Self-repairing hypha leather material as well as preparation method and application thereof

Abstract

The invention provides a self-repairing hypha leather material and a preparation method and application thereof, and the preparation method of the self-repairing hypha leather material comprises the following steps: mixing mycelia with a first solution containing polyurethane to form a mixed solution, and preparing the mixed solution into capsule particles; mycelia are arranged in the capsule particles, and polyurethane is wrapped on the surfaces of the mycelia; and infiltrating the hypha leather base material in a second solution containing a polyurethane monomer and capsule particles, taking out the hypha leather base material, and carrying out hot pressing to obtain the self-repairing hypha leather material. The mycelium leather material prepared by the invention has better damage self-repairing function and durability.

Description

Technical Field

[0001] The present application relates to the field of material technology, and in particular to a self-repairing mycelium leather material and a preparation method and application thereof. Background Art

[0002] Leather is the material with the largest area of ​​use in car interiors. As the material with the highest usage requirements and the highest frequency of use, leather has a vital impact on the comfort of the car and also determines the user's evaluation of the car's quality.

[0003] The traditional leather industry faces problems such as high resource consumption and serious environmental pollution. With the increasing awareness of sustainable development and animal welfare, finding alternatives to animal leather has become an urgent problem to be solved. In recent years, mycelium leather prepared from mycelium has attracted widespread attention due to its biodegradability and low environmental impact. However, traditional mycelium leather still has limitations in durability and damage repair ability, which restricts its widespread application.

[0004] Therefore, the traditional technology still needs to be further improved. Summary of the invention

[0005] Based on this, the present application provides a self-repairing mycelium leather material and a preparation method and application thereof. The mycelium leather material can self-repair damage and has good durability.

[0006] The technical solution proposed in this application is as follows:

[0007] According to the first aspect of the present application, a method for preparing a self-repairing mycelium leather material is provided, comprising the following steps:

[0008] Mixing mycelium with a first solution containing polyurethane to form a mixed solution, and preparing capsule particles from the mixed solution; the interior of the capsule particles is the mycelium, and the surface of the mycelium is coated with polyurethane;

[0009] The mycelium leather substrate is immersed in a second solution containing a polyurethane monomer and the capsule particles, and the mycelium leather substrate is taken out and hot-pressed to obtain the self-repairing mycelium leather material.

[0010] In any embodiment, the method for preparing the mycelium and the mycelium leather substrate comprises the following steps:

[0011] The substrate is laid in a culture vessel, a culture solution containing fungal strains is added to the culture vessel for culture, and the tail of the mycelium on the surface of the substrate is cut off after the mycelium grows vigorously, and the cut substrate is used as the mycelium leather substrate, and the cut mycelium is used as the mycelium.

[0012] In any embodiment, the substrate includes one or more of bamboo fiber cloth, hemp fiber cloth, ramie fiber cloth and linen fiber cloth.

[0013] In any embodiment, the fungal strain comprises one or more of a Ganoderma lucidum strain and a Chlamydosporium strain.

[0014] In any embodiment, adding the culture solution containing the fungal strain into the culture vessel for culturing comprises the following steps:

[0015] Inoculating the fungal strain into a liquid culture medium at an inoculum amount of 1vt% to 5vt% to obtain a culture solution containing the fungal strain;

[0016] The culture solution is added to the culture vessel, and cultured for 5 days to 7 days at a temperature of 25° C. to 30° C., a relative humidity of 80% to 95%, and ventilation.

[0017] In any embodiment, the liquid culture medium comprises one or more of potato dextrose medium, sand medium and yeast malt medium.

[0018] In any embodiment, mixing the mycelium with a first solution containing polyurethane to form a mixed solution comprises the following steps:

[0019] The mycelium is suspended in physiological saline or distilled water to prepare a strain suspension with a concentration of 106 CFU / mL to 108 CFU / mL;

[0020] The strain suspension is mixed with the first solution containing polyurethane in a volume ratio of (10-30):(70-90) to form the mixed solution.

[0021] In any embodiment, the first solution includes an organic solvent, and the organic solvent includes one or more of methyl ethyl ketone, ethyl acetate and N,N-dimethylformamide.

[0022] In any embodiment, the first solution includes one or more of glycerol, trimethylolpropane, ethylenediamine, triisocyanate, dibutyltin dioctoate, triethylenediamine, and tetrabutyl titanate.

