A method for coating modification to prepare scale and bacteria resistant geotextile synthetic material

Abstract

The application discloses a method for preparing a scale-inhibiting and antibacterial geotextile synthetic material by coating modification, and comprises the following steps: providing raw materials, wherein the raw materials comprise 7 parts of hexagonal boron nitride, 0.4 parts of graphene oxide, 0.1 parts of a dispersing agent, 10 parts of a glue adhesive emulsion, 1 part of an antibacterial agent, 1 part of a cationic polymer, 0.5 parts of a viscosity regulator and 80 parts of water; mixing the raw materials by stirring and dispersing to obtain a scale-inhibiting polymer modified coating for geotextile synthetic materials; and loading the scale-inhibiting polymer modified coating to the surface of geotextile synthetic material fibers in a mode of spraying coating or coating flow casting penetration.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite materials, in particular to a method for preparing a scale-inhibiting and antibacterial geotextile composite material by coating modification. BACKGROUND

[0002] Geotextile, also known as geotextile, is a water-permeable geotextile composite material made of synthetic fibers by needling or weaving. Geotextile is divided into polyester fiber, polypropylene fiber, nylon fiber, polyethylene fiber and other needle-punched non-woven geotextile according to raw materials. It has the advantages of light weight, low cost, corrosion resistance, and excellent performance of reverse filtration, drainage, isolation, reinforcement, etc. In particular, non-woven polypropylene material has reverse filtration, drainage, anti-seepage, reinforcement and protection functions, and has been widely used in high-speed rail, highway, water conservancy, environment and port major infrastructure projects.

[0003] Geotextile has good bearing capacity, which can improve the tensile strength and deformation capacity of soil, improve the stability of building structure, and improve the quality of soil. The concentrated stress is effectively dispersed, transmitted or decomposed to prevent the soil from being damaged by external force. On the other hand, needle-punched geotextile is a good water guide material that can form a drainage ditch in the soil to remove excess liquid and gas from the soil structure; when water flows from fine soil layer to coarse soil layer, the water permeability and water permeability of needle-punched geotextile are good, allowing water to pass through and effectively retaining particles, fine sand, small stones, etc.

[0004] The fiber network structure of geotextile has good water permeability and interception and filtration effect, and during long-term use, microorganisms in the soil and inorganic salts such as calcium ions and magnesium ions in water tend to accumulate on the surface of the geotextile fibers and at the intersection of the fibers, resulting in the formation of scale, which reduces the fiber network voids and ultimately affects the flow of fluid. The current solution to scale inhibition of geotextile is relatively single, mostly by improving the void structure of geotextile or by adding chemical additives, or by adding scale inhibitors to the polypropylene masterbatch to control the fiber surface to achieve scale inhibition effect, but these methods have the defects of limited scale inhibition effect, poor durability and influence on fiber strength and other properties.

[0005] Surface coating modification technology is an efficient and convenient post-processing method, which has flexible processing method, high adaptability to substrate and small damage to substrate. It is very suitable for processing post-treatment of geotextile synthetic material which maintains physical strength and other properties. The main coating methods include doctor blade method, doctor bar method, spray method and flow casting method, etc. The doctor blade and hanging bar are suitable for coating load of high viscosity coating and polymer, the flow casting method is suitable for coating load of medium and low concentration polymer, the spray method is suitable for uniform coating load of low viscosity polymer. In addition, for geotextile with synthetic material as substrate, there is a problem of uneven load in some areas for spray or flow casting. For some customized requirements (such as certain coating thickness requirement, highly uniform coating, etc.), whether the spray coating of the key area is uniform and meets the requirements, there is no good processing method for the related detection at present, and manual inspection has the problem of low detection accuracy. SUMMARY

[0006] To achieve the above object, the application provides a method for preparing scale-inhibiting and antibacterial geotextile synthetic material by coating modification, which comprises the following steps: providing raw materials, wherein the raw materials comprise 7 parts of hexagonal boron nitride, 0.4 parts of graphene oxide, 0.1 parts of dispersant, 10 parts of adhesive emulsion, 1 part of antibacterial agent, 1 part of cationic polymer, 0.5 parts of viscosity regulator and 80 parts of water; mixing the raw materials by stirring and dispersing to obtain scale-inhibiting polymer modified coating for geotextile synthetic material; mixing the raw materials by stirring and dispersing to obtain scale-inhibiting polymer modified coating for geotextile synthetic material, which specifically comprises: preparing pigment dispersion liquid, adding adhesive components and adding functional components, loading the scale-inhibiting polymer modified coating to the surface of geotextile synthetic material fiber by spray coating or coating flow casting penetration; further comprising surface coating detection process of geotextile synthetic material fiber.

