Probiotic hot air non-woven fabric and preparation method thereof

Abstract

The invention discloses a probiotic hot air non-woven fabric and a preparation method thereof, and belongs to the technical field of non-woven fabrics, the key point of the technical scheme is that the probiotic hot air non-woven fabric is formed by compounding a hot air non-woven fabric and a probiotic microcapsule, the probiotic microcapsule is composed of a core material prepared from probiotic powder and a wall material wrapping the core material, and the wall material wraps the hot air non-woven fabric. The wall material is prepared from the following raw materials in parts by weight: 2 to 6 parts of sodium alginate, 2 to 8 parts of carboxymethyl-beta-cyclodextrin, 2 to 4 parts of dopamine, 0.15 to 0.32 part of sodium tripolyphosphate and 100 parts of water. The technical effect of improving the adhesive force between the probiotic microcapsule and the hot air non-woven fabric is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of non-woven fabrics, and in particular to a probiotic hot-air non-woven fabric and a preparation method thereof. Background Art

[0002] Hot air non-woven fabric belongs to a type of hot air bonding (hot rolling, hot air) non-woven fabric. Hot air non-woven fabric is a non-woven fabric that is formed by combing the fibers and then using the hot air on the drying equipment to penetrate the fiber web and heat it to bond it. Since the products made of hot air bonding are fluffy, soft, elastic, and warm, the hot air bonding products are widely used in the manufacture of disposable products with their unique style, such as baby diapers, adult incontinence pads, fabrics for women's hygiene products, as well as napkins, bath towels, disposable tablecloths, etc. Thick products are used to make winter clothes, bedding, baby sleeping bags, mattresses, sofa cushions, etc. High-density hot-melt bonding products can be used to make filter materials, sound insulation materials, and shock-absorbing materials.

[0003] Most of the existing probiotic non-woven fabrics are made by making probiotics into microcapsules and protecting the activity of the probiotics by using the microcapsule shell. However, the adsorption performance between the probiotic microcapsules and the non-woven fabrics is poor, which makes the probiotic microcapsules easy to fall off, resulting in reduced stability in the use of the probiotic non-woven fabrics. Summary of the invention

[0004] In order to solve the problem of poor adhesion between existing probiotic capsules and non-woven fabrics, the present invention provides a probiotic hot air non-woven fabric and a preparation method thereof.

[0005] The first object of the present invention is to provide a probiotic hot air nonwoven fabric, which adopts the following technical scheme: A probiotic hot-air non-woven fabric is obtained by compounding a hot-air non-woven fabric and probiotic microcapsules. The probiotic microcapsules are composed of a core material made of probiotic powder and a wall material coating the core material. The wall material comprises the following raw materials in parts by weight: 2-6 parts of sodium alginate, 2-8 parts of carboxymethyl-β-cyclodextrin, 2-4 parts of dopamine, 0.15-0.32 parts of sodium tripolyphosphate and 100 parts of water.

[0006] Preferably, the carboxymethyl-β-cyclodextrin is modified carboxymethyl-β-cyclodextrin, and the modification method comprises the following steps: dissolving the carboxymethyl-β-cyclodextrin, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide, and stirring for 50-60 minutes to obtain activated modified carboxymethyl-β-cyclodextrin.

[0007] Preferably, the weight ratio of the carboxymethyl carboxymethyl-β-cyclodextrin to 1-ethyl(3-dimethylaminopropyl)carbodiimide hydrochloride and hydroxysuccinimide is 2:(1.5-2):(1-1.2).

[0008] Preferably, the wall material raw material further comprises 0.1-0.3 parts by weight of guar gum.

[0009] Preferably, the probiotic powder consists of probiotics and nutrients in a weight ratio of 1:(0.05-0.1).

[0010] Preferably, the probiotics are composed of Lactobacillus plantarum, Bifidobacterium lactis and Bacillus subtilis in a weight ratio of 1:(1-1.6):(0.8-1.2).

