High-performance regenerated sponge and preparation method thereof
By using treated antibacterial agents such as silica and eugenol in the regenerated sponge, the problem of insufficient antibacterial performance of regenerated sponge in the prior art is solved, and efficient bacterial inhibition and long-lasting environmental protection effects are achieved.
Patent Information
- Application Number
- CN202411384704.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2024-12-06
AI Technical Summary
The antibacterial properties of regenerated sponges in the prior art cannot be guaranteed, resulting in environmental damage caused by industrial waste that is not easy to decompose in the natural environment.
The dispersion of silica is increased by adding silica to the regenerated sponge as a bacteriostatic inhibitor and reacting with polyhexamethyleneguanidine hydrochloride after treatment with silane coupling agent, and combining eugenol and dodecane Sodium sulfate can improve the antibacterial properties of sponges.
It significantly improves the antibacterial properties of the regenerated sponge, can effectively adsorb and kill bacteria, maintain a long-term antibacterial effect, and still has excellent antibacterial properties after multiple washes.
Smart Images
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Abstract
Description
Technical Field
[0001] The present application relates to the technical field of sponge processing, and in particular to a high-performance regenerated sponge and a preparation method thereof. Background Art
[0002] As people's living standards continue to improve, the demand for soft furniture is also increasing. Every year, countless sponge mattresses, sofas, sponge pillows, car seats and other sponge products are produced, with an annual demand of nearly 2.5 million tons of sponges. Manufacturers will produce 20% of waste sponge scraps in the process of producing products. On the one hand, factories will produce a large amount of worthless scraps that cannot be used in the process of producing sponge products, creating a lot of industrial waste; on the other hand, people discard a large number of discarded mattresses, sofas and other furniture products every year, resulting in a large amount of social garbage. These garbage are not easy to decompose in the natural environment, causing environmental damage.
[0003] In the prior art, the reprocessing of sponges is simply to re-crush the discarded sponges and then integrate them into new sponges. The above operation may easily lead to the antibacterial property of the regenerated sponges being unable to be guaranteed. Summary of the invention
[0004] In order to improve the antibacterial performance of the regenerated sponge, the present application provides a high-performance regenerated sponge and a preparation method thereof.
[0005] In the first aspect, the present application provides a high-performance regenerated sponge, which adopts the following technical solution: A high-performance regenerated sponge comprises the following raw materials in parts by weight: 100-120 parts of waste sponges, 25-35 parts of polyether, 20-24 parts of toluenediamine, 11-13 parts of adhesives, and 8-10 parts of antibacterial agents, wherein the antibacterial agent comprises silicon dioxide.
[0006] By adopting the above technical solution, adding the antibacterial agent made of silicon dioxide to the regenerated sponge can improve the antibacterial performance of the regenerated sponge. The specific reasons are as follows: The static electricity on the surface of silica can adsorb and kill the surrounding bacteria. There are a large number of hydrogen bonds and hydrophilic groups on the surface of silica, which can adsorb foreign substances to block the living environment of bacteria. Therefore, when silica is added to the regenerated sponge, it can play a better antibacterial role.
[0007] Preferably, the modified preparation method of silicon dioxide comprises the following steps: S100, adding silica and a silane coupling agent into toluene for reflux reaction, and then washing and drying the product after centrifugation to obtain pretreated silica; S200, adding pretreated silica and polyhexamethyleneguanidine hydrochloride to N,N-dimethylformamide, heating and stirring evenly, and then centrifuging the product, washing and drying to obtain modified silica.
[0008] By adopting the above technical scheme, the silicon dioxide is treated with a silane coupling agent so that the surface of the silicon dioxide has epoxy groups, and then the silicon dioxide with epoxy groups on the surface is reacted with polyhexamethyleneguanidine hydrochloride so that the polyhexamethyleneguanidine hydrochloride surrounds the silicon dioxide with epoxy groups on the surface, thereby effectively reducing the agglomeration of silicon dioxide and improving the dispersibility of silicon dioxide in the system.
[0009] In addition, polyhexamethyleneguanidine hydrochloride is adsorbed to the surface of bacteria through Coulomb force, because the surface of bacteria is basically negatively charged, and then diffuses in through the cell wall and finally combines with the cytoplasmic membrane, causing it to rupture, thereby playing a better antibacterial effect.
