Preparation method of palygorskite-polyacrylamide water permeable rate self-adjusting water guide material

Abstract

The invention belongs to the technical field of water guide materials, and particularly discloses a preparation method of a palygorskite-polyacrylamide water seepage rate self-adjusting water guide material. The preparation method is used for solving the problems that a montmorillonite-polyacrylamide water guide material is poor in water blocking effect when the water content of soil is relatively high and is weak in water seepage rate response when the soil humidity fluctuates. Comprising the following steps: firstly, mixing palygorskite clay powder and distilled water to prepare a palygorskite aqueous solution, and mixing nonionic polyacrylamide particles and distilled water to prepare a polyacrylamide aqueous solution; then, the palygorskite aqueous solution and the polyacrylamide aqueous solution are stirred at the constant temperature for 30 min and then mixed, the mixed solution continues to be stirred at the constant temperature for 40 min, and palygorskite-polyacrylamide water guiding material slurry is obtained; and finally, drying the palygorskite-polyacrylamide water guide material slurry, so as to obtain the palygorskite-polyacrylamide water guide material. The water blocking effect of the water guiding material is improved when the soil humidity is high.

Description

Technical Field

[0001] The invention belongs to the technical field of water-conducting materials, and in particular relates to a method for preparing a palygorskite-polyacrylamide water-conducting material with self-regulating water seepage rate. Background Art

[0002] Cultivating plant-parasitic herb combinations such as Haloxylon ammodendron-Cistanche deserticola, Nitraria tangutorum-Cynomorium songaricum, and Tamarix chinensis-Cistanche deserticola on desert or salinized land in regions like Xinjiang, Inner Mongolia, Gansu, and Dongying can effectively restore local ecosystems while reaping the economic benefits of precious Chinese medicinal herbs. In this process, providing water for these plant-parasitic herb combinations has been a key issue hindering crop survival rates. First, the use of traditional drip or infiltration irrigation equipment requires constant replenishment of water from other sources. Desertified and water-scarce regions lack water resources, and frequent water replenishment and transportation costs are prohibitive, reducing the benefits of medicinal herb cultivation. Second, traditional drip or infiltration irrigation equipment cannot self-regulate its water infiltration rate based on soil moisture, resulting in rapid water consumption.

[0003] In order to reasonably distribute limited water resources during the crop growth cycle and reduce the increase in planting costs and waste of water resources caused by frequent water replenishment, a simple, low-cost, easy-to-install water-conducting material that can self-regulate the water seepage rate is in urgent need of development. According to the requirements, the water-conducting material needs to have the following functions and characteristics: (1) It can maintain the soil moisture at a value suitable for plant growth. When the soil moisture increases, the structure of the water-conducting material changes, thereby limiting the water flow. Conversely, when the soil moisture decreases, the water-conducting material increases the water flow by changing its own structure; (2) The above regulation of water flow does not require external intervention, that is, there is no need to operate flow control devices such as valves, and water conduction and water blocking can be carried out autonomously; (3) The water-conducting material needs to be assembled with a degradable water storage bag or a commonly used infiltration / drip irrigation dripper, and embedded in the water storage bag or ordinary dripper in a specific shape to interfere with the flow of irrigation water to the soil.

[0004] Existing montmorillonite-polyacrylamide water-conducting materials can meet the above requirements. However, there are two problems with the use of "montmorillonite-polyacrylamide" water-conducting materials: (1) Montmorillonite clay swells when it comes into contact with water, causing the swollen montmorillonite clay microclusters to cover most of the polyacrylamide skeleton. The dehydration rate of hydrated montmorillonite in an environment subjected to heat or external force is greater than that of polyacrylamide. This means that even when the soil moisture has reached the expected value, water can still reach the soil through the montmorillonite-polyacrylamide water-conducting material, resulting in soil moisture significantly higher than the expected value and remaining high for a long time. (2) The hydrated montmorillonite clay microclusters dehydrate after being heated or affected by external forces, and their dehydration rate is not high in the early stage of the dehydration process, but slowly accelerates over time. This results in the montmorillonite-polyacrylamide water-conducting material being unable to respond effectively in a short period of time when the soil moisture suddenly drops, that is, it is unable to adjust its own water conduction rate in a short period of time to allow water to flow quickly into the soil. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for preparing a self-regulating water seepage rate water-conducting material made of montmorillonite-polyacrylamide, which effectively solves the problem that the water-conducting material has a poor effect on hindering water flow when the soil moisture content is high and has a weak water seepage rate response when facing soil moisture fluctuations.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for preparing a palygorskite-polyacrylamide water-permeability self-regulating water-conducting material, comprising the following steps:

