High-efficiency composite protein aldehyde removing agent

Abstract

This invention discloses a high-efficiency composite protein formaldehyde remover, belonging to the technical field of formaldehyde remover technology. The high-efficiency composite protein formaldehyde remover comprises the following raw materials: modified protein liquid, gelatin, bamboo charcoal powder, fragrance essential oil, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, citric acid solution, and papain solution. The high-efficiency composite protein formaldehyde remover obtained by this invention uses non-toxic, environmentally friendly, and inexpensive raw materials, and has the advantages of being non-toxic, odorless, highly efficient in formaldehyde removal, free of secondary pollution, freshening the air, low in cost, and widely applicable.

Description

Technical Field

[0001] This invention relates to the field of formaldehyde removal agents, and in particular to a highly efficient composite protein formaldehyde removal agent. Background Technology

[0002] Formaldehyde is an important organic raw material, commonly used in the production of paints, plastic products, and adhesives such as urea-formaldehyde resin and phenol-formaldehyde resin. Adhesives are used in the manufacture of some furniture and in the installation of artificial boards for walls and floors during room renovations. Residual free formaldehyde in these materials is slowly released, resulting in higher formaldehyde levels in newly renovated rooms. Formaldehyde has been recognized by the World Health Organization as a teratogenic and carcinogenic substance with high toxicity. Long-term exposure to low concentrations of formaldehyde can cause headaches, weakened immunity, memory loss, depression, respiratory dysfunction, and liver toxicity, among other physical ailments. More seriously, it can lead to cancers such as lymphoma and leukemia. According to statistics, over 90% of childhood leukemia patients develop the disease within one year of moving into a newly renovated home. Formaldehyde poses a significant threat to human health, therefore many researchers are dedicated to developing formaldehyde removal agents that are highly efficient and environmentally friendly.

[0003] Currently, formaldehyde removal products mainly achieve formaldehyde removal through three methods: physical adsorption, chemical capture / degradation, and photocatalytic decomposition. However, these methods have the following drawbacks: Formaldehyde removal agents that rely solely on physical adsorption, such as activated carbon, not only cease absorbing formaldehyde after reaching adsorption equilibrium but also release it back into the air due to changes in ambient temperature and humidity, leading to unstable removal efficiency and potential secondary pollution. While chemically captured / degraded formaldehyde agents offer the advantage of irreversibility, they still suffer from drawbacks such as high compound toxicity, lack of environmental friendliness, easy agent detachment, and low utilization efficiency. For example, 2-imidazolidineone, used as a formaldehyde capture agent, is classified as poisonous; long-term use not only pollutes the environment but also harms human health. Furthermore, formaldehyde removal agents that decompose formaldehyde under photocatalytic conditions are limited by environmental constraints. Since photocatalysis generates positive and negative electrons under strong ultraviolet light, its effectiveness in removing formaldehyde under natural light or no light is extremely limited, and it is also expensive, restricting its application.

[0004] In conclusion, there is an urgent need for a new type of formaldehyde removal agent that has the advantages of high formaldehyde removal efficiency, non-toxicity and environmental friendliness, wide application range and low cost. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a highly efficient composite protein formaldehyde remover, which solves the problems of unstable formaldehyde removal effect, lack of environmental friendliness, low long-term effectiveness, and easy detachment of the agent. At the same time, it solves the problem of formaldehyde removers being limited by the application environment, thereby improving the formaldehyde removal effect and application range of the formaldehyde remover.

[0006] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0007] A highly efficient composite protein formaldehyde remover comprises the following raw materials: modified protein liquid, gelatin, bamboo charcoal powder, fragrance, 2,6-di-tert-butyl-4-methylphenol, calcium carbonate powder, citric acid solution, and papain solution.

[0008] Furthermore, the preparation process of the highly efficient composite protein formaldehyde remover is as follows:

[0009] 1) Heat the modified protein solution to 40°C and add gelatin. Stir until the gelatin dissolves. After the gelatin dissolves, add bamboo charcoal powder, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, and fragrance. Stir at 300-600 rpm for 1-2 hours to obtain a viscous mixed gelatin solution. Then pour the mixed gelatin solution into a mold and refrigerate at 4-10°C for 1-2 hours. Remove the mold to obtain gel balls for later use.