[0010] Preferably, the mass ratio of silicon dioxide to polyhexamethyleneguanidine hydrochloride is 1:(8-10).
[0011] By adopting the above technical solution, the mass ratio of silicon dioxide and polyhexamethyleneguanidine hydrochloride is controlled within the above range, which can effectively improve the dispersibility of silicon dioxide in the system.
[0012] Preferably, the silane coupling agent is KH-560.
[0013] Preferably, the antibacterial agent also includes eugenol, and the mass ratio of silicon dioxide to eugenol is 1:(0.74-0.88).
[0014] By adopting the above technical solution, eugenol contains hydroxyl groups, so eugenol can hydrogen bond with bacterial cell membranes through the hydroxyl groups, thereby improving the antibacterial properties of the regenerated sponge. The synergistic effect between eugenol and silica makes the antibacterial properties of the regenerated sponge have a positive effect of one plus one being greater than two.
[0015] Preferably, the modified preparation method of eugenol comprises the following steps: The diatomaceous earth is added into a mixed solution of ammonia water and anhydrous ethanol, and after ultrasonic dispersion, eugenol is added and stirred evenly to prepare the modified eugenol.
[0016] By adopting the above technical scheme, diatomaceous earth has the characteristics of high porosity, large specific surface area and strong adsorption. Therefore, after mixing diatomaceous earth and eugenol, the diatomaceous earth encapsulates eugenol, allowing eugenol to adhere to porous and porous surfaces, achieving the sustained release of eugenol and reducing the volatilization of eugenol, thereby improving the long-lasting antibacterial property of the regenerated sponge.
[0017] Preferably, the mass ratio of eugenol to diatomaceous earth is 1:(1.83-2.13).
[0018] By adopting the above technical solution and controlling the mass ratio of eugenol to diatomaceous earth within the above range, the sustained-release effect of eugenol can be further improved.
[0019] Preferably, the sponge also includes 4-6 parts of sodium lauryl sulfate.
[0020] By adopting the above technical scheme, sodium dodecyl sulfate is used to hydrophobically modify polyhexamethyleneguanidine hydrochloride, thereby improving the hydrophobicity of polyhexamethyleneguanidine hydrochloride, thereby making the sponge still have excellent antibacterial properties after multiple washings.
[0021] In addition, the dodecyl group on sodium dodecyl sulfate can increase the hydrophobicity of diatomaceous earth, thereby further improving the antibacterial performance of the sponge after multiple washings.
[0022] Preferably, the adhesive is acrylate.
[0023] In the first aspect, the present application provides a method for preparing a high-performance regenerated sponge as in the first aspect, which adopts the following technical solution: A method for preparing a high-performance regenerated sponge comprises the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are mixed evenly, heated, cooled and added with toluenediamine, stirred evenly, and then an adhesive and an antibacterial agent are added. After stirring evenly, the mixture is die-casted and demolded to obtain a recycled sponge.
[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The static electricity on the surface of silica can adsorb and kill the surrounding bacteria, and there are a large number of hydrogen bonds and hydrophilic groups on the surface of silica, which can adsorb foreign substances to block the living environment of bacteria. Therefore, when silica is added to the regenerated sponge, it can play a better antibacterial role.
[0025] 2. After being treated with a silane coupling agent, the surface of silica has epoxy groups, which then reacts with polyhexamethyleneguanidine hydrochloride, so that the polyhexamethyleneguanidine hydrochloride surrounds the silica with epoxy groups on the surface, effectively reducing the agglomeration of silica, thereby improving the dispersibility of silica in the system; and the polyhexamethyleneguanidine hydrochloride is adsorbed to the surface of bacteria through Coulomb force, thereby playing a good antibacterial effect. DETAILED DESCRIPTION
[0026] The present application is further described in detail below in conjunction with the examples and comparative examples. The raw materials involved in the present application can be obtained commercially, among which the polyether is provided by Nantong Chenrun Chemical Co., Ltd., and polyhexamethyleneguanidine hydrochloride is provided by Wuhan Xinli Biotechnology Co., Ltd.
[0027] Example 1 The recycled sponge includes the following raw materials: 110 g of waste sponge, 30 g of polyether, 22 g of toluenediamine, 12 g of adhesive, and 10 g of antibacterial agent.
[0028] The antibacterial agent includes silicon dioxide and the adhesive is acrylate.
