A shoe-pad composite material with bacteriostatic and deodorizing functions

Abstract

The application relates to the technical field of composite materials, and discloses a shoe-pad composite material with bacteriostatic and deodorizing functions, which comprises the following raw materials: EVA, POE elastomer, talcum powder, functional additive, wear-resistant modification component, stearic acid, crosslinking agent and foaming agent; the functional additive is chemically connected with L-arginine through covalent grafting, so that the prepared shoe-pad composite material has good bacteriostatic and deodorizing performances, thereby reducing the generation of peculiar smell; the wear-resistant modification component generates special ball effect in the matrix, thereby improving the wear resistance of the shoe-pad composite material, reducing the wear of the shoe pad in daily use, being beneficial to prolonging the service life of the shoe-pad composite material, and having greater practical popularization value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite materials, in particular to a shoe pad composite material with antibacterial and deodorizing functions. BACKGROUND

[0002] As an indispensable part of shoes, shoe pads not only improve the comfort of wearing but also play an important role in foot health. The types of shoe pads on the market are various. According to the material, shoe pads can be classified into EVA shoe pads, sponge shoe pads, silica gel shoe pads, TPR shoe pads, and cloth shoe pads. Among them, EVA shoe pads have become one of the preferred materials in shoe pad production due to their good cushioning performance, high comfort, and easy processing.

[0003] In recent years, with the improvement of people's living quality and the enhancement of health consciousness, the sanitary performance of shoe pads has become the focus of consumers. However, ordinary EVA shoe pads often have deficiencies in antibacterial and deodorizing aspects. Since the sweat glands on the feet are relatively dense, they can easily secrete a large amount of sweat. In a humid environment, bacteria, fungi, and other microorganisms can easily breed on the feet. Bacteria decompose organic matter in sweat, producing substances with a special odor, which not only affects the wearing experience of consumers but also threatens their health. In addition, ordinary EVA shoe pads have poor wear resistance. Shoe pads will be rubbed and worn out during daily use. Therefore, they need to have good wear resistance to prolong their service life.

[0004] In the prior art, to improve the performance of shoe pads, the basic formula is often optimized. For example, the patent for invention with publication number CN116218071B discloses an EVA antibacterial shoe pad and a preparation method thereof. The invention adds antibacterial agent bioactive glass and nano-copper to the basic formula, so that the prepared shoe pad itself has antibacterial effect, avoiding the risk of shedding of the antibacterial layer of traditional antibacterial shoe pads, and enhancing the stability and persistence of the antibacterial effect. By limiting the special range and ratio, the synergistic effect of bioactive glass and nano-copper is optimized, which has the advantages of high antibacterial rate and stable and persistent antibacterial effect. Therefore, high-performance shoe pad composite materials can be prepared by adding optimized components during the preparation process of shoe pad composite materials. SUMMARY

[0005] In order to solve the problems mentioned in the background art, the purpose of the present application is to provide a shoe pad composite material with antibacterial and deodorizing functions.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] The shoe pad composite material with bacteriostatic and deodorizing functions comprises the following raw materials in parts by weight: 40-60 parts of EVA, 20-30 parts of POE elastomer, 5-15 parts of talcum powder, 4-6 parts of functional additive, 3-7 parts of wear-resistant modification component, 0.5-0.9 parts of stearic acid, 0.4-0.6 parts of crosslinking agent, and 2-3 parts of foaming agent.

[0008] Further, the preparation method of the functional additive comprises the following steps:

[0009] S1: drying coffee grounds at a temperature of 70-90 DEG C for 4-8 hours, then placing the coffee grounds in a glass fiber sleeve, and then placing the glass fiber sleeve in an extraction tube, adding a solvent into a flask, and controlling the temperature at 80-90 DEG C, and performing 4-6 times of reflux operation, each time for 8-12 minutes, and then drying the deoiled coffee grounds to obtain pretreated coffee grounds;

[0010] S2: under the protection of nitrogen, adding the pretreated coffee grounds into N,N-dimethylformamide, and ultrasonically dispersing for 20-30 minutes, then adding isocyanatoethyl methacrylate and a tin catalyst, after completion of the addition, increasing the temperature to 70-80 DEG C, and stirring for 5-7 hours, then standing and precipitating, collecting the solid material, washing, and vacuum drying to obtain modified coffee grounds;

[0011] S3: mixing the modified coffee grounds with deionized water, pouring into a reaction kettle, and starting stirring until a uniformly dispersed liquid is formed, then adding L-arginine, stirring at a temperature of 25-30 DEG C for 6-8 hours, and separating the product, and the obtained product is the functional additive; in step S2, the tin catalyst is any one of dilaurylthio dibutyl tin, stannous octoate or dibutyl tin dilaurate.