[0007] First, palygorskite clay powder and distilled water were mixed to prepare a palygorskite aqueous solution, and the concentration of the palygorskite aqueous solution was 9 mg / mL; polyacrylamide particles and distilled water were mixed to prepare a polyacrylamide aqueous solution, and the concentration of the polyacrylamide aqueous solution was 4.5 mg / mL.

[0008] Then, the palygorskite aqueous solution and the polyacrylamide aqueous solution were stirred at a constant temperature of 35° C. for 30 minutes and then mixed. The mixed solution was further stirred at a constant temperature of 35° C. for 40 minutes to obtain a palygorskite-polyacrylamide water-conducting material slurry.

[0009] Finally, the palygorskite-polyacrylamide water-conducting material slurry is dried to obtain the palygorskite-polyacrylamide water-conducting material.

[0010] Furthermore, the palygorskite clay powder has a particle size of 300 mesh and a purity greater than 90%.

[0011] Furthermore, the polyacrylamide particles are non-ionic, and the solid content of the polyacrylamide particles is greater than 90%.

[0012] Furthermore, the drying temperature of the palygorskite-polyacrylamide water-conducting material slurry is 60°C.

[0013] Compared with the prior art, the beneficial technical effects of the present invention are:

[0014] (1) By replacing montmorillonite clay with palygorskite clay, which has a smaller water swelling coefficient and a lower saturated water content, the present invention improves the water-blocking effect of the water-conducting material on water transmission, allowing the soil's water content to gradually stabilize during water absorption and saturation, without oversaturation caused by excessive water transfer. Compared with montmorillonite-polyacrylamide water-conducting materials, the total amount of water released during dehydration is only 33% to 76% of the original amount. This improves the water-blocking effect of the water-conducting material when the soil moisture is high.

[0015] (2) The present invention improves the irrigation water replenishment response when soil moisture decreases. Compared with montmorillonite-polyacrylamide water-conducting materials, the present invention increases the average amount of water delivered to the soil when soil moisture decreases by approximately 12%. By further optimizing the temporal allocation of irrigation water resources, the palygorskite-polyacrylamide water-conducting material can effectively reduce the additional costs of excessive irrigation in arid and water-scarce areas, thereby increasing crop yields. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 These are infrared spectra of palygorskite clay, polyacrylamide, and the palygorskite-polyacrylamide water-conducting material prepared in Example 3, wherein (a) is polyacrylamide, (b) is palygorskite clay, and (c) is the palygorskite-polyacrylamide water-conducting material.

[0017] Figure 2 is the microstructure of the water-conducting material after drying and contacting with water, as well as the volume expansion ratio after swelling in water, where (a), (b), and (c) are scanning electron microscope images of palygorskite clay, montmorillonite clay, and polyacrylamide when dry and containing water, respectively; (d) is the volume expansion ratio of the palygorskite-polyacrylamide water-conducting material and the montmorillonite-polyacrylamide water-conducting material after swelling in water.

[0018] Figure 3 It is the water absorption performance of palygorskite-polyacrylamide water-conducting material and montmorillonite-polyacrylamide water-conducting material.

[0019] Figure 4 It is the water loss performance of palygorskite-polyacrylamide water-conducting material and montmorillonite-polyacrylamide water-conducting material.

[0020] Figure 5 These are the differential scanning calorimetry analysis results of the palygorskite-polyacrylamide water-conducting material of Example 1 and the montmorillonite-polyacrylamide water-conducting material of Comparative Example 1.

[0021] Figure 6These are the differential scanning calorimetry analysis results of the palygorskite-polyacrylamide water-conducting material of Example 2 and the montmorillonite-polyacrylamide water-conducting material of Comparative Example 2.

[0022] Figure 7 These are the differential scanning calorimetry analysis results of the palygorskite-polyacrylamide water-conducting material of Example 6 and the montmorillonite-polyacrylamide water-conducting material of Comparative Example 6.

