A stereoscopic solidified fiber soil for gardens and a method for preparing the same

Abstract

This invention discloses a three-dimensional solidified fiber soil for landscaping and its preparation method, belonging to the field of landscaping management technology. It comprises the following raw materials in parts by weight: 30-35 parts soil, 8-15 parts perlite, 5-15 parts peat moss, 25-35 parts slow-release fiber component, and 5-10 parts binder component. The slow-release fiber component is plant fiber with a surface-loaded urea slow-release gel. The binder component is a mixture of Ter Razyme soil solidification enzyme dilution and modified polyethylene solution. The slow-release fiber component in the three-dimensional solidified fiber soil for landscaping provided by this invention consists of hydrogel particles internally loaded with urea and fibers loaded on the outside of the hydrogel particles. Due to its network structure, the hydrogel particles can effectively store urea. The fiber structure contains a large number of ether bonds, giving the slow-release fiber component good hygroscopic and water-retention properties, which is beneficial to plant growth and improves the greening effect of the fiber soil.

Description

Technical Field

[0001] This invention belongs to the field of landscape management technology, specifically relating to a three-dimensional solidified fiber soil for landscaping and its preparation method. Background Technology

[0002] With the acceleration of urbanization, the urban heat island effect and noise pollution are becoming increasingly serious problems, negatively impacting the urban environment and residents' lives. Therefore, increasing urban green coverage has become an effective means of alleviating these issues. Vertical greening, including wall greening, rooftop greening, and elevated bridge greening, is an innovative greening method that has attracted widespread attention due to its ability to significantly increase urban green space.

[0003] Currently, traditional methods such as using plastic boxes and cloth bags to hold soil for planting greenery are commonly used, and these containers are fixed in place to achieve vertical greening. However, these traditional methods suffer from poor drainage and aeration, causing the soil to easily compact and clump together, which is detrimental to the growth of greenery. Furthermore, they restrict root growth and reduce the absorption capacity of plant roots, thus limiting the overall growth of greenery.

[0004] Solidified fiber soil is a solidified matrix composed of uniformly mixed plant fibers (peat, reed stalks, etc.), perlite, and binder components, appropriately compressed, and tightly bonded together while maintaining suitable porosity. Its application in landscaping offers the following advantages: it solidifies without loss, has high plasticity, and is water-retaining and breathable. However, existing solidified fiber soils use cement as the binder component, and cement solidification causes soil hardening, which is detrimental to fabric growth. Summary of the Invention

[0005] The purpose of this invention is to provide a three-dimensional solidified fiber soil for landscaping and its preparation method, thereby solving the problem that the bonding components in existing solidified fiber soils damage the soil structure.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A three-dimensional solidified fibrous soil for landscaping, comprising the following raw materials in parts by weight:

[0008] 30-35 parts soil, 8-15 parts perlite, 5-15 parts peat moss, 25-35 parts slow-release fiber component, and 5-10 parts binder component.

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

[0010] The adhesive component is a compound of Ter razyme soil immobilization enzyme dilution and modified polyethylene solution.

[0011] Furthermore, the mass ratio of Ter razyme soil immobilizing enzyme dilution to modified polyvinyl alcohol solution in the adhesive component is 1:1.

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

[0013] Sodium carboxymethyl cellulose was added to deionized water and stirred at 60°C until completely dissolved. Under a nitrogen atmosphere, potassium persulfate was added and stirred for 10 minutes. Then, coupling modified plant fiber, acrylamide, and N,N-methylenebisacrylamide were added and stirred for 5-10 minutes. Urea was added, the temperature was raised to 70°C, and the reaction was maintained for 1 hour. After that, the mixture was freeze-dried under vacuum and crushed to obtain the fiber slow-release component.

[0014] Furthermore, in the above reaction process, the 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] In the presence of potassium persulfate, sodium carboxymethyl cellulose undergoes a free radical reaction in which some of the hydroxyl groups on the molecular chain form oxygen free radicals. These oxygen free radicals further initiate free radical grafting polymerization of acrylamide, N,N-methylenebisacrylamide, and coupled modified plant fibers. The final polymer product is plant fiber carrying urea-releasing gel.

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

[0018] Polyethylene glycol silane acrylate was added to deionized water and stirred until homogeneous. Then, pretreated plant fibers were added and stirred for 30 minutes. The mixture was then heated to 60-80℃ and stirred for 3 hours. After filtration, the filter cake was dried in an oven at 105℃ to constant weight to obtain the coupled modified plant fibers. Polyethylene glycol silane acrylate is a long-chain polymer with good water solubility. It carries siloxane and acrylate structures and can undergo a coupling reaction with pretreated plant fibers to introduce acrylate groups, which is beneficial for the loading of subsequent slow-release components.

