CN115088587B - Plant-growing slope protection geotechnical felt for mine restoration and preparation method thereof - Google Patents
Plant-growing slope protection geotechnical felt for mine restoration and preparation method thereof Download PDFInfo
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- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/40—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure
- A01G24/44—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure in block, mat or sheet form
- A01G24/46—Growth substrates; Culture media; Apparatus or methods therefor characterised by their structure in block, mat or sheet form multi-layered
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- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
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- A01G24/12—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material containing soil minerals
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- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N53/00—Biocides, pest repellants or attractants, or plant growth regulators containing cyclopropane carboxylic acids or derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P17/00—Pest repellants
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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- E02D17/20—Securing of slopes or inclines
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Abstract
The invention discloses a plant-growing slope protection geotechnical felt for mine restoration and a preparation method thereof. The geotechnical felt made of the phase-change composite fiber and the thermosensitive fiber has excellent heat storage and accumulation capacity and heat regulation performance, is very suitable for mine soil with lower air temperature throughout the year, and is convenient for later repair. The geotechnical felt provided by the invention can supply various nutritional ingredients to mine soil at a proper temperature, realizes rapid greening ecological restoration of mines, does not need frequent watering and water supplementing in the later maintenance process, saves time and labor, and has high popularization value.
Description
Technical Field
The invention relates to the field of ecological slope protection, in particular to a vegetation slope protection geotechnical felt for mine restoration and a preparation method thereof.
Background
Mineral resources in China are rich, but mining throughout the year damages large-scale lands and vegetation, so that the problems of water and soil loss, sha Yang dust and the like are caused, and serious ecological natural disasters such as landslide, debris flow and the like are easily caused. Therefore, ecological restoration of abandoned mine pits is an environmental protection problem to be solved urgently at present.
In the prior art, the mine soil restoration technology mainly adopts a mode of combining a soil matrix construction technology and a vegetation planting technology. The soil matrix construction technology is to cover soil on the surface of the mine, so that the soil matrix easy for plant growth is formed on the surface of the mine soil. The soil remediation technology mainly has the following problems: due to the limitation of the water and fertilizer retention performance of the soil matrix on the surface of mine soil, under the environment condition of drought or large rainfall, the water and nutrients of the soil are easy to run off, and the growth of vegetation is inhibited, even dead.
Document CN 211057821U discloses a scour-resistant erosion-resistant ecological vegetation net mat whose structure includes a folded net composed of a wavy bidirectional fine grid net or a bulk geotechnical net mat and a grass seed layer; the upper and lower parts of the folding net are respectively provided with an upper grid layer and a lower grid layer which are formed by stretching polypropylene, and the plant-growing nutrient soil filled in the folding net is prepared, but the absorption effect on nutrient substances is poor for mine soil with cold air temperature, and the repairing effect is general.
Document CN 108797612A discloses a high-stability slope three-dimensional greening ecological restoration method, which comprises the steps of spraying an ecological curing agent for 1-3 times, paving a reinforcing net, paving a layer of permeable and breathable environment-friendly ecological concrete, and the like, wherein the greening restoration steps are complicated.
