Anti-fouling curtain structure for water dredging engineering

Abstract

The invention discloses an anti-fouling curtain structure for water dredging engineering, and belongs to the technical field of environment protection of dredging engineering, the anti-fouling curtain structure for water dredging engineering comprises a floating body, an anti-fouling curtain and a vertical body, the floating body is arranged at the top end of the anti-fouling curtain, the vertical body is arranged at the bottom end of the anti-fouling curtain, and the anti-fouling curtain is geotechnical cloth; the geotechnical cloth is prepared from the following components in parts by weight: 100 to 150 parts of polyester, 20 to 50 parts of copolyester and 5 to 30 parts of inorganic filler, the copolyester is a copolymer of terephthalic acid, 5-sulfoisophthalic acid sodium salt, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole, and the geotechnical cloth is further prepared by a post-treatment step. According to the invention, the copolyester composed of terephthalic acid, sodium 5-sulfoisophthalic acid, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole and the inorganic filler are added into the polyester fiber, and the polyester fiber is modified through a post-treatment step, so that the alkali resistance and the antifouling property of the antifouling curtain are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the dredging engineering environmental protection technical field, specifically to a water dredging engineering anti-pollution curtain structure. BACKGROUND

[0002] In the process of channel upgrading and water conservancy construction, dredging engineering is the key link to improve the navigation capacity, but its construction process is often accompanied by significant ecological environment disturbance, especially in sensitive areas (adjacent to bridges, municipal buildings, traffic arteries, etc.) facing multiple technical challenges. As Xiangjiang River is an important navigation channel and ecological corridor in the middle reaches of the Yangtze River, the dredging engineering for channel upgrading construction needs to consider navigation demand, structural safety and environmental protection, so the diffusion of water suspended matter formed by dredging and reclamation becomes an important factor affecting the environment, and how to reduce the environmental impact of the diffusion of suspended matter on the surrounding water area is of great concern, and the anti-pollution curtain technology is one of the effective means to solve this problem.

[0003] The anti-pollution curtain is a device for preventing the diffusion of suspended matter pollution, which can effectively isolate the limited water area from the outside during construction, thereby preventing the large-scale diffusion of turbid water and suspended matter. For some substances that are not easy to precipitate in a short time, controlling them in a limited area can provide enough residence time for them to settle out of suspension, thereby reducing soil loss to other areas and avoiding possible negative effects. It has a great effect on water environment protection during dredging and reclamation of rivers, lakes and seas. At present, the main components of domestic anti-pollution curtains are PVC plastic cloth and geotextile. Among them, geotextile is commonly made of polypropylene spun-bonded needle-punched geotextile and polyester geotextile. Polyester geotextile has high tensile strength, good water permeability, good wear resistance and good anti-aging performance, and good ultraviolet resistance, suitable for long-term exposure to sunlight. In China, the first ranked material used in geotextile is polyester fiber. However, polyester fiber has poor alkali resistance, especially in the alkaline environment caused by sand and gravel concrete injection engineering after dredging, which can easily cause hydrolysis reaction, resulting in performance degradation. In addition, due to long-term placement in water, it is inevitable that there will be problems of mud and algae attachment, thereby affecting the recycling of the anti-pollution curtain. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the present application provides a water dredging engineering anti-pollution curtain structure, which is modified by adding copolyester composed of terephthalic acid, m-phenylenediamine-5-sodium sulfonate, ethylene glycol and double-hydroxyl-terminated polyvinyl imidazole and inorganic fillers to polyester and post-treatment steps, thereby improving the alkali resistance and anti-pollution performance of polyester geotextile.

[0005] The technical solution to achieve the purpose of the present application is as follows: The application discloses a curtain structure for preventing pollution in water dredging engineering, which comprises a floating body, a pollution-preventing curtain and a vertical body, the floating body is arranged at the top end of the pollution-preventing curtain, the vertical body is arranged at the bottom end of the pollution-preventing curtain, and the pollution-preventing curtain is a geotextile; the geotextile comprises the following components in parts by weight: 100-150 parts of polyester, 20-50 parts of copolyester, and 5-30 parts of inorganic filler; the copolyester is a copolymer of terephthalic acid, 5-sodium sulfonated isophthalic acid, ethylene glycol and double-hydroxyl-terminated polyvinyl imidazole, and the structure of the double-hydroxyl-terminated polyvinyl imidazole is shown in formula 1. Formula 1 The geotextile further comprises a post-treatment step, the post-treatment step is that the geotextile is soaked in an ethanol solution of 1,3-propane sulfone and bromotetradecane, is surface treated at 60-70 DEG C for 4-6 hours, and finally is washed with water to obtain the geotextile.

