Camellia extract-containing microcapsule, fabric and preparation method and application thereof

Abstract

The invention relates to the technical field of functional finishing of textile fabrics, in particular to a microcapsule containing a camellia extract, a fabric and a preparation method and application of the microcapsule and the fabric. The preparation method of the microcapsule containing the camellia extract comprises the following steps: adding fatty alcohol-polyoxyethylene ether into a solution containing glacial acetic acid and chitosan, and stirring to obtain a mixed solution A; adding a solution containing the camellia extract into the mixed solution A to obtain a mixed solution B; and dropwise adding an aqueous solution of sodium tripolyphosphate into the mixed solution B, stirring to obtain a solution containing a microcapsule shell, and carrying out suction filtration and drying to obtain the microcapsule containing the camellia extract. The camellia extract is effectively coated to prepare the microcapsule containing the camellia extract, so that the problem that the camellia essential oil is easy to volatilize, insoluble in water and not suitable for finishing and processing of textiles under a high-temperature condition is solved; and the microcapsule prepared by the method can continuously release the camellia extract.

Description

Technical Field

[0001] The invention relates to the technical field of functional finishing of textile fabrics, and in particular to microcapsules containing camellia extracts, fabrics, and preparation methods and applications thereof. Background Art

[0002] Camellia, also known as camellia, or simply camellia, is a plant of the genus Camellia in the Theaceae family. It is cherished by the world's horticultural community for its beautiful plant shape and colorful flowers. It is a traditional ornamental flower and one of the world's precious flowers and trees. Camellia contains rich flavonoids, saponins, and polyphenol compounds, and has excellent antioxidant and anti-free radical effects. The cosmetics prepared from it have the effects of anti-free radicals, anti-aging, spot lightening, moisturizing, and sun protection.

[0003] Camellia essential oil extract contains a large amount of antioxidants, which can help resist the damage of free radicals to the skin, thereby slowing down the aging of the skin. It also has a certain moisturizing and nourishing effect on the skin, which is beneficial to skin health. In addition, camellia essential oil also has a fresh and fragrant smell. After use, it can help relieve tension, anxiety, stress and other negative emotions, thereby helping to relax the body and mind and improve emotional state. In addition, this type of essential oil also has a calming and soothing effect, which can help patients improve insomnia, dreaminess and other sleep problems, thereby improving sleep quality.

[0004] Natural camellia essential oil has excellent antioxidant properties, but it is volatile at high temperatures and difficult to dissolve in water, making it unsuitable for textile finishing. Existing camellia essential oil applications in the field of textile finishing are mostly in the form of fabric fibers being impregnated with essential oil, which evaporates quickly and cannot keep the camellia essential oil from working continuously.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The first purpose of the present invention is to provide a method for preparing microcapsules containing camellia extract. The microcapsules containing camellia extract are obtained by effectively coating the camellia extract, thereby solving the problem that camellia essential oil is volatile under high temperature conditions, difficult to dissolve in water, and is not suitable for finishing and processing of textiles; and the microcapsules prepared by the method can continuously release the camellia extract.

[0007] The second object of the present invention is to provide a microcapsule containing camellia extract having a strong antioxidant function.

[0008] The third object of the present invention is to provide a fabric in which microcapsules are cross-linked on fibers without affecting the feel of the fabric and without falling off after being washed more than 50 times.

[0009] The fourth object of the present invention is to provide a method for preparing a fabric, by forming covalent bonds between microcapsules and fabric fibers through chemical reactions, so that they can be firmly combined together, thereby obtaining a fabric with high quality, good performance and sustainable release of camellia extract.

[0010] The fifth purpose of the present invention is to provide an application of fabric in the preparation of textile products. The textile product obtained by attaching camellia extract to the fabric fiber spandex has extremely strong elasticity and supporting force.