[0011] Preferably, the nutrient is one of galacto-oligosaccharide and lactitol.

[0012] Preferably, the hot air non-woven fabric is made of a composite of PE fiber and PP fiber.

[0013] The second object of the present invention is to provide a method for preparing the above-mentioned probiotic hot air non-woven fabric, comprising the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: Dissolve sodium alginate in water, add probiotic powder after it is completely dissolved and disperse under ultrasonic conditions for 10-15 minutes; S1.2: Add sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 40-50 minutes; S1.3: Add carboxymethyl-β-cyclodextrin to step S1.2 and stir for 10-15h; S1.4: adding dopamine to the mixture obtained in step S1.3, stirring for 50-60 minutes, and then spraying the mixture into a calcium chloride solution through a microcapsule generator to form wet capsules, washing the wet capsules, and freeze-drying them to obtain probiotic microcapsules; Step 2: prepare the impregnation liquid of the probiotic microcapsules, then perform impregnation treatment on the non-woven fabric, and obtain the probiotic non-woven fabric after drying.

[0014] Preferably, in step S1.4, dopamine is added to the mixture obtained in step S1.3, and stirred for 50-60 minutes, followed by adding 0.1-0.3 parts by weight of guar gum, and then stirred for 20-30 minutes and sprayed into a calcium chloride solution through a microcapsule generator to form wet capsules, which are then washed and freeze-dried to obtain probiotic microcapsules.

[0015] In summary, the present invention has the following beneficial effects: 1. The present application adopts a combination of sodium alginate, carboxymethyl-β-cyclodextrin and dopamine, which can achieve stable coating of probiotic powder. At the same time, carboxymethyl-β-cyclodextrin is used as a bridge to undergo amidation grafting with dopamine through chemical reaction, so that the surface of the probiotic microcapsule formed is rich in catechol groups, which can be combined with the hot air non-woven fabric through covalent bonds and non-covalent bonds, thereby effectively improving the bonding performance of the probiotic microcapsules to the hot air non-woven fabric and reducing the probability of the probiotic microcapsules falling off the hot air non-woven fabric. It can be seen that the present application can improve the bonding performance between the probiotic microcapsules and the hot air non-woven fabric without the need for chemical adhesives, while also ensuring the soft feel of the hot air non-woven fabric and avoiding the hot air non-woven fabric from being too hard.

[0016] 2. In the present application, guar gum is added to the probiotic microcapsules, which can promote the aggregation of the microcapsules formed by the already generated sodium alginate, carboxymethyl-β-cyclodextrin and dopamine to form a network structure, and the hydroxyl groups on the guar gum molecular chain can be combined with the phenolic hydroxyl groups or hydroxyl groups on the surface of the microcapsules formed by sodium alginate, carboxymethyl-β-cyclodextrin and dopamine through hydrogen bonds. It is speculated that after the guar gum is attached and entangled with the microcapsules formed by sodium alginate, carboxymethyl-β-cyclodextrin and dopamine, they will also be entangled with each other. Therefore, the microcapsules will be bonded to each other into chains, and may eventually form a network structure. The networked probiotic microcapsules have the resistance to irregular movement, making the entire microcapsule system more stable, and no obvious sedimentation and aggregation will occur. At the same time, the distribution of the probiotic microcapsules becomes more uniform, effectively increasing the number of probiotic microcapsules adhering to the surface of the hot air non-woven fabric and the stability of use, thereby improving the utilization rate of the probiotics.

[0017] 3. The combined use of three probiotics, Lactobacillus plantarum, Bifidobacterium lactis and Bacillus subtilis in this application can effectively improve the microecological balance on the hot air non-woven fabric when the hot air non-woven fabric is applied to sanitary products, thereby bringing excellent anti-inflammatory and antibacterial effects. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below with reference to the embodiments.

[0019] The raw materials used in this application are all commercially available. The nutrient in this application is one of galacto-oligosaccharide and lactitol, which have basically the same effects. Only galacto-oligosaccharide is listed in the examples and comparative examples of this application.

