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

3 Cites 2 Cited by

AI-Extracted 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 tha...

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.

Application Domain

Epoxy resin coatings

Technology Topic

Micro nanoHeavy metal chelation +7

Image

Examples

Experimental program(6)

Example Embodiment

[0040] Such as figure 1 As shown, the method for preparing an impermeable coating with heavy metal chelating function provided by the embodiment of the present invention includes the following steps:

[0041] S101: Through active group siloxane, long-chain alkyl derivatives and polyamine structure compounds, all have a ring-opening reaction with the polyepoxy backbone molecule or the epoxy ring of the polyepoxy polymer;

[0042] S102: The polyether modified siloxane chain Rn and the long-chain alkyl group R f And polyamine structure R m Introduced into the polymer chain, polyepoxy 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 heavy metal chelating function. The anti-seepage layer is combined with micro-nano particles, vinyl silicone oil, hydrogen-containing silicone oil and a catalyst to form an anti-seepage coating composition.

[0044] The preparation method of the impermeable coating composition: the impermeable layer, vinyl silicone oil, silicone resin, adsorption carrier micro-nano filler, hydrogen-containing silicone oil, reaction inhibitor: reaction catalyst are mixed uniformly, and the molar ratio is 5-50 :10~100:5~50:5~50:0.1~10:0.5~5:0.5~5.

[0045] The hydrogen-containing silicone oil includes high hydrogen content and low hydrogen content hydrogen-containing silicone oil, and has the following structural characteristics:

[0046]

[0047] The vinyl silicone oil, including high-viscosity vinyl silicone oil and low-viscosity vinyl silicone oil, has the following structural characteristics:

[0048]

[0049] The adsorption carrier micro-nano filler is at least one of diatomaceous earth, bentonite, sepiolite, vermiculite, short fiber with heavy metal chelating function, zinc oxide, iron oxide, and silica gel.

[0050] The silicone resin is at least one of methyl silicone resin, phenyl silicone resin, phenyl methyl silicone resin, hydrogen-containing MQ silicone resin, methyl MQ type silicone resin, and methyl vinyl type MQ silicone resin.

[0051] The catalyst is one or more of chloroplatinic acid, chloroauric acid, Caster catalyst, and platinum-carbon catalyst.

[0052] The reaction inhibitor may be one of maleates, acetylenic alcohols or divinyls.

[0053] The application of the impermeable coating and composition includes the following steps:

[0054] (1) Base membrane activation: The base membrane is activated by high-energy radiation or immersed in Piranha solution (acidic hydrogen peroxide solution).

[0055] (2) The impermeable coating composition is coated on the surface of the activated base film by a roll coating method, and dried at a temperature of 80-120 DEG C to obtain an impermeable film with heavy metal adsorption function.

[0056] The base film is the current general anti-seepage film, and the inner layer can be PP, PE and HDPE.

Example Embodiment

[0058] Example 1

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

[0060]

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

[0062] R n Is aminosiloxane;

[0063] R f Is a hexyl hydroxy alcohol;

[0064] R m Is ethylenediamine;

[0065] The preparation method of the impermeable coating in the embodiment of the present invention is as follows: double parts of A epoxy resin 828, aminosiloxane, hexyl hydroxy alcohol, and ethylene diamine, with a molar ratio of 50:10:10:10, stirring and mixing uniformly, It is an impermeable layer with heavy metal chelating function.

[0066] The preparation method of the impermeable coating composition of the embodiment of the present invention is as follows: the impermeable coating, vinyl silicone oil, methyl silicone resin, diatomaceous earth, hydrogen-containing silicone oil, reaction inhibitor: chloroplatinic acid, molar ratio 5:10:5:10:0.5:0.5:0.5 are mixed and ground uniformly to obtain an impermeable coating composition.

[0067] The application of the impermeable coating and composition of the embodiment of the present invention:

[0068] The anti-seepage coating and composition obtained in this example are coated on the inner surface of the ordinary anti-seepage membrane layer pretreated by degreasing, decontamination and activation, and dried at 80°C to prepare an anti-seepage membrane with heavy metal chelating function , The film can be used in hazardous waste landfills, slag dumps and other high-risk environments rich in heavy metals.

Example Embodiment

[0069] Example 2

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

[0071]

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

[0073] R n Is a hydroxysiloxane;

[0074] R f Is dodecyl hydroxy alcohol;

[0075] R m Is diethylene triamine;

[0076] The preparation method of the impermeable coating in the embodiment of the present invention is: trimethylolpropane triglycidyl ether, hydroxysiloxane, lauryl hydroxy alcohol, diethylene triamine, and a molar ratio of 5:2:3:1 Mix and stir evenly to obtain the impermeable coating composition. .

[0077] The preparation method of the impermeable coating composition of the embodiment of the present invention is as follows: the impermeable coating, vinyl silicone oil, phenyl silicone resin, sepiolite, hydrogen-containing silicone oil, reaction inhibitor, caster catalyst, and molar ratio Mix the mixture at 50:30:10:10:5:1:1 and grind uniformly to obtain the impermeable coating composition.

[0078] The application of the impermeable coating and composition of the embodiment of the present invention:

[0079] The impermeable coating and composition obtained in this example are coated on the inner surface of the ordinary impermeable membrane layer pretreated by degreasing, decontamination and activation, and dried at 100°C to prepare an impermeable membrane with heavy metal chelating function , The film can be used in hazardous waste landfills, slag dumps and other high-risk environments rich in heavy metals.

PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Classification and recommendation of technical efficacy words

reduce dosage
low cost

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

Similar technology patents

High-hydroscopicity polymer resin microcapsule and its production process

Square covering square hollow sandwiched carbon fiber steel rib-steel pipe concrete combined column

Ginseng and honey composition and preparation method thereof

Double metal cyanide catalyst, preparation method and usage thereof

Preparation method for 107 silicon rubber with controllable viscosity

Classification and recommendation of technical efficacy words

Use of lipid conjugates in the treatment of disease

High-performance recovered PET/ABS alloy

Apparatus and method for preparing aminobenzene by nitrobenzene gas-phase hydrogenation

Reverse osmosis membrane scale inhibitor and preparation and use method thereof

Method for preparing active fly ash phosphorus adsorbent

Method, apparatus and article for microfluidic control via electrowetting, for chemical, biochemical and biological assays and the like

System and method for transmitting wireless digital service signals via power transmission lines

Plastic waveguide-fed horn antenna

System and method for determination of position

Adaptive antenna optimization network