[0019] Furthermore, in the above reaction process, the 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 fibers are prepared through the following steps:

[0022] Straw fibers were soaked in a hydroxide solution for 6 hours, and then acetic acid was added to adjust the pH to 7-8. After filtration, the filter cake was dried in an oven at 60°C to constant weight to obtain the pretreated plant fibers. When straw fibers are treated with sodium hydroxide solution, the surface of the straw fibers becomes rougher due to the decomposition of lignin and hemicellulose, which increases their surface area and is beneficial to subsequent coupling reactions.

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

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

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

[0026] Polyvinyl alcohol was added to deionized water and stirred at 90°C for 30 min to dissolve. Then the temperature was lowered to 60°C, epoxy succinic acid was added, and sodium hydroxide solution was added dropwise to adjust the pH to 7-8. The mixture was stirred at 200 r / min for 2 h to obtain the modified polyvinyl alcohol solution. Under alkaline conditions, the epoxy groups in epoxy succinic acid react with the hydroxyl groups of polyvinyl alcohol to form new hydroxyl groups and introduce carboxyl groups on the polyvinyl alcohol molecular chain, thereby improving the hydrophilicity while ensuring the adhesive properties of polyvinyl alcohol.

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

[0028] Furthermore, the polyvinyl alcohol is PVA1799.

[0029] Furthermore, the Terrazyme soil immobilizing enzyme diluent is composed of Terrazyme soil immobilizing enzyme and deionized water at a mass ratio of 1:500.

[0030] Furthermore, the Terrazyme soil solidification enzyme is the American TerraZyme bio-enzyme soil solidification agent distributed by Tairan Lutong Technology (Shenzhen) Co., Ltd., which is a transparent brownish-red liquid compound enzyme product with a density of 1.0-1.08 g / cm³. 3 .

[0031] Furthermore, the perlite and peat moss have a particle size of 2-4 mm.

[0032] The preparation method of the above-mentioned three-dimensional garden solidified fiber soil includes the following steps:

[0033] Weigh the raw materials according to the specified weight, mix and stir the weighed raw materials to obtain a mixture, add the mixture into the mold, and press and mold at a temperature of 80-100℃.

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

[0035] The beneficial effects of this invention are:

[0036] This invention provides a three-dimensional solidified fibrous soil for landscaping, comprising soil, perlite, peat moss, a slow-release fiber component, and a binder component. The slow-release fiber component consists of hydrogel particles internally loaded with urea and fibers loaded on the outside of the hydrogel particles. The hydrogel particles, due to their network structure, effectively store urea, preventing rapid release. The outer fibers further inhibit urea release. The fiber structure contains numerous ether bonds (acrylate polyethylene glycol silane), which enhances the hydrophilicity of the slow-release fiber component. The hydrogel has a high specific surface area and porosity, thus giving the slow-release fiber component excellent hygroscopic and water-retention properties, which is beneficial for plant growth and improves the greening effect of the fibrous soil.

[0037] The binding component in this invention is a compound of Terrazyme soil solidification enzyme dilution and modified polyethylene solution. Terrazyme soil solidification enzyme has a catalytic effect, which can weaken the soil's water absorption capacity and create a water barrier effect. Under pressure, it achieves a solidification effect. However, when used alone, it will significantly reduce the water absorption rate of the fibrous soil. The modified polyethylene solution has a certain binding effect and hydrophilicity, but when used alone, the binding effect is poor, and the resulting fibrous soil has poor erosion resistance and is prone to deformation. Therefore, this invention uses a compound of the two as the binding component, so that the final fibrous soil has good water absorption and erosion resistance.

[0038] The present invention controls the content of the binder component in the fiber soil mainly because when the content of the binder component is too low, the fiber soil will have poor stability, and when the content is too high, the porosity between the particles inside the fiber soil will be reduced, which will affect the rooting and respiration of plants and is not conducive to plant growth. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort 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] Add 0.5g sodium carboxymethyl cellulose to 150mL of deionized water and stir at 60℃ until completely dissolved. Under a nitrogen atmosphere, add 0.01g potassium persulfate and stir for 10min. Then add 10g of coupled modified plant fiber, 0.5g acrylamide and 0.03g N,N-methylenebisacrylamide and stir for 5min. Then add 4g urea, heat to 70℃ and keep the reaction at this temperature for 1h. After that, freeze dry under vacuum and break down to obtain the fiber slow-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] 1g of acrylate polyethylene glycol silane was added to 100mL of deionized water and stirred evenly. Then, 10g of pretreated plant fiber was added and stirred for 30min. The mixture was then heated to 60℃ and stirred for 3h. After that, it was filtered and the filter cake was placed in an oven at 105℃ 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 through the following steps:

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

[0049] The straw fiber length is 0.5-7mm, specifically rice straw fiber.