[0023] In any embodiment, the mixed solution is prepared into the capsule particles by spray drying or emulsification solidification.

[0024] In any embodiment, the second solution comprises the following components by mass ratio: 5% to 10% of the capsule particles, 0.1% to 0.5% of dibutyltin dilaurate, 55% to 70% of polytetrahydrofuran, 18% to 30% of hexamethylene diisocyanate, 5% to 15% of disulfide chain extender, and 0.3% to 1.0% of urea or polyvinyl alcohol.

[0025] In any embodiment, the mycelium leather substrate is immersed in the second solution for 30 min to 60 min.

[0026] In any embodiment, the temperature of the hot pressing is 60° C. to 80° C., the pressure of the hot pressing is 1 MPa to 5 MPa, and the time of the hot pressing is 5 min to 15 min.

[0027] According to the second aspect of the present application, a self-repairing mycelium leather material is provided, which is prepared by the preparation method of the self-repairing mycelium leather material according to the first aspect of the present application.

[0028] According to the third aspect of the present application, a mycelium leather product is provided, comprising the self-repairing mycelium leather material of the second aspect of the present application.

[0029] Compared with the traditional technology, this application has at least the following beneficial effects:

[0030] The mycelium is mixed with a first solution containing polyurethane to form a mixed liquid, and the mixed liquid is made into capsule particles; then the mycelium leather substrate is immersed in a second solution containing polyurethane monomer and the capsule particles, and then taken out and hot-pressed to prepare the mycelium leather material. The preparation method forms capsule particles by wrapping polyurethane on the outside of the mycelium, so that the mycelium can still maintain its biological activity after subsequent processes (such as hot pressing). When the mycelium leather material is damaged (such as scratched), the mycelium leather material can first be filled with polyurethane at the damaged stimulated surface, and then the mycelium breaks the wall and grows, so as to realize the self-repair function of the mycelium leather material and improve the durability of the mycelium leather material.

[0031] In addition, by pre-wrapping the mycelium with polyurethane to form capsule particles, the dispersion uniformity of the mycelium in the second solution can be improved, thereby improving the distribution uniformity of the mycelium in the mycelium leather material and improving the self-repairing performance of the mycelium leather material. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present application. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. Unless otherwise specifically stated, various raw materials, reagents, instruments and equipment used in the present application, etc. can be purchased from the market or can be prepared by existing methods.

[0034] The traditional leather industry faces problems such as high resource consumption and serious environmental pollution. With the increasing awareness of sustainable development and animal welfare, finding alternatives to animal leather has become an urgent problem to be solved. In recent years, mycelium leather prepared from mycelium has attracted widespread attention due to its biodegradability and low environmental impact. However, traditional mycelium leather still has limitations in durability and damage repair ability, which restricts its widespread application.

[0035] Based on this, an embodiment of the present application provides a method for preparing a self-repairing mycelium leather material, the preparation method comprising the following steps:

[0036] The mycelium is mixed with a first solution containing polyurethane to form a mixed liquid, and the mixed liquid is made into capsule particles; wherein the interior of the capsule particles is mycelium, and the surface of the mycelium is coated with polyurethane; the mycelium leather substrate is immersed in a second solution containing polyurethane monomer and the above-mentioned capsule particles, and the mycelium leather substrate is taken out and hot-pressed to obtain a mycelium leather material.

[0037] The preparation method of the above-mentioned mycelium leather material is to mix mycelium with a first solution containing polyurethane to form a mixed liquid, and to prepare capsule particles from the mixed liquid; then the mycelium leather substrate is immersed in a second solution containing polyurethane monomer and the above-mentioned capsule particles, and then hot-pressed after being taken out to prepare the mycelium leather material. The preparation method forms capsule particles by wrapping polyurethane on the outside of the mycelium, so that the mycelium can still maintain its biological activity after subsequent processes (such as hot pressing). When the mycelium leather material is damaged (such as scratched), the mycelium leather material can first be filled with polyurethane at the damaged stimulated surface, and then the mycelium breaks the wall and grows, so as to realize the self-repair function of the mycelium leather material and improve the durability of the mycelium leather material. In addition, by using polyurethane to pre-wrap the mycelium to form capsule particles, the dispersion uniformity of the mycelium in the second solution can be improved, thereby improving the distribution uniformity of the mycelium in the mycelium leather material and improving the self-repair performance of the mycelium leather material.

