High-performance composite geotextile and preparation method thereof

Abstract

The invention discloses a high-performance composite geotextile and a preparation method thereof, and relates to the technical field of geotextile, the high-performance composite geotextile sequentially comprises a functional protective layer, a fiber reinforced layer and a base layer from top to bottom; the functional protection layer is prepared from the following raw materials in parts by weight: 5-8 parts of 2-[3-(2H-benzotriazole-2-yl)-4-hydroxyphenyl] ethyl 2-methacrylate, 6-10 parts of 1-allyl-3-vinyl imidazole chlorine salt, 1-3 parts of 2, 4, 6-trivinyl boroxane, 1-3 parts of 3-(1, 2, 4-triazole-2-yl)-4-hydroxyphenyl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2-yl)-1, 2, 3-triazole-2 The invention relates to a high-temperature-resistant coating which is prepared from the following raw materials in parts by weight: 1-3 parts of 1, 1-difluoro-2-propylene-1-yl)-2 (1H)-quinoxalinone, 2-4 parts of vinyl trimethoxy silane and 0.1-0.3 part of an initiator. The composite geotextile is sufficient in mechanical property and good in antibacterial property and aging resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of geotextiles, and in particular to a high-performance composite geotextile and a preparation method thereof. Background Art

[0002] As a kind of geosynthetic material widely used in geotechnical engineering, water conservancy engineering, environmental engineering and other fields, geotextiles play important roles such as filtration, drainage, isolation, and reinforcement. With the continuous advancement of infrastructure construction and the increasing improvement of engineering requirements, higher requirements are also put forward for the performance of geotextiles.

[0003] In the prior art, traditional geotextiles generally have problems such as insufficient mechanical properties, single functions (such as lack of antibacterial properties and ultraviolet resistance), weak interlayer bonding, and still need to be further improved in terms of durability and impermeability. Just under this situation, composite geotextiles came into being, and their appearance has attracted wide attention in the industry. However, the existing composite geotextiles still have more or less technical defects such as insufficient interlayer bonding force, and still need to be further improved in terms of mechanical properties, antibacterial properties and aging resistance.

[0004] In order to solve the above problems, a Chinese invention patent with the authorized publication number of CN118906577B provides a composite geotextile, which sequentially includes a first protective layer, a strengthening layer, a fabric base layer, an antibacterial layer and a second protective layer from top to bottom; the first protective layer, the strengthening layer, the fabric base layer, the antibacterial layer and the second protective layer are all tightly connected by adhesives; the thickness ratio of the first protective layer, the strengthening layer, the fabric base layer, the antibacterial layer and the second protective layer is 1:0.8 - 1.0:0.6 - 0.9:1.3 - 1.8:0.3 - 0.6:1.2 - 1.5. By introducing the protective layer, the strengthening layer, and the antibacterial layer, and bonding the layers together to form an integral composite geotextile, it has excellent tensile strength, anti-deformation ability, antibacterial and other properties. However, the long-term stability of the adhesive is insufficient, and the interlayer bonding force needs to be further improved.

[0005] It can be seen that developing a high-performance composite geotextile with sufficient mechanical properties, good antibacterial and aging resistance and its preparation method meets the market demand, has broad market value and application prospects, and has very important significance for promoting the development of the composite geotextile field. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a high-performance composite geotextile with sufficient mechanical properties, good antibacterial and aging resistance and a preparation method thereof.

[0007] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0008] A high-performance composite geotextile, which sequentially includes a functional protection layer, a fiber reinforcement layer, and a base layer from top to bottom; the functional protection layer is made of the following raw materials by weight: 5-8 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 6-10 parts of 1-allyl-3-vinylimidazolium chloride, 1-3 parts of 2,4,6-trivinylcyclotriboroxane, 1-3 parts of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 2-4 parts of vinyltrimethoxysilane, and 0.1-0.3 parts of initiator.

[0009] Preferably, the thickness ratio of the functional protection layer, the fiber reinforcement layer, and the base layer is (0.5-0.8):(1.2-1.5):1.

[0010] Preferably, the initiator is azobisisobutyronitrile.