[0011] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0012] The present invention first provides a method for preparing microcapsules containing camellia extract, comprising the following steps:

[0013] (1) Adding fatty alcohol polyoxyethylene ether to a solution containing glacial acetic acid and chitosan, and stirring to obtain a mixed solution A;

[0014] (2) adding a solution containing camellia extract to the mixed solution A to obtain a mixed solution B;

[0015] Optionally, the mixed solution B also includes a far-infrared finishing agent;

[0016] (3) adding an aqueous solution of sodium tripolyphosphate dropwise into the mixed solution B, stirring to obtain a solution containing microcapsule shells, and filtering and drying to obtain microcapsules containing camellia extract.

[0017] Preferably, in step (1), the method for preparing the solution containing glacial acetic acid and chitosan comprises: dissolving chitosan in a glacial acetic acid solution to obtain a chitosan mixed solution having a chitosan concentration of 0.5 wt% to 1 wt%.

[0018] Preferably, the concentration of the glacial acetic acid solution is 1 wt% to 3 wt%.

[0019] Preferably, the dissolving process includes stirring; more preferably, the solution temperature during stirring is 50-55°C.

[0020] Preferably, in step (1), the temperature of the solution during the stirring process of the mixed solution A obtained after stirring is 50-55°C.

[0021] Preferably, in step (3), the concentration of the aqueous solution of sodium tripolyphosphate is 0.5 wt% to 1 wt%.

[0022] Preferably, in step (3), the dropping speed is 0.02 mL / s to 0.05 mL / s.

[0023] Preferably, the mass ratio of the glacial acetic acid, the chitosan, the fatty alcohol polyoxyethylene ether, the camellia extract, the far-infrared finishing agent and the sodium tripolyphosphate is 1:1:3:1:0-2:1.

[0024] The present invention further provides a microcapsule containing camellia extract, which is mainly prepared by the preparation method of the microcapsule containing camellia extract.

[0025] Preferably, the median particle size of the microcapsules is 100 nm to 100 μm.

[0026] The present invention further provides a fabric, comprising fabric fibers and microcapsules containing camellia extract attached to the fabric fibers; the microcapsules containing camellia extract are the microcapsules.

[0027] Preferably, the fabric fibers include nylon and / or spandex.

[0028] The present invention also provides a method for preparing the fabric, comprising the following steps:

[0029] The microcapsules containing camellia extract, a crosslinking agent, fabric fibers and pure water are mixed and stirred for 10 to 20 minutes to crosslink the microcapsules and fabric fibers, and then dried to obtain microcapsule fabric fibers. The microcapsule fabric fibers are spun to obtain the product.

[0030] Preferably, the mass ratio of the microcapsules containing camellia extract to the textile fibers is 1:50.

[0031] Preferably, the cross-linking agent includes at least one of polyfunctional aziridine, sodium tripolyphosphate, epichlorohydrin, genipin, glutaraldehyde, and isocyanate.

[0032] The present invention further provides application of the fabric in preparing textile products, wherein the textile products include clothing, gloves, scarves, bed sheets, quilt covers, towels, socks and medical accessories.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) The method for preparing microcapsules containing camellia extract provided by the present invention solves the problem that camellia essential oil is volatile under high temperature conditions, difficult to dissolve in water, and is not suitable for finishing and processing of textiles by effectively coating the camellia extract to obtain microcapsules containing camellia extract; and the microcapsules obtained by the method can continuously release the camellia extract.

[0035] (2) The microcapsules containing camellia extract provided by the present invention can continuously release camellia extract and tea polyphenols, have strong antioxidant function, and as the last barrier of the human body, remove more than 86% of free radicals, which can well protect our skin.

[0036] (3) The microcapsules containing camellia extract provided by the present invention have far-infrared properties and can promote blood circulation and metabolism.

[0037] (4) The microcapsules containing camellia extract provided by the present invention have a surface wall made of bio-based functional lipid vesicles and non-phospholipid lipid bilayer vesicles to create bio-based capsules. They are environmentally friendly and skin-friendly, and are more environmentally friendly to the skin. They self-crosslink with fabric fibers, adhere tightly, feel soft, and are not easily washed off.

[0038] (5) The microcapsules containing camellia extract provided by the present invention have 3A antibacterial effect.

[0039] (6) The microcapsules containing camellia extract provided by the present invention have excellent tensile elongation: longitudinal ≥ 200%, transverse ≥ 200%.

