Preparation method of peculiar smell removing and urine absorbing material

Abstract

The invention relates to the technical field of peculiar smell removal materials, in particular to a preparation method of a peculiar smell removal urine absorption material, which comprises the following steps: step (1), dispersing 15-20 parts of powdery cellulose in 100 parts of water, step (2), uniformly mixing acrylamide and acrylic acid according to a molar ratio of (0.5-2): 1, step (3), adding a cross-linking agent Bis into a mixed solution of acrylamide and acrylic acid obtained in the step (2), and stirring uniformly to obtain the peculiar smell removal urine absorption material. (4) mixing the polyacrylamide-polyacrylic acid copolymer obtained in the step (3) with the cellulose dispersion liquid obtained in the step (1) according to a mass ratio of (0.45-3): 1, (5) adding TEMED and ammonium persulfate, and (6) soaking the polymer obtained in the step (5) in water for 48 hours, and drying the polymer in a drying oven. (7) preparing a metal ion reaction solution; and (8) completely immersing the intermediate product of the peculiar smell removing and urine absorbing material obtained in the step (6) into the metal ion reaction solution obtained in the step (7), so that the problem of peculiar smell of urine is fundamentally solved.

Description

Technical Field

[0001] The invention relates to the technical field of deodorizing materials, and in particular to a method for preparing a deodorizing urine absorbing material. Background Art

[0002] The pet market is huge, and four major factors are driving the industry's continued rapid development: (1) the expansion of the pet-owning population due to consumption downgrades; (2) the increase in pet owners' income and pet-owning expenses; (3) the gradual balance of regional economic development; and (4) the strengthening of emotional appeal. Driven by these four factors, the pet market is expected to maintain rapid development.

[0003] However, the daily feeding of pets at home also brings many inconveniences to pet owners. For example, the odor of pet urine causes the entire living environment to be filled with unpleasant odors, causing discomfort to residents.

[0004] As a product of animal physiological metabolism, urine contains not only nitrogenous wastes and inorganic salts such as uric acid and urea, but also some highly volatile substances. These components and their content are affected by many factors such as individual health status, reproductive status, age and food type. Animal urine contains hundreds of trace active substances, among which the volatile components of urine are considered to be as important as mammalian pheromones. These volatile components are mainly nitrogen-containing and sulfur-containing compounds (such as ammonia, hydrogen sulfide, etc.), which are also one of the sources of the unpleasant odor of animal urine. In addition, urine is a nutrient containing various bacteria. In old urine, these bacteria can decompose organic and inorganic substances in urine to produce new chemical components, thereby exacerbating the odor of urine. To effectively control the odor of animal urine, in addition to ensuring that the material can effectively absorb urine moisture, the problem of volatile gases and bacterial growth in urine must also be considered. The Chinese invention patent with publication number CN117179994A discloses a urine-isolating pad and its forming mold, which adopts the arrangement of urine-isolating breathable layer and urine storage support layer, although it solves the problem of easy reverse osmosis and side leakage, it fails to fundamentally solve the problem of antibacterial and odor removal. Therefore, developing a pad suitable for pets that can absorb pet urine and remove odor is an urgent product in the current pet market and home life market. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a deodorizing urine absorbing material, so as to achieve the purpose of effectively absorbing water and volatile molecules in urine while effectively inhibiting bacterial growth and removing urine odor.