[0010] 2) Add the gel balls to the citric acid solution, stir for 1-2 hours, then add the papain solution, react at a constant temperature for 2-3 hours, filter to obtain porous gel balls, rinse the porous gel balls with water, place them in a 33℃ oven and dry for 0.5-0.8 hours, remove the porous gel balls and set aside for use;

[0011] 3) After irradiating the porous gel spheres with ultraviolet light at a wavelength of 380nm for 5-10 minutes, the spheres are removed to obtain a high-efficiency composite protein formaldehyde remover.

[0012] Furthermore, the raw materials are in the following weight proportions: 300-420 parts modified protein solution, 50-70 parts gelatin, 20-40 parts bamboo charcoal powder, 3-7 parts fragrance, 4-8 parts 2,6-di-tert-butyl-4-methylphenol, 4-8 parts natamycin, 10-22 parts calcium carbonate powder, 400-440 parts citric acid solution, and 70-100 parts papain solution.

[0013] Furthermore, the citric acid solution has a mass concentration of 2-4%.

[0014] Furthermore, the papain solution has a mass concentration of 10-16%.

[0015] This invention also discloses a method for preparing the modified protein solution, the specific process of which is as follows:

[0016] a) Mix sodium dodecyl sulfate with hot water at 55-65℃, stir until homogeneous to prepare a sodium dodecyl sulfate solution, add peanut protein powder and stir until homogeneous, then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution;

[0017] b) Add papain to the acidic solution and perform enzymatic hydrolysis at 55-65℃. After 3-4 hours, cool to room temperature, add magnesium chloride and stir for 1-2 hours. Then filter through a semi-permeable membrane to obtain the modified protein solution.

[0018] Furthermore, the concentration of the sodium dodecyl sulfate solution is 6 mmol / L, the mass ratio of the sodium dodecyl sulfate solution to peanut protein powder is 4:1, and the mass ratio of the acidic solution, papain, and magnesium chloride is 60:(2-4):1.

[0019] Furthermore, the fragrance can be a fragrance essential oil, perfume, or other substances that can emit fragrance, such as jasmine fragrance essential oil, lily fragrance essential oil, rose fragrance essential oil, green tea fragrance essential oil, and aloe vera fragrance essential oil.

[0020] Furthermore, the particle size of the bamboo charcoal powder is 5-10 μm.

[0021] Peanut protein is rich in various amino acids, among which arginine, lysine, and histidine show particularly good formaldehyde capture effects, reaching up to 50%. However, direct use of peanut protein has a weak formaldehyde removal effect, requiring the release of these essential amino acids. Therefore, the peanut protein solution needs to be treated. Papain, a low-specificity proteolytic enzyme, acts on the peptide bonds formed by the carboxyl groups of L-arginine, L-lysine, glycine, and L-citrulline residues in proteins, hydrolyzing them to form polypeptides and improving formaldehyde absorption. Adding sodium dodecyl sulfate under acidic conditions significantly enhances papain activity, further hydrolyzing the peanut protein and resulting in a modified protein solution containing more amino acids, especially arginine, lysine, and histidine. This leads to the formation of porous gel spheres with abundant amino acids, further improving formaldehyde removal. Because the amino acids are uniformly distributed within the porous gel, using the gel as a carrier, a long-lasting and stable formaldehyde removal effect can be achieved. In the preparation of the high-efficiency composite protein formaldehyde remover, calcium carbonate powder is added. The calcium carbonate powder inside the gel spheres can react with citric acid solution to generate carbon dioxide gas, thus forming numerous micropores inside the gel spheres. The added papain further hydrolyzes and erodes the proteins in the gel spheres, forming gel spheres with a porous structure. Then, ultraviolet treatment can deactivate the papain and prevent it from continuing to hydrolyze the proteins. The adsorption surface area of ​​the porous gel spheres increases, the adsorption capacity is improved, and the formaldehyde removal effect is further enhanced.