[0038] In some of the embodiments, the preparation method of mycelium and mycelium leather substrate includes the following steps: first, laying the substrate in a culture vessel, then adding a culture solution containing a fungal strain into the culture vessel for culturing, and after the mycelium grows vigorously, cutting off the tail of the mycelium on the surface of the substrate, using the cut substrate as the mycelium leather substrate, and using the cut mycelium as the mycelium.

[0039] Through the above method, the mycelium leather substrate and the mycelium can be obtained at the same time, and the mycelium leather substrate with highly uniform surface mycelium can be obtained after cutting.

[0040] The substrate in the present application can be various natural fiber cloths or other fiber-based cloths. In some embodiments, the substrate can be selected from one or more of bamboo fiber cloth, hemp fiber cloth, ramie fiber cloth and linen fiber cloth.

[0041] When laying the substrate in the culture vessel, it is preferably done on a sterile operating table, and the substrate is laid flat on the bottom of the culture vessel, so that the hyphae grown by the fungal strain on the surface of the substrate are more uniform. The culture vessel can be a culture bottle or a culture dish.

[0042] The fungal strains in the present application can adopt various fungal strains with high-density mycelial networks. In some embodiments, the fungal strains can be selected from one or more of the Ganoderma lucidum strains and the Chlamydosporium strains.

[0043] In some of the embodiments, the culture solution containing the fungal strain is added to a culture vessel for culturing by the following method: first, the fungal strain is inoculated into a liquid culture medium at an inoculation rate of 1vt% to 5vt% to obtain a culture solution containing the fungal strain; then the culture solution is added to a culture vessel paved with a substrate, and cultured for 5d to 7d under the conditions of a temperature of 25°C to 30°C, a relative humidity of 80% to 95%, and ventilation, so that the fungal strain grows hyphae on the substrate.

[0044] It is understood that the inoculation amount of the fungal strain can be 1vt%, 1.2vt%, 1.5vt%, 1.8vt%, 2vt%, 2.2vt%, 2.5vt%, 2.8vt%, 3vt%, 3.2vt%, 3.5vt%, 3.8vt%, 4vt%, 4.2vt%, 4.5vt%, 4.8vt%, 5vt% and any value within the range formed by any two of the above values. The temperature of the culturing process can be 25°C, 26°C, 27°C, 28°C, 29°C, 30°C and any value within the range formed by any two of the above values. The relative humidity of the culturing process can be 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95% and any value within the range formed by any two of the above values. The culture time can be 5d, 5.2d, 5.5d, 5.8d, 6d, 6.2d, 6.5d, 6.8d, 7d, or any value within the range formed by any two of the above values.

[0045] The liquid culture medium used in the present application can be various liquid culture mediums suitable for fungal strain cultivation. In some embodiments, the liquid culture medium used is selected from one or more of potato dextrose medium, sand medium and yeast malt medium (YM medium).

[0046] In some of the embodiments, the mycelium is mixed with the first solution containing polyurethane to form a mixed solution by the following method: first, the mycelium is suspended in sterile physiological saline or sterile distilled water, and is fully stirred using a sterile stirring rod or a magnetic stirrer to uniformly disperse the mycelium to prepare a strain suspension with a concentration of 106 CFU / mL~108 CFU / mL (colony forming units per milliliter); then, the strain suspension is mixed with the first solution containing polyurethane in a volume ratio of (10~30):(70~90) to form a mixed solution.

[0047] In some embodiments, the first solution contains an organic solvent in addition to the polyurethane, and the organic solvent can be selected from one or more of methyl ethyl ketone, ethyl acetate and N,N-dimethylformamide (DMF). The above organic solvent can effectively dissolve the polyurethane to form a uniform polyurethane solution.

[0048] In some embodiments, in order to adjust the curing speed and performance of the polyurethane in the first solution, the first solution may also optionally include one or more of glycerol, trimethylolpropane (TMP), ethylenediamine, triisocyanate, dibutyltin dioctoate (DBDO), triethylenediamine and tetrabutyl titanate. In some specific examples, 1% to 5% by weight of glycerol and 0.1% to 0.5% by weight of dibutyltin dioctoate may be added.

[0049] In some embodiments, after the strain suspension is mixed with the first solution containing polyurethane to form a mixed solution, the mixed solution can be made into capsule particles by spray drying or emulsification solidification.