[0011] Preferably, the fiber reinforcement layer is made by blending polyacrylonitrile-based carbon fiber and polypropylene resin in a mass ratio of (2-3):(7-8).

[0012] Preferably, the grade of the polypropylene resin is H30S.

[0013] Preferably, the average diameter of the polypropylene-based carbon fiber is 3-7 μm, and the aspect ratio is (20-30):1.

[0014] Preferably, the base layer is a polyester fiber non-woven fabric layer.

[0015] Another object of the present invention is to provide a method for preparing the high-performance composite geotextile, which includes the following steps:

[0016] Step S1: Make polyester fibers from polyester chips through a melt spinning process, and then use the needling method to make the polyester fibers into a polyester fiber non-woven fabric base layer, controlling the unit area mass of the base layer to be 200-300 g / m 2 ;

[0017] Step S2: Mix polyacrylonitrile-based carbon fiber, polypropylene, and a coupling agent evenly to obtain a mixed material, make a mixed yarn through melt spinning, and after double knitting and hot pressing and shaping, obtain a fiber reinforcement layer;

[0018] Step S3: Mix the raw materials of the functional protection layer evenly to obtain a mixed material, disperse the mixed material evenly in an organic solvent, and then evenly coat it on the outer surface of the fiber reinforcement layer. After drying, obtain the functional protection layer;

[0019] Step S4: After subjecting the prepared base layer, reinforcement layer, and protection layer to plasma treatment, then composite them together through a hot pressing composite process to obtain the high-performance composite geotextile.

[0020] Preferably, the polyester chip is a bright polyester chip BRN-204, with an intrinsic viscosity of 0.675 dL / g and an end carboxyl group content of 26 mol / t, provided by Sinopec.

[0021] Preferably, in step S1, the temperature of the melt spinning is 260 - 300 °C, and the spinning speed is 1000 - 2000 m / min.

[0022] Preferably, in step S2, the spinning temperature of the melt spinning is 240 - 260 °C.

[0023] Preferably, in step S2, the pressure of the hot pressing and shaping is 5 - 8 MPa, and the time is 3 - 5 min.

[0024] Preferably, in step S2, the mass ratio of the polyacrylonitrile-based carbon fiber to the coupling agent is 100:(3 - 5).

[0025] Preferably, the coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570.

[0026] Preferably, in step S3, the mass ratio of the mixed material to the organic solvent is 1:(1 - 2).

[0027] Preferably, the organic solvent in step S3 is ethyl acetate.

[0028] Preferably, in step S4, the temperature of the hot pressing is 180 - 200 °C, and the pressure is 9 - 13 MPa.

[0029] Preferably, in step S4, the power of the plasma treatment is 100 - 130 W, and the time is 5 - 8 min.

[0030] The beneficial effects produced by adopting the above technical solutions are as follows:

[0031] (1) The preparation method of the high-performance composite geotextile provided by the present invention has a simple process, convenient operation and control, high preparation efficiency and finished product qualification rate, low dependence on equipment, is suitable for large-scale industrial production, and has high popularization and application value.

[0032] (2) The high-performance composite geotextile provided by the present invention sequentially includes a functional protection layer, a fiber reinforcement layer, and a base layer from top to bottom; the functional protection layer is made of the following raw materials by weight: 5-8 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 6-10 parts of 1-allyl-3-vinylimidazolium chloride, 1-3 parts of 2,4,6-trivinylcyclotriboroxane, 1-3 parts of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 2-4 parts of vinyltrimethoxysilane, and 0.1-0.3 parts of initiator. Through the reasonable selection of the structures of each layer and the formulation of raw materials, the made geotextile has sufficient mechanical properties, good antibacterial and anti-aging properties, and excellent durability; the structures of benzotriazole, imidazolium salt, cyclotriboroxane, and fluorinated quinoxalinone are simultaneously introduced into the functional protection layer. Under the multiple effects of electronic effect, steric effect, and conjugation effect, etc., the made product has good antibacterial property, sufficient anti-aging property, and excellent mechanical properties.