[0022] Gelatin is a protein obtained from the partial hydrolysis of collagen. Formaldehyde is a highly reactive small-molecule organic compound that can undergo nucleophilic addition reactions with molecules containing hydroxyl, thiol, and amino groups. Therefore, the amino acids in porous gel balls made from gelatin can react with formaldehyde, and the gelatin in the porous gel balls can further react with formaldehyde, achieving a dual formaldehyde removal effect. Bamboo charcoal powder is added to the porous gel balls because bamboo charcoal powder has excellent adsorption properties. It not only deodorizes and purifies the air but also enhances the adsorption of formaldehyde by the porous gel balls, thus improving the formaldehyde removal effect.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The high-efficiency composite protein formaldehyde remover prepared by this invention not only has high formaldehyde removal efficiency and good long-lasting effect, with a formaldehyde removal rate of over 60% in 0-4 days and a formaldehyde removal rate of over 80% in 4-12 days, but also deodorizes and purifies the air, is environmentally friendly and non-toxic, and does not harm the environment or human body. It also has the advantages of wide application range and low price. Detailed Implementation

[0025] The present invention will be described in detail below with reference to specific embodiments:

[0026] Example 1:

[0027] To prepare a highly efficient composite protein formaldehyde remover, a modified protein solution needs to be prepared first. The preparation process of the modified protein solution is as follows:

[0028] a) Mix sodium dodecyl sulfate with hot water at 55°C and stir until homogeneous to prepare a 6 mmol / L sodium dodecyl sulfate solution. Mix peanut protein powder with the sodium dodecyl sulfate solution at a mass ratio of 1:4 and stir until homogeneous. Then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution.

[0029] b) Add 1 / 30 of the acidic solution's mass of papain to the acidic solution and perform enzymatic hydrolysis at 55°C. After 3 hours, cool to room temperature, add 1 / 60 of the acidic solution's mass of magnesium chloride, stir for 1 hour, and then filter through a semi-permeable membrane to obtain the modified protein solution.

[0030] Weigh the raw materials for the high-efficiency compound protein formaldehyde remover: 300g modified protein liquid, 50g gelatin, 20g bamboo charcoal powder with a particle size of 5-10um, 3g jasmine essential oil, 4g 2,6-di-tert-butyl-4-methylphenol, 4g natamycin, 10g calcium carbonate powder, 400g 2% citric acid solution, and 70g 10% papain solution.

[0031] The preparation process of the high-efficiency composite protein formaldehyde remover is as follows:

[0032] 1) Heat the modified protein solution to 40°C and add gelatin. Stir until the gelatin dissolves. After the gelatin dissolves, add bamboo charcoal powder with a particle size of 5-10 μm, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, and jasmine essential oil. Stir at 300 rpm for 1 hour to obtain a viscous mixed gelatin solution. Then pour the mixed gelatin solution into a mold, refrigerate at 4°C for 1 hour, and then remove it to obtain gel balls for later use.

[0033] 2) Add the gel balls to the citric acid solution, stir for 1 hour, then add the papain solution, react at a constant temperature for 2 hours, filter to obtain porous gel balls, rinse the porous gel balls with water, place them in a 33℃ oven and dry for 0.5 hours, then remove the porous gel balls and set aside for use.

[0034] 3) A highly efficient composite protein formaldehyde remover was prepared by irradiating porous gel spheres under ultraviolet light with a wavelength of 380 nm for 5 min.

[0035] Example 2:

[0036] To prepare a highly efficient composite protein formaldehyde remover, a modified protein solution needs to be prepared first. The preparation process of the modified protein solution is as follows:

[0037] a) Mix sodium dodecyl sulfate with hot water at 60°C and stir until homogeneous to prepare a 6 mmol / L sodium dodecyl sulfate solution. Mix peanut protein powder with the sodium dodecyl sulfate solution at a mass ratio of 1:4 and stir until homogeneous. Then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution.

[0038] b) Papain (1 / 20 of the mass of the acidic solution) was added to the acidic solution and enzymatically hydrolyzed at 55°C for 3.5 h. After cooling to room temperature, magnesium chloride (1 / 60 of the mass of the acidic solution) was added and stirred for 1.5 h. The mixture was then filtered through a semi-permeable membrane to obtain the modified protein solution.