[0006] Preferably, the floating body is one or a combination of the other of a floating ball and a foam plate; and the vertical body is a concrete block. Preferably, three floating balls or three foam plates are bundled every 1 m at a position 8-12 cm below the top end of the pollution-preventing curtain, and the floating balls or the foam plates are wrapped in the pollution-preventing curtain, so that the floating balls or the foam plates generate buoyancy to ensure that the top end of the pollution-preventing curtain floats on the water surface and can block the diffusion of mud; and preferably, the vertical bodies are arranged every 1-5 m at the bottom end of the pollution-preventing curtain, so that the bottom end of the pollution-preventing curtain is tightly attached to the mud surface and the sewage cannot seep out from the bottom, and the vertical bodies are wrapped in the pollution-preventing curtain.

[0007] Preferably, the molar ratio of the terephthalic acid to the 5-sodium sulfonated isophthalic acid is (7-9):(1-3); the molar ratio of the ethylene glycol to the double-hydroxyl-terminated polyvinyl imidazole is (7-9):(1-3); and the molar ratio of the terephthalic acid and the 5-sodium sulfonated isophthalic acid to the ethylene glycol and the double-hydroxyl-terminated polyvinyl imidazole is (0.8-1.2):1.

[0008] Preferably, the molar ratio of the 1,3-propane sulfone to the bromotetradecane is (1-1.5):1.

[0009] The imidazole ring on the surface of the polyester fiber is modified by the 1,3-propane sulfone and the bromotetradecane, so that the quaternary ammonium group and the zwitterion group are introduced on the surface of the geotextile, the zwitterion group is beneficial to the formation of a hydration barrier on the surface of the geotextile, the imidazole group and the quaternary ammonium group have antibacterial effects, the biological degradation of the organisms adhered to the geotextile is realized, the anti-pollution performance of the geotextile is improved, and the recycling of the geotextile is facilitated.

[0010] Preferably, the preparation method of the double-hydroxyl terminated polyvinylimidazole is: dissolving vinylimidazole and azobisisobutyronitrile (the amount of the azobisisobutyronitrile is 0.05-0.1 wt% of the vinylimidazole) in tetrahydrofuran under a nitrogen atmosphere, stirring and reacting at 60-70℃ for 10-18 hours, adding 1-thioglycerol as a chain transfer agent (the amount of the 1-thioglycerol is 10-25 wt% of the vinylimidazole), and obtaining the double-hydroxyl terminated polyvinylimidazole after purification and drying.

[0011] Preferably, the preparation method of the copolyester is: pre-mixing terephthalic acid, sodium 5-sulfonate isophthalic acid, ethylene glycol, double-hydroxyl terminated polyvinylimidazole, a catalyst and an antioxidant in an autoclave reactor, heating to 180-230℃ under a nitrogen atmosphere to perform esterification, ending the reaction when the amount of distilled water is 95-98% of the theoretical amount of water, then adjusting the reaction conditions to 80-100 Pa vacuum and 250-280℃ to perform polycondensation, and obtaining the copolyester after quenching the molten product in a water bath and then vacuum drying at room temperature.

[0012] Preferably, the preparation method of the geotextile is: mixing polyester, copolyester and inorganic fillers in a mixer to obtain a uniform mixture, then feeding the mixture into a twin-screw extruder to perform melt extrusion, spinning and weaving to obtain the polyester geotextile.

[0013] Preferably, the antioxidant is at least one of hindered phenol antioxidants, phosphite antioxidants or sulfide antioxidants, and the amount of the antioxidant is 0.05-2 wt% of the total mass of the monomers.