[0007] Preferably, in the above scheme, the scale-inhibiting polymer modified coating for geotextile synthetic material obtained by mixing the raw materials by stirring and dispersing specifically comprises: preparing pigment dispersion liquid, adding adhesive components and adding functional components.

[0008] Preferably, in the above scheme, the preparation of the pigment dispersion liquid comprises: putting the dispersant into water, stirring at a certain speed until uniform, then adding hexagonal boron nitride and graphene oxide into the water containing the dispersant, and continuing to stir until uniform to obtain the pigment dispersion liquid.

[0009] Preferably, in the above scheme, the dispersant is prepared by the following steps: mixing 0.08-0.12 parts of sodium hexametaphosphate, 5-8 parts of hexagonal boron nitride and 0.3-0.5 parts of graphene oxide by weight, and stirring the mixed raw materials, the stirring speed is 90-130 revolutions per minute, and the stirring time is 20-40 minutes.

[0010] Preferably, in the above scheme, the adding of the adhesive component comprises: adding an adhesive emulsion into the pigment dispersion liquid, stirring at a rotation speed of 120 rpm until uniform, to obtain an adhesive-combined coating base.

[0011] Preferably, in the above scheme, the adhesive is an acrylic polymer emulsion, the solid content of the acrylic polymer emulsion is 25%, and the adding amount is 8-12 parts by weight.

[0012] Preferably, in the above scheme, the adding of the functional component comprises: adding an antibacterial agent, a cationic polymer, and a viscosity regulator into the adhesive-combined coating base, and stirring until uniform, to obtain a scale-inhibiting polymer modified coating.

[0013] Preferably, in the above scheme, the antibacterial agent is a quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, the adding amount is 0.5-1.5 parts by weight; the cationic polymer is cationized chitosan, the adding amount is 0.6-1.4 parts by weight; and the viscosity regulator is sodium carboxymethyl cellulose, the adding amount is 0.3-0.5 parts by weight.

[0014] Preferably, in the above scheme, the geotextile synthetic material fiber is a non-woven geotextile prepared from one or more of polyester fiber, polypropylene fiber, nylon fiber, or polyethylene fiber; and the scale-inhibiting polymer modified coating is loaded onto the surface of the geotextile synthetic material fiber by spray coating or coating flow penetration, specifically: the scale-inhibiting polymer modified coating is coated onto the geotextile synthetic material fiber by spray coating, and a modified geotextile synthetic material is obtained by rapid high-temperature drying; or the scale-inhibiting polymer modified coating is penetrated and loaded under vacuum negative pressure by flow coating, and a modified geotextile synthetic material is obtained after hot air drying.

[0015] A coated detection area is selected, and the coating thickness of a target point area in the relevant area is detected by image acquisition, the target point representing an important area endpoint of the detection area, and the target point selection method is as follows:

[0016] A center position of the coated detection area is selected as a core point Xi, where i = 1, k objects are selected around the core point Xi as candidate target points, and the candidate target points are Yj, where j = 1, 2, 3, …, k; and the average distance between the core point Xi and the candidate target point Yj is calculated.

