KR102218731B1 - Selective adsorption reactive smart liner with multi-layered structure - Google Patents

Abstract

The present invention relates to a reactive smart cutoff material for selective adsorption with a multi-layer structure, and more specifically, to a reactive smart cutoff material for selective adsorption with a multi-layer structure, which is preemptively installed at an area at which oil leakage is anticipated so as not to react to normal groundwater, rainwater and leachate, while immediately responding after coming in contact with organic contaminants (oil) when oil leakage occurs to selectively adsorb the contaminants to swell in order to provide a cutoff function. To this end, the reactive smart cutoff material for selective adsorption of underground organic contaminants of the present invention is characterized by comprising: a fiber cover layer provided at upper and lower sides; a self-swelling oil absorbent means filled between the fiber cover layers; a movement prevention member of a sheet shape or a film shape to divide the self-swelling oil absorbent means filled between the fiber cover layers installed to maintain a limited interval in a transverse direction; and a fixating member fastening the fiber cover layers provided at the upper and lower sides.

Description

Selective adsorption reactive smart liner with multi-layered structure

The present invention relates to a selective adsorption-reactive smart car watering material having a multi-layered structure, and in more detail, it is pre-installed in an area where oil leakage is expected and does not react to general groundwater, rainwater, and leachate. The present invention relates to a selective adsorption-reactive smart waterproofing material having a multi-layered structure in which a reaction occurs immediately upon contact with a pollutant source (diameter) and selectively adsorbs and swells the pollutant to express the order performance.

In recent years, contaminated sites that are difficult to resolve with the current purification technology continue to occur, and the government is preparing a new pollution management system based on the risk, and accordingly, it is necessary to develop technologies necessary for policy promotion.

When organic pollutants and inorganic pollutants are leaked, they are introduced into the groundwater by the movement and diffusion of pollutants, and the introduced pollutants cause environmental pollution in the surrounding environment. Pollution problems arise.

For such sites, it is necessary to actively develop and utilize risk-based risk blocking technologies (pollution prevention, diffusion prevention, etc.) and precautionary technologies in addition to purification technologies.

In Korea, the institutional foundation was laid with the 『Enactment and Revision of the Soil Environment Conservation Act』 in 1995, and after that, the government started to develop technologies to block the movement and spread of pollutants.However, compared to advanced countries, the domestic technology is still insufficient. There is a situation. In addition, since most of the research is at the level of simply introducing and then applying the developed technologies of advanced countries, it is necessary to develop technologies suitable for the domestic environment.

Techniques for blocking the movement and diffusion of pollutants include blocking the movement and diffusion of pollutants using a barrier material, solidification/stabilization, plant purification, and water-permeable reaction walls, among which the method using a barrier material is commonly applied. In the method of blocking the movement and diffusion of pollutants using water, it is practically difficult to respond quickly to a wide range of polluted areas if the organic pollutant is not recognized at the initial stage of the outflow and diffusion, so an emergency disaster prevention system is required.

As a general barrier material, bentonite is filled between the upper and lower fiber covers so that when water penetrates, bentonite absorbs water and swells to a certain volume, while bentonite adheres to each other to form watertightness.However, the bentonite mat is unconditionally when water penetrates. Because of absorption and swelling, there is a problem that it is impossible to selectively select and use a pollutant source.

Therefore, in consideration of the above-described problems of the bentonite mat, 17 kinds of organic pollutants were used using the self-swelling type oil-based resin Poly(dodecylacrylate) (PolyDDA) described in the paper on the oil absorption behavior and kinetic analysis of Poly(dodecylacrylate) published in 1999 (Oil) was allowed to adsorb.

The self-swelling oil-based resin was filled between the fiber cover layers as shown in Fig. 1(a) of the attached drawing, and then the organic contaminant was adsorbed. As shown in Fig. 1(b) of the attached drawing, the organic contaminant was simultaneously adsorbed. The reaction is gelled to form an impermeable layer, but there is a problem in that the surface of the fiber cover layer is deformed due to a swelling phenomenon that increases the volume.

In addition, before swelling, it is filled in a powder form, so if it is not distributed evenly, there is a problem that one side swells rapidly and excessively as shown in Fig. 1(b) of the accompanying drawings, and due to the swelling of the self-swelling type oily resin, There is a problem in that the fiber cover layer is separated by an open gap, and there is a problem that the tensile force is lowered by forming a physical force only with the fiber cover layer.

