pressure at 0.08MPa and 55 ℃ to obtain a concentrated solution;
7) And (3) subjecting the concentrated solution obtained in the step (6) to column treatment to recover theanine.
Preparation of theanine fabric
(1) Dissolving soybean protein isolate and chitosan in distilled water with the mass ratio of 2:1 and 5 times, heating to 75 ℃ for dissolution, and uniformly stirring to obtain a mixed solution serving as a wall material for later use;
(2) Adding Tween 80 and sodium dodecyl sulfate into deionized water according to the mass ratio of 1:1, stirring and dissolving, adding theanine extract, and mixing uniformly to form emulsion;
the sum of the masses of Tween 80 and sodium dodecyl sulfate is 8% of the total mass of theanine extract.
(3) Adding the emulsion obtained in the step (2) into the mixed solution obtained in the step (1), rapidly stirring, adding water to adjust the weight content of solid matters to 20%, and homogenizing to obtain emulsion;
the mass ratio of theanine extract to wall material in the emulsion is 1:2; the homogenizing pressure was 20MPa and the time was 1h.
(4) And (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the theanine microcapsule.
The conditions for spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
(5) Weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane cross-linking agent, stirring and mixing uniformly by a glass rod, preparing coating finishing liquid with the mass fraction of 20% of the microcapsules, uniformly coating the coating finishing liquid on a fabric by adopting a dry coating mode, pre-baking for 5min at 80 ℃, baking for 4min at 120 ℃, washing by deionized water for 4 times, and drying at 70 ℃ to obtain the antibacterial textile.
The added amount of gelatin is 3% of the total mass of the finishing liquid, and the epoxy silane crosslinking agent is 3% of the total mass of the finishing liquid.
Example 2
The extraction process of theanine extract was the same as in example 1.
Preparation of theanine fabric
(1) Dissolving soybean protein isolate and chitosan in distilled water with the mass ratio of 5:1, heating to 70 ℃ for dissolution, and uniformly stirring to obtain a mixed solution serving as a wall material for later use;
(2) Adding Tween 80 and sodium dodecyl sulfate into deionized water according to the mass ratio of 3:1, stirring and dissolving, adding theanine extract, and mixing uniformly to form emulsion;
the sum of the masses of Tween 80 and sodium dodecyl sulfate is 10% of the total mass of theanine extract.
(3) Adding the emulsion obtained in the step (2) into the mixed solution obtained in the step (1), rapidly stirring, adding water to adjust the weight content of solid matters to 30%, and homogenizing to obtain emulsion;
the mass ratio of theanine extract to wall material in the emulsion is 0.5:2; the homogenizing pressure is 15MPa and the homogenizing time is 1h.
(4) And (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the theanine microcapsule.
The conditions for spray drying were: the air inlet temperature is 150 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
(5) Weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane cross-linking agent, stirring and mixing uniformly by a glass rod, preparing coating finishing liquid with the microcapsule mass fraction of 10%, uniformly coating the coating finishing liquid on a fabric by adopting a dry coating mode, pre-baking for 10min at 75 ℃, baking for 3min at 110 ℃, washing by deionized water for 3 times, and drying at 60 ℃ to obtain the antibacterial textile.
The added amount of gelatin is 3% of the total mass of the finishing liquid, and the epoxy silane crosslinking agent is 3% of the total mass of the finishing liquid.
Example 3
The extraction process of theanine extract was the same as in example 1.
Preparation of theanine fabric
(1) Dissolving soybean protein isolate and chitosan in distilled water with the mass ratio of 5 times that of 1:1, heating to 80 ℃ for dissolution, and uniformly stirring to obtain a mixed solution serving as a wall material for later use;
(2) Adding Tween 80 and sodium dodecyl sulfate into deionized water according to the mass ratio of 2:1, stirring and dissolving, adding theanine extract, and mixing uniformly to form emulsion;
the sum of the masses of Tween 80 and sodium dodecyl sulfate is 5% of the total mass of theanine extract.
(3) Adding the emulsion obtained in the step (2) into the mixed solution obtained in the step (1), rapidly stirring, adding water to adjust the weight content of solid matters to 30%, and homogenizing to obtain emulsion;
the mass ratio of theanine extract to wall material in the emulsion is 0.5:2; the homogenizing pressure was 40MPa and the time was 1h.
(4) And (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the theanine microcapsule.
The conditions for spray drying were: the inlet air temperature is 160 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
(5) Weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane cross-linking agent, stirring and mixing uniformly by a glass rod, preparing coating finishing liquid with the mass fraction of 20% of the microcapsules, uniformly coating the coating finishing liquid on a fabric by adopting a dry coating mode, pre-baking for 5min at 80 ℃, baking for 5min at 110 ℃, washing by deionized water for 5 times, and drying at 70 ℃ to obtain the antibacterial textile.
The added amount of gelatin is 3% of the total mass of the finishing liquid, and the epoxy silane crosslinking agent is 3% of the total mass of the finishing liquid.