[0023] Figure 8 These are electron microscope images of palygorskite-polyacrylamide water-conducting materials and montmorillonite-polyacrylamide water-conducting materials with different proportions after drying and swelling with water.

[0024] Figure 9 It is the water conduction rate of the palygorskite-polyacrylamide water-conducting material and the montmorillonite-polyacrylamide water-conducting material after contacting with the soil.

[0025] Figure 10 The figure shows the change in water flow rate input into the soil by the palygorskite-polyacrylamide water-conducting material and the montmorillonite-polyacrylamide water-conducting material under different degrees of soil dryness. DETAILED DESCRIPTION

[0026] Example 1: A method for preparing a self-regulating water-conducting material with a palygorskite-polyacrylamide water seepage rate comprises the following steps: (1) mixing 0.045 g of palygorskite clay powder with 5 mL of distilled water to prepare a palygorskite aqueous solution; and mixing 0.18 g of polyacrylamide particles with 40 mL of distilled water to prepare a polyacrylamide aqueous solution.

[0027] The palygorskite clay powder is brown, with a particle size of 300 mesh and a purity greater than 90%. The polyacrylamide particles are white, non-ionic, and have a solid content greater than 90%.

[0028] (2) The palygorskite aqueous solution and the polyacrylamide aqueous solution were stirred at 35° C. for 30 minutes and then mixed. The mixed solution was further stirred at 35° C. for 40 minutes to obtain a palygorskite-polyacrylamide water-conducting material slurry.

[0029] (3) The palygorskite-polyacrylamide water-conducting material slurry was baked in a drying oven at 60° C. until completely dry to obtain a palygorskite-polyacrylamide water-conducting material (PAL-PAM), numbered MP1025.

[0030] Example 2: This example differs from Example 1 in that in step (1), 0.09 g of palygorskite clay powder and 10 mL of distilled water are mixed to prepare a palygorskite aqueous solution. The palygorskite-polyacrylamide water-conducting material prepared in this example is numbered MP105.

[0031] Example 3: This example differs from Example 1 in that in step (1), 0.18 g of palygorskite clay powder and 20 mL of distilled water are mixed to prepare a palygorskite aqueous solution. The palygorskite-polyacrylamide water-conducting material prepared in this example is numbered MP11.

[0032] Example 4: This example differs from Example 1 in that in step (1), 0.36 g of palygorskite clay powder and 40 mL of distilled water are mixed to prepare a palygorskite aqueous solution. The palygorskite-polyacrylamide water-conducting material prepared in this example is numbered MP12.

[0033] Example 5: This example differs from Example 1 in that in step (1), 0.72 g of palygorskite clay powder and 80 mL of distilled water are mixed to prepare a palygorskite aqueous solution. The palygorskite-polyacrylamide water-conducting material prepared in this example is numbered MP14.

[0034] Example 6: This example differs from Example 1 in that in step (1), 1.08 g of palygorskite clay powder and 120 mL of distilled water are mixed to prepare a palygorskite aqueous solution. The palygorskite-polyacrylamide water-conducting material prepared in this example is numbered MP16.

[0035] Comparative Example 1: The difference between this embodiment and Comparative Example 1 is that the palygorskite clay powder is replaced with montmorillonite clay, and other conditions remain unchanged to prepare a montmorillonite-polyacrylamide water-conducting material (MMT-PAM) numbered BL2025.

[0036] Comparative Example 2: The difference between this embodiment and Comparative Example 2 is that the palygorskite clay powder is replaced with montmorillonite clay, and other conditions remain unchanged to prepare a montmorillonite-polyacrylamide water-conducting material numbered BL205.

[0037] Comparative Example 3: The difference between this embodiment and Comparative Example 3 is that the palygorskite clay powder is replaced with montmorillonite clay, and other conditions remain unchanged to prepare a montmorillonite-polyacrylamide water-conducting material numbered BL21.

[0038] Comparative Example 4: The difference between this embodiment and Comparative Example 4 is that the palygorskite clay powder is replaced with montmorillonite clay, and other conditions remain unchanged to prepare a montmorillonite-polyacrylamide water-conducting material numbered BL22.

[0039] Comparative Example 5: The difference between this embodiment and Comparative Example 5 is that the palygorskite clay powder is replaced with montmorillonite clay, and other conditions remain unchanged to prepare a montmorillonite-polyacrylamide water-conducting material numbered BL24.