[0050] Preparation Example 2

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

[0052] Add 0.5g sodium carboxymethyl cellulose to 300mL of deionized water and stir at 60℃ until completely dissolved. Under a nitrogen atmosphere, add 0.01g potassium persulfate and stir for 10min. Then add 10g of coupled modified plant fiber, 0.5g acrylamide and 0.06g N,N-methylenebisacrylamide and stir for 10min. Then add 7g urea, heat to 70℃ and keep the reaction at this temperature for 1h. After that, freeze dry under vacuum and crush to obtain the fiber slow-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] Add 5g of acrylate polyethylene glycol silane to 100mL of deionized water, stir evenly, then add 10g of pretreated plant fiber, stir for 30min, heat to 80℃ and stir for 3h, then filter, and place the filter cake in an oven at 105℃ to dry 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 through the following steps:

[0058] Straw fibers were soaked in a 6 wt% hydroxide solution for 6 hours, then acetic acid was added to adjust the pH to 8, followed by filtration. The filter cake was dried in a 60°C oven to constant weight to obtain the pretreated plant fibers.

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

[0060] Compare with Example 1

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

[0062] S1. Add 0.5g sodium carboxymethyl cellulose to 150mL of deionized water and stir at 60℃ until completely dissolved. Under a nitrogen atmosphere, add 0.01g potassium persulfate and stir for 10min. Then add 0.5g acrylamide and 0.03g N,N-methylenebisacrylamide and stir for 5min. Then add 4g urea, heat to 70℃, and keep the reaction at this temperature for 1h. After that, freeze dry under vacuum and crush to obtain the sustained-release component.

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

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

[0065] Compare with Example 2

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

[0067] Example 1

[0068] A three-dimensional solidified fibrous soil for landscaping, comprising the following raw materials in parts by weight:

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

[0070] The adhesive component consists of Terrazyme soil immobilization enzyme dilution and modified polyethylene solution in a mass ratio of 1:1.

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

[0072] Add 10g of PVA1799 to 100mL of deionized water, stir and dissolve at 90℃ for 30min, then cool to 60℃, add 0.5g of epoxy succinic acid, add 5wt% sodium hydroxide solution to adjust the pH to 7, stir at 200r / min for 2h to obtain the modified polyvinyl alcohol solution.

[0073] Terrazyme soil immobilizing enzyme dilution is composed of Terrazyme soil immobilizing enzyme and deionized water at a mass ratio of 1:500.

[0074] Terrazyme soil stabilizer enzyme, distributed by TerraZyme Bio-enzyme Soil Stabilizer (USA) Co., Ltd., is a transparent, brownish-red liquid compound enzyme product with a density of 1.0-1.08 g / cm³. 3 .

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

[0076] The preparation method of the above-mentioned three-dimensional garden solidified fiber soil includes the following steps:

[0077] Weigh the raw materials according to the specified weight, mix and stir the weighed raw materials to obtain a mixture, add the mixture into a mold, and press it at 80℃ to form the final product.

[0078] The pressure for pressure molding is 6 MPa; the pressure molding time is 3 minutes.

[0079] Example 2

[0080] A three-dimensional solidified fibrous soil for landscaping, comprising the following raw materials in parts by weight:

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

[0082] The mass ratio of Terrazyme soil immobilization enzyme dilution to modified polyvinyl alcohol solution in the adhesive component is 1:1.

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

[0084] Add 10g of PVA1799 to 100mL of deionized water, stir and dissolve at 90℃ for 30min, then cool to 60℃, add 1.5g of epoxy succinic acid, add 5wt% sodium hydroxide solution to adjust the pH to 7-8, stir at 200r / min for 2h to obtain the modified polyvinyl alcohol solution.

[0085] Terrazyme soil immobilizing enzyme dilution is composed of Terrazyme soil immobilizing enzyme and deionized water at a mass ratio of 1:500.

[0086] Terrazyme soil stabilizer enzyme, distributed by TerraZyme Bio-enzyme Soil Stabilizer (USA) Co., Ltd., is a transparent, brownish-red liquid compound enzyme product with a density of 1.0-1.08 g / cm³. 3 .