[0020] Example 1 A method for preparing a probiotic hot air non-woven fabric comprises the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: dissolving 2 kg of sodium alginate in 100 kg of water, adding 2 kg of probiotic powder after it is completely dissolved and dispersing under ultrasonic conditions for 10 min, wherein the probiotic powder consists of probiotics and galacto-oligosaccharides in a weight ratio of 1:0.05, and the probiotics consist of Lactobacillus plantarum, Bifidobacterium lactis, and Bacillus subtilis in a weight ratio of 1:1:0.8; S1.2: Add 0.15 kg of sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 40 minutes; S1.3: Add 2 kg of carboxymethyl-β-cyclodextrin to step S1.2 and stir for 10 hours; S1.4: Add 2 kg of dopamine to the mixture obtained in step S1.3, stir for 50 min, and then spray into a 4% calcium chloride solution through a microcapsule generator to form wet capsules. Wash the wet capsules and freeze-dry them to obtain probiotic microcapsules; Step 2: Prepare a padding solution (aqueous solution with a probiotic capsule content of 5%) with the probiotic microcapsules, and then pad the hot air nonwoven fabric composited with PE fiber and PP fiber for 1 hour at a padding temperature of 40° C., and then dry to obtain the probiotic nonwoven fabric.

[0021] Example 2 A method for preparing a probiotic hot air non-woven fabric comprises the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: dissolving 4 kg of sodium alginate in 100 kg of water, adding 2 kg of probiotic powder after it is completely dissolved and dispersing under ultrasonic conditions for 15 min, wherein the probiotic powder consists of probiotics and galacto-oligosaccharides in a weight ratio of 1:0.08, wherein the probiotics consist of Lactobacillus plantarum, Bifidobacterium lactis, and Bacillus subtilis in a weight ratio of 1:1.2:1; S1.2: Add 0.25 kg of sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 45 minutes; S1.3: Add 5 kg of carboxymethyl-β-cyclodextrin to step S1.2 and stir for 13 hours; S1.4: Add 3 kg of dopamine to the mixture obtained in step S1.3, stir for 60 min, and then spray into a 4% calcium chloride solution through a microcapsule generator to form wet capsules, wash the wet capsules, and freeze-dry them to obtain probiotic microcapsules; Step 2: Prepare a padding solution (aqueous solution with a probiotic capsule content of 5%) with the probiotic microcapsules, and then pad the hot air nonwoven fabric composited with PE fiber and PP fiber for 1 hour at a padding temperature of 40° C., and then dry to obtain the probiotic nonwoven fabric.

[0022] Example 3 A method for preparing a probiotic hot air non-woven fabric comprises the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: dissolving 6 kg of sodium alginate in 100 kg of water, adding 2 kg of probiotic powder after it is completely dissolved and dispersing under ultrasonic conditions for 15 min, wherein the probiotic powder is composed of probiotics and galacto-oligosaccharides in a weight ratio of 1:0.1, and the probiotics are composed of Lactobacillus plantarum, Bifidobacterium lactis, and Bacillus subtilis in a weight ratio of 1:1.6:1.2; S1.2: Add 0.32 kg of sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 50 minutes; S1.3: Add 8 kg of carboxymethyl-β-cyclodextrin to step S1.2 and stir for 15 hours; S1.4: Add 4 kg of dopamine to the mixture obtained in step S1.3, stir for 60 min, and then spray into a 4% calcium chloride solution through a microcapsule generator to form wet capsules, wash the wet capsules, and freeze-dry them to obtain probiotic microcapsules; Step 2: Prepare a padding solution (aqueous solution with a probiotic capsule content of 5%) with the probiotic microcapsules, and then pad the hot air nonwoven fabric composited with PE fiber and PP fiber for 1 hour at a padding temperature of 40° C., and then dry to obtain the probiotic nonwoven fabric.