[0014] Preferably, the catalyst is at least one of antimony-based catalysts, titanate-based catalysts and organotin-based catalysts, and the amount of the catalyst is 0.001-0.1 wt% of the total mass of the monomers.

[0015] Preferably, the inorganic filler is at least one of calcium carbonate, talc, aluminum oxide or silicon dioxide.

[0016] Advantages

[0017] The present application provides a water dredging engineering anti-fouling curtain structure, which is modified by adding a copolyester composed of terephthalic acid, sodium 5-sulfonate isophthalic acid, ethylene glycol and double-hydroxyl terminated polyvinylimidazole and an inorganic filler into polyester fibers and a post-processing step, thereby improving the alkali resistance and anti-fouling performance of the polyester geotextile. -The attack on the ester bond, its rigid structure reduces the molecular chain mobility, reduces the proportion of non-crystalline region, thereby improving the alkali resistance of the polyester geotextile, and the physical barrier effect of the inorganic filler also helps to slow down the penetration of the alkaline medium. In addition, through the reaction of 1,3-propane sulfolane treated by post-processing with imidazole groups, the zwitterionic structure is introduced on the surface of the fiber, the hydration effect reduces the adsorption of silt or algal organic matter, and the quaternary ammonium salt with long carbon chain is introduced by the quaternization reaction of bromotetradecane with imidazole groups, which has the effect of destroying the cell membrane of microorganisms and inhibiting the formation of algal and bacterial biofilms, thereby improving the antifouling effect of the antifouling curtain geotextile. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The infrared spectrum of the double-hydroxyl-terminated polyvinylimidazole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] In the embodiments, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are commercially available unless otherwise specified.

[0021] The raw materials used in the examples and comparative examples are described as follows: Polyester: fiber-grade polyester chips, brand FD502, Yizheng Chemical Fibre; Inorganic filler: aluminum oxide, brand Aluna-100, Guangzhou Jibisheng Science and Technology Industry Co., Ltd.; Catalyst: antimony acetate and dibutyltin dilaurate composite catalyst with a mass ratio of 1:1, commercially available; Antioxidant: antioxidant 1010 and antioxidant 168 compounded with a mass ratio of 1:1, Ciba Specialty Chemicals; Double-hydroxyl-terminated polyvinylimidazole: self-made, the preparation method is as follows: under a nitrogen atmosphere, 3g of vinyl imidazole and azobisisobutyronitrile are dissolved in 15ml of tetrahydrofuran, the addition amount of azobisisobutyronitrile is 0.05wt% of the vinyl imidazole, stirring is carried out at 70°C for 12 hours, 1-thio glycerol is added as a chain transfer agent, the addition amount of 1-thio glycerol is 20wt% of the vinyl imidazole, cooling to room temperature, centrifugal treatment, adding diethyl ether to precipitate the polymer, washing with ethyl acetate for three times, the product is dried at 40°C for 12 hours under vacuum, the structure of the double-hydroxyl-terminated polyvinylimidazole is analyzed by Fourier transform infrared spectroscopy (FT-IR), as shown in the attachedFigure 1 As shown in the infrared spectrum, the characteristic peaks of end group -OH, imidazole ring =C-H- and carbon chain -CH2 can be detected simultaneously, proving that the target product is successfully synthesized. The test conditions are: room temperature, Bruker VERTEX 70v spectrometer, wavelength range 4000-500 cm -1 The number average molecular weight is directly determined by gel permeation chromatography (GPC) to be 122000 g / mol, and the molecular weight distribution coefficient is 1.8.