[0012] Further, in step S3, the mass ratio of the modified coffee grounds to L-arginine is 1:0.1-0.3.

[0013] It can be inferred that the principle of the above scheme is that in step S1, the Soxhlet extraction method is used to deoily treat the coffee grounds to obtain pretreated coffee grounds; in step S2, the deoily treatment of the coffee grounds exposes the hydroxyl groups on the coffee grounds, and under the action of the organic tin catalyst, the isocyanate groups in the isocyanatoethyl methacrylate structure can react, thereby introducing the alkenyl groups onto the surface of the coffee grounds to obtain modified coffee grounds; and in step S3, the alkenyl groups on the surface of the modified coffee grounds can undergo Michael addition reaction with the amino groups in the structure of L-arginine to obtain the functional additive.

[0014] Further, the preparation method of the functional additive comprises the following steps:

[0015] SS1: mix the mullite fiber with deionized water, ultrasonic treatment for 30-50 min, then add dopamine, adjust the pH value of the system with Tris-HCL buffer, stir at room temperature for 12-36 h, precipitate, collect the solid material, wash, vacuum drying, to obtain modified mullite fiber;

[0016] SS2: ultrasonic dispersion 4g modified mullite fiber in deionized water, add 3g aluminum nitrate, stir at room temperature for 35-45 min, then add ammonia, stir for 30-50 min, filter, wash, dry, to obtain wear-resistant modified component.

[0017] Further, in step SS1, the pH value of the system is 8-9.

[0018] Further, in step SS2, the mass fraction of ammonia is 10%-60%.

[0019] It can be speculated that the principle of the above scheme is: in step SS1, dopamine can undergo oxidative self-polymerization reaction on the surface of mullite fiber under alkaline and aerobic conditions, thereby coating a polydopamine layer on the surface of mullite fiber to obtain modified mullite fiber; in step SS2, the -N= group on the surface of modified mullite fiber can form a coordination bond with Al 3+ , and Al 3+ is fixed to the surface of mullite fiber, then the acid-base neutralization is used to make Al 3+ generate aluminum hydroxide precipitate, so that the mullite fiber surface is loaded with aluminum hydroxide, i.e. wear-resistant modified component.

[0020] Further, the preparation method of the shoe pad composite material comprises the following steps:

[0021] (1) increase the temperature of the internal mixer to 100-110℃, add EVA and POE elastomer, and open the internal mixer for mixing, when the temperature rises to 110-120℃, add talcum powder, functional additives, wear-resistant modified component and stearic acid, when the temperature rises to 120-130℃, add crosslinking agent and foaming agent, mix for 3-6 min to obtain mixed material;

[0022] (2) put the mixed material obtained in step (1) into the open mill for mixing, set the roller temperature of the open mill to 80-90℃, and the roller gap to 2-6 mm, after uniform mixing, control the temperature of the final sheet to 40-70℃, and the sheet thickness to 4-7 mm, to obtain the mixed material after opening;

[0023] (3) place the mixed material after opening in a foaming mold for foaming treatment, naturally cool the foamed semi-finished product for 40-50 h to obtain a foamed sheet;

[0024] (4) The obtained foamed sheet is cut and trimmed to obtain the shoe-pad composite material.

[0025] Further, in step (1), the crosslinking agent is any one of 1,4-bis-tert-butyl peroxyisopropyl benzene or dicumyl peroxide; and the foaming agent is any one of azodicarbonamide, sodium bicarbonate, ammonium bicarbonate or expandable microspheres.

[0026] Further, in step (3), in the foaming process, the foaming temperature is set to 160-170 DEG C, the foaming pressure is 10-15 MPa, and the foaming time is 10-15 min.

[0027] The present application has the following advantages:

[0028] (1) The present application adds functional additives and wear-resistant modification components in the preparation process of the shoe-pad composite material, and the raw materials cooperate with each other, so that the prepared shoe-pad composite material has good antibacterial and deodorizing properties and wear resistance, which is beneficial to prolong the service life of the shoe-pad product and has greater practical promotion value.