Comparative example 1
The extraction process of theanine extract and the preparation method of microcapsules were the same as in example 1.
(4) Weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin, stirring and mixing uniformly by using a glass rod, preparing a coating finishing liquid with the mass fraction of 20% of the microcapsules, uniformly coating the coating finishing liquid on a fabric by adopting a dry coating mode, pre-baking for 5min at 80 ℃, baking for 4min at 120 ℃, washing by deionized water for 4 times, and drying at 70 ℃ to obtain the antibacterial textile.
The addition amount of gelatin is 3% of the total mass of the finishing liquid.
Comparative example 2
The extraction process of theanine extract was the same as in example 1.
Preparation of theanine fabric
(1) Dissolving soybean protein isolate in distilled water with the mass of 5 times, heating to 75 ℃ for dissolution, and uniformly stirring to obtain a mixed solution serving as a wall material for later use;
(2) Adding Tween 80 and sodium dodecyl sulfate into deionized water according to the mass ratio of 1:1, stirring and dissolving, adding theanine extract, and mixing uniformly to form emulsion;
the sum of the masses of Tween 80 and sodium dodecyl sulfate is 8% of the total mass of theanine extract.
(3) Adding the emulsion obtained in the step (2) into the mixed solution obtained in the step (1), rapidly stirring, adding water to adjust the weight content of solid matters to 20%, and homogenizing to obtain emulsion;
the mass ratio of theanine extract to wall material in the emulsion is 1:2; the homogenizing pressure was 20MPa and the time was 1h.
(4) And (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the theanine microcapsule.
The conditions for spray drying were: inlet air temperature 150 ℃, feeding flow rate 21mL/min and spraying air flow rate 667L/h.
(4) Weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane cross-linking agent, stirring and mixing uniformly by a glass rod, preparing coating finishing liquid with the mass fraction of 20% of the microcapsules, uniformly coating the coating finishing liquid on a fabric by adopting a dry coating mode, pre-baking for 5min at 80 ℃, baking for 4min at 120 ℃, washing by deionized water for 4 times, and drying at 70 ℃ to obtain the antibacterial textile.
The added amount of gelatin is 3% of the total mass of the finishing liquid, and the epoxy silane crosslinking agent is 3% of the total mass of the finishing liquid.
Comparative example 3
The extraction process of theanine extract was the same as in example 1.
Preparation of theanine fabric
(1) Dissolving chitosan in distilled water with the mass of 5 times, heating to 75 ℃ for dissolution, and uniformly stirring to obtain a mixed solution serving as a wall material for later use;
(2) Adding Tween 80 and sodium dodecyl sulfate into deionized water according to the mass ratio of 1:1, stirring and dissolving, adding theanine extract, and mixing uniformly to form emulsion;
the sum of the masses of Tween 80 and sodium dodecyl sulfate is 8% of the total mass of theanine extract.
(3) Adding the emulsion obtained in the step (2) into the mixed solution obtained in the step (1), rapidly stirring, adding water to adjust the weight content of solid matters to 20%, and homogenizing to obtain emulsion;
the mass ratio of theanine extract to wall material in the emulsion is 1:2; the homogenizing pressure was 20MPa and the time was 1h.
(4) And (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the theanine microcapsule.
The conditions for spray drying were: inlet air temperature 150 ℃, feeding flow rate 21mL/min and spraying air flow rate 667L/h.
(4) Weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane cross-linking agent, stirring and mixing uniformly by a glass rod, preparing coating finishing liquid with the mass fraction of 20% of the microcapsules, uniformly coating the coating finishing liquid on a fabric by adopting a dry coating mode, pre-baking for 5min at 80 ℃, baking for 4min at 120 ℃, washing by deionized water for 4 times, and drying at 70 ℃ to obtain the antibacterial textile.
The added amount of gelatin is 3% of the total mass of the finishing liquid, and the epoxy silane crosslinking agent is 3% of the total mass of the finishing liquid.
The testing method comprises the following steps:
FZ/T73023-2006 antibacterial knitwear annex C antibacterial fabric sample washing test method
Part 3 of the evaluation of the antimicrobial properties of GB/T20944.3-2008 textiles, shaking method
And (3) antibacterial effect evaluation: the antibacterial rate of staphylococcus aureus and escherichia coli is more than or equal to 70 percent, or the antibacterial rate of candida albicans is more than or equal to 60 percent, and the sample has antibacterial effect.
