Solidified fiber soil for three-dimensional garden and preparation method of solidified fiber soil

Abstract

The invention discloses three-dimensional solidified fiber soil for gardens and a preparation method thereof, and belongs to the technical field of garden treatment, the three-dimensional solidified fiber soil is prepared from the following raw materials in parts by weight: 30-35 parts of soil, 8-15 parts of perlite, 5-15 parts of peat soil, 25-35 parts of a slow-release fiber component and 5-10 parts of a bonding component; the slow-release fiber component is plant fiber of which the surface is loaded with urea slow-release gel; the bonding component is formed by compounding a Ter razyme soil immobilizing enzyme diluent and a modified polyethylene solution, and the sustained-release fiber component in the three-dimensional garden immobilized fiber soil provided by the invention is composed of hydrogel particles internally loaded with urea and fibers loaded outside the hydrogel particles; the hydrogel particles have a good storage effect on urea due to a network structure, and a fiber structure contains a large number of ether bonds, so that the slow-release fiber component has good moisture absorption performance and water retention performance, the growth of plants is facilitated, and the greening effect of the fiber soil is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of garden management, and in particular relates to a three-dimensional garden-use solidified fiber soil and a preparation method thereof. Background Art

[0002] With the acceleration of urbanization, urban heat island effect and noise pollution are becoming increasingly serious, which have adverse effects on urban environment and residents' lives. Therefore, increasing the urban green coverage rate has become an effective means to alleviate these problems. Three-dimensional greening, including wall greening, roof greening and viaduct greening, as an innovative greening method, has attracted widespread attention because it can greatly increase the urban greening area.

[0003] At present, traditional methods such as plastic boxes and cloth bags are often used to hold soil for planting green plants, and three-dimensional greening is achieved by fixing these containers. However, these traditional methods have problems with poor drainage and air permeability, and the soil is easily hardened into lumps, which is not conducive to the growth of green plants. In addition, they will also restrict the growth of plant roots and reduce the absorption capacity of plant roots, thereby restricting the growth of green plants.

[0004] Solidified fiber soil is a solidified matrix made of plant fiber (peat, reed stalks, etc.), perlite, adhesive components and other base materials, which are evenly mixed, appropriately compressed, and tightly combined with each other while maintaining appropriate porosity. It has the following advantages when used in landscaping: solidification does not cause loss, strong plasticity, water retention and air permeability, but the existing solidified fiber soil uses cement as the adhesive component, and cement solidification will cause soil hardening, which is not conducive to the growth of fabrics. Summary of the invention

[0005] The purpose of the present invention is to provide a three-dimensional gardening solidified fiber soil and a preparation method thereof, so as to solve the problem that the existing solidified fiber soil uses adhesive components to destroy the soil structure.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A three-dimensional gardening solidified fiber soil comprises the following raw materials in parts by weight:

[0008] 30-35 parts of soil, 8-15 parts of perlite, 5-15 parts of peat soil, 25-35 parts of slow-release fiber components, and 5-10 parts of bonding components.

[0009] The slow-release fiber component is plant fiber with urea slow-release gel loaded on the surface.

[0010] The bonding component is prepared by compounding Terrazyme soil solidifying enzyme dilution and modified polyethylene solution.

[0011] Furthermore, the mass ratio of the Ter razyme soil-solidifying enzyme dilution and the modified polyvinyl alcohol solution in the bonding component is 1:1.

[0012] Furthermore, the fiber slow-release component is prepared by the following steps:

[0013] Sodium carboxymethyl cellulose is added to deionized water and stirred at 60°C until completely dissolved. Potassium persulfate is added under a nitrogen atmosphere. After stirring for 10 minutes, coupled modified plant fiber, acrylamide and N,N-methylenebisacrylamide are added. After stirring for 5-10 minutes, urea is added, the temperature is raised to 70°C, and the reaction is kept warm for 1 hour. Then, vacuum freeze-drying and crushing are carried out to obtain the fiber sustained-release component.

[0014] Furthermore, in the above reaction process, the dosage ratio of sodium carboxymethyl cellulose, deionized water, potassium persulfate, coupled modified plant fiber, acrylamide, N,N-methylenebisacrylamide and urea is 0.5g:150-300mL:0.01g:10g:0.5g:0.03-0.06g:4-7g.