[0017]

[0018] According to the above calculation results, the distance D between the core point X and the selected target point Y is taken as the selection distance, and the circle with the distance mean D as the distance and the core point X as the center is taken as the key detection area for paint thickness image detection, where i = 1, j = 1, 2, 3, …, k,

[0019] After multiple detections, the mean optimized target point Yu of the selected target point Yj on the circumference of the circle with the core point X as the center can be selected according to the detection results each time,

[0020]

[0021] The recorded mean optimized target point Yu of Yj can be directly selected as the corrected target point; or

[0022] The modified geotextile composite material is obtained by penetrating the scale-inhibiting polymer modified coating under vacuum negative pressure and hot air drying,

[0023] The center position of the coated detection area is selected as the core point X, where i = 1, and k objects around the core point X are selected as the selected target point, and the selected target point Yj, where j = 1, 2, 3, …, k. The distance mean between the core point X and the selected target point Yj is calculated:

[0024] The center position of the coated detection area is selected as the core point X, where i = 1, and k objects around the core point X are selected as the selected target point, and the selected target point Yj, where j = 1, 2, 3, …, k. The distance mean between the core point X and the selected target point Yj is calculated:

[0025]

[0026] According to the above calculation results, the distance D between the core point X and the selected target point Y is taken as the selection distance, and the circle with the distance mean D as the distance and the core point X as the center is taken as the key detection area for paint thickness image detection, where i = 1, j = 1, 2, 3, …, k,

[0027] After multiple detections, the mean optimized target point Yu of the selected target point Yj on the circumference of the circle with the core point X as the center can be selected according to the detection results each time,

[0028]

[0029] The recorded mean optimized target point Yu of Yj can be directly selected as the corrected target point.

[0030] Preferably, the mean optimization target point Yu of the recorded Yj can be directly selected as the corrected target point. After connecting multiple mean optimization target points Yu, a key area to be detected can be directly formed. This key area to be detected can be used as the optimized detection position of the area to be detected after coating or after casting.

[0031] Preferably, in the above scheme, the viscosity of the scale-inhibiting polymer modified coating is between 3-15 mpa.s; in the spray coating method, the rapid high-temperature temperature is 60-110℃; in the casting coating method, the load vacuum is -0.6-0.8 MPa; the hot air drying temperature is 105℃; and the coating load speed is 80-120 m / min.

[0032] Compared with existing technologies, the present invention has the following beneficial effects: Based on the characteristics and adaptability of surface coating technology, in order to overcome the shortcomings of the above-mentioned scaling and scale inhibition strategies for geotextile synthetic materials, geotextile synthetic materials with different raw materials are used as the substrate. Through coating technology, medium and low concentrations of amphiphilic polymers and antibacterial polymers are loaded onto the geotextile synthetic materials. After drying and cross-linking, an amphiphilic coating and effective functional groups that repel calcium and magnesium ions are formed on the surface of the geotextile fibers. At the same time, it has the function of inhibiting the generation of microbial aggregation, thereby prolonging the scaling time of the geotextile synthetic materials and slowing down its performance degradation. Furthermore, for geotextiles with synthetic materials as the substrate, spraying or casting still has the problem of uneven loading in some areas. For some customized requirements (such as certain coating thickness requirements, highly uniform coating, etc.), whether the coating is uniform, especially whether the spraying in key areas meets the requirements, can be accurately detected through the technical solution of the present invention. This improves accuracy and is conducive to optimizing the coating scheme, and also facilitates the timely investigation of defective products. Attached Figure Description

[0033] Figure 1 This is a flowchart of a method according to an embodiment of the present invention.

[0034] Figure 2 The following is a flowchart of a method according to another embodiment of the present invention. Figure 2 a- Figure 2 d is a schematic diagram illustrating the application of a coating thickness detection method according to an embodiment of the present invention. Detailed Implementation

[0035] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0036] Figure 1 This is a flowchart of a method according to an embodiment of the present invention. As shown in the figure, the method of the present invention includes the following steps:

[0037] Step 1: providing raw materials, wherein the raw materials include 7 parts of hexagonal boron nitride, 0.4 parts of graphene oxide, 0.1 parts of dispersant, 10 parts of adhesive emulsion, 1 part of antibacterial agent, 1 part of cationic polymer, 0.5 parts of viscosity regulator, and 80 parts of water by weight;

[0038] Step 2: mixing the raw materials by stirring and dispersing to obtain a scale-inhibiting polymer modified coating for geotextile synthetic material;

[0039] Step 3: loading the scale-inhibiting polymer modified coating to the surface of the geotextile synthetic material fiber by spray coating or coating flow casting penetration.

[0040] Step 4: further including a surface coating thickness detection process of the geotextile synthetic material fiber.