[0023] Example 4 A method for preparing a probiotic hot air non-woven fabric comprises the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: dissolving 4 kg of sodium alginate in 100 kg of water, adding 2 kg of probiotic powder after it is completely dissolved and dispersing under ultrasonic conditions for 15 min, wherein the probiotic powder consists of probiotics and galacto-oligosaccharides in a weight ratio of 1:0.08, wherein the probiotics consist of Lactobacillus plantarum, Bifidobacterium lactis, and Bacillus subtilis in a weight ratio of 1:1.2:1; S1.2: Add 0.25 kg of sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 45 minutes; S1.3: Add 5 kg of carboxymethyl-β-cyclodextrin to step S1.2 and stir for 13 hours; wherein the carboxymethyl-β-cyclodextrin is modified carboxymethyl-β-cyclodextrin, and the modification method comprises the following steps: dissolving carboxymethyl-β-cyclodextrin, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide, and stirring for 50 minutes to obtain activated modified carboxymethyl-β-cyclodextrin, and the weight ratio of carboxymethyl carboxymethyl-β-cyclodextrin to 1-ethyl (3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide is 2:1.5:1; S1.4: Add 3 kg of dopamine to the mixture obtained in step S1.3, stir for 60 min, and then spray into a 4% calcium chloride solution through a microcapsule generator to form wet capsules, wash the wet capsules, and freeze-dry them to obtain probiotic microcapsules; Step 2: Prepare a padding solution (aqueous solution with a probiotic capsule content of 5%) with the probiotic microcapsules, and then pad the hot air nonwoven fabric composited with PE fiber and PP fiber for 1 hour at a padding temperature of 40° C., and then dry to obtain the probiotic nonwoven fabric.

[0024] Example 5 A method for preparing a probiotic hot air non-woven fabric comprises the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: dissolving 4 kg of sodium alginate in 100 kg of water, adding 2 kg of probiotic powder after it is completely dissolved and dispersing under ultrasonic conditions for 15 min, wherein the probiotic powder consists of probiotics and galacto-oligosaccharides in a weight ratio of 1:0.08, wherein the probiotics consist of Lactobacillus plantarum, Bifidobacterium lactis, and Bacillus subtilis in a weight ratio of 1:1.2:1; S1.2: Add 0.25 kg of sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 45 minutes; S1.3: Add 5 kg of carboxymethyl-β-cyclodextrin to step S1.2 and stir for 13 hours; wherein the carboxymethyl-β-cyclodextrin is modified carboxymethyl-β-cyclodextrin, and the modification method comprises the following steps: dissolving carboxymethyl-β-cyclodextrin, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide, and stirring for 60 minutes to obtain activated modified carboxymethyl-β-cyclodextrin, wherein the weight ratio of carboxymethyl carboxymethyl-β-cyclodextrin to 1-ethyl (3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide is 2:1.8:1.1; S1.4: Add 3 kg of dopamine to the mixture obtained in step S1.3, stir for 60 min, and then spray into a 4% calcium chloride solution through a microcapsule generator to form wet capsules, wash the wet capsules, and freeze-dry them to obtain probiotic microcapsules; Step 2: Prepare a padding solution (aqueous solution with a probiotic capsule content of 5%) with the probiotic microcapsules, and then pad the hot air nonwoven fabric composited with PE fiber and PP fiber for 1 hour at a padding temperature of 40° C., and then dry to obtain the probiotic nonwoven fabric.