[0040] (7) The fabric provided by the present invention cross-links the microcapsules on the fibers, which does not affect the feel of the fabric and will not fall off after being washed more than 50 times.

[0041] (8) The fabric provided by the present invention has good air permeability and comfort, and has excellent elasticity and supporting force, and can provide a good supporting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 A schematic flow chart of a method for preparing microcapsules containing camellia extract provided by the present invention;

[0044] Figure 2 This is a schematic diagram of the release process of the microcapsules containing camellia extract provided by the present invention. DETAILED DESCRIPTION

[0045] The technical scheme of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but it will be understood by those skilled in the art that the following described embodiments are part of embodiments of the present invention, rather than all embodiments, and are only used to illustrate the present invention, and should not be considered as limiting the scope of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention. If specific conditions are not specified in the embodiments, they are carried out according to normal conditions or conditions recommended by the manufacturer. If the manufacturer is not specified in the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0046] In a first aspect, the present invention provides a method for preparing microcapsules containing camellia extract, comprising the following steps:

[0047] (1) Add fatty alcohol polyoxyethylene ether to a solution containing glacial acetic acid and chitosan, and stir to obtain a mixed solution A.

[0048] (2) Adding a solution containing camellia extract into the mixed solution A to obtain a mixed solution B.

[0049] Camellia extract is rich in flavonoids, polyphenols, VE, oleic acid, squalene, phytosterols and other bioactive ingredients and nutrients such as calcium, potassium, magnesium, and manganese. The extract has a good effect on repairing the skin barrier. Among them, VE is vitamin E, which has an antioxidant effect, can protect skin cells from free radical damage, and delay skin aging. Oleic acid is an unsaturated fatty acid that can moisturize the skin and increase its elasticity and softness. Squalene is a fat-soluble substance with a strong moisturizing effect. It can help the skin retain moisture and improve dry skin. Phytosterols can regulate the skin's oil secretion and keep the skin in a balanced state.

[0050] Optionally, the mixed solution B further includes a far-infrared finishing agent. Here, "optionally" means optional, that is, the far-infrared finishing agent may be added or not, and the choice can be made according to the needs.

[0051] In some specific embodiments, the far-infrared finishing agent includes any far-infrared finishing agent commonly used in the art, such as far-infrared finishing agent TF-6269A, but is not limited thereto.

[0052] (3) adding an aqueous solution of sodium tripolyphosphate dropwise into the mixed solution B, stirring to obtain a solution containing microcapsule shells, and filtering and drying to obtain microcapsules containing camellia extract.

[0053] like Figure 1 The figure shows a schematic flow chart of the method for preparing microcapsules containing camellia extract provided by the present invention.

[0054] The preparation method of microcapsules containing camellia extract provided by the present invention first utilizes the electrostatic interaction between chitosan and sodium tripolyphosphate to form a microcapsule shell, thereby providing a protective barrier for the camellia extract. The microcapsule shell is then further mixed with a solution of the camellia extract, so that the microcapsule shell interacts with the camellia extract through ion gelation, thereby achieving effective encapsulation of the camellia extract. Finally, after vacuum filtration, washing, drying and other processing steps, high-quality microcapsules containing camellia extract are obtained. The present invention uses a high-temperature resistant high molecular polymer to wrap the camellia essential oil to prepare a microcapsule dispersion, thereby solving the problem that the camellia essential oil is difficult to dissolve in water, is easy to volatilize under high temperature conditions, and is not suitable for finishing and processing of textiles.

[0055] In addition, the microcapsules containing camellia extract prepared by the above method can continuously release camellia extract and tea polyphenols, have strong antioxidant function, can make the skin anti-oxidant and resist ultraviolet rays, dust, fog, automobile exhaust and other pollution, and avoid skin redness, swelling, itching, allergies, etc. The microcapsules containing camellia extract can release tea polyphenols to remove free radicals and protect the skin from oxidative damage.