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

[0088] The preparation method of the above-mentioned three-dimensional garden solidified fiber soil includes the following steps:

[0089] Weigh the raw materials according to the specified weight, mix and stir the weighed raw materials to obtain a mixture, add the mixture into a mold, and press it at 100℃ to form the final product.

[0090] The pressure for pressure molding is 2 MPa; the pressure molding time is 3 minutes.

[0091] Example 3

[0092] A three-dimensional solidified fibrous soil for landscaping, comprising the following raw materials in parts by weight:

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

[0094] The adhesive component consists of a Ter razyme soil immobilization enzyme dilution and a modified polyethylene solution in a mass ratio of 1:1.

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

[0096] Add 10g of PVA1799 to 100mL of deionized water, stir and dissolve at 90℃ for 30min, then cool to 60℃, add 2.5g of epoxy succinic acid, add 5wt% sodium hydroxide solution to adjust the pH to 8, stir at 200r / min for 2h to obtain the modified polyvinyl alcohol solution.

[0097] Ter razyme soil immobilization enzyme dilution is composed of Ter razyme soil immobilization enzyme and deionized water at a mass ratio of 1:500.

[0098] Ter razyme soil stabilizer enzyme is a US-made Ter raZyme bio-enzyme soil stabilizer distributed by Tairan Lutong Technology (Shenzhen) Co., Ltd. It is a transparent, brownish-red liquid compound enzyme product with a density of 1.0-1.08 g / cm³. 3 .

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

[0100] The preparation method of the above-mentioned three-dimensional garden solidified fiber soil includes the following steps:

[0101] Weigh the raw materials according to the specified weight, mix and stir the weighed raw materials to obtain a mixture, add the mixture into a mold, and press it at 100℃ to form the final product.

[0102] The pressure for pressure molding is 2 MPa; the pressure molding time is 5 minutes.

[0103] Example 4

[0104] A three-dimensional solidified fibrous soil for landscaping differs from Example 1 in its raw material composition. This solidified fibrous soil, by weight, comprises the following raw materials:

[0105] 35 parts soil, 15 parts perlite, 15 parts peat moss, 35 parts slow-release fiber component, and 5 parts adhesive component were prepared in the same manner as in Example 1.

[0106] Example 5

[0107] A three-dimensional solidified fibrous soil for landscaping differs from Example 1 in its raw material composition, comprising the following raw materials by weight:

[0108] 30 parts soil, 8 parts perlite, 5 parts peat moss, 25 parts slow-release fiber component, and 10 parts adhesive component were prepared in the same manner as in Example 1.

[0109] Example 6

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

[0111] Example 7

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

[0113] Example 8

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

[0115] Comparative Example 1

[0116] A three-dimensional solidified fiber soil for landscaping, which differs from Example 1 in that the slow-release fiber component in Example 1 is replaced with the product prepared in Control Example 1.

[0117] Comparative Example 2

[0118] A three-dimensional solidified fiber soil for landscaping, which differs from Example 1 in that the slow-release fiber component in Example 1 is replaced with the substance in Comparative Example 2.

[0119] Comparative Example 3

[0120] A three-dimensional solidified fiber soil for landscaping, compared with Example 1, differs in that the modified polyvinyl alcohol solution is replaced with an equal mass of polyethylene solution. The preparation steps of the polyethylene solution are as follows:

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

[0122] Add 10g of PVA1799 to 100mL of deionized water and stir at 90℃ for 30 minutes to dissolve.

[0123] Comparative Example 4

[0124] A three-dimensional solidified fiber soil for landscaping differs from Example 4 in that the amount of the adhesive component is adjusted from 5 parts by weight to 4 parts by weight.

[0125] Comparative Example 5

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

[0127] Comparative Example 6

[0128] A three-dimensional solidified fiber soil for landscaping differs from Example 1 in that the adhesive component is different. In this comparative example, the adhesive component is a mixture of Terrazyme soil solidification enzyme and deionized water at a mass ratio of 1:500.

[0129] Comparative Example 7

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

[0131] The solidified fiber soils obtained in Examples 1-8 and Comparative Examples 1-7 were subjected to performance tests, and the test items are as follows:

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

[0133] Erosion resistance: Each group of solidified fiber soil substrates was laid on the artificial slope with a thickness of 5cm. The artificial slope consisted of planting boxes of 40×40×15cm with a slope of 60°. The rainfall lasted for 30 minutes, and the simulated rainfall intensity was 20mm / d. After the simulated rainfall ended, the substrate lost from the bottom was collected, dried in an oven to constant weight, and weighed. The substrate mass loss rate (%) 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 with a ruler and the average value was taken.