1. Korean Registered Patent Publication No. 10-0948348 2. Korean Registered Patent Publication No. 10-0399559 3. Korean Patent Publication No. 10-2004-0061767

1. A paper on oil absorption behavior and kinetic analysis of Poly(dodecylacrylate) published in 1999

The present invention, conceived to solve the conventional problems as described above, is a self-swelling type having a characteristic of swelling and gelling by selectively adsorbing the pollutant when contacting the organic pollutant inside by dividing the limited interval of the fiber cover layer into a plurality of transverse directions. A selective adsorption reaction type smart with a multi-layered structure with improved water-repellent performance and preventing deformation by preventing the self-swelling type oil absorbing means from moving and improving the tensile force after swelling by filling and forming the oil absorbing means in a multi-layout (multi-layer) structure. Its purpose is to provide the interior material.

It is an object of the present invention to provide a selective adsorption-reactive smart waterproofing material having a multi-layered structure with improved water-repelling performance and deformation prevention, which prevents deformation even if swelling occurs by binding the above fiber cover layers to maintain a limited spacing. .

An object of the present invention as described above is a selective adsorption reaction type smart water shielding material for organic pollutants in the ground, comprising: a fiber cover layer provided above and below; It is filled between the fiber cover layers and has two or more polymerizable unsaturated groups in a polymer resin such as polyacrylate copolymer, polynorbornene-based copolymer, crosslinked polydecene-divinylbenzene copolymer, and crosslinked polyolefin copolymer. A self-swelling oil absorbing means processed to have a swelling property in the range of 10 to 40 (g/g) with respect to organic pollutants by copolymerizing a crosslinkable monomer; A movement preventing member in the form of a sheet or film which divides and forms a self-swelling oil absorbing means filled between the fiber cover layers provided to maintain a limited spacing in a transverse direction; It is achieved by a selective adsorption reaction type smart barrier material having a multi-layered structure, characterized in that it comprises a fixing member for binding the fiber cover layers provided on the upper and lower sides.

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Here, the self-swelling oil absorbing means is characterized by adding and mixing one or more granules selected from the group consisting of clay, silica, olipine powder and organo bentonite or zeolites. do.
Wherein the smart material is installed as a pre-existing degree enemy in a hazardous area Organic normal groundwater leakage in the 10 ^-2 cm / s showed the water permeability of the order of performance when the organic contaminated groundwater in contact with less than 10 ^-6 cm / s within 24 hours It is characterized by expressing.

The present invention is a multi-layout of self-swelling oil absorbing means having a characteristic of swelling and gelling by selectively adsorbing the contaminant when contacting the organic contaminant inside by dividing the limited spacing of the fiber cover layer into a plurality in the transverse direction. ) By filling and forming a structure, the self-swelling oil absorbing means is prevented from moving and the tensile strength is improved after swelling, and it is modified even if swelling occurs by binding the fiber cover layer to maintain a limited gap. It is a very useful invention that has an effect such as to prevent.

1 is a photograph showing a structure when a self-swelling oil absorbing means is filled between fiber cover layers and a behavior concept when an organic pollutant source is adsorbed to the self-swelling oil absorbing means.
Figure 2 is a cross-sectional view showing the structure of a selective adsorption reaction type smart car watering material in the ground to which the technology of the present invention is applied.
3 to 4 are cross-sectional views showing another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is manufactured by comprising an impermeable layer having a characteristic of swelling and gelling by selectively adsorbing a pollutant from contaminated groundwater, and fixing the thickness direction with a fiber cover layer at the top and bottom. Organic pollutants such as crude oil and benzene , Toluene, TCE, TPH, etc. by selectively reacting to adsorb-swelling and gelling contaminants and improving airtightness due to the structure made up and down, and exhibits water-repelling performance, and has a water permeability conversion characteristic by selective adsorption-gelling behavior. Its purpose is to provide a selective adsorption reaction-type smart waterproofing material.

1 is a cross-sectional view showing the structure of a selective adsorption reaction type smart waterproofing material for organic pollutants in underground contaminated water to which the technology of the present invention is applied. The fiber cover layers 10 and 20 are installed at intervals.

Here, the fiber cover layers 10 and 20 may be composed of polypropylene and polyester, and a woven fabric that satisfies the mechanical properties sufficient to secure water permeability of 10 ^-2 cm/s or more and morphological stability of the waterproofing material or It is preferable to use a nonwoven fabric.