[0056] It is understandable that after microcapsules containing camellia extract are arranged on textiles, during the wearing and washing process, the external forces such as friction and pressure can cause cracks in the microcapsule wall material, and the camellia essential oil can be released, thereby exerting its antioxidant properties.

[0057] The microcapsules prepared by the above method have bio-based functional lipid vesicles and non-phospholipid lipid bilayer vesicles on the surface wall to create bio-based capsules. They are environmentally friendly and skin-friendly, more environmentally friendly to the skin, self-cross-linked with fabric fibers, tightly attached, soft to the touch, and not easily washed off, and can achieve continuous release of camellia extract.

[0058] In some specific embodiments, in step (1), the method for preparing the solution containing glacial acetic acid and chitosan comprises: dissolving chitosan in glacial acetic acid solution to obtain a chitosan mixed solution with a chitosan concentration of 0.5wt% to 1wt%; wherein the concentration (mass fraction) of the chitosan solution includes but is not limited to any one of 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt% or a range between any two of them.

[0059] In some specific embodiments, the concentration (mass fraction) of the glacial acetic acid solution is 1wt% to 3wt%, including but not limited to any point value of 1wt%, 1.3wt%, 1.5wt%, 1.8wt%, 2wt%, 2.2wt%, 2.5wt%, 2.8wt%, 3wt% or a range value between any two of them.

[0060] In some specific embodiments, the dissolution process includes stirring; wherein the solution temperature during stirring is 50-55°C, including but not limited to any point value of 50°C, 51°C, 52°C, 53°C, 54°C, 55°C or a range value between any two of them.

[0061] In some specific embodiments, in step (1), the solution temperature during the stirring process of the mixed solution A obtained after stirring is 50-55°C, including but not limited to any one of 50°C, 51°C, 52°C, 53°C, 54°C, and 55°C or a range between any two of them.

[0062] In some specific embodiments, in step (1), the mixed solution A is obtained and then cooled to room temperature.

[0063] In some specific embodiments, in step (2), the method for preparing the solution containing camellia extract comprises: mixing the camellia extract with water and then dispersing the mixture by ultrasonication at room temperature (eg, 10 to 30° C.) to uniformly disperse the mixture.

[0064] In some specific embodiments, in step (2), the solution containing camellia extract is added to the mixed solution A and stirred at room temperature, for example, 10 to 30°C.

[0065] In some specific embodiments, in step (3), the concentration (mass fraction) of the aqueous solution of sodium tripolyphosphate is 0.5wt% to 1wt%, including but not limited to any one of 0.5wt%, 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1wt% or a range between any two of them.

[0066] In some specific embodiments, in step (3), the dripping speed is 0.02 mL / s to 0.05 mL / s, including but not limited to any point value of 0.02 mL / s, 0.03 mL / s, 0.04 mL / s, 0.05 mL / s or a range value between any two of them.

[0067] In some specific embodiments, in step (3), the aqueous solution of sodium tripolyphosphate is added dropwise to the mixed solution B with stirring at room temperature, for example, 10 to 30° C. Stirring can promote electrostatic interaction between the amino groups of chitosan and the anions of sodium tripolyphosphate to form a strong microcapsule shell.

[0068] In some specific embodiments, in step (3), the filtration method includes vacuum filtration to remove impurities.

[0069] In some specific implementations, the mass ratio of the glacial acetic acid, the chitosan, the fatty alcohol polyoxyethylene ether, the camellia extract, the far-infrared finishing agent and the sodium tripolyphosphate is 1:1:3:1:0 to 2:1.

[0070] The above ratio can ensure the quality and performance of the microcapsules.

[0071] In a second aspect, the present invention provides a microcapsule containing a camellia extract, which is mainly prepared by the above-mentioned preparation method of the microcapsule containing a camellia extract.

[0072] The microcapsules containing camellia extract provided by the present invention have anti-oxidation and anti-free radical effects, and as the last barrier of the human body, they can remove more than 86% of free radicals and protect our skin well.

[0073] In some specific embodiments, the microcapsules containing camellia extract provided by the present invention have far-infrared properties: the fabric emits wave-like energy all the time, promoting blood circulation and metabolism.