[0041] Example 1

[0042] 0.08 parts of sodium hexametaphosphate is put into 80 parts of water, stirred at a speed of 90 rpm until uniform, then 5 parts of hexagonal boron nitride, 0.3 parts of graphene oxide are added to the water containing the dispersant, stirred for 20 minutes until uniform to obtain a pigment dispersion liquid; then 8 parts of acrylic polymer emulsion is added, stirred until uniform, then 0.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 0.6 parts of cationic chitosan, 0.3 parts of sodium carboxymethyl cellulose are added, stirred uniformly to obtain a scale-inhibiting modified coating; with polypropylene fiber non-woven geotextile as the base cloth, the coating is coated by spray coating, the coating viscosity is controlled between 4-5 mpa.s, the drying temperature is 105℃; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0043] Example 2

[0044] 0.10 parts of sodium hexametaphosphate is put into 80 parts of water, stirred at a speed of 110 rpm until uniform, then 5-8 parts of hexagonal boron nitride, 0.4 parts of graphene oxide are added to the water containing the dispersant, stirred for 30 minutes until uniform to obtain a pigment dispersion liquid; then 10 parts of acrylic polymer emulsion is added, stirred until uniform, then 1 part of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1 part of cationic chitosan, 0.4 parts of sodium carboxymethyl cellulose are added, stirred uniformly to obtain a scale-inhibiting modified coating; with polypropylene fiber non-woven geotextile as the base cloth, the coating is coated by spray coating, the coating viscosity is controlled between 4-5 mpa.s, the drying temperature is 80℃; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0045] Example 3

[0046] Put 0.12 parts of sodium hexametaphosphate into 80 parts of water, stir at 130 rpm until uniform, then add 8 parts of hexagonal boron nitride, 0.5 parts of graphene oxide into the water containing dispersant, stir for 40 minutes until uniform to obtain a pigment dispersion liquid; then add 12 parts of acrylic polymer emulsion, stir until uniform, then add 1.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1.4 parts of cationic chitosan, add 0.5 parts of sodium carboxymethyl cellulose, stir uniformly to obtain a scale inhibition modified coating; take polypropylene fiber non-woven geotextile as the base cloth, coat the coating under the condition of 0.8 MPa negative pressure, control the coating viscosity at about 15 mpa.s, the hot air drying temperature is 105°C; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0047] Example 4

[0048] Put 0.12 parts of sodium hexametaphosphate into 80 parts of water, stir at 130 rpm until uniform, then add 8 parts of hexagonal boron nitride, 0.5 parts of graphene oxide into the water containing dispersant, stir for 40 minutes until uniform to obtain a pigment dispersion liquid; then add 12 parts of acrylic polymer emulsion, stir until uniform, then add 1.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1.4 parts of cationic chitosan, add 0.5 parts of sodium carboxymethyl cellulose, stir uniformly to obtain a scale inhibition modified coating; take polypropylene fiber non-woven geotextile as the base cloth, coat the coating under the condition of 0.8 MPa negative pressure, control the coating viscosity at about 15 mpa.s, the hot air drying temperature is 105°C; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0049] Example 5

[0050] Put 0.12 parts of sodium hexametaphosphate into 80 parts of water, stir at 130 rpm until uniform, then add 8 parts of hexagonal boron nitride, 0.5 parts of graphene oxide into the water containing dispersant, stir for 40 minutes until uniform to obtain a pigment dispersion liquid; then add 12 parts of acrylic polymer emulsion, stir until uniform, then add 1.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1.4 parts of cationic chitosan, add 0.5 parts of sodium carboxymethyl cellulose, stir uniformly to obtain a scale inhibition modified coating; take polypropylene fiber non-woven geotextile as the base cloth, coat the coating under the condition of 0.8 MPa negative pressure, control the coating viscosity at about 15 mpa.s, the hot air drying temperature is 105°C; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0051] Example 6

[0052] Put 0.12 parts of sodium hexametaphosphate into 80 parts of water, stir at 130 rpm until uniform, then add 8 parts of hexagonal boron nitride, 0.5 parts of graphene oxide into the water containing dispersant, stir for 40 minutes until uniform to obtain a pigment dispersion liquid; then add 12 parts of acrylic polymer emulsion, stir until uniform, then add 1.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1.4 parts of cationic chitosan, add 0.5 parts of sodium carboxymethyl cellulose, stir uniformly to obtain a scale inhibition modified coating; take polypropylene fiber non-woven geotextile as the base cloth, coat the coating under the condition of 0.8 MPa negative pressure, control the coating viscosity between 15 mpa.s, the hot air drying temperature is 105℃; the coating speed is 80 meters / minute, to obtain a modified geotextile synthetic material.