[0025] Example 6 A method for preparing a probiotic hot air non-woven fabric comprises the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: dissolving 4 kg of sodium alginate in 100 kg of water, adding 2 kg of probiotic powder after it is completely dissolved and dispersing under ultrasonic conditions for 15 min, wherein the probiotic powder consists of probiotics and galacto-oligosaccharides in a weight ratio of 1:0.08, wherein the probiotics consist of Lactobacillus plantarum, Bifidobacterium lactis, and Bacillus subtilis in a weight ratio of 1:1.2:1; S1.2: Add 0.25 kg of sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 45 minutes; S1.3: Add 5 kg of carboxymethyl-β-cyclodextrin to step S1.2 and stir for 13 hours; wherein the carboxymethyl-β-cyclodextrin is modified carboxymethyl-β-cyclodextrin, and the modification method comprises the following steps: dissolving carboxymethyl-β-cyclodextrin, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide, and stirring for 60 minutes to obtain activated modified carboxymethyl-β-cyclodextrin, and the weight ratio of carboxymethyl carboxymethyl-β-cyclodextrin to 1-ethyl (3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide is 2:2:1.2; S1.4: Add 3 kg of dopamine to the mixture obtained in step S1.3, stir for 60 min, and then spray into a 4% calcium chloride solution through a microcapsule generator to form wet capsules, wash the wet capsules, and freeze-dry them to obtain probiotic microcapsules; Step 2: Prepare a padding solution (aqueous solution with a probiotic capsule content of 5%) with the probiotic microcapsules, and then pad the hot air nonwoven fabric composited with PE fiber and PP fiber for 1 hour at a padding temperature of 40° C., and then dry to obtain the probiotic nonwoven fabric.

[0026] Example 7 A method for preparing a probiotic hot air non-woven fabric, which is different from that of Example 5 in that step S1.4 is different, specifically S1.4: adding 3 kg of dopamine to the mixture obtained in step S1.3 and stirring for 60 minutes, adding 0.1 kg of guar gum and stirring for 20 minutes, and then spraying it into a calcium chloride solution with a mass concentration of 4% through a microcapsule generator to form wet capsules, washing the wet capsules and then freeze-drying them to obtain probiotic microcapsules, and the rest is the same as Example 5.

[0027] Example 8 A method for preparing a probiotic hot air non-woven fabric, which is different from that of Example 5 in that step S1.4 is different, specifically S1.4: adding 3 kg of dopamine to the mixture obtained in step S1.3 and stirring for 60 minutes, adding 0.3 kg of guar gum and stirring for 30 minutes, and then spraying it into a calcium chloride solution with a mass concentration of 4% through a microcapsule generator to form wet capsules, washing the wet capsules and then freeze-drying them to obtain probiotic microcapsules, and the rest is the same as Example 5.

[0028] Example 9 A method for preparing a probiotic hot air non-woven fabric is different from that of Example 5 in that the type of probiotics is different, specifically, an equal amount of thermophilic Bacillus is used instead of Lactobacillus plantarum, and the rest is the same as that of Example 5.

[0029] Example 10 A method for preparing a probiotic hot air non-woven fabric, which is different from Example 5 in that the type of probiotics is different, specifically, an equal amount of Lactobacillus rhamnosus is used instead of Bifidobacterium lactis, and the rest is the same as Example 5.

[0030] Embodiment 11 A method for preparing a probiotic hot air non-woven fabric is different from that of Example 5 in that the type of probiotics is different, specifically, an equal amount of Bacillus licheniformis is used instead of Bacillus subtilis, and the rest are the same as those of Example 5.

[0031] Comparative Example 1 A method for preparing a probiotic hot air non-woven fabric is different from that of Example 7 in that dopamine is not added in step S1.4, and the rest is the same as that of Example 7.

[0032] Comparative Example 2 A method for preparing a probiotic hot air non-woven fabric is different from that of Example 7 in that carboxymethyl-β-cyclodextrin is not added, that is, there is no step S1.3, and the rest is the same as that of Example 7.

[0033] Comparative Example 3 A method for preparing a probiotic hot air non-woven fabric is different from that of Example 7 in that an equal amount of chitosan is used instead of sodium alginate, and the rest is the same as that of Example 7.

[0034] Performance Testing The probiotic hot air nonwoven fabrics obtained in the above examples and comparative examples were tested for weight gain rate, stability, softness, and antibacterial properties. The test results are shown in Table 1.