Table 1 antibacterial property test

Claims (7)

1. The theanine fabric is characterized in that: the preparation method of the fabric comprises the following steps: weighing theanine microcapsules, dispersing the theanine microcapsules by deionized water, adding thickener gelatin and epoxy silane cross-linking agent, stirring and mixing uniformly by a glass rod to prepare microcapsule coating finishing liquid, uniformly coating the coating finishing liquid on fabrics by adopting a dry coating mode, pre-baking for 5-10min at 70-80 ℃, baking for 3-5min at 110-130 ℃, washing for 3-5 times by deionized water, and drying at 60-80 ℃ to obtain the antibacterial textile;
the addition amount of the gelatin is 3% of the total mass of the finishing liquid, and the addition amount of the epoxy silane crosslinking agent is 3% of the total mass of the finishing liquid; the mass fraction of the microcapsule coating finishing liquid is 10-30%;
the preparation method of the theanine microcapsule comprises the following specific steps:
(1) Dissolving soybean protein isolate and chitosan in distilled water with the mass of 5 times, heating and dissolving, and uniformly stirring to obtain a mixed solution serving as a wall material for later use;
(2) Adding Tween 80 and sodium dodecyl sulfate into deionized water, stirring for dissolving, adding theanine extract, and mixing to obtain emulsion;
(3) Adding the emulsion obtained in the step (2) into the mixed solution obtained in the step (1), rapidly stirring, adding water to adjust the weight content of solid matters to be 10-30%, and homogenizing; and (3) carrying out spray drying on the homogenized emulsion in a dryer by using an atomizer to obtain the theanine microcapsule.
2. The theanine fabric of claim 1, wherein: the heating temperature of the step (1) is 70-80 ℃, and the mass ratio of the soybean protein to the chitosan is 5-10:2-5.
3. The theanine fabric of claim 1, wherein: the mass ratio of Tween 80 to sodium dodecyl sulfonate in the step (2) is 1:1-3:1, and the sum of the mass of the two emulsifying agents is 5-10% of the total mass of the theanine extract.
4. The theanine fabric of claim 1, wherein: the extraction process of the theanine extract in the step (2) is as follows:
1) Collecting fresh puer tea leaves, naturally airing in a shade place for standby;
2) Soaking the naturally dried puer tea leaves in the step 1) in warm water to obtain a soaking solution for later use;
3) Carrying out centrifugal precipitation treatment on the soaking solution in the step 2) for later use, wherein the rotating speed of centrifugal precipitation is 6000rpm;
4) Cutting the precipitate obtained after centrifugal precipitation in the step 3), dissolving the precipitate at 45 ℃ by using ethyl acetate, and filtering the solution to recover supernatant for later use; the mass ratio of ethyl acetate to precipitate was 25:3, a step of;
5) Heating the supernatant obtained after centrifugal precipitation in the step 3) at 65 ℃ for 2 hours, and cooling at 15 ℃ after heating to obtain cooled supernatant for later use;
6) Combining the supernatant recovered in the step 4) and the supernatant cooled in the step (5), and then concentrating under reduced pressure of 0.08MPa to obtain a concentrated solution; the decompression temperature is 55 ℃;
7) And (3) subjecting the concentrated solution obtained in the step (6) to column treatment to recover theanine.
5. The theanine fabric of claim 4, wherein: the temperature of the warm water soaking in the step 2) is 40-60 ℃, and the soaking time is 5-6h.
6. The theanine fabric of claim 1, wherein: the mass ratio of the emulsion to the mixed solution in the step (3) is 0.5-1:2, the homogenizing pressure is 15-40 MPa, and the time is 30 min-2 h.
7. The theanine fabric of claim 1, wherein: the spray drying conditions of step (3) are: the air inlet temperature is 150-160 ℃, the feeding flow is 21mL/min, and the spraying air flow is 667L/h.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103147311A (en) * 2013-04-07 2013-06-12 江苏悦达纺织集团有限公司 Tea tree oil microcapsule antibacterial healthcare fiber and preparation method thereof
CN106665658A (en) * 2016-11-22 2017-05-17 汪逸凡 Preparation method for microencapsulated biopesticide
CN112522957A (en) * 2020-12-01 2021-03-19 杭州英诺克新材料有限公司 Capsule, fabric containing capsule, preparation method and application thereof
WO2021202413A1 (en) * 2020-03-30 2021-10-07 Ojai Energetics Pbc Systems, methods, and compositions for infections
CN113548976A (en) * 2021-08-18 2021-10-26 广州妙思生物科技有限公司 Theanine extraction process
CN114108316A (en) * 2021-12-13 2022-03-01 罗莱生活科技股份有限公司 Preparation method of antibacterial textile and antibacterial textile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103147311A (en) * 2013-04-07 2013-06-12 江苏悦达纺织集团有限公司 Tea tree oil microcapsule antibacterial healthcare fiber and preparation method thereof
CN106665658A (en) * 2016-11-22 2017-05-17 汪逸凡 Preparation method for microencapsulated biopesticide
WO2021202413A1 (en) * 2020-03-30 2021-10-07 Ojai Energetics Pbc Systems, methods, and compositions for infections
CN112522957A (en) * 2020-12-01 2021-03-19 杭州英诺克新材料有限公司 Capsule, fabric containing capsule, preparation method and application thereof
CN113548976A (en) * 2021-08-18 2021-10-26 广州妙思生物科技有限公司 Theanine extraction process
CN114108316A (en) * 2021-12-13 2022-03-01 罗莱生活科技股份有限公司 Preparation method of antibacterial textile and antibacterial textile

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