[0029] (2) The present application chemically connects coffee grounds and L-arginine by covalent grafting to obtain functional additives, which has the effects of moisture absorption and deodorization, so that the prepared shoe-pad composite material has good deodorizing performance, and the strong positive guanidino group in the functional additives can adsorb and combine with various microorganisms such as bacteria and viruses with negative electricity, so that the shoe-pad composite material has good antibacterial effect, thereby reducing the generation of odor.

[0030] (3) The present application adds wear-resistant modification components as functional fillers in the matrix, and the interface affinity between the wear-resistant modification components and the matrix is effectively improved after the mullite fibers are coated with polydopamine, which can be relatively uniformly dispersed in the matrix to form a good filling effect and produce a special ball effect, thereby improving the wear resistance of the shoe-pad composite material, reducing the wear of the shoe-pad in daily use, and effectively prolonging the service life of the shoe-pad.

[0031] Of course, it is not necessary for any product implementing the present application to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0033] Figure 1 This is the infrared spectrum test chart of the functional additive prepared in Example 1 of the present invention.

[0034] Figure 2 This is an infrared spectrum test chart of the modified mullite fiber prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] Example 1

[0037] 1. Preparation of functional additives

[0038] S1: 5 g of coffee grounds were dried at 80°C for 6 h, placed in a glass fiber sleeve, and then placed in an extraction tube. 35 ml of n-hexane was added to the flask and the temperature was controlled at 85°C. Reflux was performed five times, each time for 10 min. The deoiled coffee grounds were then dried to obtain pretreated coffee grounds.

[0039] S2: Under nitrogen protection, 6 g of pretreated coffee grounds were added to N,N-dimethylformamide and ultrasonically dispersed for 25 min. Then, 1.2 g of isocyanoethyl methacrylate and 0.05 g of stannous octoate were added. After the addition, the temperature was raised to 75°C, and the mixture was stirred at this temperature for 6 h. The mixture was allowed to settle, and the solid material was collected, washed, and vacuum-dried to obtain modified coffee grounds.

[0040] S3: Mix 5 g of modified coffee grounds with deionized water, pour into a reactor, start stirring until a uniform dispersion is formed, add 1.4 g of L-arginine, stir at 28°C for 7 hours, and separate the product. The obtained product is the functional additive.

[0041] The functional additives were analyzed by infrared spectroscopy using a TENSOR 27 Fourier transform infrared spectrometer produced by BRUKER, Germany. Figure 1 As shown by Figure 1 It can be seen that in the infrared spectrum of functional additives, 1680cm -1 The absorption peak of C=O in the carbamate structure appears at 1760cm -1 The absorption peak of the ester group C=O appears at 1654 cm -1 The absorption peak of guanidine C=N appears at 1740 cm -1an absorption peak of -NH appears at 3390 cm -1 an absorption peak of -NH appears at 3390 cm

[0042] II. Preparation of wear-resistant modification component

[0043] SS1: 5g of mullite fibers were mixed with deionized water, ultrasonic treatment for 40min, then 1.5g of dopamine was added, the pH value of the system was adjusted to 8.5 with Tris-HCL buffer, stirred at room temperature for 24h, precipitated, collected the solid material, washed, vacuum dried, and the modified mullite fibers were obtained;

[0044] The modified mullite fibers were analyzed by Fourier transform infrared spectroscopy using a TENSOR 27 Fourier transform infrared spectrometer produced by BRUKER company in Germany, as shown in FIG. 1, in the infrared spectrum of the modified mullite fibers, 3075 cm Figure 2 an absorption peak of -NH appears at 3390 cm -1 an absorption peak of -NH appears at 3390 cm -1 an absorption peak of -NH appears at 3390 cm -1 an absorption peak of -NH appears at 3390 cm -1 an absorption peak of -NH appears at 3390 cm

[0045] SS2: 4g of modified mullite fibers were ultrasonically dispersed in deionized water, 3g of aluminum nitrate was added, stirred at room temperature for 40min, then 1g of 40% ammonia water was added, stirred for 40min, then filtered, washed, and dried to obtain the wear-resistant modification component.