[0040] Comparative Example 6: The difference between this embodiment and Comparative Example 6 is that the palygorskite clay powder is replaced with montmorillonite clay, and other conditions remain unchanged to prepare a montmorillonite-polyacrylamide water-conducting material numbered BL26.

[0041] The palygorskite clay, polyacrylamide and the palygorskite-polyacrylamide water-conducting material prepared in Example 3 were tested using a Fourier transform infrared spectrometer. The test results are as follows: Figure 1 As shown in the figure, the results show that during the mixing process of palygorskite clay and polyacrylamide, it only adheres to the surface of polyacrylamide and no chemical reaction occurs to generate new substances. The two are physically combined.

[0042] Figure 2 (a), (b), and (c) show the scanning electron microscope microstructures of palygorskite clay, montmorillonite clay, and polyacrylamide in hydrated and dry states, respectively. Figure 2 (d) shows the macroscopic volume changes of the palygorskite-polyacrylamide water-conducting material prepared in Example 5 and the montmorillonite-polyacrylamide water-conducting material prepared in Comparative Example 5 in the water-saturated and dry states. Figure 2 As shown in Figure (d), the volume increase of the palygorskite-polyacrylamide water-conducting material upon water swelling is 21%, while the volume increase of the montmorillonite-polyacrylamide water-conducting material is 54%. This indicates that palygorskite has a smaller swelling coefficient than montmorillonite, allowing more of the polyacrylamide skeleton in the hydrated palygorskite-polyacrylamide water-conducting material to be exposed. It also indicates that palygorskite is more suitable as an aggregate in water-conducting materials.

[0043] The water absorption performance of the water-conducting materials of each embodiment and comparative example was tested, and the results were as follows: Figure 3 As shown, the water absorption rate of the palygorskite-polyacrylamide water-conducting material is higher than that of the montmorillonite-polyacrylamide water-conducting material when it first comes into contact with water. However, as the water absorption time increases, the palygorskite-polyacrylamide water-conducting material quickly becomes saturated and the total amount of water finally accommodated by the material is much smaller than that of the montmorillonite-polyacrylamide water-conducting material.

[0044] The water loss performance of the water-conducting materials of each embodiment and comparative example was tested, and the results were as follows: Figure 4 As shown in the figure, the water loss rate of the palygorskite-polyacrylamide water-conducting material at the initial stage of the dehydration process under the drying condition of 60°C is slightly higher than that of the montmorillonite-polyacrylamide water-conducting material. However, as the dehydration process proceeds, the water in the palygorskite-polyacrylamide water-conducting material is rapidly dehydrated, while the water in the montmorillonite-polyacrylamide water-conducting material is dehydrated more slowly.

[0045] comprehensive Figure 3 、 Figure 4It can be seen that compared with montmorillonite-polyacrylamide water-conducting material, palygorskite-polyacrylamide water-conducting material can hold less total water, only 42% of the former. However, its water absorption saturation and water loss drying rate are faster.

[0046] In order to further analyze and verify the differences in the water binding capacity of palygorskite clay, montmorillonite clay and polyacrylamide, the differential scanning calorimetry (TG-DSC) results of palygorskite-polyacrylamide water-conducting materials and montmorillonite-polyacrylamide water-conducting materials with different ratios were compared. Figure 5 、 Figure 6 and Figure 7 As shown in the figure, (1) based on the data of the sample with higher polyacrylamide content, it can be concluded that the binding force of polyacrylamide on water is higher than that of palygorskite clay. Under the conditions of heating and external force extrusion, palygorskite clay microclusters are more easily dehydrated than polyacrylamide. Therefore, in order to effectively block the transport of water into the soil with high water content, the polyacrylamide skeleton in the palygorskite-polyacrylamide water-conducting material needs to be exposed to the soil environment more. (2) The water storage capacity of the palygorskite-polyacrylamide water-conducting material is weaker than that of the montmorillonite-polyacrylamide water-conducting material. This result is verified by the difference in water loss rate of the materials. It also shows that when using montmorillonite-polyacrylamide as a water-conducting material, the water infiltrating into the soil will not be effectively reduced for a long time, which may lead to high soil moisture. (3) Since the dehydration capacity of palygorskite and polyacrylamide is different, the water infiltration rate can be regulated by controlling the ratio of the two. That is, in the face of soil environments with different humidity requirements, the internal water content (water content gradient, i.e., the internal osmotic pressure of the material) required for the switching of the "water-conducting-water-blocking" mode of the palygorskite-polyacrylamide water-conducting material can be set by regulating the ratio of palygorskite and polyacrylamide, thereby achieving self-regulation of the water infiltration rate during the irrigation process according to the preset soil moisture value.