[0050] Specifically, the mixed liquid can be sprayed through a spray drying device to form tiny droplets, and the tiny droplets are quickly dried in a high-temperature airflow to form tiny capsule particles containing the strain. Alternatively, the mixed liquid is formed into a stable emulsion under the action of an emulsifier, and then the polyurethane is cured by heating or chemical curing to form tiny capsule particles containing the strain.

[0051] In some of the embodiments, the mycelium leather substrate prepared after cutting is immersed in a second solution containing a polyurethane monomer and the above-mentioned capsule particles, and after keeping it for 30 minutes to 60 minutes, the mycelium leather substrate is taken out, and the excess solution is removed. Then, the mycelium leather substrate is placed in an oven and dried at a temperature of 40°C to 50°C, and then the mycelium leather substrate is hot-pressed to obtain a mycelium leather material.

[0052] In some of the embodiments, the second solution includes the following components by mass ratio: 5%~10% of the capsule particles prepared in the present application, 0.1%~0.5% of dibutyltin dilaurate, 55%~70% of polytetrahydrofuran (PTMEG), 18%~30% of hexamethylene diisocyanate (HDI), 5%~15% of disulfide chain extender (HEDS), and 0.3%~1.0% of urea or polyvinyl alcohol.

[0053] Using the above-mentioned second solution, during the hot pressing process, dibutyltin dilaurate, polytetrahydrofuran, hexamethylene diisocyanate, disulfide chain extender and urea or polyvinyl alcohol undergo polymerization reaction to generate polyurethane, thereby connecting the mycelium leather substrate and the capsule particles through the generated polyurethane to form an integrated mycelium leather material.

[0054] In some embodiments, the temperature of hot pressing the mycelium leather substrate taken out from the second solution and dried is 60°C~80°C, the pressure of hot pressing is 1MPa~5MPa, and the time of hot pressing is 5min~15min. Specifically, the mycelium leather substrate taken out from the second solution and dried is placed flat on the lower mold of the hot press, and the hot pressing temperature of the hot press is adjusted to 60°C~80°C, the hot pressing pressure is 1MPa~5MPa, and the hot pressing time is 5min~15min, so as to hot-press the mycelium leather substrate, capsule particles and polyurethane to form a self-repairing mycelium leather material.

[0055] It is understood that the temperature of hot pressing can be 60°C, 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, 67°C, 68°C, 69°C, 70°C, 71°C, 72°C, 73°C, 74°C, 75°C, 76°C, 77°C, 78°C, 79°C, 80°C and any value within the range formed by any two of the above values. The pressure of hot pressing can be 1MPa, 1.5MPa, 2MPa, 2.5MPa, 3MPa, 3.5MPa, 4MPa, 4.5MPa, 5MPa and any value within the range formed by any two of the above values. The time of hot pressing can be 5min, 6min, 7min, 8min, 9min, 10min, 11min, 12min, 13min, 14min, 15min and any value within the range formed by any two of the above values.

[0056] One embodiment of the present application also provides a self-repairing mycelium leather material, which is prepared by the preparation method of the self-repairing mycelium leather material described above. When the self-repairing mycelium leather material is damaged (such as scratched), the mycelium leather material can first be filled with polyurethane at the damaged stimulated surface, and then the mycelium breaks the wall and grows, thereby realizing the self-repairing function of the mycelium leather material, thereby improving the durability of the mycelium leather material.

[0057] One embodiment of the present application also provides a mycelium leather product, which includes the self-repairing mycelium leather material of the present application. By adopting the self-repairing mycelium leather material of the present application, the mycelium leather product has good self-damage repair function and good durability.

[0058] The present application will be further described below in conjunction with specific embodiments and comparative examples, but they should not be construed as limiting the scope of protection of the present application.

[0059] Embodiment 1:

[0060] 1. Strain selection: Select the Ganoderma lucidum strain numbered bio-10369 from the Institute of Applied Ecology, Chinese Academy of Sciences.

[0061] 2. Preparation of mycelium leather substrate: Ganoderma lucidum strains were cultured in potato glucose medium with an inoculation volume of 3% (volume ratio). On a sterile operating table, the hemp fiber cloth substrate was spread flat on the bottom of the culture plate, and the culture solution of Ganoderma lucidum strains was poured into the culture plate for culture. The temperature was controlled at 25°C and the relative humidity was 95%. The culture process was kept ventilated. After 7 days of culture, the mycelium grew to a height of 6mm.