[0033] (3) The high-performance composite geotextile provided by the present invention has high stability of the made product through the reasonable selection of the preparation process and its parameters, and it is not easy to have delamination; through plasma treatment and hot pressing, the interfacial peel strength can be effectively improved, further improving the structural stability of the geotextile, and thus extending its service life. Detailed implementation manners

[0034] In order to enable those skilled in the art to better understand the technical solutions of the present invention, and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below in conjunction with embodiments. The embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0035] Example 1

[0036] A high-performance composite geotextile sequentially includes a functional protection layer, a fiber reinforcement layer, and a base layer from top to bottom; the functional protection layer is made of the following raw materials by weight: 5 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 6 parts of 1-allyl-3-vinylimidazolium chloride, 1 part of 2,4,6-trivinylcyclotriboroxane, 1 part of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 2 parts of vinyltrimethoxysilane, and 0.1 part of initiator; the thickness ratio of the functional protection layer, the fiber reinforcement layer, and the base layer is 0.5:1.2:1.

[0037] The initiator is azobisisobutyronitrile; the fiber-reinforced layer is made by blending polyacrylonitrile-based carbon fiber and polypropylene resin in a mass ratio of 2:7; the grade of the polypropylene resin is H30S; the average diameter of the polypropylene-based carbon fiber is 3 μm, and the aspect ratio is 20:1; the base layer is a polyester fiber non-woven fabric layer.

[0038] A method for preparing the high-performance composite geotextile includes the following steps:

[0039] Step S1: Polyester chips are made into polyester fibers through a melt spinning process, and then the polyester fibers are made into a polyester fiber non-woven fabric base layer by a needling method, controlling the unit area mass of the base layer to be 200 g / m 2 ;

[0040] Step S2: After uniformly mixing polyacrylonitrile-based carbon fiber, polypropylene, and a coupling agent, a mixed material is obtained. After melt spinning, a mixed yarn is made. After double knitting and hot pressing for shaping, a fiber-reinforced layer is obtained;

[0041] Step S3: After uniformly mixing the raw materials of the functional protective layer, a mixed material is obtained. The mixed material is uniformly dispersed in an organic solvent, and then uniformly coated on the outer surface of the fiber-reinforced layer. After drying, a functional protective layer is obtained;

[0042] Step S4: After subjecting the prepared base layer, reinforcing layer, and protective layer to plasma treatment, they are compounded together through a hot pressing composite process to obtain a high-performance composite geotextile.

[0043] The polyester chips are bright polyester chips BRN-204, with an intrinsic viscosity of 0.675 dL / g and an end carboxyl group content of 26 mol / t, provided by Sinopec; the temperature of the melt spinning in Step S1 is 260 °C, and the spinning speed is 1000 m / min; the spinning temperature of the melt spinning in Step S2 is 240 °C; the pressure of the hot pressing for shaping in Step S2 is 5 MPa, and the time is 3 min; the mass ratio of the polyacrylonitrile-based carbon fiber to the coupling agent in Step S2 is 100:3; the coupling agent is a silane coupling agent KH550; the mass ratio of the mixed material to the organic solvent in Step S3 is 1:1; the organic solvent in Step S3 is ethyl acetate; the temperature of the hot pressing in Step S4 is 180 °C, and the pressure is 9 MPa; the power of the plasma treatment in Step S4 is 100 W, and the time is 5 min.

[0044] Example 2

[0045] A high-performance composite geotextile, which sequentially includes a functional protection layer, a fiber reinforcement layer, and a base layer from top to bottom; the functional protection layer is made of the following raw materials by weight: 6 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 7 parts of 1-allyl-3-vinylimidazolium chloride, 1.5 parts of 2,4,6-trivinylcyclotriboroxane, 1.5 parts of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 2.5 parts of vinyltrimethoxysilane, and 0.15 part of initiator.

[0046] The thickness ratio of the functional protection layer, the fiber reinforcement layer, and the base layer is 0.6:1.3:1; the initiator is azobisisobutyronitrile; the fiber reinforcement layer is made by blending polyacrylonitrile-based carbon fiber and polypropylene resin in a mass ratio of 2.3:7.2; the grade of the polypropylene resin is H30S; the average diameter of the polypropylene-based carbon fiber is 4 μm, and the aspect ratio is 23:1; the base layer is a polyester fiber non-woven fabric layer.