[0047] Specifically, assuming that the current plant growth requires a high soil moisture environment, the proportion of palygorskite in the palygorskite-polyacrylamide water-conducting material will be increased so that more water can be conducted into the soil under the action of rising temperature, increased osmotic pressure or external force squeezing; and for plants that require a low soil moisture environment to grow, the proportion of polyacrylamide will be increased, so that even if the temperature rises, the osmotic pressure increases, or external force squeezing occurs, a large amount of water will not enter the soil.

[0048] The results of electron microscope observation of different ratios of palygorskite-polyacrylamide water-conducting materials and montmorillonite-polyacrylamide water-conducting materials further verified the water-blocking performance advantage of palygorskite-polyacrylamide water-conducting materials in high soil humidity environment ( Figure 8 ).like Figure 8In (c), (e), and (f), red arrows indicate that the polyacrylamide skeleton, partially covered by the palygorskite clay microclusters, can be clearly seen in the water-containing palygorskite-polyacrylamide water-conducting material. This microstructural evidence confirms that palygorskite clay has a smaller water expansion coefficient than montmorillonite clay. This suggests that palygorskite clay is a more suitable aggregate for water-conducting materials than montmorillonite clay to improve their resistance to water infiltration when soil moisture concentrations are high.

[0049] Figure 9 The paper shows the change of water supply of palygorskite-polyacrylamide water-conducting material to the soil over time when compared with montmorillonite-polyacrylamide water-conducting material. Figure 9 It can be seen that (1) in the initial stage of the water conduction process (the first 20 minutes after the water conduction material contacts the soil), the amount of water entering the soil increases with the palygorskite content. As the water conduction process progresses and the soil moisture content increases, the total amount of water entering the soil decreases with the increase of the palygorskite clay content. This phenomenon once again verifies that the threshold for triggering the water conduction / water blocking state switch of the palygorskite-polyacrylamide water conduction material can be controlled by adjusting the ratio of palygorskite clay to polyacrylamide, that is, a one-to-one correspondence between "expected soil moisture-palygorskite / polyacrylamide ratio" can be established through the material ratio. (2) Compared with montmorillonite-polyacrylamide water-conducting materials, the reaction rate of palygorskite-polyacrylamide water-conducting materials in the initial stage of the water-conducting process (the first 20 minutes after the water-conducting materials come into contact with the soil) is higher than that of montmorillonite-polyacrylamide, while the total amount of water released into the soil during the entire water-conducting process is relatively small, about 33% to 76% of that of montmorillonite-polyacrylamide water-conducting materials. The reason is that the swelling coefficient of montmorillonite clay microclusters is relatively large and the ability to restrain water is relatively weak, so it can continue to conduct water after the soil is saturated.

[0050] Figure 10 The results show the change in the amount of water supplied to the soil by the palygorskite-polyacrylamide water-conducting material compared to the montmorillonite-polyacrylamide water-conducting material after the soil moisture decreases, that is, the response intensity of the water-conducting material from the water-blocking state to the water-conducting state in the face of the decrease in soil moisture. Figure 10 It can be seen from the results that (1) the lower the soil moisture content, the higher the water flow rate of the palygorskite-polyacrylamide water-conducting material into the soil. (2) As the content of palygorskite clay increases, the water flow rate of the palygorskite-polyacrylamide water-conducting material into the low-humidity soil increases. (3) Compared with the montmorillonite-polyacrylamide water-conducting material, the palygorskite-polyacrylamide water-conducting material can increase the amount of water it can transport into the soil when the soil moisture content decreases (an average increase of 12%). Figure 9 , reflecting that its response intensity of water-conducting / water-blocking state switching when facing changes in soil concentration has been improved.