[0006] The method for preparing the deodorizing urine absorbing material provided by the present invention is characterized by comprising the following steps: Step (1), dispersing 15-20 parts (parts are by mass, the same below) of powdered cellulose in 100 parts of water, stirring at 90° C. for 24 hours to obtain a 15-20 wt% cellulose dispersion, and cooling to room temperature; Step (2), uniformly mixing acrylamide and acrylic acid in a molar ratio of (0.5-2):1 to obtain a mixed solution of acrylamide and acrylic acid; Step (3), adding a crosslinking agent Bis to the mixed solution of acrylamide and acrylic acid obtained in step (2) to obtain a polyacrylamide-polyacrylic acid copolymer; Step (4), mixing the polyacrylamide-polyacrylic acid copolymer obtained in step (3) with the cellulose dispersion obtained in step (1) at a mass ratio of (0.45-3):1, and stirring at room temperature for 24 hours; Step (5), adding TEMED and ammonium persulfate, stirring evenly, and placing at room temperature for 24 hours to induce polymerization to obtain a polymer; Step (6), soaking the polymer obtained in step (5) in water for 48 hours, removing unreacted substances, and drying at 50-80° C. to obtain an intermediate product of the deodorizing urine absorbing material; Step (7), preparation of a metal ion reaction solution: mixing a metal ion solution and dopamine hydrochloride at a molar ratio of (0.1-10):1, and adjusting the pH to 5-9 with a 1 mol / L NaOH solution to obtain a metal ion reaction solution; Step (8), completely immersing the intermediate product of the deodorizing urine absorbing material obtained in step (6) into the metal ion reaction solution obtained in step (7), placing it on a horizontal shaker and shaking it for 24 hours, taking it out, washing it with water 2-4 times, and drying it to obtain the deodorizing urine absorbing material.

[0007] Furthermore, in step (3), the cross-linking agent Bis accounts for 0.2-3% of the total mass of the mixed solution of acrylamide and acrylic acid.

[0008] Furthermore, in step (5), TEMED is added in an amount of 0.5% of the total mass of the mixed solution of acrylamide and acrylic acid.

[0009] Furthermore, in step (5), 1% of the total mass of ammonium persulfate is added.

[0010] Furthermore, the metal ion in step (7) is Cu 2+ , Fe 3+ and Zn 2+ Any one or combination of .

[0011] Furthermore, the metal ion concentration in step (7) is 0.005-0.5M.

[0012] The preparation method of the deodorizing urine absorbing material provided by the present invention creatively adopts metal ions (Cu 2+ , Fe 3 + and Zn 2+ ) is combined with polyacrylamide-polyacrylic acid copolymer, cellulose and polydopamine to form an antibacterial material that absorbs water, ammonia and sulfur compounds. This material can effectively solve the problem of urine odor as pet bedding. Its positive effects are mainly reflected in: The method of the present invention can achieve rapid absorption of urine by mixing polyacrylamide-polyacrylic acid copolymer and cellulose, thereby preventing the urine from overflowing and soiling the floor after the pet urinates on the urine pad.

[0013] The method of the present invention creatively adds metal ions, which can effectively coordinate with sulfur-containing compounds and then effectively adsorb sulfur-containing compounds, such as hydrogen sulfide, which is also one of the sources of the unpleasant odor of animal urine.

[0014] The mixture prepared by the method of the present invention also contains carboxyl groups, which can effectively absorb compounds such as ammonia and further reduce the odor of urine.

[0015] Due to the presence of metal ions, the material also has antibacterial function, which can effectively prevent bacterial growth and solve the problem of urine odor from the root. DETAILED DESCRIPTION Example

[0016] 100g of powdered cellulose was dispersed in 567g of 90℃ water, stirred at constant temperature for 24 hours, and cooled to room temperature. 50g of acrylamide was weighed and mixed with 50g of acrylic acid, and 1.5g of crosslinking agent Bis (N, N′-methylenebisacrylamide (Bis), Shanghai Aladdin Biochemical Technology Co., Ltd., product number M104022, CP, 97%) was added, and stirred at room temperature for 24 hours. 0.5g of TEMED and 1g of ammonium persulfate were added, and after stirring evenly, the mixture was placed at room temperature for 24 hours to induce polymerization to obtain a polymer, and the polymer was soaked in water for 48 hours, unreacted substances were removed, and the mixture was dried at 75℃ to obtain an intermediate product of a deodorizing urine absorbing material.