[0047] A preparation method of the high-performance composite geotextile includes the following steps:

[0048] Step S1: Polyester chips are made into polyester fibers through a melt spinning process, and then the polyester fibers are made into a polyester fiber non-woven fabric base layer by a needle punching method, and the unit area mass of the base layer is controlled to be 230 g / m 2 ;

[0049] Step S2: Polyacrylonitrile-based carbon fiber, polypropylene, and a coupling agent are mixed evenly to obtain a mixed material, which is made into a mixed yarn after melt spinning, and after double knitting and hot pressing and shaping, a fiber reinforcement layer is obtained;

[0050] Step S3: The raw materials of the functional protection layer are mixed evenly to obtain a mixed material, the mixed material is evenly dispersed in an organic solvent, and then evenly coated on the outer surface of the fiber reinforcement layer, and after drying, a functional protection layer is obtained;

[0051] Step S4: The prepared base layer, reinforcement layer, and protection layer are subjected to plasma treatment and then compounded together through a hot pressing composite process to obtain a high-performance composite geotextile.

[0052] The polyester chip is a bright polyester chip BRN-204, with an intrinsic viscosity of 0.675 dL / g and an end carboxyl group content of 26 mol / t, provided by Sinopec; the temperature of the melt spinning in step S1 is 270 °C, and the spinning speed is 1300 m / min; the spinning temperature of the melt spinning in step S2 is 245 °C; the pressure of the hot pressing and shaping in step S2 is 6 MPa, and the time is 3.5 min; the mass ratio of the polyacrylonitrile-based carbon fiber to the coupling agent in step S2 is 100:3.5; the coupling agent is a silane coupling agent KH560; the mass ratio of the mixed material to the organic solvent in step S3 is 1:1.3; the organic solvent in step S3 is ethyl acetate; the temperature of the hot pressing in step S4 is 185 °C, and the pressure is 10 MPa; the power of the plasma treatment in step S4 is 110 W, and the time is 6 min.

[0053] Example 3

[0054] A high-performance composite geotextile, which sequentially includes a functional protection layer, a fiber reinforcement layer, and a base layer from top to bottom; the functional protection layer is made of the following raw materials by weight: 6.5 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 8 parts of 1-allyl-3-vinylimidazolium chloride, 2 parts of 2,4,6-trivinylcyclotriboroxane, 2 parts of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 3 parts of vinyltrimethoxysilane, and 0.2 part of initiator.

[0055] The thickness ratio of the functional protection layer, the fiber reinforcement layer, and the base layer is 0.65:1.35:1; the initiator is azobisisobutyronitrile; the fiber reinforcement layer is made by blending polyacrylonitrile-based carbon fiber and polypropylene resin in a mass ratio of 2.5:7.5; the grade of the polypropylene resin is H30S; the average diameter of the polypropylene-based carbon fiber is 5 μm, and the aspect ratio is 25:1; the base layer is a polyester fiber non-woven fabric layer.

[0056] A preparation method of the high-performance composite geotextile includes the following steps:

[0057] Step S1: The polyester chip is made into polyester fiber through a melt spinning process, and then the polyester fiber is made into a polyester fiber non-woven fabric base layer by the needling method, and the unit area mass of the base layer is controlled to be 250 g / m 2 ;

[0058] Step S2: The polyacrylonitrile-based carbon fiber, polypropylene, and coupling agent are mixed evenly to obtain a mixed material, which is made into a mixed spun yarn after melt spinning, and after double-sided weaving and hot pressing and shaping, a fiber reinforcement layer is obtained;

[0059] Step S3: After uniformly mixing the raw materials of the functional protective layer to obtain a mixed material, the mixed material is uniformly dispersed in an organic solvent and then uniformly coated on the outer surface of the fiber reinforcement layer. After drying, the functional protective layer is obtained;

[0060] Step S4: After subjecting the prepared base layer, reinforcement layer, and protective layer to plasma treatment, they are then compounded together through a hot pressing and compounding process to obtain a high-performance composite geotextile.