[0015] Furthermore, the viscosity of the sodium carboxymethyl cellulose is 800-1200 cps.

[0016] Under the action of potassium persulfate, some hydroxyl groups on the molecular chain of sodium carboxymethyl cellulose form oxygen free radicals, which further initiate free radical grafting polymerization of acrylamide and N,N-methylenebisacrylamide as well as coupled modified plant fibers. The final polymerization product is plant fiber carrying urea slow-release gel.

[0017] Furthermore, the coupled modified plant fiber is prepared by the following steps:

[0018] Add acrylate polyethylene glycol silane to deionized water, stir evenly and then add to pretreated plant fiber, stir for 30 minutes, heat to 60-80°C and stir to react for 3 hours, then filter, and place the filter cake in an oven at 105°C to dry to constant weight to obtain the coupled modified plant fiber. Acrylate polyethylene glycol silane is a long-chain polymer with good water solubility. It carries siloxane and acrylate structures and can undergo coupling reaction with pretreated plant fiber to introduce acrylate groups, which is beneficial to the loading of subsequent sustained-release components.

[0019] Furthermore, in the above reaction process, the usage ratio of acrylate polyethylene glycol silane, deionized water, and pretreated plant fiber is 1-5g:100mL:10g.

[0020] Furthermore, the acrylate polyethylene glycol silane has a molecular weight of 1-5k and is sourced from Xi'an Kaixin Biotechnology Co., Ltd.

[0021] Furthermore, the pretreated plant fiber is prepared by the following steps:

[0022] The straw fiber is soaked in a hydroxide solution for 6 hours, and then acetic acid is added to adjust the pH to 7-8, and then filtered. The filter cake is dried in an oven at 60°C to constant weight to obtain the pretreated plant fiber. When the straw fiber is treated with a sodium hydroxide solution, the fiber surface of the straw becomes rougher due to the decomposition of lignin and hemicellulose, thereby increasing its surface area, which is beneficial to the subsequent coupling reaction.

[0023] Furthermore, the straw fiber has a length of 0.5-7 mm, and is specifically rice straw fiber and / or wheat straw fiber.

[0024] Furthermore, the mass fraction of the sodium hydroxide solution is 6%.

[0025] Furthermore, the modified polyvinyl alcohol solution is prepared by the following steps:

[0026] Add polyvinyl alcohol into deionized water, stir and dissolve at 90° C. for 30 minutes, then cool to 60° C., add epoxy succinic acid, add sodium hydroxide solution dropwise to adjust the pH value to 7-8, and stir and react at 200 r / min for 2 hours to obtain the modified polyvinyl alcohol solution. Under alkaline conditions, the epoxy group in the epoxy succinic acid reacts with the hydroxyl group of the polyvinyl alcohol to form a new hydroxyl group on the polyvinyl alcohol molecular chain and introduce a carboxyl group, thereby ensuring the adhesive performance of the polyvinyl alcohol while improving the hydrophilicity.

[0027] Furthermore, in the above reaction process, the usage ratio of polyvinyl alcohol, deionized water and epoxysuccinic acid is 10g:100mL:0.5-2.5g.

[0028] Furthermore, the polyvinyl alcohol is PVA1799.

[0029] Furthermore, the Terrazyme soil-solidifying enzyme dilution solution is composed of Terrazyme soil-solidifying enzyme and deionized water in a mass ratio of 1:500.

[0030] Furthermore, the Terrazyme soil solidifying enzyme is the American TerraZyme bioenzyme soil solidifying agent represented by Tairan Lutong Technology (Shenzhen) Co., Ltd., which is a transparent brown liquid complex enzyme product with a density of 1.0-1.08g / cm 3 .

[0031] Furthermore, the particle size of the perlite and peat soil is 2-4 mm.

[0032] The method for preparing the three-dimensional gardening solidified fiber soil comprises the following steps:

[0033] Weigh the raw materials by weight, mix and stir the weighed raw materials to obtain a mixture, add the obtained mixture into a mold, and perform pressure molding at a temperature of 80-100°C.

[0034] Furthermore, the pressure of the press molding is 2-6 MPa; and the time of the press molding is 3-5 min.