[0022] The copolyester 1 is prepared by the following method: terephthalic acid, sodium m-phthalic acid-5-sulfonate, ethylene glycol, double-hydroxyl-terminated polyvinylimidazole, a catalyst and an antioxidant are pre-mixed in a high-pressure autoclave reactor, and then esterification is carried out under a nitrogen atmosphere by heating to 230℃, and the reaction is stopped when the amount of distilled water is 95% of the theoretical amount of water; then the reaction conditions are adjusted to 80Pa vacuum and 280℃ for polycondensation, and after the reaction is completed, the product in a molten state is quenched in a water bath, and then vacuum dried at room temperature for 48 hours to obtain the copolyester; wherein the molar ratio of the total moles of terephthalic acid and sodium m-phthalic acid-5-sulfonate to the total moles of ethylene glycol and double-hydroxyl-terminated polyvinylimidazole is 1:1.2; the molar ratio of terephthalic acid to sodium m-phthalic acid-5-sulfonate is 8:2, and the molar ratio of ethylene glycol to double-hydroxyl-terminated polyvinylimidazole is 8:2; The copolyester 2 is prepared by the following method: the difference compared with the preparation method of the copolyester 1 is that the molar ratio of terephthalic acid to sodium m-phthalic acid-5-sulfonate is 7:3, and the molar ratio of ethylene glycol to double-hydroxyl-terminated polyvinylimidazole is 7:3; The copolyester 3 is prepared by the following method: the difference compared with the preparation method of the copolyester 1 is that the molar ratio of terephthalic acid to sodium m-phthalic acid-5-sulfonate is 9:1, and the molar ratio of ethylene glycol to double-hydroxyl-terminated polyvinylimidazole is 9:1; The copolyester 4 is prepared by the following method: the difference compared with the preparation method of the copolyester 1 is that sodium m-phthalic acid-5-sulfonate is replaced by m-phthalic acid; The copolyester 5 is prepared by the following method: the difference compared with the preparation method of the copolyester 1 is that double-hydroxyl-terminated polyvinylimidazole is replaced by ethylene glycol; The component raw materials used in the embodiments and comparative examples of the present application are all commercially available raw materials unless otherwise specified, and the component raw materials used in each parallel experiment are all the same.

[0023] Example 1

[0024] The application discloses a curtain structure for preventing pollution in water dredging engineering, which comprises a floating body, a pollution-preventing curtain and a vertical body, the floating body is arranged at the top end of the pollution-preventing curtain, the vertical body is arranged at the bottom end of the pollution-preventing curtain, and the pollution-preventing curtain is a curtain structure formed by geotextile; the floating body is a polyethylene floating ball, three floating balls are bundled every 1 m at a position 10 cm below the top end of the pollution-preventing curtain, and the floating balls are wrapped in the pollution-preventing curtain, the floating force generated by the floating balls or foam plates ensures that the top end of the pollution-preventing curtain floats on the water surface; the vertical body is a concrete block, the vertical body is arranged every 3 m at the bottom end of the pollution-preventing curtain, so that the bottom end of the pollution-preventing curtain is tightly attached to the mud surface and the polluted water cannot seep out from the bottom, and the vertical body is wrapped in the pollution-preventing curtain; the pollution-preventing curtain is geotextile 1, the length of the pollution-preventing curtain is 50 m, and the height of the pollution-preventing curtain is set according to the annual hydrological data and the water level of the stage of a river, lake or sea to be dredged, so that the top end of the pollution-preventing curtain is higher than the water surface, and the overlapping length of two adjacent pollution-preventing curtains is 3 m.

[0025] The preparation method of the geotextile 1 comprises the following steps: 150 parts of polyester, 50 parts of copolyester 1 and 30 parts of inorganic filler are uniformly mixed in a mixing machine, then the mixture is fed into a double-screw extruder to be melt-extruded, and after spinning and weaving, polyester filament spun-bonded needled geotextile is obtained, and the unit area mass is 300 g / m 2 The geotextile is soaked in an ethanol solution of 1,3-propane sultone and bromotetradecane with a total molar concentration of 0.05 mol / L and a molar ratio of 1:1, and is subjected to surface treatment at 70 DEG C for 6 hours, and finally, the geotextile is washed to obtain the geotextile.

[0026] Example 2

[0027] Compared with example 1, the difference lies in that the copolyester 1 is replaced by copolyester 2 in the preparation method of the geotextile. Example 3

[0028] Compared with example 1, the difference lies in that the copolyester 1 is replaced by copolyester 3 in the preparation method of the geotextile. Comparative example 1 Compared with example 1, the difference lies in that the copolyester 1 is replaced by copolyester 4 in the preparation method of the geotextile. Comparative example 2 Compared with example 1, the difference lies in that the copolyester 1 is replaced by copolyester 5 in the preparation method of the geotextile. Comparative example 3 Compared with example 1, the difference lies in that the copolyester 1 is replaced by polyester in the preparation method of the geotextile. Comparative example 4 Compared with example 1, the difference lies in that no inorganic filler is added in the preparation method of the geotextile. Comparative example 5 Compared with example 1, the difference lies in that no post-treatment step is performed in the preparation method of the geotextile. Comparative example 6 The difference compared with Example 1 is that the molar ratio of 1,3-propane sultone and bromotetradecane in the post-processing step is 1:0; Comparative Example 7 The difference compared with Example 1 is that the molar ratio of 1,3-propane sultone and bromotetradecane in the post-processing step is 0:1.