[0135] The results are shown in Table 1:

[0136] Table 1

[0137]

[0138] As can be seen from the data recorded in Table 1, the solidified fiber soil obtained in Examples 1-8 has a large water absorption rate and high erosion resistance, which is conducive to plant germination and growth, and is more beneficial to landscaping.

[0139] Specifically, the test results of Comparative Examples 1, 2, and 3 and Example 1 show that the slow-release fiber component in this invention has good hygroscopic and water-retention properties. The test results of Example 1 and Comparative Examples 6 and 7 show that the bonding component is a compound of Terrazyme soil solidification enzyme dilution and modified polyethylene solution, combining the advantages of both to compensate for their shortcomings, resulting in fibrous soil with good water absorption and erosion resistance. The test results of Example 4, Example 5, Comparative Examples 4 and 5 show that this invention controls the content of the bonding component in the fibrous soil, mainly because if the content of the bonding component is too low, the stability of the fibrous soil will be poor, and if the content is too high, the porosity between the particles inside the fibrous soil will be reduced, affecting the rooting and respiration of plants, which is not conducive to plant growth.

[0140] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

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

Claims

1. A three-dimensional solidified fiber soil for landscaping, characterized in that, By weight, it includes the following parts by weight of raw materials: 30-35 parts soil, 8-15 parts perlite, 5-15 parts peat moss, 25-35 parts slow-release fiber component, and 5-10 parts binder component; The sustained-release fiber component is plant fiber with urea sustained-release gel loaded on its surface; The adhesive component is a mixture of Terrazyme soil solidification enzyme dilution and modified polyvinyl alcohol solution; The fiber-based slow-release component is prepared through the following steps: Sodium carboxymethyl cellulose was added to deionized water and stirred at 60°C until completely dissolved. Under a nitrogen atmosphere, potassium persulfate was added and stirred for 10 minutes. Then, coupling modified plant fiber, acrylamide, and N,N-methylenebisacrylamide were added and stirred for 5-10 minutes. Urea was added, the temperature was raised to 70°C, and the reaction was maintained for 1 hour. After that, the mixture was freeze-dried under vacuum and crushed to obtain the fiber slow-release component. 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 min, heat to 60-80℃ and stir for 3 h, then filter, place the filter cake in an oven at 105℃ and dry to constant weight to obtain the coupling modified plant fiber. The modified polyvinyl alcohol solution is prepared by the following steps: Polyvinyl alcohol was added to deionized water and stirred at 90°C for 30 min to dissolve. Then the temperature was lowered to 60°C, epoxy succinic acid was added, and sodium hydroxide solution was added dropwise to adjust the pH to 7-8. The mixture was stirred at 200 r / min for 2 h to obtain the modified polyvinyl alcohol solution.

2. The three-dimensional solidified fiber soil for landscaping according to claim 1, characterized in that, The adhesive component contains Terrazyme soil solidification enzyme dilution and modified polyvinyl alcohol solution in a mass ratio of 1:

1. The Terrazyme soil solidification enzyme dilution is composed of Terrazyme soil solidification enzyme and deionized water in a mass ratio of 1:

500.

3. The three-dimensional solidified fiber soil for landscaping according to claim 1, characterized in that, The 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.

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

5. The three-dimensional solidified fiber soil for landscaping according to claim 1, characterized in that, The modified polyvinyl alcohol solution is prepared by the following steps: Polyvinyl alcohol was added to deionized water and stirred at 90°C for 30 min to dissolve. Then the temperature was lowered to 60°C, epoxy succinic acid was added, and sodium hydroxide solution was added dropwise to adjust the pH to 7-8. The mixture was stirred at 200 r / min for 2 h to obtain the modified polyvinyl alcohol solution.

6. The three-dimensional solidified fiber soil for landscaping according to claim 1, characterized in that, The ratio of polyvinyl alcohol, deionized water and epoxy succinic acid is 10g:100mL:0.5-2.5g.

7. A method for preparing three-dimensional solidified fibrous soil for landscaping as described in any one of claims 1-6, characterized in that, Includes the following steps: Weigh the raw materials according to the specified weight, mix and stir the weighed raw materials to obtain a mixture, add the mixture into the mold, and press and mold at a temperature of 80-100℃.

8. The method for preparing three-dimensional solidified fibrous soil for landscaping according to claim 7, characterized in that, The pressure for the pressure molding process is 2-6 MPa; the pressure molding time is 3-5 minutes.

Images