[0053] Example 7

[0054] Put 0.12 parts of sodium hexametaphosphate into 80 parts of water, stir at 130 rpm until uniform, then add 8 parts of hexagonal boron nitride, 0.5 parts of graphene oxide into the water containing dispersant, stir for 40 minutes until uniform to obtain a pigment dispersion liquid; then add 12 parts of acrylic polymer emulsion, stir until uniform, then add 1.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1.4 parts of cationic chitosan, add 0.5 parts of sodium carboxymethyl cellulose, stir uniformly to obtain a scale inhibition modified coating; take polyester fiber non-woven geotextile as the base cloth, coat the coating under the condition of 0.8 MPa negative pressure, control the coating viscosity between 15 mpa.s, the hot air drying temperature is 105℃; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0055] Example 8

[0056] Put 0.12 parts of sodium hexametaphosphate into 80 parts of water, stir at 130 rpm until uniform, then add 8 parts of hexagonal boron nitride, 0.5 parts of graphene oxide into the water containing dispersant, stir for 40 minutes until uniform to obtain a pigment dispersion liquid; then add 12 parts of acrylic polymer emulsion, stir until uniform, then add 1.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1.4 parts of cationic chitosan, add 0.5 parts of sodium carboxymethyl cellulose, stir uniformly to obtain a scale inhibition modified coating; take nylon fiber non-woven geotextile as the base cloth, coat the coating under the condition of 0.8 MPa negative pressure, control the coating viscosity between 15 mpa.s, the hot air drying temperature is 105℃; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0057] Example 9

[0058] Put 0.12 parts of sodium hexametaphosphate into 80 parts of water, stir to uniformity at a speed of 130 revolutions per minute, then add 8 parts of hexagonal boron nitride, 0.5 parts of graphene oxide into the water containing the dispersant, stir for 40 minutes until uniformity to obtain a pigment dispersion liquid; then add 12 parts of acrylic polymer emulsion, stir to uniformity, then add 1.5 parts of quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, 1.4 parts of cationic chitosan, add 0.5 parts of sodium carboxymethyl cellulose, stir to uniformity to obtain a scale inhibition modified coating; take polyethylene fiber non-woven geotextile as the base cloth, coat the coating under the condition of 0.8 MPa negative pressure, control the coating viscosity between 15 mpa.s, the hot air drying temperature is 105 DEG C; the coating speed is 100 meters / minute, to obtain a modified geotextile synthetic material.

[0059] Comparative Example 1

[0060] The polypropylene fiber geotextile synthetic material uncoated base cloth is taken as Comparative Example 1.

[0061] Comparative Example 2

[0062] The polyester fiber geotextile synthetic material uncoated base cloth is taken as Comparative Example 2.

[0063] Comparative Example 3

[0064] The nylon fiber geotextile synthetic material uncoated base cloth is taken as Comparative Example 3.

[0065] Comparative Example 4

[0066] The nylon fiber geotextile synthetic material uncoated base cloth is taken as Comparative Example 3.

[0067] Scale inhibition performance test

[0068] The scale inhibition performance test method of the scale inhibition geotextile synthetic material of the present application is as follows: high concentration hard water with Ca 2+ , Mg 2+ concentration of 500 mg / L is prepared with anhydrous CaCl2, MgCl2 and NaHCO3. The sample with a length of 10 cm and a width of 10 cm is placed in a glass beaker with a capacity of 5 L, a digital electric stirrer is installed on the cover plate, a mercury thermometer is used, and the sample is stirred in a constant temperature water bath at 25 DEG C for 3 days, then taken out, dried and weighed, and the weight gain m / (mg·cm -2 ) of each group of samples per unit area is calculated.