[0039] Weigh the raw materials for the high-efficiency compound protein formaldehyde remover: 360g modified protein liquid, 60g gelatin, 30g bamboo charcoal powder with a particle size of 5-10um, 5g jasmine essential oil, 6g 2,6-di-tert-butyl-4-methylphenol, 6g natamycin, 16g calcium carbonate powder, 420g citric acid solution with a mass concentration of 3%, and 85g papain solution with a mass concentration of 13%.

[0040] The preparation process of the high-efficiency composite protein formaldehyde remover is as follows:

[0041] 1) After heating the modified protein solution to 40°C, add gelatin and stir until the gelatin dissolves. After the gelatin dissolves, add bamboo charcoal powder with a particle size of 5-10 μm, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, and jasmine essential oil. Stir at 450 rpm for 1.5 h to obtain a viscous mixed gelatin solution. Then pour the mixed gelatin solution into a mold, refrigerate at 7°C for 1.5 h, and then remove it to obtain gel balls for later use.

[0042] 2) Add the gel balls to the citric acid solution, stir for 1.5 h, then add the papain solution, react at a constant temperature for 2.5 h, filter to obtain porous gel balls, rinse the porous gel balls with water, place them in a 33℃ oven and dry for 0.65 h, then remove the porous gel balls and set aside for use.

[0043] 3) A highly efficient composite protein formaldehyde remover was prepared by irradiating porous gel spheres under ultraviolet light with a wavelength of 380 nm for 7 minutes.

[0044] Example 3:

[0045] To prepare a highly efficient composite protein formaldehyde remover, a modified protein solution needs to be prepared first. The preparation process of the modified protein solution is as follows:

[0046] a) Mix sodium dodecyl sulfate with hot water at 65°C and stir until homogeneous to prepare a 6 mmol / L sodium dodecyl sulfate solution. Mix peanut protein powder with the sodium dodecyl sulfate solution at a mass ratio of 1:4 and stir until homogeneous. Then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution.

[0047] b) Papain (1 / 15 of the mass of the acidic solution) was added to the acidic solution and enzymatically hydrolyzed at 65°C for 4 hours. After cooling to room temperature, magnesium chloride (1 / 60 of the mass of the acidic solution) was added and stirred for 2 hours. The mixture was then filtered through a semi-permeable membrane to obtain the modified protein solution.

[0048] Weigh the raw materials for the high-efficiency compound protein formaldehyde remover: 420g modified protein liquid, 70g gelatin, 40g bamboo charcoal powder with a particle size of 5-10um, 7g fragrance essential oil, 8g 2,6-di-tert-butyl-4-methylphenol, 8g natamycin, 22g calcium carbonate powder, 440g citric acid solution with a mass concentration of 4%, and 100g papain solution with a mass concentration of 16%.

[0049] The preparation process of the high-efficiency composite protein formaldehyde remover is as follows:

[0050] 1) Heat the modified protein solution to 40°C and add gelatin. Stir until the gelatin dissolves. After the gelatin dissolves, add bamboo charcoal powder with a particle size of 5-10 μm, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, and jasmine essential oil. Stir at 600 rpm for 2 hours to obtain a viscous mixed gelatin solution. Then pour the mixed gelatin solution into a mold, refrigerate at 10°C for 2 hours, and then remove it to obtain gel balls for later use.

[0051] 2) Add the gel balls to the citric acid solution, stir for 2 hours, then add the papain solution, react at a constant temperature for 3 hours, filter to obtain porous gel balls, rinse the porous gel balls with water, place them in a 33℃ oven and dry for 0.8 hours, then remove the porous gel balls and set aside for use.

[0052] 3) A highly efficient composite protein formaldehyde remover was prepared by irradiating porous gel spheres under ultraviolet light with a wavelength of 380 nm for 10 min.

[0053] Comparative Example 1:

[0054] The formaldehyde removal agent of Comparative Example 1 is compared with the high-efficiency composite protein formaldehyde removal agent of Example 3. The main difference is that the formaldehyde removal agent of Comparative Example 1 does not use gelatin and bamboo charcoal powder in the preparation process, but directly uses the prepared modified protein liquid as the formaldehyde removal agent.

[0055] The preparation process of the formaldehyde removal agent is as follows:

[0056] a) Mix sodium dodecyl sulfate with hot water at 65°C and stir until homogeneous to prepare a 6 mmol / L sodium dodecyl sulfate solution. Mix peanut protein powder with the sodium dodecyl sulfate solution at a mass ratio of 1:4 and stir until homogeneous. Then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution.