[0074] In some specific embodiments, the microcapsules containing camellia extract provided by the present invention also have 3A antibacterial effect.

[0075] In some specific embodiments, the microcapsules containing camellia extract provided by the present invention also have excellent tensile elongation (FZ / T70006): longitudinal ≥200%, transverse ≥200%.

[0076] It is understandable that there are many ways for microcapsules to rupture, including heating, extrusion, friction, chemical reaction, etc. The rupture pressure of microcapsules will be affected by many factors, such as the median particle size, wall thickness, material, encapsulated substances, etc. of the microcapsules. Generally speaking, microcapsules with smaller median particle sizes may require less pressure to rupture, while microcapsules with larger median particle sizes may require greater pressure. In addition, the wall thickness of the microcapsule will also affect the rupture pressure. Microcapsules with thicker walls may require greater pressure to rupture, where the wall thickness is affected by the concentration and dosage of the raw materials. Different materials will also affect the rupture pressure. Some materials may be more fragile and easily ruptured at lower pressures, while other materials may be stronger and require higher pressures to rupture.

[0077] like Figure 2 Shown is a schematic diagram of the release process of the microcapsules containing camellia extract provided by the present invention.

[0078] In some specific embodiments, the median particle size of the microcapsules containing camellia extract is 100nm to 100μm, including but not limited to any point value of 100nm, 300nm, 500nm, 800nm, 1μm, 5μm, 10μm, 20μm, 30μm, 50μm, 80μm, 100μm or any range value between two of them.

[0079] Micro-nano microcapsules can be tightly attached to fabric fibers, making the fabric soft, and release red camellia factors during movement and friction, which can protect the skin condition. In addition, the above median particle size can ensure that the microcapsules containing camellia extracts are broken and the camellia extracts are continuously released.

[0080] In a third aspect, the present invention provides a fabric, comprising fabric fibers and microcapsules containing camellia extract attached to the fabric fibers; wherein the microcapsules containing camellia extract are the above-mentioned microcapsules.

[0081] The fabric provided by the invention cross-links the microcapsules on the fibers, does not affect the feel of the fabric, and will not fall off after being washed more than 50 times.

[0082] During processing or use, due to external pressure, friction, pH value and other stimuli, the microcapsules will rupture or release the encapsulated camellia extract through diffusion of the microcapsule wall, thereby achieving the effect of scavenging free radicals.

[0083] In addition, camellia extract is evenly distributed on the fiber and has other beneficial properties such as antibacterial, far infrared, antioxidant, etc.

[0084] In some specific embodiments, the fabric fibers include nylon and / or spandex.

[0085] Among them, nylon and spandex have good breathability and comfort, and have excellent elasticity and support, which can provide good supporting effects.

[0086] In a fourth aspect, the present invention provides a method for preparing the above-mentioned fabric, comprising the following steps: mixing microcapsules containing camellia extract, a cross-linking agent, fabric fibers and pure water, and stirring for 10 to 20 minutes (including but not limited to any one of 10 minutes, 13 minutes, 15 minutes, 18 minutes, 20 minutes or any range between two of them), cross-linking the microcapsules and the fabric fibers, drying to obtain microcapsule fabric fibers, and weaving the microcapsule fabric fibers.

[0087] Through chemical reactions, covalent bonds are formed between the microcapsules and fabric fibers, which can firmly bind them together, thereby obtaining high-quality, good-performance fabrics that continuously release camellia extract.

[0088] In some specific implementations, in order to improve the antibacterial, far infrared, antioxidant, free radical scavenging and other properties of the fabric, the mass ratio of the microcapsules containing the camellia extract to the fabric fibers is 1:50.

[0089] In some specific embodiments, the cross-linking agent includes at least one of multifunctional aziridine, sodium tripolyphosphate, epichlorohydrin, genipin, glutaraldehyde, and isocyanate.