[0069] Table 1 Measurement results of the water scale performance of polypropylene geotextile synthetic materials of Examples 1-9 and Comparative Examples 1-4

[0070]

[0071] The influence of different loadings shown in Example 9 on water scaling performance further illustrates that the scale inhibition performance of the scale inhibition geotextile composite material of the present application has excellent effect, which has already possessed outstanding effect compared with the prior art, on this basis, the further fine optimization of the present application is: coating amount and uniformity In addition to some special customization requirements, coating uniformity will also have a certain degree of influence on water scaling performance, for example, coating loss or unevenness will affect the scaling performance of some areas, and combined with the surface coating detection process of the geotextile composite material fiber related to the present application, important reference data and accurate detection methods can be provided, further improving the performance of the product prepared by the method of coating modification of the scale inhibition and antibacterial geotextile composite material of the present application and the detection of related products.

[0072] Example 10

[0073] Reference Figure 2 As described above, image acquisition can use conventional acquisition devices such as cameras, and data and algorithm processing is realized by conventional computing and processing devices such as computers, processors and memories storing computer programs, and the like. In this embodiment, only example is described, and those skilled in the art know that electronic devices including but not limited to the above can be used to realize the present embodiment.

[0074] Whether the coating thickness meets the standard can be manually input into the computer for setting, or can be specified according to the requirements of the prepared product. When the computer system forms a record, the coating thickness of the detected area of the coated fabric is ensured to meet the requirements, and the quality of the final product can be accurately and efficiently detected, thereby facilitating the improvement of the spraying process and the troubleshooting of possible abnormal conditions in the spraying process. However, detecting all areas will result in low efficiency and large calculation data. The embodiment of the present application selects appropriate key detection positions for detection by computer algorithm, which ensures accuracy while improving efficiency, and solves the problem of how to detect and accept the coating thickness after the geotextile is made by the coating method of the present application.

[0075] As Figure 2 As shown in a, the T area is the detected area after coating, and the coating thickness of the target point area of the related area is detected by image acquisition. Different thicknesses, color depths and gray scales will produce different effects, especially after image acquisition and computer processing, the gray scale difference can be more accurately detected, Figure 2 As shown in a, the Q area is an abnormal thickness area, and the other areas are normal areas.

[0076] Further referring to Figure 2 b- Figure 2c, after selecting the coated area to be detected T, the target point is selected, the center position of the coated area to be detected is selected as the core point Xi, and k objects are selected around the core point Xi as the candidate target point position Yj, where j = 1, 2, 3, …, k; the average distance between the core point Xi and the candidate target point position Yj is calculated:

[0077]

[0078] According to the above calculation results, the distance D between the core point Xi and the candidate target point position Yj is selected as the selection distance. Since the clustering and data optimization calculation by the above algorithm, the distance D at this time has actually covered the main positions that can represent the overall coating condition of the area to be detected T. The circle with the distance average D as the distance and the core point Xi as the center is selected as the key detection area for paint thickness image detection. At this time, the detection result can cover the abnormal area Q, so as to quickly find out the abnormal area and further investigate all abnormal areas. In the next detection of the same size product, the circle with the distance D as the radius and the core point Xi as the center can be used as the key detection area, which represents the overall coating condition of the area to be detected T.

[0079] Reference Figure 2 d, further, after multiple detections, the average optimized target point position Yu of the candidate target point position Yj can be selected on the circumference of the core point Xi:

[0080]

[0081] Similarly, the recorded average optimized target point position Yu of Yj can be directly selected as the corrected target point position. After connecting multiple average optimized target point positions Yu, the key area of the area to be detected can be directly formed, (and Figure 2 b- Figure 2 c, the selection method is slightly different. On this basis, a sufficient number of points can be directly selected, and it is not necessary to select one complete circular area as in Figure 2 b- Figure 2 c, only the area connected by multiple points can be used as the optimized key detection area. A sufficient number of points means that at least a part of each area of the above four equal parts of the circle should be covered. In this way, on the basis of ensuring detection accuracy, the area of the detection area is further reduced, and the detection efficiency is improved. The key area of the area to be detected can be used as the optimized detection position of the coated area to be detected or the cast area to be detected.