[0062] The tail of the mycelium on the surface of the substrate is cut to obtain a mycelium leather substrate with 4mm high mycelium evenly distributed on the surface, and the excess mycelium cut off is used as the raw material of self-repairing capsule particles in subsequent processes.

[0063] 3. Preparation of self-repairing capsule particles:

[0064] Preparation of self-repair strains: The mycelium collected after cutting is resuspended in sterile distilled water, and is fully stirred using a sterile stirring rod or magnetic stirrer to evenly disperse the mycelium, thereby preparing a high-concentration strain suspension with a concentration of 108 CFU / mL (colony forming units per milliliter).

[0065] Preparation of polyurethane prepolymer: polyurethane was dissolved in N,N-dimethylformamide (DMF) at a mass ratio of 10:7 to form a uniform polyurethane solution. Glycerol (mass ratio 1%) and catalyst dibutyltin dioctanoate (mass ratio 0.1%) were added to the polyurethane solution.

[0066] Encapsulation and mixing: The strain suspension prepared above is mixed with the polyurethane solution in a volume ratio of 3:7 to form a strain-polyurethane mixed solution. During the mixing process, keep stirring evenly to ensure that the strain suspension and the polyurethane solution are fully mixed.

[0067] Preparation of capsule particles: The above-mentioned mixed liquid is sprayed into tiny droplets (droplet diameter is about 10 microns) through a spray drying device, and quickly dried in an air flow at 50° C., thereby forming capsule solid particles of polyurethane wrapped mycelium.

[0068] 4. Preparation of self-repairing mycelium leather materials:

[0069] The prepared mycelium leather substrate was immersed in a solution containing polyurethane monomer and the above self-repairing capsule particles for 1 hour, and then the mycelium leather substrate was taken out and drained to remove excess solution. The mycelium leather substrate immersed in the solution was placed in an oven at 50°C for drying.

[0070] The formula of the above solution is: polytetrahydrofuran (PTMEG) 59wt%, hexamethylene diisocyanate (HDI) 21.5wt%, disulfide chain extender (HEDS) 8wt%, urea 1wt%, dibutyltin dilaurate (DBTDL) 0.5wt%, and self-healing capsule particles 10wt%.

[0071] Place the dried mycelium leather substrate flatly on the lower mold of the hot press, adjust the hot pressing parameters of the hot press and start hot pressing. The hot pressing temperature is 60°C, the hot pressing pressure is 2MPa, and the hot pressing time is 10min. After the hot pressing is completed, take out the shaped self-repairing mycelium leather material.

[0072] Embodiment 2:

[0073] This embodiment is basically the same as Embodiment 1, except that in step 3, the volume ratio of the strain suspension to the polyurethane solution is 1:9.

[0074] Embodiment 3:

[0075] This embodiment is basically the same as Embodiment 1, except that in step 4, the formula of the solution is: 66wt% of polytetrahydrofuran (PTMEG), 23wt% of hexamethylene diisocyanate (HDI), 5wt% of disulfide chain extender (HEDS), 0.5wt% of urea, 0.5wt% of dibutyltin dilaurate (DBTDL), and 5wt% of self-healing capsule particles.

[0076] Embodiment 4:

[0077] This embodiment is basically the same as the embodiment 1, except that: in step 1, the Chlamydosporium strain with the collection number of China Center for Type Culture Collection and the collection number of CCTCC AF 93247 is used instead of the Ganoderma lucidum strain in the embodiment 1.

[0078] Comparative Example 1:

[0079] 1. Strain selection: Select the Ganoderma lucidum strain numbered bio-10369 from the Institute of Applied Ecology, Chinese Academy of Sciences.

[0080] 2. Preparation of mycelium leather substrate: Ganoderma lucidum strains were cultured in potato glucose medium with an inoculation volume of 3% (volume ratio). On a sterile operating table, the hemp fiber cloth substrate was spread flat on the bottom of the culture plate, and the culture solution of Ganoderma lucidum strains was poured into the culture plate for culture. The temperature was controlled at 25°C and the relative humidity was 95%. The culture process was kept ventilated. After 7 days of culture, the mycelium grew to a height of 6mm.

[0081] The mycelium tail of the surface layer of the substrate was cut to obtain a mycelium leather substrate with 4 mm high mycelium evenly distributed on the surface.

[0082] 3. Preparation of mycelium leather materials:

[0083] The prepared mycelium leather substrate was soaked in a solution containing polyurethane monomers for 1 hour, and then the mycelium leather substrate was taken out and drained to remove excess solution. The mycelium leather substrate soaked in the solution was placed in an oven at 50° C. for drying.