[0029] The preparation method of the regenerated sponge comprises the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are evenly mixed, heated to 140°C for 2 hours, cooled to 80°C, added with toluene diamine, stirred at a stirring speed of 3000 rpm for 50 minutes, and then added with adhesive and antibacterial agent. After stirring at a stirring speed of 3000 rpm for 30 minutes, the mixture is die-casted into a mold and demolded to obtain the regenerated sponge.
[0030] Example 2 The recycled sponge includes the following raw materials: 100 g of waste sponge, 25 g of polyether, 20 g of toluenediamine, 11 g of adhesive, and 9 g of antibacterial agent.
[0031] The antibacterial agent includes silicon dioxide and the adhesive is acrylate.
[0032] The modified preparation method of silicon dioxide comprises the following steps: S100, adding 4 g of silica and 4 g of silane coupling agent into 50 g of toluene for reflux reaction for 12 h, then centrifuging the product at 10000 rpm for 10 min, washing with ethanol, and then drying in a constant temperature vacuum oven to obtain pretreated silica; S200, adding pretreated silica and 32 g of polyhexamethyleneguanidine hydrochloride to 40 g of N,N-dimethylformamide, stirring at 70°C for 14 h, then centrifuging the product at 10,000 rpm for 10 min, washing with ethanol, and drying in a constant temperature vacuum oven to obtain modified silica.
[0033] The silane coupling agent is KH-560.
[0034] The preparation method of the regenerated sponge comprises the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are evenly mixed, heated to 140°C for 2 hours, cooled to 80°C, added with toluene diamine, stirred at a stirring speed of 3000 rpm for 50 minutes, and then added with adhesive and antibacterial agent. After stirring at a stirring speed of 3000 rpm for 30 minutes, the mixture is die-casted into a mold and demolded to obtain the regenerated sponge.
[0035] Example 3 The recycled sponge includes the following raw materials: 120 g of waste sponge, 35 g of polyether, 24 g of toluenediamine, 13 g of adhesive, and 11 g of antibacterial agent.
[0036] The antibacterial agent includes silicon dioxide and the adhesive is acrylate.
[0037] The modified preparation method of silicon dioxide comprises the following steps: S100, adding 4 g of silica and 4 g of silane coupling agent into 50 g of toluene for reflux reaction for 12 h, then centrifuging the product at 10000 rpm for 10 min, washing with ethanol, and then drying in a constant temperature vacuum oven to obtain pretreated silica; S200, adding pretreated silica and 40 g of polyhexamethyleneguanidine hydrochloride to 40 g of N,N-dimethylformamide, stirring at 70° C. for 14 h, centrifuging the product at 10,000 rpm for 10 min, washing with ethanol, and drying in a constant temperature vacuum oven to obtain modified silica.
[0038] The silane coupling agent is KH-560.
[0039] The preparation method of the regenerated sponge comprises the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are evenly mixed, heated to 140°C for 2 hours, cooled to 80°C, added with toluene diamine, stirred at a stirring speed of 3000 rpm for 50 minutes, and then added with adhesive and antibacterial agent. After stirring at a stirring speed of 3000 rpm for 30 minutes, the mixture is die-casted into a mold and demolded to obtain the regenerated sponge.
[0040] Example 4 The recycled sponge includes the following raw materials: 110 g of waste sponge, 30 g of polyether, 22 g of toluenediamine, 12 g of adhesive, and 10 g of antibacterial agent.
[0041] The antibacterial agent includes silicon dioxide and the adhesive is acrylate.
[0042] The modified preparation method of silicon dioxide comprises the following steps: S100, adding 4 g of silica and 4 g of silane coupling agent into 50 g of toluene for reflux reaction for 12 h, then centrifuging the product at 10000 rpm for 10 min, washing with ethanol, and then drying in a constant temperature vacuum oven to obtain pretreated silica; S200, adding pretreated silica and 36 g of polyhexamethyleneguanidine hydrochloride to 40 g of N,N-dimethylformamide, stirring at 70° C. for 14 h, then centrifuging the product at 10,000 rpm for 10 min, washing with ethanol, and drying in a constant temperature vacuum oven to obtain modified silica.
[0043] The silane coupling agent is KH-560.
[0044] The preparation method of the regenerated sponge comprises the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are evenly mixed, heated to 140°C for 2 hours, cooled to 80°C, added with toluene diamine, stirred at a stirring speed of 3000 rpm for 50 minutes, and then added with adhesive and antibacterial agent. After stirring at a stirring speed of 3000 rpm for 30 minutes, the mixture is die-casted into a mold and demolded to obtain the regenerated sponge.