[0035] Beneficial effects of the present invention:

[0036] The invention provides a three-dimensional solidified fiber soil for gardening, comprising soil, perlite, peat soil, a slow-release fiber component and a bonding component, wherein the slow-release fiber component is composed of hydrogel particles loaded with urea inside and fibers loaded outside the hydrogel particles. The hydrogel particles can have a good storage effect on urea due to the network structure, thereby preventing the rapid release of urea, and the fibers outside further prevent the release of urea. The fiber structure contains a large number of ether bonds (acrylate polyethylene glycol silane), which can improve the hydrophilicity of the slow-release fiber component. The hydrogel has a high specific surface area and porosity. Therefore, the slow-release fiber component has good moisture absorption and water retention properties, is beneficial to the growth of plants, and improves the greening effect of the fiber soil.

[0037] The bonding component in the present invention is compounded by Terrazyme soil solidifying enzyme dilution and modified polyethylene solution. Terrazyme soil solidifying enzyme has catalytic effect, can weaken the water absorption capacity of soil, produce shielding effect on water, and play a solidifying effect under pressure. However, if used alone, it will significantly reduce the water absorption rate of fiber soil. The modified polyethylene solution has certain bonding effect and hydrophilicity, but if used alone, the bonding effect is poor, and the obtained fiber soil has poor anti-scouring ability and easy changeability. Therefore, the present invention compounds the two as bonding components, so that the finally obtained fiber soil has good water absorption performance and anti-scouring performance.

[0038] The present invention controls the content of bonding components in the fiber soil mainly because when the content of the bonding components is too low, the stability of the fiber soil will be poor, and when the content is too high, the gaps between particles inside the fiber soil will be reduced, affecting the rooting and breathing of plants, which is not conducive to plant growth. DETAILED DESCRIPTION

[0039] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0040] Preparation Example 1

[0041] The preparation steps of the fiber sustained-release component are as follows:

[0042] 0.5 g of sodium carboxymethyl cellulose was added to 150 mL of deionized water and stirred at 60° C. until completely dissolved. Under a nitrogen atmosphere, 0.01 g of potassium persulfate was added. After stirring for 10 min, 10 g of coupled modified plant fiber, 0.5 g of acrylamide and 0.03 g of N,N-methylenebisacrylamide were added. After stirring for 5 min, 4 g of urea was added. The temperature was raised to 70° C. and the reaction was kept warm for 1 h. The fiber was then freeze-dried and crushed to obtain the fiber sustained-release component.

[0043] The viscosity of the sodium carboxymethyl cellulose is 800-1200 cps.

[0044] The coupled modified plant fiber is prepared by the following steps:

[0045] 1 g of acrylate polyethylene glycol silane was added to 100 mL of deionized water, and after stirring evenly, 10 g of pretreated plant fiber was added, and after stirring for 30 min, the temperature was raised to 60° C. and stirred for reaction for 3 h, and then filtered. The filter cake was placed in an oven at 105° C. and dried to constant weight to obtain the coupled modified plant fiber.

[0046] The acrylate polyethylene glycol silane has a molecular weight of 1k and is sourced from Xi'an Kaixin Biotechnology Co., Ltd.

[0047] The pretreated plant fiber is prepared by the following steps:

[0048] The straw fiber is placed in a 6wt% hydroxide solution and soaked for 6 hours, and then acetic acid is added to adjust the pH to 7, and then filtered. The filter cake is dried in an oven at 60°C to a constant weight to obtain the pretreated plant fiber.

[0049] The straw fiber has a length of 0.5-7 mm, specifically rice straw fiber.

[0050] Preparation Example 2

[0051] The preparation steps of the fiber sustained-release component are as follows:

[0052] 0.5 g of sodium carboxymethyl cellulose was added to 300 mL of deionized water and stirred at 60° C. until completely dissolved. Under a nitrogen atmosphere, 0.01 g of potassium persulfate was added. After stirring for 10 min, 10 g of coupled modified plant fiber, 0.5 g of acrylamide and 0.06 g of N,N-methylenebisacrylamide were added. After stirring for 10 min, 7 g of urea was added. The temperature was raised to 70° C. and the reaction was kept warm for 1 h. Then, the mixture was freeze-dried in vacuum and crushed to obtain the fiber sustained-release component.