[0046] III. Preparation of insole composite material

[0047] (1) The temperature of the internal mixer was raised to 100℃, 40g of EVA and 20g of POE elastomer were added, and the internal mixer was opened for mixing. When the temperature rose to 110℃, 5g of talc, 4g of functional additive, 3g of wear-resistant modification component and 0.5g of stearic acid were added. When the temperature rose to 120℃, 0.4g of dicumyl peroxide and 2g of azodicarbonamide were added, and mixed for 3min to obtain a mixture;

[0048] (2) The mixture obtained in step (1) was put into the open mill for mixing, the roller temperature of the open mill was set to 80℃, the roller gap was 2mm, and the temperature of the finally discharged sheet was controlled at 60℃ after uniform mixing, and the thickness of the discharged sheet was 4mm to obtain the mixed material after opening;

[0049] (3) The mixed material after opening was placed in a foaming mold for foaming treatment, the foaming temperature was set to 160℃, the foaming pressure was 10MPa, and the foaming time was 10min. The foamed semi-finished product was naturally cooled for 40h to obtain a foamed sheet.

[0050] (4) The obtained foamed sheet is cut and trimmed to obtain the shoe pad composite material.

[0051] Example 2

[0052] Preparation of shoe pad composite material

[0053] (1) The temperature of the internal mixer is raised to 105°C, 50g of EVA and 25g of POE elastomer are added, and the internal mixer is opened for mixing. When the temperature rises to 115°C, 10g of talcum powder, 5.5g of functional additive, 6g of wear-resistant modification component and 0.7g of stearic acid are added. When the temperature rises to 125°C, 0.5g of dicumyl peroxide and 2.5g of azodicarbonamide are added, and mixing is carried out for 5min to obtain a mixture;

[0054] (2) The mixture obtained in step (1) is put into the open mill for mixing, and the roller temperature of the open mill is set to 85°C and the roller gap is 4mm. After the mixture is uniformly mixed, the temperature of the finally discharged sheet is controlled at 70°C, and the discharged sheet thickness is 5mm to obtain the mixed material after opening;

[0055] (3) The mixed material after opening is placed in a foaming mold for foaming treatment, and the foaming temperature is set to 165°C, the foaming pressure is 12MPa, and the foaming time is 12min. The semi-finished product after foaming is naturally cooled for 45h to obtain a foamed sheet;

[0056] (4) The obtained foamed sheet is cut and trimmed to obtain the shoe pad composite material.

[0057] The preparation method of the functional additive and the wear-resistant modification component is the same as that in Example 1.

[0058] Example 3

[0059] Preparation of shoe pad composite material

[0060] (1) The temperature of the internal mixer is raised to 110°C, 60g of EVA and 30g of POE elastomer are added, and the internal mixer is opened for mixing. When the temperature rises to 120°C, 15g of talcum powder, 6g of functional additive, 7g of wear-resistant modification component and 0.9g of stearic acid are added. When the temperature rises to 130°C, 0.6g of dicumyl peroxide and 3g of azodicarbonamide are added, and mixing is carried out for 6min to obtain a mixture;

[0061] (2) The mixture obtained in step (1) is put into the open mill for mixing, and the roller temperature of the open mill is set to 90°C and the roller gap is 6mm. After the mixture is uniformly mixed, the temperature of the finally discharged sheet is controlled at 80°C, and the discharged sheet thickness is 7mm to obtain the mixed material after opening;

[0062] (3) The material after opening is placed in a foaming mold to perform foaming treatment, the foaming temperature is set to 170°C, the foaming pressure is 15 MPa, the foaming time is 15 min, the semi-finished product after foaming is naturally cooled for 50 h, and a foamed sheet is obtained;

[0063] (4) The obtained foamed sheet is cut and trimmed to prepare a shoe pad composite material.

[0064] The preparation method of the functional additive is the same as that in Example 1.

[0065] Comparative Example 1

[0066] Preparation of a shoe pad composite material

[0067] (1) The temperature of the internal mixer is raised to 105°C, 50 g of EVA and 25 g of POE elastomer are added, and the internal mixer is opened for mixing, when the temperature is raised to 115°C, 10 g of talcum powder, 5.5 g of functional additive and 0.7 g of stearic acid are added, when the temperature is raised to 125°C, 0.5 g of dicumyl peroxide and 2.5 g of azodicarbonamide are added, and mixing is performed for 5 min to obtain a mixture;

[0068] (2) The mixture obtained in step (1) is put into an open mill for mixing, the roller temperature of the open mill is set to 85°C, the roller gap is 4 mm, and after the mixture is uniformly mixed, the temperature of the finally discharged sheet is controlled to 70°C, and the discharged sheet thickness is 5 mm, to obtain a material after opening;

[0069] (3) The material after opening is placed in a foaming mold to perform foaming treatment, the foaming temperature is set to 165°C, the foaming pressure is 12 MPa, the foaming time is 12 min, the semi-finished product after foaming is naturally cooled for 45 h, and a foamed sheet is obtained;

[0070] (4) The obtained foamed sheet is cut and trimmed to prepare a shoe pad composite material.