Based on the above, a plant-growing slope protection geotechnical felt which can promote nutrient absorption and has simple and convenient repairing steps and a preparation method thereof are required to be developed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a preparation method of a plant-grown slope protection geotechnical felt for mine restoration and a product thereof, and solves the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a preparation method of a vegetation slope protection geotechnical felt for mine restoration comprises the following preparation steps:
(one) preparing phase-change composite fiber
Taking PCM particles with average particle diameter of 10-20 μm for standby; after 70-80 parts by weight of jute fiber is dissolved to prepare a solution, 20-30 parts by weight of PCM particles are added into the solution to be uniformly stirred, and the phase-change composite fiber is prepared by wet spinning for standby;
(II) preparation of thermosensitive fiber
PVA is dissolved in deionized water at 80 ℃ for 4 hours to prepare a stock solution with the concentration of 18%; adding 8-10 parts by weight of a thermochromic material into 100 parts by weight of a stock solution, uniformly stirring and mixing to form a mixed solution, filtering, vacuum deaerating for 24 hours, adopting wet spinning, and spinning the thermosensitive fiber by taking a sodium sulfate saturated aqueous solution as a coagulating bath; wherein the thermosensitive color-changing material is a compound of crystal violet lactone and RTP (red thermosensitive color-changing pigment);
(III) needled felt
Phase change composite fiber and thermosensitive fiber are mixed according to 60 percent: mixing 40% by weight of the components together and conveying the components into a net, wherein in the net forming process, the air inlet pressure is 0.45-0.75 MPa, the yarn swinging frequency of a yarn swinging device is 500-1000 times/min, and the speed of a net supporting curtain is 3-5 m/min; finally, 8-10 layers of phase change composite fibers and thermosensitive fibers are manufactured into geotextile by a needling method;
(IV) shaping standing groove
Placing the geotechnical felt into a die with a plurality of cushion blocks, controlling the temperature to be 70-80 ℃, applying pressure, and forming a plurality of placing grooves on the lower surface of the geotechnical felt; coating water-based glue in the placing groove;
(V) preparation of a nutritional layer
(1) Preparing nutritional ingredients: respectively taking 50-60 parts by weight of clay mineral, 8-10 parts by weight of nitrogen, phosphorus and potassium nutritional agent, 8-10 parts by weight of natural fiber, 5-8 parts by weight of water retaining agent, 3-5 parts by weight of microbial agent, 2-3 parts by weight of vitamin and 10-15 parts by weight of water, uniformly stirring to prepare a solution, and sealing by adopting a sealing film;
(2) Preparing traditional Chinese medicine components: drying and pulverizing residues of radix astragali, herba Lysimachiae Christinae, aloe, glycyrrhrizae radix, semen Cuscutae, flos Buddlejae, radix Gentianae, radix Sophorae Flavescentis, herba Houttuyniae and rhizoma Smilacis Glabrae, soaking in 10 times of water for 2 hr, heating to 100deg.C for 30min, filtering, retaining liquid, and sealing with sealing film;
(3) Configuration of insect repellent components: the permethrin and the tetramethrin are prepared into mixed solution according to the weight ratio of 1:1, and the mass concentration is 2%; sealing by a sealing film;
(4) Sequentially placing the components sealed by the three sealing films in a placing groove at intervals;
(VI) compounding
And (3) coating water-based glue on one side of commercially available silica gel cloth, paving the silica gel cloth on one side of the geotechnical felt where the placing groove is arranged, and compounding the silica gel cloth into a whole.
The preparation method of the compound of crystal violet lactone and RTP (red thermal-sensitive color-changing pigment) comprises the following steps: weighing the following components in percentage by mass: 10:100, citric acid and tetradecanol, stirring and mixing uniformly, adding 2-3 parts by weight of RTP (red thermal discoloration pigment), regulating the temperature to 50 ℃, and carrying out ultrasonic treatment for 30min to fully dissolve the crystal violet lactone, the citric acid, the tetradecanol and the RTP (red thermal discoloration pigment) to obtain the thermal discoloration compound.
Wherein, clay minerals in the step (five) are montmorillonite, bentonite or a combination thereof; the nitrogen, phosphorus and potassium nutritional agent comprises urea, calcium dihydrogen phosphate and plant ash; the natural fiber is one or more of jute fiber, coconut fiber and grass fiber; the water-retaining agent is polyacrylamide, and the microbial agent is one or more of bacillus subtilis, brevibacterium epidermidis, nitrifying bacteria and sulfidizing bacteria.
The clay mineral has certain water absorbability and tackiness, and has certain tackiness after absorbing water, so that nutrition loss is avoided, and the nitrogen, phosphorus and potassium nutrient can supplement nutrient elements such as nitrogen, phosphorus and potassium for the repair soil, so that nutrition in the repair soil is sufficiently convenient for plant growth and development. Microbial agents provide the necessary microbial environment for plant growth.