[0053] The viscosity of the sodium carboxymethyl cellulose is 800-1200 cps.

[0054] The coupled modified plant fiber is prepared by the following steps:

[0055] 5 g of acrylate polyethylene glycol silane was added to 100 mL of deionized water, and after stirring evenly, 10 g of pretreated plant fiber was added and stirred for 30 min. The temperature was raised to 80° C. and stirred for reaction for 3 h. The filter cake was then placed in an oven at 105° C. and dried to constant weight to obtain the coupled modified plant fiber.

[0056] The acrylate polyethylene glycol silane has a molecular weight of 5k and is sourced from Xi'an Kaixin Biotechnology Co., Ltd.

[0057] The pretreated plant fiber is prepared by the following steps:

[0058] The straw fiber is soaked in a 6 wt % hydroxide solution for 6 hours, and then acetic acid is added to adjust the pH to 8, and then filtered. The filter cake is dried in an oven at 60° C. to a constant weight to obtain the pretreated plant fiber.

[0059] The straw fiber has a length of 0.5-7 mm, and is specifically wheat straw fiber.

[0060] Comparative Example 1

[0061] The preparation steps of the fiber sustained-release component are as follows:

[0062] S1. Add 0.5 g sodium carboxymethyl cellulose to 150 mL deionized water, stir at 60 ° C until completely dissolved, add 0.01 g potassium persulfate under nitrogen atmosphere, stir for 10 min, then add 0.5 g acrylamide and 0.03 g N, N-methylenebisacrylamide, stir for 5 min, then add 4 g urea, heat to 70 ° C, keep warm for 1 h, then vacuum freeze-dry and crush to obtain the sustained-release component;

[0063] S2. Stir and mix the slow-release component and 10 g of coupled modified plant fiber to obtain a fiber slow-release component.

[0064] The viscosity of the sodium carboxymethyl cellulose is 800-1200 cps.

[0065] Comparative Example 2

[0066] This control example is a coupled modified plant fiber, and the preparation process of the coupled modified plant fiber is the same as that of Preparation Example 1.

[0067] Example 1

[0068] A three-dimensional gardening solidified fiber soil comprises the following raw materials in parts by weight:

[0069] 30 parts of soil, 8 parts of perlite, 5 parts of peat soil, 25 parts of the slow-release fiber component of Preparation Example 1, and 5 parts of bonding component.

[0070] The bonding component is composed of Terrazyme soil-solidifying enzyme dilution and modified polyethylene solution in a mass ratio of 1:1.

[0071] The modified polyvinyl alcohol solution is prepared by the following steps:

[0072] 10 g of PVA1799 was added into 100 mL of deionized water, and dissolved by stirring at 90° C. for 30 min. The temperature was then lowered to 60° C., 0.5 g of epoxysuccinic acid was added, 5 wt % sodium hydroxide solution was added dropwise to adjust the pH value to 7, and the mixture was stirred at 200 r / min for 2 h to obtain the modified polyvinyl alcohol solution.

[0073] Terrazyme soil-solidifying enzyme dilution solution is composed of Terrazyme soil-solidifying enzyme and deionized water in a mass ratio of 1:500.

[0074] Terrazyme soil solidifying enzyme is the American TerraZyme bio-enzyme soil solidifying agent represented by Tairan Lutong Technology (Shenzhen) Co., Ltd. It is a transparent brown liquid compound enzyme product with a density of 1.0-1.08g / cm 3 .

[0075] The particle size of perlite and peat soil is 2-4mm.

[0076] The method for preparing the three-dimensional gardening solidified fiber soil comprises the following steps:

[0077] Weigh the raw materials by weight, mix and stir the weighed raw materials to obtain a mixture, add the obtained mixture into a mold, and perform pressure molding at a temperature of 80°C.

[0078] The pressure of the press molding is 6MPa; the time of the press molding is 3min.

[0079] Example 2

[0080] A three-dimensional gardening solidified fiber soil comprises the following raw materials in parts by weight:

[0081] 32 parts of soil, 10 parts of perlite, 10 parts of peat soil, 30 parts of the slow-release fiber component of Preparation Example 2, and 8 parts of bonding component.