[0017] Measure 0.1M Cu 2+ 200 mL of solution, add 0.08 mol dopamine hydrochloride, fully dissolve, use NaOH to adjust the pH to 5.6, and obtain Cu 2+ Reaction liquid.

[0018] Take 50g of the intermediate product of the above deodorizing urine absorbing material and immerse it in Cu 2+ The reaction solution was shaken on a horizontal shaker for 24 hours, taken out, washed with water three times, and dried to obtain the deodorizing urine absorbing material.

[0019] The unmodified plant fiber was used as the blank control group. The physical and chemical indicators and microbiological indicators of the blank control group and the deodorizing urine absorbing material are as follows: The above is only an embodiment of the present invention, and is not any formal or substantial limitation of the present invention. For those skilled in the art, without departing from the method of the present invention, modifications, supplements and substitutions can be made, and these modifications, supplements and substitutions should also be within the scope of protection of the present invention. Any equivalent changes made by those skilled in the art using the technical content disclosed above without departing from the spirit and scope of the present invention are all equivalent embodiments of the present invention; any equivalent changes made to the above embodiments based on the essential technology of the present invention, modifications, supplements and substitutions, still fall within the scope of the technical solution of the present invention.

Claims

1. A method for preparing a deodorizing urine absorbing material, characterized in that: The following steps are involved: Step (1), dispersing 15-20 parts ("parts" are measured by mass, the same below) of powdered cellulose in 100 parts of water, stirring at 90° C. for 24 hours to obtain a 15-20 wt% cellulose dispersion, and cooling to room temperature; Step (2), uniformly mixing acrylamide and acrylic acid in a molar ratio of (0.5-2):1 to obtain a mixed solution of acrylamide and acrylic acid; Step (3), adding a crosslinking agent Bis to the mixed solution of acrylamide and acrylic acid obtained in step (2) to obtain a polyacrylamide-polyacrylic acid copolymer; Step (4), mixing the polyacrylamide-polyacrylic acid copolymer obtained in step (3) with the cellulose dispersion obtained in step (1) at a mass ratio of (0.45-3):1, and stirring at room temperature for 24 hours; Step (5), adding TEMED and ammonium persulfate, stirring evenly, and placing at room temperature for 24 hours to induce polymerization to obtain a polymer; Step (6), soaking the polymer obtained in step (5) in water for 48 hours, removing unreacted substances, and drying at 50-80° C. to obtain an intermediate product of the deodorizing urine absorbing material; Step (7), preparation of a metal ion reaction solution: mixing a metal ion solution and dopamine hydrochloride at a molar ratio of (0.1-10):1, and adjusting the pH to 5-9 with a 1 mol / L NaOH solution to obtain a metal ion reaction solution; Step (8), completely immersing the intermediate product of the deodorizing urine absorbing material obtained in step (6) into the metal ion reaction solution obtained in step (7), placing it on a horizontal shaker and shaking it for 24 hours, taking it out, washing it with water 2-4 times, and drying it to obtain the deodorizing urine absorbing material.

2. The method for preparing the deodorizing urine absorbing material according to claim 1, further characterized in that: In step (3), the cross-linking agent Bis accounts for 0.2-3% of the total mass of the mixed solution of acrylamide and acrylic acid.

3. The method for preparing the deodorizing urine absorbing material according to claim 1, further characterized in that: In step (5), TEMED is added in an amount of 0.5% of the total mass of the mixed solution of acrylamide and acrylic acid.

4. The method for preparing the deodorizing urine absorbing material according to claim 1, further characterized in that: In step (5), 1% of the total mass of ammonium persulfate is added.

5. The method for preparing the deodorizing urine absorbing material according to claim 1, further characterized in that: The metal ion in step (7) is Cu 2+ , Fe 3+ and Zn 2+ Any one or combination of .

6. The method for preparing the deodorizing urine absorbing material according to claim 5, further characterized in that: The metal ion concentration in step (7) is 0.005~0.5M.