[0090] In some specific embodiments, the weaving process of weaving the microcapsule fabric fiber includes: after the grey cloth is woven, continuous open-width water washing and degreasing (temperature 80-95°C, machine speed 10-30 m / min) → pre-setting (temperature 150-190°C, machine speed 18-25 m / min) → down-flow overflow cylinder dyeing (temperature 95-105°C, running for 30-60 minutes) → post-treatment (adding suction and discharge and hydrophilic additives 5-10G / L temperature 40-70°C, running for 10-20 minutes) → finished product setting (temperature 130-160°C, machine speed 18-40 m / min), and finally obtaining a finished product with a double-sided elastic knitted fabric specification of 100-120g / M2.

[0091] In a fifth aspect, the present invention provides the use of the above-mentioned fabric in the preparation of textile products, and the textile products include clothing, gloves, scarves, bed sheets, quilt covers, towels, socks and medical accessories.

[0092] In some specific embodiments, clothing, such as bras, can make the close-fitting area of ​​clothing smoother and healthier, and the fabric containing camellia extract can be set in the cups, shoulder straps, side wings and other parts to ensure a reasonable structure and provide appropriate support and comfort.

[0093] In some specific embodiments, considering the fabric properties after the camellia extract is added, the fabric containing the camellia extract is used for soft support or size-free bras.

[0094] In addition, the fabric or textile products obtained by attaching camellia extract to the fabric fiber spandex, such as bras, have extremely strong elasticity and can wrap the breasts well with the changes of seasons and time. While providing upward support to the breasts, there will be no sense of oppression.

[0095] Example 1

[0096] The preparation method of microcapsules containing camellia extract provided in this embodiment comprises the following steps:

[0097] (1) Dissolve chitosan in a 1 wt% glacial acetic acid solution at 55°C, stir evenly, and prepare a chitosan mixed solution with a chitosan mass fraction of 0.5 wt%; then add fatty alcohol polyoxyethylene ether thereto, and stir to obtain a mixed solution A;

[0098] (2) mixing the camellia extract with water and dispersing them by ultrasonic at room temperature (25° C.) to obtain a solution containing the camellia extract after uniform dispersion, and then adding the mixed solution A obtained in step (1) to the mixed solution to obtain a mixed solution B;

[0099] (3) adding a 0.5 wt% sodium tripolyphosphate aqueous solution dropwise to the mixed solution B obtained in step (2) at a rate of 0.02 mL / s, stirring at room temperature (25° C.) to induce electrostatic interaction between the amino groups of chitosan and the anions of sodium tripolyphosphate to obtain a solution containing microcapsule shells, and then vacuum filtering, washing, and drying to obtain microcapsules containing camellia extract.

[0100] In the above preparation method, the mass ratio of glacial acetic acid, chitosan, fatty alcohol polyoxyethylene ether, camellia extract and sodium tripolyphosphate is 1:1:3:1:0-2:1. The median particle size of the microcapsules containing camellia extract prepared in this embodiment is 300 nm.

[0101] The preparation method of the fabric provided in this embodiment includes the following steps: mixing microcapsules containing camellia extract, a cross-linking agent, fabric fibers and pure water in a mass ratio of 1:2:3:1 (wherein the cross-linking agent is epichlorohydrin and the fabric fibers are nylon), and stirring for 10 minutes to cross-link the microcapsules and the fabric fibers, followed by drying to obtain microcapsule fabric fibers, and weaving the microcapsule fabric fibers to obtain fabric.

[0102] Example 2

[0103] The preparation method of microcapsules containing camellia extract provided in this embodiment comprises the following steps:

[0104] (1) Dissolve chitosan in a 2 wt% glacial acetic acid solution at 50°C, stir evenly, and prepare a chitosan mixed solution with a chitosan mass fraction of 0.7 wt%; then add fatty alcohol polyoxyethylene ether thereto, and stir to obtain a mixed solution A;

[0105] (2) mixing the camellia extract with water and dispersing them by ultrasonic at room temperature (25° C.) to obtain a solution containing the camellia extract after uniform dispersion, and then adding the mixed solution A obtained in step (1) to the mixed solution to obtain a mixed solution B;

[0106] (3) adding a 0.7 wt % sodium tripolyphosphate aqueous solution dropwise to the mixed solution B obtained in step (2) at a rate of 0.04 mL / s, stirring at room temperature (25° C.) to induce electrostatic interaction between the amino groups of chitosan and the anions of sodium tripolyphosphate to obtain a solution containing microcapsule shells, and then vacuum filtering, washing, and drying to obtain microcapsules containing camellia extract.