[0029] The following performance tests were conducted on the prepared geotextile, and the results are shown in Table 1: (1) Tensile strength and elongation at break: tested according to the narrow strip method of 10 strip tensile test in SL235-2012 "Geosynthetic Testing Procedures", under wet conditions, and at least 3 samples were tested and averaged; (2) Water permeability: tested according to the constant water head method in GB / T 15789-2005 "Geotextiles and Related Products - Determination of Vertical Permeability under No Load", water temperature 20℃, and at least 3 samples were tested and averaged; the vertical permeability coefficient and water permeability of the geotextile were calculated; (3) Alkali resistance: after the test piece was placed in an alkaline test environment, the breaking strength retention rate of the geotextile sample after alkali corrosion was calculated according to GB / T 17632-1998 "Geotextiles and Related Products - Test Method for Acid and Alkali Resistance".

[0030] (4) Anti-fouling performance: anti-fouling performance includes anti-sand adhesion test and anti-algae adhesion performance test. The anti-bacterial test was carried out by coating plate method. The anti-sand adhesion test was prepared by mixing river sand and clay to a concentration of 500 mg / L. The test sample with a length of 10 cm and a width of 10 cm was placed in a 5 L suspension, and after constant temperature water bath stirring in a 25℃ constant temperature water bath for 3 days, it was taken out, dried and weighed, and the weight gain m / (g·m2) of each group of samples per unit area was calculated. ); Anti-algae adhesion performance test: mix 100g of algae culture medium (Yancheng Bainuo Biological Technology Co., Ltd.), 20ml of chlorella source (purchased from Yudafu) and 100L of water, stir uniformly, and cultivate in a glass jar or plastic bottle transparent container under 25℃ conditions for 7 days, with 12 hours of light per day and stirring 3 times a day. The test sample with a length of 10 cm and a width of 10 cm was placed in a 5L chlorella suspension, and after constant temperature water bath stirring in a 25℃ constant temperature water bath for 3 days, the surface of the chlorella was washed, and the algae on the surface of the geotextile were observed and analyzed by inverted fluorescence microscope, with a measuring scale of 200μm. Twenty fields of each sample were randomly selected for counting. The number of attached algae was counted by Image J software.

[0031] Table 1 Performance test results of geotextile

[0032] From the data of the examples and comparative examples, it can be seen that the geotextile made of the copolyester modified polyester fiber of examples 1~3 has the advantages of high strength, good water permeability, good alkali resistance and good antifouling property. The geotextile of comparative example 1 uses a copolyester not containing sodium 5-sulfoisophthalate modified, and the strength, alkali resistance and water permeability are all decreased. The geotextile of comparative example 2 does not contain a dihydroxy-terminated polyvinylimidazole at all, and lacks surface groups that can react in the post-treatment step, so the antifouling property is obviously decreased, and the alkali resistance is also decreased due to the lack of positive charges of the quaternary ammonium salt. From comparative examples 3 and 4, it can be seen that the copolyester and the inorganic filler can improve the alkali resistance and antifouling property of the polyester geotextile. From comparative examples 5~7, it can be seen that the post-treatment step has a greater impact on the antifouling property of the polyester geotextile. The zwitterionic group and the quaternary ammonium ion group form an antibacterial hydration layer on the surface of the polyester geotextile, effectively preventing the adsorption of mud and algae. When only the zwitterionic group is surface modified, the amount of mud adsorbed is less, but after the algae are adsorbed, the quaternary ammonium salt structure that can degrade the algae is lacking, so more algae are attached. When only the long-chain quaternary ammonium salt group is surface modified, the algae are not easily attached, but the mud is easily adsorbed.