[0045] Example 5 The difference between Example 5 and Example 4 is that the mass ratio of silicon dioxide to polyhexamethyleneguanidine hydrochloride is 1:5.
[0046] Example 6 The difference between Example 6 and Example 4 is that the mass ratio of silicon dioxide to polyhexamethyleneguanidine hydrochloride is 1:13.
[0047] Example 7 The difference between Example 7 and Example 4 is that the antibacterial agent includes silicon dioxide and eugenol, and the mass ratio of silicon dioxide to eugenol is 1:0.81.
[0048] The preparation method of the antibacterial agent comprises the following steps: The silicon dioxide and eugenol are mixed and stirred evenly to prepare an antibacterial agent.
[0049] Example 8 The difference between Example 8 and Example 7 is that the mass ratio of silicon dioxide to eugenol in the antibacterial agent is 1:0.74.
[0050] The modified preparation method of eugenol comprises the following steps: 1.83 g of diatomaceous earth was added to a mixed solution of 30 g of aqueous ammonia and anhydrous ethanol (the mass ratio of aqueous ammonia to anhydrous ethanol was 1:4), and ultrasonically dispersed for 30 min at 50 Hz and 280 W. Then 1 g of eugenol was added and magnetically stirred for 3 h to obtain modified eugenol.
[0051] Example 9 The difference between Example 9 and Example 7 is that the mass ratio of silicon dioxide to eugenol in the antibacterial agent is 1:0.88.
[0052] The modified preparation method of eugenol comprises the following steps: 2.13 g of diatomaceous earth was added to a mixed solution of 30 g of ammonia water and anhydrous ethanol (the volume ratio of ammonia water to anhydrous ethanol was 1:4), and ultrasonically dispersed at 50 Hz and 280 W for 30 min. Then 1 g of eugenol was added and magnetically stirred for 3 h to obtain modified eugenol.
[0053] Example 10 The difference between Example 10 and Example 7 is that the mass ratio of silicon dioxide to eugenol in the antibacterial agent is 1:0.81.
[0054] The modified preparation method of eugenol comprises the following steps: 1.98 g of diatomaceous earth was added to a mixed solution of 30 g of ammonia water and anhydrous ethanol (the mass ratio of ammonia water to anhydrous ethanol was 1:4), and ultrasonically dispersed at 50 Hz and 280 W for 30 min. Then 1 g of eugenol was added and magnetically stirred for 3 h to obtain modified eugenol.
[0055] Embodiment 11 The difference between Example 11 and Example 10 is that the mass ratio of eugenol to diatomaceous earth is 1:1.70.
[0056] Example 12 The difference between Example 12 and Example 10 is that the mass ratio of eugenol to diatomaceous earth is 1:1.26.
[0057] Embodiment 13 The difference between Example 13 and Example 10 is that the sponge further includes 4 g of sodium lauryl sulfate.
[0058] That is, the recycled sponge includes the following raw materials: 110g of waste sponge, 30g of polyether, 22g of toluene diamine, 12g of adhesive, 9g of antibacterial agent, and 4g of sodium dodecyl sulfate.
[0059] The preparation method of the regenerated sponge comprises the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are evenly mixed, heated to 140°C for 2 hours, cooled to 80°C, added with toluene diamine, stirred at a stirring speed of 3000 rpm for 50 minutes, and then added with adhesive, antibacterial agent and sodium dodecyl sulfate. After stirring at a stirring speed of 3000 rpm for 30 minutes, the mixture is die-casted into a mold and demolded to obtain the regenerated sponge.
[0060] Embodiment 14 The difference between Example 14 and Example 13 is that the sponge further includes 6 g of sodium dodecyl sulfate.
[0061] Embodiment 15 The difference between Example 15 and Example 13 is that the sponge further includes 5 g of sodium lauryl sulfate.
[0062] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the sponge does not contain an antibacterial agent.
[0063] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the antibacterial agent includes eugenol.
[0064] Comparative Example 3 The difference between Comparative Example 3 and Example 4 is that the sponge further includes 4 g of sodium lauryl sulfate.
[0065] That is, the recycled sponge includes the following raw materials: 110g of waste sponge, 30g of polyether, 22g of toluene diamine, 12g of adhesive, 9g of antibacterial agent, and 4g of sodium dodecyl sulfate.