[0071] The preparation method of the functional additive is the same as that in Example 1.

[0072] Comparative Example 2

[0073] Preparation of a shoe pad composite material

[0074] (1) The temperature of the internal mixer is raised to 105°C, 50 g of EVA and 25 g of POE elastomer are added, and the internal mixer is opened for mixing, when the temperature is raised to 115°C, 10 g of talcum powder, 5.5 g of functional additive and 0.7 g of stearic acid are added, when the temperature is raised to 125°C, 0.5 g of dicumyl peroxide and 2.5 g of azodicarbonamide are added, and mixing is performed for 5 min to obtain a mixture;

[0075] (2) The mixture obtained in step (1) is put into an open mill for mixing, the roller temperature of the open mill is set to 85°C, the roller gap is 4mm, and after the mixture is uniformly mixed, the temperature of the final sheet is controlled to 70°C, the sheet thickness is 5mm, and the open-mixed material is obtained;

[0076] (3) The open-mixed material is placed in a foaming mold for foaming treatment, the foaming temperature is set to 165°C, the foaming pressure is 12MPa, the foaming time is 12min, the foamed semi-finished product is naturally cooled for 45h, and a foamed sheet is obtained;

[0077] (4) The obtained foamed sheet is cut and trimmed to prepare a shoe pad composite material.

[0078] The preparation method of the wear-resistant modifying component is the same as that in Example 1.

[0079] Comparative Example 3

[0080] Preparation of a shoe pad composite material

[0081] (1) The temperature of the internal mixer is raised to 105°C, 50g of EVA and 25g of POE elastomer are added, and the internal mixer is turned on for mixing, when the temperature is raised to 115°C, 10g of talc, 4.5g of coffee residue, 1g of L-arginine, 6g of wear-resistant modifying component and 0.7g of stearic acid are added, when the temperature is raised to 125°C, 0.5g of dicumyl peroxide and 2.5g of azodicarbonamide are added, and the mixture is mixed for 5min to obtain a mixture;

[0082] (2) The mixture obtained in step (1) is put into an open mill for mixing, the roller temperature of the open mill is set to 85°C, the roller gap is 4mm, and after the mixture is uniformly mixed, the temperature of the final sheet is controlled to 70°C, the sheet thickness is 5mm, and the open-mixed material is obtained;

[0083] (3) The open-mixed material is placed in a foaming mold for foaming treatment, the foaming temperature is set to 165°C, the foaming pressure is 12MPa, the foaming time is 12min, the foamed semi-finished product is naturally cooled for 45h, and a foamed sheet is obtained;

[0084] (4) The obtained foamed sheet is cut and trimmed to prepare a shoe pad composite material.

[0085] The preparation method of the wear-resistant modifying component is the same as that in Example 1.

[0086] Comparative Example 4

[0087] Preparation of a shoe pad composite material

[0088] (1) The temperature of the internal mixer was raised to 105°C, 50 g of EVA and 25 g of POE elastomer were added, and the internal mixer was opened for mixing. When the temperature rose to 115°C, 10 g of talcum powder, 5.5 g of functional additives, 6 g of mullite fibers and 0.7 g of stearic acid were added. When the temperature rose to 125°C, 0.5 g of dicumyl peroxide and 2.5 g of azodicarbonamide were added, and mixing was carried out for 5 min to obtain a mixture;

[0089] (2) The mixture obtained in step (1) was put into an open mill for mixing, the roller temperature of the open mill was set to 85°C, the roller gap was 4 mm, and after the mixture was uniformly mixed, the temperature of the finally discharged sheet was controlled at 70°C, the discharged sheet thickness was 5 mm, and the mixed material after opening was obtained;

[0090] (3) The mixed material after opening was placed in a foaming mold for foaming treatment, the foaming temperature was set to 165°C, the foaming pressure was 12 MPa, and the foaming time was 12 min. The semi-finished product after foaming was naturally cooled for 45 h to obtain a foamed sheet;

[0091] (4) The obtained foamed sheet was cut and trimmed to prepare a shoe pad composite material.