[0033] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, and the application is not limited to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the specification. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A pollution prevention curtain structure for water dredging projects, characterized in that, The system includes a float, an antifouling curtain, and a pendant. The float is positioned at the top of the antifouling curtain, and the pendant is positioned at the bottom. The antifouling curtain is made of geotextile. The geotextile, by weight, comprises the following components: 100-150 parts polyester, 20-50 parts copolyester, and 5-30 parts inorganic filler. The copolyester is a copolymer of terephthalic acid, sodium isophthalate-5-sulfonate, ethylene glycol, and dihydroxy-terminated polyvinylimidazole. The structural formula of the dihydroxy-terminated polyvinylimidazole is shown in Formula 1. Formula 1; The geotextile also includes a post-treatment step, which involves immersing the geotextile in a solution of 1,3-propanesulfonyl lactone and bromotetradecane, surface treating it at 60-70°C for 4-6 hours, and finally washing it with water to obtain the geotextile.

2. The anti-fouling curtain structure for water dredging projects as described in claim 1, characterized in that, The molar ratio of terephthalic acid to sodium isophthalate-5-sulfonate is (7-9):(1-3); the molar ratio of ethylene glycol to dihydroxy-terminated polyvinylimidazole is (7-9):(1-3); and the molar ratio of terephthalic acid and sodium isophthalate-5-sulfonate to ethylene glycol and dihydroxy-terminated polyvinylimidazole is (0.8-1.2):

1.

3. The anti-fouling curtain structure for water dredging projects as described in claim 1, characterized in that, The molar ratio of 1,3-propanesulfonyl lactone to bromotetradecane is (1-1.5):

1.

4. The anti-fouling curtain structure for water dredging projects as described in claim 1, characterized in that, The method for preparing the dihydroxy-terminated polyvinylimidazole is as follows: under a nitrogen atmosphere, vinylimidazole and azobisisobutyronitrile are dissolved in tetrahydrofuran, wherein the amount of azobisisobutyronitrile added is 0.05-0.1 wt% of vinylimidazole. The mixture is stirred and reacted at 60-70°C for 10-18 hours. 1-Thioglycerol is added as a chain transfer agent, wherein the amount of 1-thioglycerol added is 10-25 wt% of vinylimidazole. After purification and drying, the dihydroxy-terminated polyvinylimidazole is obtained.

5. The anti-fouling curtain structure for water dredging projects as described in claim 1, characterized in that, The copolyester is prepared by premixing terephthalic acid, sodium isophthalate-5-sulfonate, ethylene glycol, dihydroxy-terminated polyvinylimidazole, catalyst, and antioxidant in a high-pressure reactor. Under a nitrogen atmosphere, the mixture is heated to 180-230°C for esterification. The reaction is terminated when the amount of water distilled is 95%-98% of the theoretical amount. Then, the reaction conditions are adjusted to 80-100 Pa vacuum and 250-280°C for polycondensation. After the reaction is completed, the molten product is quenched in a water bath and then vacuum dried at room temperature to obtain the copolyester.

6. The anti-fouling curtain structure for water dredging projects as described in claim 1, characterized in that, The preparation method of the geotextile is as follows: polyester, copolyester and inorganic filler are added to a mixer and mixed evenly, then fed into a twin-screw extruder for melt extrusion, and after spinning, the fabric is woven to obtain polyester geotextile.

7. The anti-fouling curtain structure for water dredging projects as described in claim 5, characterized in that, The antioxidant is at least one of hindered phenolic antioxidants, phosphite antioxidants, or thioether antioxidants, and the amount of the antioxidant added is 0.05-2 wt% of the total monomer mass.

8. The anti-fouling curtain structure for water dredging projects as described in claim 5, characterized in that, The catalyst is at least one of antimony-based catalysts, titanate catalysts, and organotin catalysts, and the amount of catalyst added is 0.001~0.1wt% of the total mass of the monomers.

9. The anti-fouling curtain structure for water dredging projects as described in claim 1, characterized in that, The inorganic filler is at least one of calcium carbonate, talc, alumina, or silicon dioxide.

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