[0066] The antibacterial agent includes silicon dioxide and the adhesive is acrylate.
[0067] The preparation method of the regenerated sponge comprises the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are evenly mixed, heated to 140°C for 2 hours, cooled to 80°C, added with toluene diamine, stirred at a stirring speed of 3000 rpm for 50 minutes, and then added with adhesive, antibacterial agent and sodium dodecyl sulfate. After stirring at a stirring speed of 3000 rpm for 30 minutes, the mixture is die-casted into a mold and demolded to obtain the regenerated sponge.
[0068] Performance testing: (1) Antibacterial performance test The regenerated sponges prepared in Examples 1-15 and Comparative Examples 1-3 were cut into 5 mm × 5 mm slices, and the initial antibacterial rate test was performed according to the test method provided in GB / T20944.3-2008. After being placed for 7 days and washed 30 times, the antibacterial rate test was performed again, and the test results were recorded in Table 1, where the higher the antibacterial rate, the higher the antibacterial performance; the lower the decrease in the antibacterial rate, the higher the antibacterial performance.
[0069] Table 1 Data analysis Specifically combining the test results of Examples 2-4 and Example 1, the antibacterial rates of Staphylococcus aureus and Escherichia coli in the initial state of Examples 2-4 are 95.5-95.8%, and the antibacterial rates of Escherichia coli are 95.4-95.6%, and the antibacterial rates of Staphylococcus aureus and Escherichia coli in the initial state of Example 1 are 93.5% and 93.4%, respectively. The analysis is as follows: the difference between Examples 2-4 and Example 1 is that after the silicon dioxide is treated with a silane coupling agent, the surface of the silicon dioxide has epoxy groups, and then the silicon dioxide is reacted with polyhexamethyleneguanidine hydrochloride so that the polyhexamethyleneguanidine hydrochloride is surrounded by the outside of the silicon dioxide with epoxy groups on the surface, thereby improving the dispersibility of the silicon dioxide, and the polyhexamethyleneguanidine hydrochloride itself also has a good antibacterial effect, thereby improving the antibacterial performance of the sponge.
[0070] Specifically combining the test results of Example 7 and Example 4, the antibacterial rates of Staphylococcus aureus and Escherichia coli in the initial state of Example 7 are 97.4% and 97.2%, respectively. The antibacterial rates of Staphylococcus aureus and Escherichia coli in the initial state of Example 4 are 95.8% and 95.6%, respectively. The analysis is as follows: the difference between Example 7 and Example 4 is that the sponge also contains eugenol, which has antibacterial properties itself, and the synergistic effect between eugenol and silica makes the antibacterial property of the sponge have a positive effect of one plus one being greater than two, thereby improving the antibacterial property of the sponge.
[0071] Specifically combining the test results of Examples 8-10 and Example 7, the decrease in the antibacterial rate of Staphylococcus aureus in Examples 8-10 after 7 days of placement was 0.8-0.9%, and the decrease in the antibacterial rate of Escherichia coli was 0.7-0.8%. The decrease in the antibacterial rate of Staphylococcus aureus in Example 7 after 7 days of placement was 4.8%, and the decrease in the antibacterial rate of Escherichia coli was 4.6%. The analysis is as follows. The difference between Examples 8-10 and Example 7 is that diatomaceous earth embeds eugenol, which realizes the sustained release of eugenol and reduces the volatilization of eugenol, thereby improving the long-lasting antibacterial property of the sponge.
[0072] Specifically combining the test results of Examples 13-15 and Example 10, after washing 30 times with water, the decrease value of Staphylococcus aureus in Example 13 was 1.0-1.2%, and the decrease value of Escherichia coli was 1.1-1.2%. After washing 30 times with water in Example 10, the decrease value of Staphylococcus aureus was 4.3%, and the decrease value of Escherichia coli was 4.1%. The analysis is as follows. The difference between Examples 13-15 and Example 10 is that sodium dodecyl sulfate hydrophobically modifies polyhexamethylene guanidine hydrochloride, thereby improving the hydrophobicity of polyhexamethylene guanidine hydrochloride, and the dodecyl group on dialkyl sodium sulfate can improve the hydrophobicity of diatomaceous earth, thereby further improving the antibacterial performance of the sponge after multiple washings.