[0092] The preparation method of the functional additives was the same as that of Example 1.

[0093] Comparative Example 5

[0094] Preparation of a shoe pad composite material

[0095] (1) The temperature of the internal mixer was raised to 105°C, 50 g of EVA and 25 g of POE elastomer were added, and the internal mixer was opened for mixing. When the temperature rose to 115°C, 10 g of talcum powder and 0.7 g of stearic acid were added. When the temperature rose to 125°C, 0.5 g of dicumyl peroxide and 2.5 g of azodicarbonamide were added, and mixing was carried out for 5 min to obtain a mixture;

[0096] (2) The mixture obtained in step (1) was put into an open mill for mixing, the roller temperature of the open mill was set to 85°C, the roller gap was 4 mm, and after the mixture was uniformly mixed, the temperature of the finally discharged sheet was controlled at 70°C, the discharged sheet thickness was 5 mm, and the mixed material after opening was obtained;

[0097] (3) The mixed material after opening was placed in a foaming mold for foaming treatment, the foaming temperature was set to 165°C, the foaming pressure was 12 MPa, and the foaming time was 12 min. The semi-finished product after foaming was naturally cooled for 45 h to obtain a foamed sheet;

[0098] (4) The obtained foamed sheet was cut and trimmed to prepare a shoe pad composite material.

[0099] Performance detection

[0100] The shoe pad composite materials prepared in Example 1 to Example 3 and Comparative Example 1 to Comparative Example 5 of the present application were made into samples meeting the specifications, the antibacterial rate of the samples was tested according to GB / T 31402-2023 "Determination of antibacterial activity on the surface of plastics and other non-porous materials", the test bacteria was Staphylococcus aureus; the wear resistance of the samples was tested according to GB / T 5478-2008 "Plastics - Rolling abrasion test method"; the samples were respectively placed in a sealed box, then 60 ppm concentration of isovaleric acid was introduced into the sealed box, then it was placed for 10 min, the gas concentration remaining in the respective flasks after a specified time from the standing was detected by a TVOC detection instrument, the deodorization rate after a specified time was calculated, and the specific test results are shown in Table 1:

[0101] Table 1 - Performance test

[0102] Antibacterial rate (%) Wear rate (%) 60 min deodorizing rate (%) Example 1 99.1 0.15 95 Example 2 99.5 0.10 99 Example 3 99.3 0.13 97 Comparative Example 1 99.0 1.81 94 Comparative Example 2 62.7 0.18 64 Comparative Example 3 89.5 0.16 85 Comparative Example 4 99.0 0.56 94 Comparative Example 5 59.2 1.94 61

[0103] From the test results in Table 1, it can be seen that the samples prepared in Example 1 to Example 3 have good antibacterial and deodorizing properties and wear resistance; the sample prepared in Comparative Example 1 does not add wear-resistant modified components, and the wear resistance of the sample is poorer than that of the examples; the sample prepared in Comparative Example 2 does not add functional additives, and the antibacterial and deodorizing properties of the sample are not as good as those of the examples; the sample prepared in Comparative Example 3 uses coffee grounds and L-arginine to replace functional additives, and the antibacterial and deodorizing properties of the sample are poorer than those of the examples; the sample prepared in Comparative Example 4 uses mullite fiber to replace the wear-resistant modified component, and the mullite fiber may not be organically modified, and agglomeration occurs in the matrix, resulting in a decrease in the wear resistance of the sample; the sample prepared in Comparative Example 5 does not add functional additives and wear-resistant modified components, so the performance of the sample is poor.

[0104] The above content is only an example and description of the concept of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the concept of the present application or exceed the scope defined by the present claims, which shall fall within the protection scope of the present application.