[0082] It should be understood that the foregoing detailed description of the application, rather than limiting the application, is intended to explain and describe the current implementation of the application. Therefore, any modification, equivalent replacement or improvement made without departing from the spirit and scope of the application should be included in the protection scope of the application. In addition, the appended claims of the application are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent form of such scope and boundary.

Claims

1. A method for the preparation of a soil geotextile synthetic material with antifouling and antibacterial properties by coating modification, characterized by, The method comprises the following steps: The raw materials comprise 7 parts of hexagonal boron nitride, 0.4 parts of graphene oxide, 0.1 parts of a dispersing agent, 10 parts of an adhesive emulsion, 1 part of an antibacterial agent, 1 part of a cationic polymer, 0.5 parts of a viscosity regulator and 80 parts of water by weight; The raw materials are mixed by stirring and dispersing to obtain the scale-inhibiting polymer modified coating for geotextile synthetic materials, specifically including: preparing a pigment dispersion liquid, adding an adhesive component and adding a functional component, The scale-inhibiting polymer modified coating is loaded onto the surface of the geotextile synthetic material fiber in a spraying coating or coating flow casting penetration manner, specifically including: the scale-inhibiting polymer modified coating is coated onto the geotextile synthetic material fiber by the spraying coating manner, and the modified geotextile synthetic material is obtained by rapid high-temperature drying; or the scale-inhibiting polymer modified coating is penetrated and loaded under vacuum negative pressure by the flow coating manner, and the modified geotextile synthetic material is obtained after hot air drying, Further, a geotextile synthetic material fiber surface coating thickness detection process is performed, and the surface coating thickness detection process specifically includes: A coated detection area is selected, and the coating thickness of a target point area of the related area is detected by image acquisition, and the target point represents an end point of a key area of the detection area, and the target point selection method is as follows: A center position of the coated detection area is selected as a core point Xi, wherein i = 1, k objects are selected around the core point Xi as candidate target points, the candidate target points are Yj, wherein j = 1, 2, 3, …, k, and the average distance between the core point Xi and the candidate target point Yj is calculated: According to the calculation result, the distance D between the core point Xi and the candidate target point Yj is taken as the selected distance, and the circle with the average distance D as the distance and the core point Xi as the center is taken as the key detection area for coating thickness image detection, wherein i = 1, j = 1, 2, 3, …, k, After multiple detections, the average optimized target point Yu of the candidate target points Yj is selected on the circumference of the circle with the core point Xi as the center according to the detection result each time, The average optimized target point Yu of Yj is recorded as the corrected target point for direct selection, and the multiple average optimized target points Yu are connected to directly form a key area of the detection area, which is an optimized detection position of the coated detection area or the flow-coated detection area.

2. The method of claim 1, wherein, The preparation of the pigment dispersion liquid includes: the dispersing agent is put into water, stirred until uniform, then the hexagonal boron nitride and the graphene oxide are added into the water containing the dispersing agent, and continue to stir until uniform to obtain the pigment dispersion liquid.

3. The method of claim 2, wherein, The adhesive component includes: the adhesive emulsion is added into the pigment dispersion liquid, and stirred at a speed of 120 revolutions per minute until uniform to obtain the adhesive composite coating base.

4. The method of claim 3, wherein, The adhesive is an acrylic polymer emulsion, and the solid content of the acrylic polymer emulsion is 25%.

5. The method of claim 4, adding a functional component comprises: The antibacterial agent, the cationic polymer and the viscosity regulator are added into the adhesive composite coating base, and stirred until uniform to obtain the scale-inhibiting polymer modified coating.

6. The method of claim 5, wherein the antibacterial agent is quaternary ammonium salt antibacterial agent dodecyl trimethyl ammonium chloride, the cationic polymer is cationized chitosan, and the viscosity modifier is sodium carboxymethyl cellulose.

7. The method of claim 5, wherein the antifouling polymer modified coating has a viscosity of 3-15 mpa.s; in a spray coating method, the fast high temperature is 60-110°C; in a flow coating method, the load vacuum is negative 0.6-0.8 MPa; the hot air drying temperature is 105°C; and the coating load speed is 80-120 meters / minute.

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