[0061] The polyester chips are bright polyester chips BRN-204, with an intrinsic viscosity of 0.675 dL / g and an end carboxyl group content of 26 mol / t, provided by Sinopec; the temperature of the melt spinning in Step S1 is 280 °C, and the spinning speed is 1500 m / min; the spinning temperature of the melt spinning in Step S2 is 250 °C; the pressure of the hot pressing and shaping in Step S2 is 6.5 MPa, and the time is 4 min; the mass ratio of the polyacrylonitrile-based carbon fiber to the coupling agent in Step S2 is 100:4; the coupling agent is silane coupling agent KH570; the mass ratio of the mixed material to the organic solvent in Step S3 is 1:1.5; the organic solvent in Step S3 is ethyl acetate; the temperature of the hot pressing in Step S4 is 190 °C, and the pressure is 11 MPa; the power of the plasma treatment in Step S4 is 115 W, and the time is 6.5 min.

[0062] Example 4

[0063] A high-performance composite geotextile, which sequentially includes a functional protective layer, a fiber reinforcement layer, and a base layer from top to bottom; the functional protective layer is made of the following raw materials by weight: 7.5 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 9.5 parts of 1-allyl-3-vinylimidazolium chloride, 2.5 parts of 2,4,6-trivinylcyclotriboroxane, 2.5 parts of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 3.5 parts of vinyltrimethoxysilane, and 0.25 part of initiator.

[0064] The thickness ratio of the functional protective layer, fiber reinforcement layer, and base layer is 0.75:1.4:1; the initiator is azobisisobutyronitrile; the fiber reinforcement layer is spun from polyacrylonitrile-based carbon fiber and polypropylene resin in a mass ratio of 2.8:7.8; the grade of the polypropylene resin is H30S; the average diameter of the polypropylene-based carbon fiber is 6 μm, and the aspect ratio is 28:1; the base layer is a polyester fiber non-woven fabric layer.

[0065] A preparation method of the high-performance composite geotextile includes the following steps:

[0066] Step S1: Polyester chips are made into polyester fibers through a melt spinning process, and then the polyester fibers are made into a polyester fiber non-woven fabric base by the needle punching method, controlling the unit area mass of the base to be 290 g / m 2 ;

[0067] Step S2: Polyacrylonitrile-based carbon fibers, polypropylene, and a coupling agent are mixed evenly to obtain a mixed material, which is made into a mixed yarn after melt spinning, and then heat-pressed and shaped after double-sided braiding to obtain a fiber-reinforced layer;

[0068] Step S3: Each raw material of the functional protective layer is mixed evenly to obtain a mixed material, the mixed material is evenly dispersed in an organic solvent, and then evenly coated on the outer surface of the fiber-reinforced layer, and after drying, a functional protective layer is obtained;

[0069] Step S4: The prepared base layer, reinforcement layer, and protective layer are subjected to plasma treatment and then compounded together by a hot pressing and compounding process to obtain a high-performance composite geotextile.

[0070] The polyester chips are bright polyester chips BRN-204, with an intrinsic viscosity of 0.675 dL / g and an end carboxyl group content of 26 mol / t, provided by Sinopec; the temperature of the melt spinning in Step S1 is 295 °C, and the spinning speed is 1900 m / min; the spinning temperature of the melt spinning in Step S2 is 255 °C; the pressure of the hot pressing and shaping in Step S2 is 7.5 MPa, and the time is 4.5 min; the mass ratio of the polyacrylonitrile-based carbon fiber to the coupling agent in Step S2 is 100:4.5; the coupling agent is a mixture of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570 in a mass ratio of 1:2:3; the mass ratio of the mixed material to the organic solvent in Step S3 is 1:1.8; the organic solvent in Step S3 is ethyl acetate; the temperature of the hot pressing in Step S4 is 195 °C, and the pressure is 12 MPa; the power of the plasma treatment in Step S4 is 125 W, and the time is 7.5 min.