[0057] b) Add papain (1 / 15 of the mass of the acidic solution) to the acidic solution and perform enzymatic hydrolysis at 65°C. After 4 hours, cool to room temperature, add magnesium chloride (1 / 60 of the mass of the acidic solution) and stir for 2 hours. Then filter with a semi-permeable membrane to obtain the modified protein solution. Use the modified protein solution as an aldehyde removal agent and put it into a pressure vessel.

[0058] Comparative Example 2:

[0059] The formaldehyde removal agent of Comparative Example 2 is compared with the high-efficiency composite protein formaldehyde removal agent of Example 3. The main difference is that the formaldehyde removal agent of Comparative Example 2 does not use gelatin and bamboo charcoal powder in its preparation process. Instead, it directly uses the prepared modified protein liquid as the formaldehyde removal agent. Furthermore, sodium dodecyl sulfate is not used in the preparation process of the modified protein liquid.

[0060] The preparation process of the formaldehyde removal agent is as follows:

[0061] a) Mix peanut protein powder with hot water at 65℃ in a mass ratio of 1:4 and stir until homogeneous. Then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution.

[0062] b) Add papain (1 / 15 of the mass of the acidic solution) to the acidic solution and perform enzymatic hydrolysis at 65°C. After 4 hours, cool to room temperature, add magnesium chloride (1 / 60 of the mass of the acidic solution) and stir for 2 hours. Then filter with a semi-permeable membrane to obtain the modified protein solution. Use the modified protein solution as an aldehyde removal agent and put it into a pressure vessel.

[0063] Comparative Example 3:

[0064] The formaldehyde removal agent of Comparative Example 3 is compared with the high-efficiency composite protein formaldehyde removal agent of Example 3. The main difference is that the formaldehyde removal agent of Comparative Example 3 does not use modified protein liquid in its preparation process. It is prepared with gelatin and bamboo charcoal powder as the main raw materials and water is used instead of the modified protein liquid in Example 3.

[0065] Weigh the raw materials for the formaldehyde removal agent: 420g water, 70g gelatin, 40g bamboo charcoal powder with a particle size of 5-10um, 7g fragrance essential oil, 8g 2,6-di-tert-butyl-4-methylphenol, 8g natamycin, 22g calcium carbonate powder, 440g citric acid solution with a mass concentration of 4%, and 100g papain solution with a mass concentration of 16%.

[0066] The preparation process of the formaldehyde removal agent is as follows:

[0067] 1) Heat water to 40℃ and add gelatin. Stir until the gelatin dissolves. After the gelatin dissolves, add bamboo charcoal powder with a particle size of 5-10μm, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, and jasmine essential oil. Stir at 600rpm for 2 hours to obtain a viscous mixed gelatin solution. Then pour the mixed gelatin solution into a mold, refrigerate at 10℃ for 2 hours, and then remove it to obtain gel balls for later use.

[0068] 2) Add the gel balls to the citric acid solution, stir for 2 hours, then add the papain solution, react at a constant temperature for 3 hours, filter to obtain porous gel balls, rinse the porous gel balls with water, place them in a 33℃ oven and dry for 0.8 hours, then remove the porous gel balls and set aside for use.

[0069] 3) A highly efficient composite protein formaldehyde remover was prepared by irradiating porous gel spheres under ultraviolet light with a wavelength of 380 nm for 10 min.

[0070] Comparative Example 4:

[0071] The formaldehyde removal agent of Comparative Example 4 is compared with the high-efficiency composite protein formaldehyde removal agent of Example 3. The main difference is that the formaldehyde removal agent of Comparative Example 4 did not undergo porous treatment of the gel spheres during the preparation process.

[0072] To prepare a highly efficient composite protein formaldehyde remover, a modified protein solution needs to be prepared first. The preparation process of the modified protein solution is as follows:

[0073] a) Mix sodium dodecyl sulfate with hot water at 65°C and stir until homogeneous to prepare a 6 mmol / L sodium dodecyl sulfate solution. Mix peanut protein powder with the sodium dodecyl sulfate solution at a mass ratio of 1:4 and stir until homogeneous. Then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution.