Preferably, the traditional Chinese medicine waste residue components can improve soil fertility, improve physical and chemical properties of soil, reduce occupied space of wastes by waste utilization, change wastes into valuables and improve soil quality.
Preferably, the insect repellent component is a mixed solution of permethrin and tetramethrin in a weight ratio of 1:1, and the mass concentration is 2%. The mixed solution has the characteristics of high efficiency, broad spectrum, no harm to the environment and the like, has good insect-repellent effect and stable chemical property.
In addition, the invention also protects the geotechnical felt prepared by the method for preparing the vegetation slope protection geotechnical felt for mine restoration, and the whole thickness of the geotechnical felt is 2-2.5mm.
Compared with the prior art, the invention has the following technical effects:
1. the geotechnical felt which is prepared by combining the phase change composite fiber and the thermosensitive fiber and is prepared by applying the phase change energy storage material (PCM) to the fiber integrates energy storage and thermosensitive discoloration, can store energy, can also act heat on the thermosensitive fiber with a color-changing function, displays different colors at different temperatures, and is convenient for absorbing sunlight in different wave bands; the geotechnical felt made of the phase-change composite fiber and the thermosensitive fiber has excellent heat storage and accumulation capacity and heat regulation performance, is very suitable for mine soil with lower air temperature throughout the year, and is beneficial to later repair.
2. The thermochromic compound prepared from crystal violet lactone and RTP (red thermochromic pigment) is an organic reversible thermochromic material, widens the thermochromic range of single components, has wider solar energy absorption wave band and more obvious thermochromic effect under a certain proportion, and has excellent thermal regulation performance.
3. Because mine soil is extremely barren, the organic matter content is low, the sticky particle content is low, the texture is poor, the fertilizer retaining capability is poor and the like, the nutritional ingredients, the traditional Chinese medicine ingredients and the insect repellent ingredients are respectively sealed by adopting flexible films, the three ingredients can be prevented from reacting with the lapse of time, the supply of various nutritional ingredients is influenced, and the efficacy of the various nutritional ingredients is maximized. Meanwhile, the nutrient substances are sealed by adopting the flexible membrane and released after being mechanically pressurized in the using process, and the nutrient substances can permeate into soil, have comprehensive components, can well meet the growth requirements of plants, are suitable for the growth of the plants, and realize rapid mine greening ecological restoration.
4. The jute fiber and the PVA are both environment-friendly materials, so that the problem of difficult treatment after discarding is avoided; the jute fiber can form wooden tumor after being degraded in the soil, is easy to mix with the soil, can enhance the fertility and organic matters of the soil, and is beneficial to the growth of vegetation; second, the excellent moisture absorption capacity of jute fibers plays an important role in controlling soil erosion.
5. During construction, after broken stone and the like on the surface layer of mine soil are removed, the geotechnical felt can be spread, the silica gel cloth can be fixed with the surface of the soil in an anti-skid way, proper mechanical pressurization is performed, and nutritional ingredients, traditional Chinese medicine ingredients and insect repellent ingredients in the flexible film overflow along with the broken stone and the like and permeate into the soil, so that multiple functions of heat preservation, cold prevention, hydrothermal balance, water retention, nutrition supply and the like are realized on the mine soil. The geotechnical felt is simple and convenient to construct, does not need frequent watering to supplement water in the later maintenance process, saves time and labor, and has higher popularization value.
Drawings
FIG. 1 is a flow chart of a preparation method of a plant-growing slope protection geotechnical felt for mine restoration;
FIG. 2 is a graph showing the effect of different mass fractions of CVL and RTP in the dope on ultimate strength of the fiber;
fig. 3 is a graph showing the effect of different mass fractions of CVL and RTP in the dope on the fiber break strain.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
The technical scheme of the invention is further described below with reference to the accompanying drawings.