[0071] Example 5

[0072] A high-performance composite geotextile includes a functional protective layer, a fiber-reinforced layer, and a base layer from top to bottom in sequence; the functional protective layer is made of the following raw materials by weight: 8 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 10 parts of 1-allyl-3-vinylimidazolium chloride, 3 parts of 2,4,6-trivinylcyclotriboroxane, 3 parts of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 4 parts of vinyltrimethoxysilane, and 0.3 part of an initiator.

[0073] The thickness ratio of the functional protective layer, the fiber-reinforced layer and the base layer is 0.8:1.5:1; the initiator is azobisisobutyronitrile; the fiber-reinforced layer is made of polyacrylonitrile-based carbon fiber and polypropylene resin by blending at a mass ratio of 3:8; the grade of the polypropylene resin is H30S; the average diameter of the polypropylene-based carbon fiber is 7 μm, and the aspect ratio is 30:1; the base layer is a polyester fiber non-woven fabric layer.

[0074] A preparation method of the high-performance composite geotextile includes the following steps:

[0075] Step S1: Polyester chips are made into polyester fibers through a melt spinning process, and then the polyester fibers are made into a polyester fiber non-woven fabric base layer by a needling method, and the unit area mass of the base layer is controlled to be 300 g / m 2 ;

[0076] Step S2: After uniformly mixing polyacrylonitrile-based carbon fiber, polypropylene and a coupling agent, a mixed material is obtained, which is made into a mixed yarn after melt spinning, and after double knitting and hot pressing and shaping, a fiber-reinforced layer is obtained;

[0077] Step S3: After uniformly mixing the raw materials of the functional protective layer, a mixed material is obtained, and the mixed material is uniformly dispersed in an organic solvent, and then uniformly coated on the outer surface of the fiber-reinforced layer, and after drying, a functional protective layer is obtained;

[0078] Step S4: After the prepared base layer, reinforced layer and protective layer are subjected to plasma treatment, they are compounded together through a hot pressing composite process to obtain a high-performance composite geotextile.

[0079] The polyester chips are bright polyester chips BRN-204, with an intrinsic viscosity of 0.675 dL / g and an end carboxyl group content of 26 mol / t, provided by Sinopec; the temperature of the melt spinning in Step S1 is 300 °C, and the spinning speed is 2000 m / min; the spinning temperature of the melt spinning in Step S2 is 260 °C; the pressure of the hot pressing and shaping in Step S2 is 8 MPa, and the time is 5 min; the mass ratio of the polyacrylonitrile-based carbon fiber to the coupling agent in Step S2 is 100:5; the coupling agent is a silane coupling agent KH550; the mass ratio of the mixed material to the organic solvent in Step S3 is 1:2; the organic solvent in Step S3 is ethyl acetate; the temperature of the hot pressing in Step S4 is 200 °C, and the pressure is 13 MPa; the power of the plasma treatment in Step S4 is 130 W, and the time is 8 min.

[0080] Comparative Example 1

[0081] A high-performance composite geotextile, which is basically the same as that of Example 1, except that 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate is used in an equal amount to replace 2,4,6-trivinylcyclotriboroxane.

[0082] Comparative Example 2

[0083] A high-performance composite geotextile, which is basically the same as that of Example 1, except that 1-allyl-3-vinylimidazolium chloride is used in an equal amount to replace 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone.

[0084] The high-performance composite geotextiles prepared in Examples 1-5 and Comparative Examples 1-2 were respectively subjected to relevant performance tests. The test results are shown in Table 1. The test methods are as follows: The CBR bursting strength / KN was measured according to the standard of GB / T 14800-1993; The antibacterial property against Staphylococcus aureus was tested according to GB / T20944. The aging resistance was to place the products of each example in an artificial accelerated aging box at 85 °C for artificial accelerated aging for 85 h, and then measure the CBR bursting strength again after cooling to room temperature, and calculate the retention rate of the bursting strength. The larger the value, the better the aging resistance performance.

[0085] As can be seen from Table 1, compared with the comparative examples, the high-performance composite geotextiles disclosed in the examples of the present invention have higher bursting strength, better antibacterial property and aging resistance; The combined use of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 2,4,6-trivinylcyclotriboroxane, and 1-allyl-3-vinylimidazolium chloride to replace 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone is beneficial to improving the above performances.