[0107] In the above preparation method, the mass ratio of glacial acetic acid, chitosan, fatty alcohol polyoxyethylene ether, camellia extract and sodium tripolyphosphate is 1:1:3:1:0-2:1. 。 The median particle size of the microcapsules containing camellia extract prepared in this example is 1000 nm.

[0108] The preparation method of the fabric provided in this embodiment includes the following steps: mixing microcapsules containing camellia extract, a cross-linking agent, fabric fibers and pure water in a mass ratio of 1:2:3:1 (wherein the cross-linking agent is genipin and the fabric fibers are nylon), and stirring for 15 minutes to cross-link the microcapsules and fabric fibers, followed by drying to obtain microcapsule fabric fibers, and weaving the microcapsule fabric fibers to obtain fabric.

[0109] Example 3

[0110] The preparation method of microcapsules containing camellia extract provided in this embodiment comprises the following steps:

[0111] (1) Dissolving chitosan in a 3 wt % glacial acetic acid solution at 53° C. and stirring the solution to obtain a chitosan mixed solution having a chitosan mass fraction of 1 wt %; then adding fatty alcohol polyoxyethylene ether thereto and stirring the solution to obtain a mixed solution A;

[0112] (2) mixing the camellia extract with water and dispersing them by ultrasonic at room temperature (25° C.) to obtain a solution containing the camellia extract after uniform dispersion, and then adding the mixed solution A obtained in step (1) to the mixed solution to obtain a mixed solution B;

[0113] (3) adding a 1 wt % sodium tripolyphosphate aqueous solution dropwise to the mixed solution B obtained in step (2) at a rate of 0.05 mL / s, stirring at room temperature (25° C.) to induce electrostatic interaction between the amino groups of chitosan and the anions of sodium tripolyphosphate to obtain a solution containing microcapsule shells, and then vacuum filtering, washing, and drying to obtain microcapsules containing camellia extract.

[0114] In the above preparation method, the mass ratio of glacial acetic acid, chitosan, fatty alcohol polyoxyethylene ether, camellia extract and sodium tripolyphosphate is 2: 2: 3: 2: 1. The median particle size of the microcapsules containing camellia extract prepared in this example is 10 μm.

[0115] The preparation method of the fabric provided in this embodiment includes the following steps: mixing microcapsules containing camellia extract, a cross-linking agent, fabric fibers and pure water in a mass ratio of 1:2:3:4 (wherein the cross-linking agent is isocyanate and the fabric fibers are spandex), and stirring for 20 minutes to cross-link the microcapsules and the fabric fibers, followed by drying to obtain microcapsule fabric fibers, and weaving the microcapsule fabric fibers to obtain fabric.

[0116] Example 4

[0117] The preparation method of the microcapsules containing camellia extract provided in this embodiment is basically the same as that in Example 1, except that in step (2), a far-infrared finishing agent TF-6269A is further added, and the mass ratio of the far-infrared finishing agent TF-6269A to chitosan is 1:20.

[0118] The preparation method of the fabric provided in this embodiment is the same as that in embodiment 1.

[0119] Comparative Example 1

[0120] The preparation method of the microcapsules containing camellia extract provided in this comparative example is basically the same as that in Example 1, except that chitosan is not added in step (1).

[0121] The preparation method of the fabric provided in this comparative example is the same as that of Example 1.

[0122] Comparative Example 2

[0123] The preparation method of the microcapsules containing camellia extract provided in this comparative example is basically the same as that in Example 1, except that in step (1), no fatty alcohol polyoxyethylene ether is added.

[0124] The preparation method of the fabric provided in this comparative example is the same as that of Example 1.

[0125] Comparative Example 3

[0126] The preparation method of the microcapsules containing camellia extract provided in this comparative example is basically the same as that in Example 1, except that in step (3), no sodium tripolyphosphate aqueous solution is added.