[0073] Specifically combining the test results of Example 1 and Comparative Example 1, the antibacterial rate of Staphylococcus aureus in the initial state of Example 1 is 93.5%, and the antibacterial rate of Escherichia coli is 93.4%. The antibacterial rate of Staphylococcus aureus in the initial state of Comparative Example 1 is 62.5%, and the antibacterial rate of Escherichia coli is 62.3%. The analysis is as follows. The difference between Example 1 and Comparative Example 1 is that the sponge contains an antibacterial agent made of silicon dioxide, and silicon dioxide itself has excellent antibacterial properties, thereby improving the antibacterial properties of the sponge.
[0074] Specifically combining the test results of Example 4 and Comparative Example 2, the antibacterial rates of Staphylococcus aureus and Escherichia coli in the initial state of Example 4 are 95.8% and 95.6%, respectively. The antibacterial rates of Staphylococcus aureus and Escherichia coli in the initial state of Comparative Example 2 are 92.8% and 92.5%, respectively. The difference between Example 4 and Comparative Example 2 is that the antibacterial agent contains silicon dioxide in addition to eugenol. The synergistic effect between eugenol and silicon dioxide makes the antibacterial performance of the sponge have a positive effect of one plus one being greater than two, thereby further improving the antibacterial performance of the sponge.
[0075] Specifically combining the test results of Comparative Example 3 and Example 4, the decrease in the antibacterial rate of Staphylococcus aureus after washing 30 times with water in Comparative Example 3 was 1.6%, and the antibacterial rate of Escherichia coli was 1.6%. The decrease in the antibacterial rate of Staphylococcus aureus after washing 30 times with water in Example 4 was 2.8%, and the antibacterial rate of Escherichia coli was 2.6%. The analysis is as follows. The difference between Comparative Example 3 and Example 4 is that sodium dodecyl sulfate hydrophobically modifies polyhexamethyleneguanidine hydrochloride, thereby improving the hydrophobicity of polyhexamethyleneguanidine hydrochloride, so that the sponge still has excellent antibacterial performance after multiple washings.
[0076] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A high-performance regenerated sponge, Features: The invention comprises the following raw materials in parts by weight: 100-120 parts of waste sponges, 25-35 parts of polyether, 20-24 parts of toluenediamine, 11-13 parts of adhesives, and 9-11 parts of antibacterial agents, wherein the antibacterial agent comprises silicon dioxide.
2. A high performance regenerated sponge according to claim 1, Features: The modified preparation method of silicon dioxide comprises the following steps: S100, adding silica and a silane coupling agent into toluene for reflux reaction, and then washing and drying the product after centrifugation to obtain pretreated silica; S200, adding pretreated silica and polyhexamethyleneguanidine hydrochloride to N,N-dimethylformamide, heating and stirring evenly, and then centrifuging the product, washing and drying to obtain modified silica.
3. A high performance regenerated sponge according to claim 2, Features: The mass ratio of silicon dioxide to polyhexamethyleneguanidine hydrochloride is 1:(8-10).
4. A high-performance regenerated sponge according to claim 2, Features: The silane coupling agent is KH-560.
5. A high performance regenerated sponge according to claim 2, Features: The antibacterial agent also includes eugenol, and the mass ratio of the silicon dioxide to eugenol is 1:(0.74-0.88).
6. A high-performance regenerated sponge according to claim 5, Features: The modified preparation method of eugenol comprises the following steps: The diatomaceous earth is added into a mixed solution of ammonia water and anhydrous ethanol, and after ultrasonic dispersion, eugenol is added and stirred evenly to prepare the modified eugenol.
7. A high performance regenerated sponge according to claim 6, Features: The mass ratio of eugenol to diatomaceous earth is 1:(1.83-2.13).
8. A high performance regenerated sponge according to claim 6, Features: The sponge also includes 4-6 parts of sodium lauryl sulfate.
9. The high-performance regenerated sponge according to claim 1, Features: The adhesive is acrylate.
10. A method for preparing the high-performance regenerated sponge as claimed in claim 1, comprising the following steps: The discarded sponges are classified, cleaned and crushed to obtain sponge fragments. The sponge fragments and polyether are mixed evenly, heated, cooled and added with toluenediamine, stirred evenly, and then an adhesive and an antibacterial agent are added. After stirring evenly, the mixture is die-casted and demolded to obtain a recycled sponge.