[0074] b) Add 1 / 15 of the acidic solution's mass of papain to the acidic solution and perform enzymatic hydrolysis at 65°C. After 4 hours, cool to room temperature, add 1 / 60 of the acidic solution's mass of magnesium chloride, and stir for 2 hours. Then filter the liquid through a semi-permeable membrane to obtain the modified protein solution.

[0075] Weigh the raw materials for the formaldehyde removal agent: 420g modified protein liquid, 70g gelatin, 40g bamboo charcoal powder with a particle size of 5-10um, 7g fragrance essential oil, 8g 2,6-di-tert-butyl-4-methylphenol, 8g natamycin, 22g calcium carbonate powder, 440g citric acid solution with a mass concentration of 4%, and 100g papain solution with a mass concentration of 16%.

[0076] The preparation process of the formaldehyde removal agent is as follows:

[0077] 1) After heating the modified protein solution to 40°C, add gelatin and stir until the gelatin dissolves. After the gelatin dissolves, add bamboo charcoal powder with a particle size of 5-10 μm, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, and jasmine essential oil. Stir at 600 rpm for 2 hours to obtain a viscous mixed gelatin solution. Then pour the mixed gelatin solution into a mold, refrigerate at 10°C for 2 hours, and then remove the gel balls to obtain the formaldehyde removal agent.

[0078] Formaldehyde Removal Experiment: The high-efficiency composite protein formaldehyde remover of Examples 1-3, the formaldehyde remover of Comparative Examples 1-4, and commercially available activated carbon were used in the formaldehyde removal experiment. The prepared formaldehyde solution with a mass concentration of 100 mg / L was sprayed into eight 1m×1m×1m sealed containers (spraying amount of 30 ml). The initial concentration of formaldehyde in the eight containers was measured using a formaldehyde tester. Then, the high-efficiency composite protein formaldehyde remover of Examples 1-3, the formaldehyde remover of Comparative Examples 3-4, and commercially available activated carbon were placed into six of the containers (amount of 50 g). The formaldehyde remover prepared in Comparative Examples 1-2 was sprayed into the remaining two containers (amount of 50 g). The mass concentration of formaldehyde in the eight containers was measured using a formaldehyde detector at 4d, 8d, and 12d.

[0079] The formaldehyde removal experiment results are shown in Table 1:

[0080] Table 1

[0081]

[0082]

[0083] Experimental data analysis:

[0084] 1. Compared with commercially available activated carbon, the formaldehyde removal agents of Examples 1-3 showed higher formaldehyde removal rates at 0-4 days, 4-8 days, and 8-12 days, indicating that the high-efficiency composite protein formaldehyde removal agent prepared by this invention is beneficial to improving the efficiency of formaldehyde removal. The formaldehyde removal agents of Examples 1-3 achieved a formaldehyde removal rate of over 60% at 0-4 days, and over 80% at 4-8 days and 8-12 days, while the formaldehyde removal rates of commercially available activated carbon at 4-8 days and 8-12 days were significantly lower than those at 0-4 days, indicating that the high-efficiency composite protein formaldehyde removal agent prepared by this invention has good long-lasting effect and can continuously and efficiently remove formaldehyde.