[0035] The weight gain rate test method is as follows: weigh the hot air nonwoven fabric before padding treatment, record it as the initial weight, weigh the obtained probiotic hot air nonwoven fabric product, record it as the finished product mass, and then calculate the weight gain rate; The stability performance test method is: wash the probiotic hot air non-woven fabric with water. The washing method refers to ISO 3679 "Household Washing Test Standard", and the 5A condition is selected for testing. The weight of the probiotic hot air non-woven fabric is recorded before washing, and the weight of the probiotic hot air non-woven fabric is recorded after washing, and then the loss rate is calculated; The softness test method is: the softness of the hot air non-woven fabric raw material is tested according to the standard GB / T2986-2016 "Test method for softness of clothing fabrics", and the value is recorded as the initial value. The softness of the probiotic hot air non-woven fabric product is measured by the same method, and then the softness reduction rate is calculated.

[0036] Antibacterial stability test: The probiotic hot air non-woven fabric was accelerated at constant temperature and humidity for 90 days at 37°C. After testing, the antibacterial stability performance reached the requirements of GB15979-2002 Hygienic Standards for Disposable Nursing Products and Technical Specifications for Disinfection (third edition), and met regulatory requirements. In this application, the antibacterial action time was 20 minutes.

[0037] Table 1 Hot air nonwoven fabric performance test results From Table 1 we can see that: After the probiotic hot air non-woven fabric obtained in the embodiment of the present application is subjected to an accelerated test treatment at constant temperature and humidity, the antibacterial rates of the probiotic hot air non-woven fabric against Staphylococcus aureus, Escherichia coli, and Candida albicans are all greater than 99%, indicating that the probiotic hot air non-woven fabric of the present application has a good antibacterial effect. At the same time, the weight gain rate of the probiotic non-woven fabric of the present application is greater than 17%, the loss rate is less than 3%, and the softness reduction rate is less than 2%. It can be seen that the probiotic microcapsules of the present application have good adhesion on the hot air non-woven fabric, and at the same time, the probiotic microcapsules of the present application have little effect on the softness of the hot air non-woven fabric.

[0038] Compared with Example 2, after the carboxymethyl-β-cyclodextrin is modified, the weight gain rate of the probiotic hot air non-woven fabric obtained in Example 4-6 is further increased compared with Example 2, and the loss rate and softness reduction rate are both significantly reduced compared with Example 2. It can be seen that after the modification of carboxymethyl-β-cyclodextrin, the bonding performance between the probiotic microcapsules and the hot air non-woven fabric can be effectively improved.

[0039] Compared with Example 5, after guar gum is added in step S1.4, the weight gain rate of the probiotic hot air non-woven fabric obtained in Example 7-8 is further increased compared with Example 5, and the loss rate and softness reduction rate are significantly reduced compared with Example 2. It can be seen that the combined use of the above-mentioned components in the present application can effectively improve the bonding force between the probiotic microcapsules and the hot air non-woven fabric.

[0040] Compared with Example 5, when an equal amount of thermophilic Bacillus replaces Lactobacillus plantarum or an equal amount of Lactobacillus rhamnosus replaces Bifidobacterium lactis or an equal amount of Bacillus licheniformis replaces Bacillus subtilis, the antibacterial properties of the probiotic hot air non-woven fabrics obtained in Examples 9-11 are reduced compared with those in Example 5. It can be seen that the combined use of the three probiotics in the present application can effectively ensure the antibacterial properties of the probiotic hot air non-woven fabric.

[0041] Compared with Example 7, when dopamine or carboxymethyl-β-cyclodextrin is not added, the weight gain rate of the probiotic hot air non-woven fabric obtained in Comparative Example 1-2 is reduced, and the loss rate and softness reduction rate are increased, which can further illustrate that the combined use of the components of the present application can ensure the bonding performance of the probiotic microcapsules and the hot air non-woven fabric while reducing the impact on the softness of the hot air non-woven fabric.