[0051] The present invention operates as follows: a palygorskite-polyacrylamide water-conducting material is embedded in the surface of a water storage bag's seepage point or filled into a drip irrigation / drip irrigation emitter. This material blocks the flow of water into the soil, changing the water flow path from "water source-soil" to "water source-conducting material-soil." The water flow rate is controlled and constrained by the palygorskite-polyacrylamide water-conducting material. The end of the palygorskite-polyacrylamide water-conducting material that directly contacts the water source is side A, and the end that directly contacts the soil is side B. Assume the water source's humidity is 100%, and the soil's humidity is less than 100% (assuming 10%). The water-conducting material begins to absorb water, gradually flowing from the water source through side A to side B, and then from side B into the soil, causing the soil humidity to gradually increase. Because this is the initial stage of the water-conducting process, the humidity on side A is much higher than on side B, resulting in a high water concentration gradient within the water-conducting material. This results in a higher osmotic pressure, leading to a greater amount of water flowing from the water source to the soil. As the water-conducting material continuously absorbs water, its interior becomes saturated. The palygorskite clay clusters and polyacrylamide swell and increase in volume, shifting their water-conducting properties to water-binding properties. That is, without external forces, heating, or osmotic pressure differentials, the absorbed water is not easily released. At this point, the water-conducting material exhibits a low water concentration gradient (low osmotic pressure), restricting the flow of water from the source through the material to the soil, and thus stabilizing soil moisture at a fixed value. After plants absorb water from the soil, or water is lost or evaporated, the soil returns to a low-humidity state. Water bound by side B of the water-conducting material begins to enter the soil, causing the water content on side B to decrease, reestablishing a high water concentration gradient and higher osmotic pressure within the material. As the palygorskite clay clusters and polyacrylamide lose water, their swollen state becomes shriveled. Water once again enters the soil from the source through the material, replenishing the soil's moisture.

[0052] By replacing montmorillonite with palygorskite clay, which has a lower water swelling coefficient and saturated water content, this new water-conducting material improves its ability to block water transfer. This allows the soil's water content to gradually stabilize during saturation, preventing oversaturation caused by excessive water transfer. Compared to montmorillonite-polyacrylamide water-conducting materials, the total amount of water released during dehydration is only 33% to 76% of the original amount. This improves the water-blocking effect of the water-conducting material when soil moisture is high.

[0053] This invention improves the irrigation water replenishment response when soil moisture decreases. Compared to montmorillonite-polyacrylamide, the average amount of water delivered to the soil during periods of decreasing soil moisture is approximately 12% higher. By further optimizing the temporal allocation of irrigation water resources, the palygorskite-polyacrylamide water-conducting material can effectively reduce the additional costs associated with over-irrigation in arid and water-scarce regions, thereby increasing crop yields.

[0054] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A method for preparing a palygorskite-polyacrylamide water-permeability self-regulating water-conducting material, characterized in that: The following steps are involved: First, palygorskite clay powder and distilled water were mixed to prepare a palygorskite aqueous solution, wherein the concentration of the palygorskite aqueous solution was 9 mg / mL; and polyacrylamide particles and distilled water were mixed to prepare a polyacrylamide aqueous solution, wherein the concentration of the polyacrylamide aqueous solution was 4.5 mg / mL; Then, the palygorskite aqueous solution and the polyacrylamide aqueous solution were stirred at a constant temperature for 30 minutes respectively and then mixed, and the mixed solution was further stirred at a constant temperature for 40 minutes to obtain a palygorskite-polyacrylamide water-conducting material slurry; Finally, the palygorskite-polyacrylamide water-conducting material slurry is dried to obtain the palygorskite-polyacrylamide water-conducting material.

2. The method for preparing the palygorskite-polyacrylamide water seepage rate self-regulating water-conducting material according to claim 1, characterized in that: The particle size of the palygorskite clay powder is 300 mesh, and the purity is greater than 90%.

3. The method for preparing the palygorskite-polyacrylamide water seepage rate self-regulating water-conducting material according to claim 2, characterized in that: The polyacrylamide particles are non-ionic and have a solid content of more than 90%.

4. The method for preparing the palygorskite-polyacrylamide water seepage rate self-regulating water-conducting material according to claim 3, characterized in that: The temperature of the palygorskite aqueous solution and the polyacrylamide aqueous solution during constant temperature stirring is 35°C.

5. The method for preparing the palygorskite-polyacrylamide water seepage rate self-regulating water-conducting material according to claim 4, characterized in that: The drying temperature of the palygorskite-polyacrylamide water-conducting material slurry is 60°C.

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