Claims

1. A composite material for insoles with antibacterial and deodorizing functions, characterized in that: The invention comprises the following raw materials in parts by weight: 40 to 60 parts of EVA, 20 to 30 parts of POE elastomer, 5 to 15 parts of talc, 4 to 6 parts of functional additives, 3 to 7 parts of wear-resistant modification components, 0.5 to 0.9 parts of stearic acid, 0.4 to 0.6 parts of cross-linking agent, and 2 to 3 parts of foaming agent; The preparation method of the functional additive comprises the following steps: S1: Drying the coffee grounds at 70-90°C for 4-8 hours, placing them in a glass fiber sleeve, and then placing them in an extraction tube. Adding a solvent to a flask, and controlling the temperature at 80-90°C, performing 4-6 reflux operations, each reflux time being 8-12 minutes, and then drying the deoiled coffee grounds to obtain pretreated coffee grounds. S2: Under nitrogen protection, the pretreated coffee grounds are added to N,N-dimethylformamide and ultrasonically dispersed for 20-30 minutes. Then, isocyanoethyl methacrylate and a tin catalyst are added. After the addition is completed, the temperature is raised to 70-80°C, and the mixture is stirred at this temperature for 5-7 hours. The mixture is allowed to settle, and the solid material is collected, washed, and vacuum-dried to obtain the modified coffee grounds. S3: Mix the modified coffee grounds with deionized water, pour into a reactor, start stirring until a uniform dispersion is formed, add L-arginine, stir at a temperature of 25-30°C for 6-8 hours, and separate the product to obtain the functional additive.

2. The insole composite material with antibacterial and deodorizing functions according to claim 1, characterized in that: In step S1, the solvent is n-hexane, and in step S2, the tin catalyst is any one of dibutyltin didodecylsulfide, stannous octoate, or dibutyltin dilaurate.

3. The insole composite material with antibacterial and deodorizing functions according to claim 1, characterized in that: In step S3, the mass ratio of the modified coffee grounds to L-arginine is 1:0.1-0.

3.

4. The insole composite material with antibacterial and deodorizing functions according to claim 1, characterized in that: The preparation method of the wear-resistant modified component comprises the following steps: SS1: Mullite fiber is mixed with deionized water and ultrasonically treated for 30 to 50 minutes. Dopamine is then added and the pH value of the system is adjusted with Tris-HCl buffer. The mixture is stirred at room temperature for 12 to 36 hours. The mixture is allowed to settle and the solid material is collected, washed, and vacuum-dried to obtain modified mullite fiber. SS2: Ultrasonic disperse 4g of modified mullite fiber in deionized water, add 3g of aluminum nitrate, stir at room temperature for 35-45min, then add ammonia water, stir for 30-50min, filter, wash and dry to obtain the wear-resistant modified component.

5. The insole composite material with antibacterial and deodorizing functions according to claim 4, characterized in that: In step SS1, the pH value of the system is 8-9.

6. The insole composite material with antibacterial and deodorizing functions according to claim 4, characterized in that: In step SS2, the mass fraction of the ammonia water is 10% to 60%.

7. The insole composite material with antibacterial and deodorizing functions according to claim 1, characterized in that: The preparation method of the insole composite material comprises the following steps: (1) The temperature of the internal mixer is raised to 100-110° C., EVA and POE elastomer are added, and the internal mixer is opened for internal mixing. When the temperature is raised to 110-120° C., talcum powder, functional additives, wear-resistant modification components and stearic acid are added. When the temperature is raised to 120-130° C., a crosslinking agent and a foaming agent are added, and mixing is carried out for 3-6 minutes to obtain a mixed material; (2) The mixed material obtained in step (1) is put into an open mill for mixing, and the roller temperature of the open mill is set to 80-90° C., the roller gap is 2-6 mm, and after the mixing is uniform, the temperature of the final sheet is controlled at 40-70° C., and the sheet thickness is 4-7 mm, to obtain the material after the opening; (3) placing the material after the open mill into a foaming mold for foaming, and naturally cooling the semi-finished product after foaming for 40 to 50 hours to obtain a foamed sheet; (4) The obtained foamed sheet is sliced ​​and cut to obtain a shoe insole composite material.

8. The insole composite material with antibacterial and deodorizing functions according to claim 7, characterized in that: In step (1), the cross-linking agent is any one of 1,4-di-tert-butyl peroxide isopropyl benzene or diisopropyl benzene peroxide; the foaming agent is any one of azodicarbonamide, sodium bicarbonate, ammonium bicarbonate or expandable microspheres.

9. The insole composite material with antibacterial and deodorizing functions according to claim 8, characterized in that: In step (3), during the foaming treatment, the foaming temperature is set to 160-170° C., the foaming pressure is set to 10-15 MPa, and the foaming time is set to 10-15 min.

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