[0084] The solution has a formula of: 65 wt% polytetrahydrofuran (PTMEG), 28 wt% hexamethylene diisocyanate (HDI), 6.3 wt% disulfide chain extender (HEDS), 0.2 wt% urea, and 0.5 wt% dibutyltin dilaurate (DBTDL).

[0085] Place the dried mycelium leather substrate flatly on the lower mold of the hot press, adjust the hot pressing parameters of the hot press and start hot pressing. The hot pressing temperature is 60°C, the hot pressing pressure is 2MPa, and the hot pressing time is 10min. After the hot pressing is completed, take out the shaped mycelium leather material.

[0086] Comparative Example 2:

[0087] 1. Strain selection: Select the Ganoderma lucidum strain numbered bio-10369 from the Institute of Applied Ecology, Chinese Academy of Sciences.

[0088] 2. Preparation of mycelium leather substrate: Ganoderma lucidum strains were cultured in potato glucose medium with an inoculation volume of 3% (volume ratio). On a sterile operating table, the hemp fiber cloth substrate was spread flat on the bottom of the culture plate, and the culture solution of Ganoderma lucidum strains was poured into the culture plate for culture. The temperature was controlled at 25°C and the relative humidity was 95%. The culture process was kept ventilated. After 7 days of culture, the mycelium grew to a height of 6mm.

[0089] The tail of the mycelium on the surface of the substrate is cut to obtain a mycelium leather substrate with 4 mm high mycelium evenly distributed on the surface, and the excess mycelium cut off is used in subsequent processes.

[0090] 3. Preparation of mycelium leather materials:

[0091] The prepared mycelium leather substrate was soaked in a solution containing polyurethane monomer and the above-mentioned excess mycelium for 1 hour, and then the mycelium leather substrate was taken out and drained to remove excess solution. The mycelium leather substrate soaked in the solution was placed in an oven at 50°C for drying.

[0092] The formula of the above solution is: polytetrahydrofuran (PTMEG) 59wt%, hexamethylene diisocyanate (HDI) 21.5wt%, disulfide chain extender (HEDS) 8wt%, urea 1wt%, dibutyltin dilaurate (DBTDL) 0.5wt%, and mycelium 10wt%.

[0093] Place the dried mycelium leather substrate flatly on the lower mold of the hot press, adjust the hot pressing parameters of the hot press and start hot pressing. The hot pressing temperature is 60°C, the hot pressing pressure is 2MPa, and the hot pressing time is 10min. After the hot pressing is completed, take out the shaped mycelium leather material.

[0094] Performance Test:

[0095] (1) Tensile strength test under normal conditions

[0096] The prepared mycelium leather material was cut into 30 mm × 5 mm specimens and subjected to a tensile test at room temperature with a gauge length of 10 mm and a tensile rate of 10 mm / min. More than three samples were tested in each group and the average value was taken.

[0097] (2) Self-healing performance test

[0098] The mycelium leather material was cut vertically at 15 mm in the middle and the wound was fitted together. It was pressed with a 1 kg weight for 2 minutes and then placed in an oven at 50°C for repair for 6 hours and 24 hours respectively. The repaired samples were subjected to visual appearance evaluation (subjective) and tensile strength test. The tensile strength test method was the same as the tensile strength test method under normal conditions.

[0099] The performance test results of the embodiments and comparative examples of the present application are shown in Table 1.

[0100] Table 1

[0101]

[0102] It can be seen from Table 1 that the self-repairing mycelium leather material prepared in each embodiment of the present application has good self-repairing performance and can improve the durability of the mycelium leather material.

[0103] Compared with Example 1, the main difference between Comparative Example 1 and Example 1 is that the mycelium leather material is prepared without using capsule particles containing mycelium, and the mycelium is not added separately. Since the mycelium left on the mycelium leather substrate after cutting is not active enough, the incision resin repair ability is also insufficient, and the incision cannot be effectively repaired.

[0104] Compared with Example 1, the main difference of Comparative Example 2 is that capsule particles are not used in the preparation of the mycelium leather material, but mycelium is directly added to the solution containing polyurethane monomers. Under the subsequent hot pressing and chemical erosion of the monomer polymerization reaction process, the biological activity of the mycelium is greatly reduced, and the mycelium cannot be evenly dispersed in the mycelium leather material, resulting in the mycelium leather material being unable to effectively repair the incision.