[0042] Compared with Example 7, when an equal amount of chitosan is used to replace sodium alginate, the weight gain effect, loss rate, and softness reduction rate of Comparative Example 3 are all worse than those of Example 7, which indirectly illustrates that the combined use of the components in the present application can effectively ensure the bonding effect between the probiotic microcapsules and the hot air non-woven fabric.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A probiotic hot air nonwoven fabric, characterized in that: The invention is obtained by compounding hot air non-woven fabric and probiotic microcapsules. The probiotic microcapsules are composed of a core material made of probiotic powder and a wall material coating the core material. The wall material comprises the following raw materials in parts by weight: 2-6 parts of sodium alginate, 2-8 parts of carboxymethyl-β-cyclodextrin, 2-4 parts of dopamine, 0.15-0.32 parts of sodium tripolyphosphate and 100 parts of water.

2. The probiotic hot air nonwoven fabric according to claim 1, characterized in that: The carboxymethyl-β-cyclodextrin is modified carboxymethyl-β-cyclodextrin, and the modification method comprises the following steps: dissolving the carboxymethyl-β-cyclodextrin, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide, and stirring for 50-60 minutes to obtain activated modified carboxymethyl-β-cyclodextrin.

3. The probiotic hot air nonwoven fabric according to claim 2, characterized in that: The weight ratio of the carboxymethyl carboxymethyl-β-cyclodextrin to 1-ethyl (3-dimethylaminopropyl) carbodiimide hydrochloride and hydroxysuccinimide is 2: (1.5-2): (1-1.2).

4. The probiotic hot air nonwoven fabric according to claim 1, characterized in that: The wall material raw materials also include 0.1-0.3 parts by weight of guar gum.

5. The probiotic hot air nonwoven fabric according to claim 1, characterized in that: The probiotic powder consists of probiotics and nutrients in a weight ratio of 1:(0.05-0.1).

6. The probiotic hot air nonwoven fabric according to claim 5, characterized in that: The probiotics are composed of Lactobacillus plantarum, Bifidobacterium lactis and Bacillus subtilis in a weight ratio of 1: (1-1.6): (0.8-1.2).

7. The probiotic hot air nonwoven fabric according to claim 5, characterized in that: The nutrient is one of galacto-oligosaccharide and lactitol.

8. The probiotic hot air nonwoven fabric according to claim 1, characterized in that: The hot air nonwoven fabric is made of a composite of PE fiber and PP fiber.

9. A method for preparing the probiotic hot air nonwoven fabric according to any one of claims 1 to 8, characterized in that: The method comprises the following preparation steps: Step 1: Preparation of probiotic microcapsules S1.1: Dissolve sodium alginate in water, add probiotic powder after it is completely dissolved and disperse under ultrasonic conditions for 10-15 minutes; S1.2: Add sodium tripolyphosphate to the mixture of step S1.1 and keep stirring for 40-50 minutes; S1.3: Add carboxymethyl-β-cyclodextrin to step S1.2 and stir for 10-15h; S1.4: adding dopamine to the mixture obtained in step S1.3, stirring for 50-60 minutes, and then spraying the mixture into a calcium chloride solution through a microcapsule generator to form wet capsules, washing the wet capsules, and freeze-drying them to obtain probiotic microcapsules; Step 2: prepare the impregnation liquid of the probiotic microcapsules, then perform impregnation treatment on the non-woven fabric, and obtain the probiotic non-woven fabric after drying.

10. The method for preparing a probiotic hot air nonwoven fabric according to claim 9, characterized in that: In step S1.4, dopamine is added to the mixture obtained in step S1.3, and the mixture is stirred for 50-60 minutes, after which 0.1-0.3 parts by weight of guar gum is added, and then the mixture is stirred for 20-30 minutes and then sprayed into a calcium chloride solution through a microcapsule generator to form wet capsules. The wet capsules are washed and freeze-dried to obtain probiotic microcapsules.

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