[0086] Table 1 Performance test results of high-performance composite geotextiles

[0087] Test Items Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Bursting Strength (KN) 14.2 14.8 15.2 16.2 16.7 12.5 13.0 Antibacterial Property (%) 99.2 99.5 99.6 99.8 99.9 99.0 99.9 Aging Resistance (%) 99.25 99.47 99.53 99.78 99.94 99.90 98.08

[0088] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-performance composite geotextile, characterized in that, It includes a functional protection layer, a fiber reinforcement layer and a base layer from top to bottom in sequence; the functional protection layer is made of the following raw materials by weight: 5-8 parts of 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methylacrylate, 6-10 parts of 1-allyl-3-vinylimidazolium chloride, 1-3 parts of 2,4,6-trivinylcyclotriboroxane, 1-3 parts of 3-(1,1-difluoro-2-propen-1-yl)-2(1H)-quinoxalinone, 2-4 parts of vinyltrimethoxysilane, and 0.1-0.3 parts of initiator.

2. The high-performance composite geotextile according to claim 1, characterized in that The thickness ratio of the functional protection layer, the fiber reinforcement layer and the base layer is (0.5-0.8):(1.2-1.5):

1.

3. The high-performance composite geotextile according to claim 1, wherein, The initiator is azobisisobutyronitrile; the fiber reinforcement layer is made by blending polyacrylonitrile-based carbon fiber and polypropylene resin in a mass ratio of (2-3):(7-8).

4. The high-performance composite geotextile according to claim 1, wherein, The grade of the polypropylene resin is H30S; the average diameter of the polypropylene-based carbon fiber is 3-7μm, and the aspect ratio is (20-30):

1.

5. The high-performance composite geotextile according to claim 1, characterized in that, The base layer is a polyester fiber non-woven fabric layer.

6. A method for preparing a high-performance composite geotextile according to any one of claims 1-5, characterized in that, It includes the following steps: Step S1: Make polyester chips into polyester fibers through a melt spinning process, and then use the needle punching method to make the polyester fibers into a polyester fiber non-woven fabric base layer, controlling the mass per unit area of the base layer to be 200-300 g / m 2 ; Step S2: Mix polyacrylonitrile-based carbon fiber, polypropylene and a coupling agent evenly to obtain a mixed material, which is made into a mixed yarn after melt spinning, and then hot-pressed and shaped after two-way knitting to obtain a fiber reinforcement layer; Step S3: Mix the raw materials of the functional protection layer evenly to obtain a mixed material, disperse the mixed material evenly in an organic solvent, and then evenly coat it on the outer surface of the fiber reinforcement layer. After drying, a functional protection layer is obtained; Step S4: Plasma-treat the prepared base layer, reinforcement layer and protection layer, and then composite them together through a hot-pressing composite process to obtain a high-performance composite geotextile.

7. The preparation method of the high-performance composite geotextile according to claim 6, characterized in that, The polyester chip is a bright polyester chip BRN-204, with an intrinsic viscosity of 0.675 dL / g and an end carboxyl group content of 26 mol / t, provided by Sinopec.

8. The preparation method of the high-performance composite geotextile according to claim 6, characterized in that, In step S1, the temperature of the melt spinning is 260-300°C, and the spinning speed is 1000-2000 m / min; in step S2, the spinning temperature of the melt spinning is 240-260°C; in step S2, the pressure of the hot-pressing and shaping is 5-8 MPa, and the time is 3-5 min; in step S2, the mass ratio of the polyacrylonitrile-based carbon fiber to the coupling agent is 100:(3-5).

9. The preparation method of the high-performance composite geotextile according to claim 6, characterized in that, The coupling agent is at least one of silane coupling agent KH550, silane coupling agent KH560, and silane coupling agent KH570; in step S3, the mass ratio of the mixed material to the organic solvent is 1:(1-2); in step S3, the organic solvent is ethyl acetate.

10. The preparation method of the high-performance composite geotextile according to claim 6, characterized in that, In step S4, the temperature of the hot pressing is 180-200°C, and the pressure is 9-13 MPa; in step S4, the power of the plasma treatment is 100-130 W, and the time is 5-8 min.