[0105] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0106] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for preparing a self-repairing mycelium leather material, characterized in that: The following steps are involved: Mixing mycelium with a first solution containing polyurethane to form a mixed solution, and preparing capsule particles from the mixed solution; the interior of the capsule particles is the mycelium, and the surface of the mycelium is coated with polyurethane; The mycelium leather substrate is immersed in a second solution containing a polyurethane monomer and the capsule particles, and the mycelium leather substrate is taken out and hot-pressed to obtain the self-repairing mycelium leather material.

2. The method for preparing the self-repairing mycelium leather material according to claim 1, characterized in that: The preparation method of the mycelium and the mycelium leather substrate comprises the following steps: The substrate is laid in a culture vessel, a culture solution containing fungal strains is added to the culture vessel for culture, and the tail of the mycelium on the surface of the substrate is cut off after the mycelium grows vigorously, and the cut substrate is used as the mycelium leather substrate, and the cut mycelium is used as the mycelium.

3. The method for preparing the self-repairing mycelium leather material according to claim 2, characterized in that: The substrate includes one or more of bamboo fiber cloth, hemp fiber cloth, ramie fiber cloth and linen fiber cloth.

4. The method for preparing the self-repairing mycelium leather material according to claim 2, characterized in that: The fungal strains include one or more of Ganoderma lucidum strains and Chlamydosporium strains.

5. The method for preparing the self-repairing mycelium leather material according to claim 2, characterized in that: Adding the culture solution containing the fungal strain into the culture vessel for culturing comprises the following steps: Inoculating the fungal strain into a liquid culture medium at an inoculum amount of 1vt% to 5vt% to obtain a culture solution containing the fungal strain; The culture solution is added to the culture vessel, and cultured for 5 days to 7 days at a temperature of 25° C. to 30° C., a relative humidity of 80% to 95%, and ventilation.

6. The method for preparing the self-repairing mycelium leather material according to claim 5, characterized in that: The liquid culture medium includes one or more of potato dextrose medium, sand medium and yeast malt medium.

7. The method for preparing the self-repairing mycelium leather material according to any one of claims 1 to 6, characterized in that: Mixing the mycelium with the first solution containing polyurethane to form a mixed solution comprises the following steps: The mycelium is suspended in physiological saline or distilled water to prepare a strain suspension with a concentration of 106 CFU / mL to 108 CFU / mL; The strain suspension is mixed with the first solution containing polyurethane in a volume ratio of (10-30):(70-90) to form the mixed solution.

8. The method for preparing the self-repairing mycelium leather material according to claim 7, characterized in that: The first solution includes an organic solvent, and the organic solvent includes one or more of methyl ethyl ketone, ethyl acetate and N,N-dimethylformamide; And / or, the first solution includes one or more of glycerol, trimethylolpropane, ethylenediamine, triisocyanate, dibutyltin dioctoate, triethylenediamine and tetrabutyl titanate.

9. The method for preparing a self-repairing mycelium leather material according to any one of claims 1 to 6 and 8, characterized in that: The mixed liquid is prepared into the capsule particles by spray drying or emulsification solidification.

10. The method for preparing the self-repairing mycelium leather material according to any one of claims 1 to 6 and 8, characterized in that: The second solution comprises the following components by mass ratio: 5% to 10% of the capsule particles, 0.1% to 0.5% of dibutyltin dilaurate, 55% to 70% of polytetrahydrofuran, 18% to 30% of hexamethylene diisocyanate, 5% to 15% of disulfide chain extender, and 0.3% to 1.0% of urea or polyvinyl alcohol.

11. The method for preparing a self-repairing mycelium leather material according to any one of claims 1 to 6 and 8, characterized in that: The mycelium leather substrate is immersed in the second solution for 30 minutes to 60 minutes.

12. The method for preparing a self-repairing mycelium leather material according to any one of claims 1 to 6 and 8, characterized in that: The temperature of the hot pressing is 60° C. to 80° C., the pressure of the hot pressing is 1 MPa to 5 MPa, and the time of the hot pressing is 5 min to 15 min.

13. A self-repairing mycelium leather material, characterized in that: The self-repairing mycelium leather material is prepared by the preparation method of any one of claims 1 to 12.

14. A mycelium leather product, characterized in that: Including the self-repairing mycelium leather material as described in claim 13.

Images