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Anti-seepage coating layer with heavy metal chelating function as well as composition and application thereof

An anti-seepage coating and heavy metal technology, applied in the field of environmental governance, can solve the problems of heavy metal pollution in groundwater, uplift and rupture of anti-seepage membrane, etc., and achieve the effect of increasing mechanical strength, high efficiency and lasting effect, and low cost

Inactive Publication Date: 2017-08-29
CHONGQING UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current anti-seepage membrane is mostly replaced by geomembrane. This kind of membrane adopts high-density polyethylene single-layer or double-layer anti-seepage membrane technology, which is brittle. During construction and use, cracks will occur due to induced stress, especially when groundwater When the supporting force of the membrane is greater than the water pressure on the membrane, the anti-seepage membrane will bulge and rupture and lose the anti-seepage function
To make matters worse, the stabilized heavy metals in the landfill redissolve and migrate into the groundwater during the long-term erosion and scouring process of rainwater, causing serious consequences of heavy metal pollution in the groundwater

Method used

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  • Anti-seepage coating layer with heavy metal chelating function as well as composition and application thereof
  • Anti-seepage coating layer with heavy metal chelating function as well as composition and application thereof
  • Anti-seepage coating layer with heavy metal chelating function as well as composition and application thereof

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Experimental program
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preparation example Construction

[0040] Such as figure 1 As shown, the preparation method of the anti-seepage coating with heavy metal chelating function provided by the embodiments of the present invention comprises the following steps:

[0041] S101: through active siloxane, long-chain alkyl derivatives and polyamine structure compounds, all undergo ring-opening reactions with polyepoxy main chain molecules or epoxy rings of polyepoxy polymers;

[0042] S102: The polyether-modified siloxane chain Rn, long-chain alkyl Rn f and the polyamine structure R m Introduced into the polymer chain, multi-epoxy main chain: polyether modified siloxane chain R n : long chain alkyl R f : polyamine chain R m The ratio is 5-50:1-10:1-10:1-10.

[0043] The present invention also provides an anti-seepage coating composition with a heavy metal chelating function. The above-mentioned anti-seepage layer is used in conjunction with micro-nano particles, vinyl silicone oil, hydrogen-containing silicone oil and a catalyst to for...

Embodiment 1

[0059] The anti-seepage coating with heavy metal chelating function provided by the embodiments of the present invention has the following structural characteristics:

[0060]

[0061] Wherein, x, y, z, g are all integers of 10-500;

[0062] R n is aminosiloxane;

[0063] R f is hexyl hydroxyl alcohol;

[0064] R m is ethylenediamine;

[0065] The preparation method of the anti-seepage coating in the embodiment of the present invention is as follows: double-part A epoxy resin 828, aminosiloxane, hexyl hydroxyl alcohol, and ethylenediamine are stirred and mixed evenly in a molar ratio of 50:10:10:10. It is the anti-seepage layer with heavy metal chelating function.

[0066] The preparation method of the anti-seepage coating composition of the embodiment of the present invention is: anti-seepage coating, vinyl silicone oil, methyl silicone resin, diatomaceous earth, hydrogen-containing silicone oil, reaction inhibitor: chloroplatinic acid, in a molar ratio of 5: 10: 5:...

Embodiment 2

[0070] The anti-seepage coating with heavy metal chelating function provided by the embodiments of the present invention has the following structural features:

[0071]

[0072] Wherein, x, y, z, g are all integers of 10-500;

[0073] R n is hydroxysiloxane;

[0074] R f is dodecyl hydroxy alcohol;

[0075] R m is diethylenetriamine;

[0076] The preparation method of the anti-seepage coating in the embodiment of the present invention is: trimethylolpropane triglycidyl ether, hydroxysiloxane, dodecyl hydroxyl alcohol, diethylenetriamine, and the molar ratio is 5:2:3:1 Mix and stir evenly to obtain the anti-seepage coating composition. .

[0077] The preparation method of the anti-seepage coating composition of the embodiment of the present invention is: the anti-seepage coating, vinyl silicone oil, phenyl silicone resin, sepiolite, hydrogen-containing silicone oil, reaction inhibitor, and castor catalyst are mixed in a molar ratio Mix at 50:30:10:10:5:1:1 and grind ...

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PUM

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Abstract

The invention belongs to the technical field of environment control, and discloses an anti-seepage coating layer with a heavy metal chelating function as well as a composition and application thereof. The anti-seepage coating layer is provided with a plurality of heavy metal bonding sites, and integrates multiple functions, such as heavy metal chelating function, adhering function, hydrophobic function, and film forming function. The composition of the coating layer has the advantages that micro-nano particles and macromolecular film forming matters are wound and chemically bonded together, so as to form a stable hydrophobic anti-seepage macromolecular film; the usage amount is small, the cost is low, and the stabilizing effect of heavy metal is efficient and lasting.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment, and in particular relates to an anti-seepage coating with heavy metal chelating function, its composition and application. Background technique [0002] In hazardous waste landfills, industrial waste dumps and other areas where heavy metals accumulate and have high concentrations of heavy metals, impermeable membranes are particularly important, especially when the groundwater level is higher than the disposal site, and the groundwater seeps and flows into the landfill along the pores. On the one hand, it increases sewage Treatment capacity and operating costs, on the other hand, harmful leachate, especially heavy metal ions redissolved, causing groundwater pollution. Therefore, in places such as hazardous waste landfills and industrial waste dumps, anti-seepage membranes are laid on the bottom, sides and even the top to prevent the penetration of harmful leachate. [0003] The c...

Claims

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Application Information

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IPC IPC(8): C09D183/07C09D183/05C09D183/04C09D163/00C08G59/14C08G59/16
CPCC09D183/04C08G59/1433C08G59/1444C08G59/1455C08G59/1477C08G59/1483C08K2003/2296C08L2205/025C08L2205/035C09D163/00C08L83/04C08L63/00
Inventor 袁浩窦建军陈刚才肖定书叶姜瑜
Owner CHONGQING UNIV
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