[0082] The mass ratio of Terrazyme soil-solidifying enzyme dilution and modified polyvinyl alcohol solution in the bonding component is 1:1.

[0083] The modified polyvinyl alcohol solution is prepared by the following steps:

[0084] 10 g of PVA1799 was added into 100 mL of deionized water, and dissolved by stirring at 90° C. for 30 min. The temperature was then lowered to 60° C., 1.5 g of epoxysuccinic acid was added, 5 wt % sodium hydroxide solution was added dropwise to adjust the pH value to 7-8, and the mixture was stirred at 200 r / min for 2 h to obtain the modified polyvinyl alcohol solution.

[0085] Terrazyme soil-solidifying enzyme dilution solution is composed of Terrazyme soil-solidifying enzyme and deionized water in a mass ratio of 1:500.

[0086] Terrazyme soil solidifying enzyme is the American TerraZyme bio-enzyme soil solidifying agent represented by Tairan Lutong Technology (Shenzhen) Co., Ltd. It is a transparent brown liquid compound enzyme product with a density of 1.0-1.08g / cm 3 .

[0087] The particle size of perlite and peat soil is 2-4mm.

[0088] The method for preparing the three-dimensional gardening solidified fiber soil comprises the following steps:

[0089] The raw materials are weighed by weight, mixed and stirred to obtain a mixture, and the mixture is added into a mold and pressure-formed at a temperature of 100° C.

[0090] The pressure of the press molding was 2 MPa, and the time of the press molding was 3 min.

[0091] Example 3

[0092] A three-dimensional gardening solidified fiber soil comprises the following raw materials in parts by weight:

[0093] 35 parts of soil, 15 parts of perlite, 15 parts of peat soil, 35 parts of the slow-release fiber component of Preparation Example 2, and 10 parts of bonding component.

[0094] The bonding component is composed of Terrazyme soil-solidifying enzyme dilution and modified polyethylene solution in a mass ratio of 1:1.

[0095] The modified polyvinyl alcohol solution is prepared by the following steps:

[0096] 10 g of PVA1799 was added into 100 mL of deionized water, and dissolved by stirring at 90° C. for 30 min. The temperature was then lowered to 60° C., 2.5 g of epoxysuccinic acid was added, 5 wt % sodium hydroxide solution was added dropwise to adjust the pH value to 8, and the mixture was stirred at 200 r / min for 2 h to obtain the modified polyvinyl alcohol solution.

[0097] Ter razyme soil-solidifying enzyme dilution solution is composed of Ter razyme soil-solidifying enzyme and deionized water in a mass ratio of 1:500.

[0098] Terrazyme soil solidifying enzyme is a US Terrazyme bio-enzyme soil solidifying agent represented by Tairan Lutong Technology (Shenzhen) Co., Ltd. It is a transparent brown liquid compound enzyme product with a density of 1.0-1.08g / cm 3 .

[0099] The particle size of perlite and peat soil is 2-4mm.

[0100] The method for preparing the three-dimensional gardening solidified fiber soil comprises the following steps:

[0101] The raw materials are weighed by weight, mixed and stirred to obtain a mixture, and the mixture is added into a mold and pressure-formed at a temperature of 100° C.

[0102] The pressure of the press molding was 2 MPa, and the time of the press molding was 5 min.

[0103] Example 4

[0104] A three-dimensional garden solidified fiber soil, compared with Example 1, is different in raw material composition. The solidified fiber soil comprises the following raw materials in parts by weight:

[0105] 35 parts of soil, 15 parts of perlite, 15 parts of peat soil, 35 parts of slow-release fiber components, and 5 parts of bonding components. The preparation process of the slow-release fiber components and the bonding components is the same as that of Example 1.

[0106] Example 5

[0107] A three-dimensional gardening solidified fiber soil, compared with Example 1, is different in raw material composition, and includes the following raw materials in parts by weight:

[0108] 30 parts of soil, 8 parts of perlite, 5 parts of peat soil, 25 parts of slow-release fiber components, and 10 parts of bonding components. The preparation process of the slow-release fiber components and the bonding components is the same as that of Example 1.

