Preparation method of high-strength anti-aging anti-clogging reinforced composite geotextile

A composite geotextile, high-strength technology, applied in chemical instruments and methods, soil protection, sea area engineering, etc., can solve problems such as silting, poor anti-ultraviolet aging performance, inelastic self-adaptive deformation ability, etc.

Pending Publication Date: 2021-05-25
MAANSHAN CITY XIN CHENG NANO NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polypropylene filament needle-punched filter geotextile exposes many shortcomings at the same time. One of the polypropylene filaments has no elasticity and self-adaptive deformation ability, and it is difficult to adapt to the small deformation in the project. Long-term use is prone to blockage, cracking and other adverse phenomena , the anti-ultraviolet aging performance of its two polypropylene materials is poor, which limits its application environment

Method used

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  • Preparation method of high-strength anti-aging anti-clogging reinforced composite geotextile
  • Preparation method of high-strength anti-aging anti-clogging reinforced composite geotextile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Modified calcium sulfate whiskers are made by the following steps:

[0035] Add 5g of titanate coupling agent into a three-necked flask and add 25mL of acetone to dilute, then add 10g of calcium sulfate whiskers into the flask, heat to 70°C, condense, reflux, and magnetically stir for 7 hours. After the reaction, the product is After suction filtration, the filter cake after suction filtration was washed twice with 30 mL of ethanol solution, and then the product was placed in a vacuum drying oven and dried at 50° C. for 14 hours to obtain modified calcium sulfate whiskers.

Embodiment 2

[0037] Nano-TiO 2 Made by following steps:

[0038] Step C1, add 1.25mmol of titanium tetrachloride into the autoclave, add 20.3mmol of 3,5-dimethylpiperidine, 6.5mg of KH-570 and 60mmol of deionized water and stir and mix for 0.5 hours, then put the reaction kettle on the temperature setting Heated in an oven set at 170°C for 4 days, then took out the reactor and cooled it to room temperature naturally to obtain the product;

[0039] Step C2, the product is separated by centrifugation for 20 minutes, the precipitate is dispersed in 20ml of absolute ethanol and ultrasonically oscillated for 10-20 minutes, then placed in a vacuum drying oven and dried at 60-70°C for 5-6 hours to obtain Nano-TiO 2 .

Embodiment 3

[0041] Modified polyvinylidene fluoride is made by the following steps:

[0042] Step D1, take 3g of polyvinylidene fluoride in a flask, add 20mL of N-methylpyrrolidone, stir and mix, add 2mL of tetraethylammonium hydroxide solution in a nitrogen atmosphere, heat for 30 minutes, then raise the temperature to 110°C, and keep it warm for 10 minutes , to obtain polyvinylidene fluoride solution;

[0043] In step D2, add 2 g of acrylic acid and 10 mg of benzoyl peroxide to 15 mL of N-methylpyrrolidone successively, stir and mix, add 8 mL of the polyvinylidene fluoride solution prepared in step D1 to the mixture, and control the reaction temperature to 70 ° C for 30 Minutes, after the reaction is over, wash the product with deionized water for 3 times, then extract it with absolute ethanol for 24 hours to remove unreacted acrylic acid, after extraction, put it in a vacuum oven at 75°C and dry it for 10 hours to obtain Modified polyvinylidene fluoride.

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Abstract

The invention discloses a preparation method of a high-strength anti-aging anti-clogging reinforced composite geotextile, which comprises the following steps of by taking a polypropylene synthetic fiber and glass fiber mixed needling non-woven fabric and a polyester woven fabric as base materials, uniformly coating a modified polyvinylidene fluoride emulsion on the non-woven fabric through a padding method to form a micron-scale microporous film. Fine gravel waste residue particles are effectively intercepted and prevented from leaking out, meanwhile, the water filtering flux of the composite geotextile is improved, and clogging of the composite geotextile is prevented, graphene oxide is added in the polyvinylidene fluoride emulsion synthesis process, hydrophilic modification of graphene oxide on the emulsion is remarkable, the water filtering flux is also greatly improved, a large number of oxygen-containing groups also reduce the film resistance of film formation of the emulsion, pollutants are not easy to deposit on the surface of the film and in film holes, improvement of the anti-pollution performance of the film, maintenance of stable permeability and reduction of clogging are facilitated, and meanwhile, an ultraviolet screening agent nano TiO2 is added, so that the composite geotechnical cloth is endowed with an excellent anti-aging function.

Description

technical field [0001] The invention belongs to the technical field of geotextile preparation, and relates to a method for preparing a high-strength, anti-aging, anti-silting, and reinforced composite geotextile. Background technique [0002] Geotextiles are often used as filter materials in engineering facilities such as earth dams, dikes, relief wells, tailings ponds, roadbeds, and underground anti-floating structures to filter water and protect soil. Reverse filtration, also known as filtration, percolation or inverted filtration, refers to engineering to keep the soil particles under the action of osmotic pressure from losing while allowing liquid to pass through. There are generally two requirements for the selection of filter materials: one is to protect the soil, that is, it is required that the particles in the protected soil must not pass through the filter layer, otherwise it will cause a large amount of soil particles to lose and cause piping; the other is to Per...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/32B32B27/12B32B27/36B32B37/06B32B37/10D06M11/46D06M11/74D06M15/263D06M15/256D01F6/46D01F1/10C08F259/08C08F220/06E02D3/00E02B3/12D06M101/20
CPCB32B5/022B32B5/024B32B5/26B32B37/06B32B37/10D06M11/46D06M11/74D06M15/263D06M15/256D01F6/46D01F1/10C08F259/08E02D3/005E02B3/122B32B2260/021B32B2260/046B32B2262/0253B32B2262/14B32B2262/101B32B2262/0276B32B2307/71D06M2101/20C08F220/06Y02P20/141
Inventor 程晓林
Owner MAANSHAN CITY XIN CHENG NANO NEW MATERIAL TECH CO LTD
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