[0085] 2. Compared with the formaldehyde removal agents of Comparative Examples 1-4, the formaldehyde removal rates of the high-efficiency composite protein formaldehyde removal agents in Examples 1-3 were higher at 0-4d, 4-8d, and 8-12d. The formaldehyde removal rate of the formaldehyde removal agents in Examples 1-3 reached over 60% at 0-4d and over 80% at 4-8d and 8-12d, while the formaldehyde removal rates of the formaldehyde removal agents in Comparative Examples 1-4 were significantly lower at 4-8d and 8-12d compared to 0-4d. Compared to Example 3, Comparative Example 1 did not use gelatin or bamboo charcoal powder in the preparation of its formaldehyde removal agent; instead, it directly used the prepared modified protein solution as the formaldehyde removal agent. Therefore, the formaldehyde removal rate and long-lasting effect of Comparative Example 1 were worse than those of Example 3. Similarly, compared to Example 3, Comparative Example 2 did not use gelatin or bamboo charcoal powder in the preparation of its formaldehyde removal agent; instead, it directly used the prepared modified protein solution as the formaldehyde removal agent. Furthermore, sodium dodecyl sulfate was not used in the preparation of the modified protein solution. Therefore, the formaldehyde removal rate and long-lasting effect of Comparative Example 2 were worse than those of Example 3. Finally, compared to Example 3, Comparative Example 3's formaldehyde removal agent preparation... No modified protein solution was used in the process. The formaldehyde removal agent was prepared using gelatin and bamboo charcoal powder as the main raw materials. Water was used instead of the modified protein solution in Example 3. The formaldehyde removal rate and long-term effect of the formaldehyde removal agent in Comparative Example 3 were worse than those in Example 3. Compared with Example 3, the formaldehyde removal agent in Comparative Example 4 did not undergo porous treatment of the gel balls during its preparation process. The formaldehyde removal rate and long-term effect of the formaldehyde removal agent in Comparative Example 4 were worse than those in Example 3. This shows that the high-efficiency composite protein formaldehyde removal agent of the invention, through the joint treatment of sodium dodecyl sulfate, modified protein solution, and gelatin, as well as the porous treatment of the gel balls, improves the formaldehyde removal efficiency and long-term effect of the formaldehyde removal agent.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention. Technical aspects, shapes, and structures not described in detail in this invention are all well-known technologies.

Claims

1. A highly efficient composite protein formaldehyde remover, characterized in that, Includes the following steps: 1) Heat the modified protein solution to 40°C and add gelatin. Stir until the gelatin dissolves. After the gelatin dissolves, add bamboo charcoal powder, 2,6-di-tert-butyl-4-methylphenol, natamycin, calcium carbonate powder, and fragrance essential oil. Stir until a viscous mixed gelatin solution is obtained. Then pour the mixed gelatin solution into a mold, let it stand and refrigerate for 1-2 hours, and then take it out to obtain gel balls for later use. 2) Add the gel balls to the citric acid solution, stir for 1-2 hours, then add the papain solution, react at a constant temperature for 2-3 hours, filter to obtain porous gel balls, rinse the porous gel balls with water, place them in a 33℃ oven and dry for 0.5-0.8 hours, remove the porous gel balls and set aside for use; 3) After irradiating the porous gel spheres with ultraviolet light at a wavelength of 380nm for 5-10 minutes, the spheres are removed to obtain a high-efficiency composite protein formaldehyde remover. The raw materials are as follows by weight: 300-420 parts modified protein solution, 50-70 parts gelatin, 20-40 parts bamboo charcoal powder, 3-7 parts fragrance essential oil, 4-8 parts 2,6-di-tert-butyl-4-methylphenol, 4-8 parts natamycin, 10-22 parts calcium carbonate powder, 400-440 parts citric acid solution, and 70-100 parts papain solution; The preparation process of the modified protein solution is as follows: a) Mix sodium dodecyl sulfate with hot water at 55-65℃, stir until homogeneous to prepare a sodium dodecyl sulfate solution, add peanut protein powder and stir until homogeneous, then add acetic acid to adjust the pH to 6.3 to obtain an acidic solution; b) Add papain to the acidic solution and perform enzymatic hydrolysis at 55-65℃. After 3-4 hours, cool to room temperature, add magnesium chloride and stir for 1-2 hours. Then filter through a semi-permeable membrane to obtain the modified protein solution.

2. The high-efficiency composite protein formaldehyde remover according to claim 1, characterized in that, The citric acid solution has a mass concentration of 2-4%.

3. The high-efficiency composite protein formaldehyde remover according to claim 2, characterized in that, The papain solution has a mass concentration of 10-16%.

4. The high-efficiency composite protein formaldehyde remover according to claim 3, characterized in that, The concentration of the sodium dodecyl sulfate solution is 6 mmol / L, the mass ratio of the sodium dodecyl sulfate solution to peanut protein powder is 4:1, and the mass ratio of the acidic solution, papain, and magnesium chloride is 60:(2-4):

1.

5. The high-efficiency composite protein formaldehyde remover according to claim 4, characterized in that, The bamboo charcoal powder has a particle size of 5-10 μm.

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