[0109] Example 6

[0110] A three-dimensional gardening solidified fiber soil, compared with Example 1, differs in that the amount of the slow-release fiber component is different, and the slow-release fiber component is adjusted from 25 parts by weight to 30 parts by weight.

[0111] Example 7

[0112] A three-dimensional gardening solidified fiber soil, compared with Example 2, differs in that the amount of the slow-release fiber component is different, and the slow-release fiber component is adjusted from 30 parts by weight to 35 parts by weight.

[0113] Example 8

[0114] A three-dimensional gardening solidified fiber soil, compared with Example 1, differs in that the amount of the adhesive component is different, and the adhesive component is adjusted from 5 parts by weight to 10 parts by weight.

[0115] Comparative Example 1

[0116] A three-dimensional solidified fiber soil for gardening, compared with Example 1, the difference is that the slow-release fiber component in Example 1 is replaced by the product prepared in Control Example 1.

[0117] Comparative Example 2

[0118] A three-dimensional solidified fiber soil for gardening, compared with Example 1, the difference is that the slow-release fiber component in Example 1 is replaced by the substance in Control Example 2.

[0119] Comparative Example 3

[0120] A three-dimensional garden solidified fiber soil, compared with Example 1, the difference is that the modified polyvinyl alcohol solution is replaced by a polyethylene solution of equal mass, and the steps of preparing the polyethylene solution are as follows:

[0121] The modified polyvinyl alcohol solution is prepared by the following steps:

[0122] Add 10 g of PVA1799 into 100 mL of deionized water and stir to dissolve at 90°C for 30 min.

[0123] Comparative Example 4

[0124] A three-dimensional gardening solidified fiber soil, compared with Example 4, differs in that the amount of the bonding component is adjusted from 5 parts by weight to 4 parts by weight.

[0125] Comparative Example 5

[0126] A three-dimensional gardening solidified fiber soil, compared with Example 5, differs in that the amount of the bonding component is adjusted from 10 parts by weight to 11 parts by weight.

[0127] Comparative Example 6

[0128] A three-dimensional gardening solidified fiber soil, compared with Example 1, differs in that a bonding component is different. The bonding component in this comparative example is a mixture of Terrazyme soil solidifying enzyme and deionized water in a mass ratio of 1:500.

[0129] Comparative Example 7

[0130] A three-dimensional gardening solidified fiber soil is different from Example 1 in that the bonding component is different. The bonding component in this comparative example is a modified polyvinyl alcohol solution, and the preparation process of the modified polyvinyl alcohol solution is the same as that of Example 1.

[0131] The performance tests of the cured fiber soil obtained in Examples 1 to 8 and Comparative Examples 1 to 7 were conducted, and the test items were as follows:

[0132] Water absorption rate: Water absorption rate (%) = (Wwet-Wdry) / Wdry*100%. Take a 4cm*4cm*4cm square fiber culture soil and soak it for 10 minutes to fully absorb water, spread it dry, weigh it, and then bake it at 105℃ in a constant temperature box for about 2 hours, move it into a desiccator and cool it to room temperature, weigh it, and calculate the water absorption rate;

[0133] Anti-scouring: Each group of solidified fiber soil substrates were laid on the artificial slope with a thickness of 5 cm. The artificial slope was a planting box of 40×40×15 cm, and the slope was 60°; the rainfall lasted for 30 minutes, and the simulated rainfall intensity was 20 mm / d. After the simulated rainfall ended, the substrate lost from the bottom was collected, placed in an oven to dry to constant weight, and weighed, and the mass loss rate of the substrate (%) was recorded;

[0134] Plant germination rate and growth height: Plant germination rate was determined by counting; plant growth height (15 days after sowing) was measured by a ruler and the average value was taken;

[0135] The results are shown in Table 1:

[0136] Table 1

[0137]

[0138] It can be seen from the data recorded in Table 1 that the solidified fiber soil obtained in Examples 1-8 has a large water absorption rate and a high anti-scouring performance, which is beneficial to the germination and growth of plants and more beneficial to landscaping.