The flow chart of the preparation method of the vegetation slope protection geotechnical felt for mine restoration is shown in figure 1, and the preparation method comprises the following specific steps:
(one) preparing phase-change composite fiber
Taking PCM particles with average particle diameter of 10-20 μm for standby; after 70-80 parts by weight of jute fiber is dissolved to prepare a solution, 20-30 parts by weight of PCM particles are added into the solution to be uniformly stirred, and the phase-change composite fiber is prepared by wet spinning for standby;
(II) preparation of thermosensitive fiber
PVA is dissolved in deionized water at 80 ℃ for 4 hours to prepare a stock solution with the concentration of 18%; adding 8-10 parts by weight of a thermochromic material into 100 parts by weight of a stock solution, uniformly stirring and mixing to form a mixed solution, filtering, vacuum deaerating for 24 hours, adopting wet spinning, and spinning the thermosensitive fiber by taking a sodium sulfate saturated aqueous solution as a coagulating bath; wherein the thermosensitive color-changing material is a compound of crystal violet lactone and RTP (red thermosensitive color-changing pigment);
(III) needled felt
Phase change composite fiber and thermosensitive fiber are mixed according to 60 percent: mixing 40% by weight of the components together and conveying the components into a net, wherein in the net forming process, the air inlet pressure is 0.45-0.75 MPa, the yarn swinging frequency of a yarn swinging device is 500-1000 times/min, and the speed of a net supporting curtain is 3-5 m/min; finally, 8-10 layers of phase change composite fibers and thermosensitive fibers are manufactured into geotextile by a needling method;
(IV) shaping standing groove
Placing the geotechnical felt into a die with a plurality of cushion blocks, controlling the temperature to be 70-80 ℃, applying pressure, and forming a plurality of placing grooves on the lower surface of the geotechnical felt; coating water-based glue in the placing groove;
(V) preparation of a nutritional layer
(1) Preparing nutritional ingredients: respectively taking 50-60 parts by weight of clay mineral, 8-10 parts by weight of nitrogen, phosphorus and potassium nutritional agent, 8-10 parts by weight of natural fiber, 5-8 parts by weight of water retaining agent, 3-5 parts by weight of microbial agent, 2-3 parts by weight of vitamin and 10-15 parts by weight of water, uniformly stirring to prepare a solution, and sealing by adopting a sealing film;
(2) Preparing traditional Chinese medicine components: drying and pulverizing residues of radix astragali, herba Lysimachiae Christinae, aloe, glycyrrhrizae radix, semen Cuscutae, flos Buddlejae, radix Gentianae, radix Sophorae Flavescentis, herba Houttuyniae and rhizoma Smilacis Glabrae, soaking in 10 times of water for 2 hr, heating to 100deg.C for 30min, filtering, retaining liquid, and sealing with sealing film;
(3) Configuration of insect repellent components: the permethrin and the tetramethrin are prepared into mixed solution according to the weight ratio of 1:1, and the mass concentration is 2%; sealing by a sealing film;
(4) Sequentially placing the components sealed by the three sealing films in a placing groove at intervals;
(VI) compounding
And (3) coating water-based glue on one side of commercially available silica gel cloth, paving the silica gel cloth on one side of the geotechnical felt where the placing groove is arranged, and compounding the silica gel cloth into a whole.
Wherein the nutrient components are a mixture of clay minerals, nitrogen, phosphorus and potassium nutrient, natural fibers, a water retaining agent, a microbial agent, vitamins and water. The Chinese medicinal components comprise the mixture of medicinal residues of astragalus, lysimachia, aloe, liquorice, semen cuscutae, buddleja officinalis, gentian, radix sophorae flavescentis, cordate houttuynia, glabrous greenbrier rhizome and the like. The insect repellent component is a mixed solution of permethrin and tetramethrin in a weight ratio of 1:1, and the mass concentration is 2%.