[0127] The preparation method of the fabric provided in this comparative example is the same as that of Example 1.

[0128] After testing, the microcapsules in the fabrics prepared in Examples 1 to 4 did not fall off after being washed 50 times.

[0129] The microcapsules in the fabric prepared in Comparative Example 1 fell off after 20 washes, the microcapsules in the fabric prepared in Comparative Example 2 fell off after 30 washes, and the microcapsules in the fabric prepared in Comparative Example 3 fell off after 10 washes.

[0130] Although the present invention has been illustrated and described with specific embodiments, it should be appreciated that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some or all of the technical features thereof may be replaced by equivalents without departing from the spirit and scope of the present invention. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. Therefore, this means that all such replacements and modifications within the scope of the present invention are included in the appended claims.

Claims

1. A method for preparing microcapsules containing camellia extract, characterized in that: The following steps are involved: (1) Adding fatty alcohol polyoxyethylene ether to a solution containing glacial acetic acid and chitosan, and stirring to obtain a mixed solution A; (2) adding a solution containing camellia extract to the mixed solution A to obtain a mixed solution B; Optionally, the mixed solution B also includes a far-infrared finishing agent; (3) Adding the aqueous solution of sodium tripolyphosphate dropwise into the mixed solution B, stirring to obtain a solution containing microcapsule shells, and filtering and drying to obtain microcapsules containing camellia extract.

2. The method for preparing microcapsules containing camellia extract according to claim 1, characterized in that: In step (1), the method for preparing the solution containing glacial acetic acid and chitosan comprises: dissolving chitosan in a glacial acetic acid solution to obtain a chitosan mixed solution having a chitosan concentration of 0.5 wt% to 1 wt%; Preferably, the concentration of the glacial acetic acid solution is 1wt% to 3wt%; Preferably, the dissolving process includes stirring; more preferably, the solution temperature during stirring is 50-55°C; Preferably, in step (1), the temperature of the solution during the stirring process of the mixed solution A obtained after stirring is 50-55°C.

3. The method for preparing microcapsules containing camellia extract according to claim 1, characterized in that: In step (3), the concentration of the aqueous solution of sodium tripolyphosphate is 0.5wt% to 1wt%; Preferably, in step (3), the dropping speed is 0.02 mL / s to 0.05 mL / s.

4. The method for preparing microcapsules containing camellia extract according to claim 1, characterized in that: The mass ratio of the glacial acetic acid, the chitosan, the fatty alcohol polyoxyethylene ether, the camellia extract, the far-infrared finishing agent and the sodium tripolyphosphate is 1:1:3:1:0-2:

1.

5. Microcapsules containing camellia extract, characterized in that: The microcapsule is mainly prepared by the preparation method of microcapsules containing camellia extract according to any one of claims 1 to 4.

6. The microcapsule containing camellia extract according to claim 5, characterized in that The median particle size of the microcapsule is 100 nm to 100 μm.

7. A fabric, characterized in that The fabric comprises fabric fibers and microcapsules containing camellia extract attached to the fabric fibers; The microcapsules containing camellia extract are the microcapsules according to claim 5 or 6; Preferably, the fabric fiber comprises 59% nylon and 41% spandex.

8. The method for preparing the fabric according to claim 7, characterized in that: The following steps are involved: The microcapsules containing camellia extract, a crosslinking agent, fabric fibers and pure water are mixed and stirred for 10 to 20 minutes to crosslink the microcapsules and fabric fibers, and then dried to obtain microcapsule fabric fibers. The microcapsule fabric fibers are spun to obtain the product.

9. The method for preparing the fabric according to claim 8, characterized in that: The mass ratio of the microcapsules containing camellia extract to the fabric fibers is 1:50; Preferably, the cross-linking agent includes at least one of polyfunctional aziridine, sodium tripolyphosphate, epichlorohydrin, genipin, glutaraldehyde, and isocyanate.

10. Use of the fabric according to claim 7 in preparing textile products, characterized in that: The textile products include clothing, gloves, scarves, bed sheets, quilt covers, towels, socks and medical accessories.

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