[0139] Specifically, it can be seen from the test results of Comparative Example 1, Comparative Example 2, Comparative Example 3 and Example 1 that the slow-release fiber component in the present invention has good moisture absorption and water retention properties; it can be seen from the test results of Example 1, Comparative Example 6 and Comparative Example 7 that the bonding component is compounded by Terrazyme soil solidification enzyme dilution and modified polyethylene solution, combining the advantages of both to make the best of both worlds, so that the final fiber soil has good water absorption and anti-scouring properties. It can be seen from the test results of Example 4, Example 5, Comparative Example 4 and Comparative Example 5 that the present invention controls the content of the bonding component in the fiber soil, mainly because when the content of the bonding component is too low, the stability of the fiber soil will be poor, and when the content is too high, the gaps between the particles inside the fiber soil will be reduced, affecting the rooting and breathing of plants, which is not conducive to plant growth.

[0140] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0141] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional gardening solidified fiber soil, characterized in that: By weight, it includes the following raw materials: 30-35 parts of soil, 8-15 parts of perlite, 5-15 parts of peat soil, 25-35 parts of slow-release fiber components, and 5-10 parts of bonding components; The slow-release fiber component is a plant fiber with urea slow-release gel loaded on the surface; The bonding component is prepared by compounding Terrazyme soil solidifying enzyme dilution and modified polyethylene solution.

2. The three-dimensional gardening solidified fiber soil according to claim 1, characterized in that: The mass ratio of the Ter razyme soil-solidifying enzyme dilution to the modified polyvinyl alcohol solution in the bonding component is 1:1, and the Ter razyme soil-solidifying enzyme dilution is composed of the Ter razyme soil-solidifying enzyme and deionized water in a mass ratio of 1:

500.

3. The three-dimensional gardening solidified fiber soil according to claim 1, characterized in that: The fiber slow-release component is prepared by the following steps: Sodium carboxymethyl cellulose is added to deionized water and stirred at 60°C until completely dissolved. Potassium persulfate is added under a nitrogen atmosphere. After stirring for 10 minutes, coupled modified plant fiber, acrylamide and N,N-methylenebisacrylamide are added. After stirring for 5-10 minutes, urea is added, the temperature is raised to 70°C, and the reaction is kept warm for 1 hour. Then, vacuum freeze-drying and crushing are carried out to obtain the fiber sustained-release component.

4. The three-dimensional gardening solidified fiber soil according to claim 3, characterized in that: The dosage ratio of sodium carboxymethyl cellulose, deionized water, potassium persulfate, coupled modified plant fiber, acrylamide, N,N-methylenebisacrylamide and urea is 0.5g:150-300mL:0.01g:10g:0.5g:0.03-0.06g:4-7g.

5. The three-dimensional gardening solidified fiber soil according to claim 3, characterized in that: The coupled modified plant fiber is prepared by the following steps: Add acrylate polyethylene glycol silane to deionized water, stir evenly, then add pretreated plant fiber, stir for 30 minutes, heat to 60-80° C., stir and react for 3 hours, then filter, place the filter cake in an oven at 105° C. and dry to constant weight to obtain the coupled modified plant fiber.

6. The three-dimensional gardening solidified fiber soil according to claim 5, characterized in that: The usage ratio of acrylate polyethylene glycol silane, deionized water and pretreated plant fiber is 1-5g:100mL:10g.

7. The three-dimensional gardening solidified fiber soil according to claim 1, characterized in that: The modified polyvinyl alcohol solution is prepared by the following steps: Add polyvinyl alcohol into deionized water, stir and dissolve at 90° C. for 30 minutes, then cool to 60° C., add epoxysuccinic acid, dropwise add sodium hydroxide solution to adjust the pH value to 7-8, stir and react at 200 r / min for 2 hours to obtain the modified polyvinyl alcohol solution.

8. The three-dimensional gardening solidified fiber soil according to claim 1, characterized in that: The usage ratio of polyvinyl alcohol, deionized water and epoxysuccinic acid is 10g:100mL:0.5-2.5g.

9. A method for preparing the three-dimensional gardening solidified fiber soil as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Weigh the raw materials by weight, mix and stir the weighed raw materials to obtain a mixture, add the obtained mixture into a mold, and perform pressure molding at a temperature of 80-100°C.

10. The method for preparing solidified fiber soil for three-dimensional gardening according to claim 9, characterized in that: The pressure of the press molding is 2-6 MPa; the time of the press molding is 3-5 min.

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