The preparation method of the compound of crystal violet lactone and RTP (red thermal-sensitive color-changing pigment) comprises the following steps: weighing the following components in percentage by mass: 10:100, citric acid and tetradecanol, stirring and mixing uniformly, adding 2-3 parts by weight of RTP (red thermal discoloration pigment), regulating the temperature to 50 ℃, and carrying out ultrasonic treatment for 30min to fully dissolve the crystal violet lactone, the citric acid, the tetradecanol and the RTP (red thermal discoloration pigment) to obtain the thermal discoloration compound.
Table 1 shows the different mass ratios of CVL (crystal violet lactone) and RTP (red thermochromic pigment) in the spinning solution and their ultimate fiber strength and strain at break
By comparison, the ultimate strength of the pure PVA fiber is 48.6MPa, the breaking strain is 35.0%, and when the doping amount of RTP and CVL is 4%, the ultimate strength of the thermosensitive fiber is reduced to 40.2MPa, and the breaking strain is 32.2%; as the amount of RTP and CVL incorporated continues to increase, the ultimate strength and strain at break of the thermosensitive fibers are reduced to different extents, since the incorporation of CVL and RTP reduces the intermolecular binding force of PVA. The spinnability of the fibers is still good.
Table 2 shows the different mass ratios of CVL (crystal violet lactone) and RTP (red thermal color-change pigment) in the spinning solution, and the color-change effect and color-change condition at a certain temperature
Through comparing a plurality of groups of samples, the CVL (crystal violet lactone) and RTP (red thermal discoloration pigment) are found to be different in color in the spinning solution according to different proportions, the thermal fibers are different in color, the CVL and the RTP are not the colors of a single component, the compound of the CVL and the RTP can be in a plurality of color ranges, more sunlight in different wave bands can be absorbed, the discoloration effect is more obvious, and the thermal regulation performance is excellent. Of course, the color development effect is not separated from the choice of the color developer and the solvent and the weight ratio.
By combining different mass ratios of CVL (crystal violet lactone) and RTP (red thermal color-variable pigment) in spinning solution, the ultimate strength of fibers, fracture strain, and color-changing effect and color-changing condition of fibers at a certain temperature, the proper addition of 2-3 parts by mass and 6-8 parts by mass of RTP (red thermal color-variable pigment) and CVL (crystal violet lactone) respectively can be known that the mechanical property and the color-changing performance of the whole 3# and 4# are better.
During construction, after broken stone and the like on the surface layer of mine soil are removed, the geotechnical felt can be spread, the silica gel cloth can be fixed with the surface of the soil in an anti-skid way, proper mechanical pressurization is performed, and nutritional ingredients, traditional Chinese medicine ingredients and insect repellent ingredients in the flexible film overflow along with the broken stone and the like and permeate into the soil, so that multiple functions of heat preservation, cold prevention, hydrothermal balance, water retention, nutrition supply and the like are realized on the mine soil. The geotechnical felt is simple and convenient to construct, does not need frequent watering to supplement water in the later maintenance process, saves time and labor, and has higher popularization value.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. A preparation method of a vegetation slope protection geotechnical felt for mine restoration comprises the following preparation steps:
(one) preparing phase-change composite fiber
Taking PCM particles with average particle diameter of 10-20 μm for standby; after 70-80 parts by weight of jute fiber is dissolved to prepare a solution, 20-30 parts by weight of PCM particles are added into the solution to be uniformly stirred, and the phase-change composite fiber is prepared by wet spinning for standby;
(II) preparation of thermosensitive fiber
PVA is dissolved in deionized water at 80 ℃ for 4 hours to prepare a stock solution with the concentration of 18%; adding 8-10 parts by weight of a thermochromic material into 100 parts by weight of a stock solution, uniformly stirring and mixing to form a mixed solution, filtering, vacuum deaerating for 24 hours, adopting wet spinning, and spinning the thermosensitive fiber by taking a sodium sulfate saturated aqueous solution as a coagulating bath; wherein the thermosensitive color-changing material is a compound of crystal violet lactone and red thermosensitive color-changing pigment;
(III) needled felt
Phase change composite fiber and thermosensitive fiber are mixed according to 60 percent: mixing 40% by weight of the components together and conveying the components into a net, wherein in the net forming process, the air inlet pressure is 0.45-0.75 MPa, the yarn swinging frequency of a yarn swinging device is 500-1000 times/min, and the speed of a net supporting curtain is 3-5 m/min; finally, 8-10 layers of phase change composite fibers and thermosensitive fibers are manufactured into geotextile by a needling method;
(IV) shaping standing groove
Placing the geotechnical felt into a die with a plurality of cushion blocks, controlling the temperature to be 70-80 ℃, applying pressure, and forming a plurality of placing grooves on the lower surface of the geotechnical felt; coating water-based glue in the placing groove;
(V) preparation of a nutritional layer
(1) Preparing nutritional ingredients: respectively taking 50-60 parts by weight of clay mineral, 8-10 parts by weight of nitrogen, phosphorus and potassium nutritional agent, 8-10 parts by weight of natural fiber, 5-8 parts by weight of water retaining agent, 3-5 parts by weight of microbial agent, 2-3 parts by weight of vitamin and 10-15 parts by weight of water, uniformly stirring, and sealing by adopting a sealing film;
(2) Preparing traditional Chinese medicine components: drying and pulverizing residues of radix astragali, herba Lysimachiae Christinae, aloe, glycyrrhrizae radix, semen Cuscutae, flos Buddlejae, radix Gentianae, radix Sophorae Flavescentis, herba Houttuyniae and rhizoma Smilacis Glabrae, soaking in 10 times of water for 2 hr, heating to 100deg.C for 30min, filtering, retaining liquid, and sealing with sealing film;
(3) Configuration of insect repellent components: the permethrin and the tetramethrin are prepared into mixed solution according to the weight ratio of 1:1, and the mass concentration is 2%; sealing by a sealing film;
(4) Sequentially placing the components sealed by the three sealing films in a placing groove at intervals;
(VI) compounding
And (3) coating water-based glue on one side of commercially available silica gel cloth, paving the silica gel cloth on one side of the geotechnical felt where the placing groove is arranged, and compounding the silica gel cloth into a whole.
2. The method of manufacturing according to claim 1, characterized in that: the preparation method of the compound of the crystal violet lactone and the red thermal-sensitive color-changing pigment in the step (II) comprises the following steps: weighing the following components in percentage by mass: and (2) uniformly mixing the crystal violet lactone, the citric acid and the tetradecanol in a ratio of 10:100, adding 2-3 parts by weight of the red thermochromic pigment, adjusting the temperature to 50 ℃, and carrying out ultrasonic treatment for 30min to fully dissolve the crystal violet lactone, the citric acid and the tetradecanol to obtain the thermochromic compound.
3. The method of manufacturing according to claim 1, characterized in that: in the step (five), clay minerals are montmorillonite, bentonite or a combination thereof.
4. A method of preparation according to claim 3, characterized in that: the nitrogen, phosphorus and potassium nutritional agent comprises urea, calcium dihydrogen phosphate and plant ash.
5. The method of manufacturing according to claim 4, wherein: the natural fiber is one or more of jute fiber, coconut fiber and grass fiber.
6. The method of manufacturing according to claim 5, wherein: the water-retaining agent is polyacrylamide.
7. The method of manufacturing according to claim 6, wherein: the microbial agent is one or more of bacillus subtilis, brevibacterium epidermidis, nitrifying bacteria and sulfurylating bacteria.
8. A geotechnical mat produced by the method for producing a vegetation slope protection geotechnical mat for mine restoration according to any one of claims 1 to 7.
9. The geotechnical mat according to claim 8, wherein: the overall thickness of the geotechnical felt is 2-2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210802457.9A CN115088587B (en) | 2022-07-07 | 2022-07-07 | Plant-growing slope protection geotechnical felt for mine restoration and preparation method thereof |
Applications Claiming Priority (1)
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