Meanwhile, between the fiber cover layers 10 and 20, a self-swelling oil absorbing means 30 having a characteristic of swelling and gelling by selectively adsorbing the pollutant when in contact with the organic pollutant is filled.

Here, the self-swelling oil-absorbing means 30 having self-swelling self-swelling is a polyacrylate-based, polynorbornene-based, crosslinked polydecene-divinylbenzene-based, or polyolefin-based polymer resin. It is characterized in that it is a polymer synthetic resin obtained by copolymerizing a crosslinkable monomer having two or more polymerizable unsaturated groups as a main component.

Here, the self-swelling oil absorbing means 30 is selected from the group consisting of clay, silica, olipine powder and organo bentonite or zeolites, as shown in FIG. It is characterized in that any one or more granules 40 are added and blended.

Meanwhile, the self-swelling oil absorbing means 30 filled in the space limited by the upper and lower fiber cover layers 10 and 20, that is, the volume, is divided into multiple layers as shown in the accompanying drawings in the transverse direction. Thus, the movement preventing member 50 in the form of a sheet or film formed in a multi-layout (multi-layer) structure is installed. The purpose of installation of the movement preventing member 50 is to control the swelling space, thereby preventing airtightness and deformation due to swelling.

The binding of the fiber cover layers 10 and 20 and the movement preventing member 50 provided at the top and bottom is made by a fixed connection member 60, and the movement preventing member 50 is a nonwoven fabric, forming voids at regular intervals. Any one of a sheet and a mesh network may be used, and the fixed connection member 60 is bound by any one of needle punching, stitching, and sewing.

At this time, as shown in the accompanying drawings, 1 to 3 motion prevention members 50 for dividing the layers of the self-swelling oil absorbing means 30 are installed and used, and preferably 2 are installed at regular intervals. Good to use.

The reason is that if three or more movement preventing members 50 are installed at regular intervals, the filling operation of the self-swelling oil absorbing means 30 is difficult and the manufacturing time of the product is excessively required. In addition, the thickness of the movement preventing member 50 is formed to be thinner than the fiber cover layers 10 and 20, and specifically, the thickness of the wet tissue is preferable.

At this time, an example of the composition ratio of each component of the mixture including the self-swelling oil absorbing means 30 is as follows.

Example of mixing ratio of oil-adsorbing swellable resin and filler Oil adsorption swellable resin A Oil adsorption swellable resin B Olefin-based synthetic resin powder Organo bentonite Zeolite Other Mixture A-1002 26 - 64 - 3 7 Mixture A-0143 - 35 65 - 3 7 Mixture B-1012 10 25 65 - 4 6 Mixture C-2150 16 - 24 50 3 7 Mixture D-1122 23 12 56 - 2 2 Mixture E-101 18 - 80 - 2 -

According to the present invention, the fiber cover layers 10 and 20 may be composed of polypropylene or non-woven fabrics, and satisfy mechanical properties sufficient to secure water permeability of 10 ^-2 cm/s or more and morphological stability of the waterproofing material. It is preferable to use a woven or nonwoven fabric.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. However, the following examples are examples for explaining the present invention and are not intended to limit the present invention, and those of ordinary skill in the art can be modified as much as possible within the scope of the invention disclosed in the claims.

[Example]

1) Preparation of self-swelling oil absorbing means: polyacrylate copolymer, polynorbornene-based copolymer, crosslinked polydecene-divinylbenzene copolymer, crosslinked polyolefin copolymer, etc.

2) Filling material: clay, silica, synthetic resin powder, organo bentonite or zeolites, etc.

3) Fiber cover layer: woven or non-woven fabric made of general-purpose polypropylene (PP), polyester (PET), and composite fabrics thereof, etc.

The prepared fiber cover layers 10 and 20 are used as the outer shell, and the self-swelling oil absorbing means 30 is filled in the center to have a thickness of 5.0 to 25 mm, and fibers as shown in Figs. The cover layer (10) (20) is fixed by a connection member (60) to fix the fiber cover layer (10) (20), and one or two behavior prevention members (50) are attached to the self-swelling type oil absorbing means (30) Was installed, and a specimen was prepared to have a size of width×length×thickness = 100mm×100mm×10mm, and the behavior before and after contact with contaminants was examined.

As a result, there was no significant change before (a) contact with the pollutant, and it was confirmed that the self-swelling type oil absorbing means 30 located in the center swelled after contacting the pollutant, and this swollen self-swelling oil absorbing property It was confirmed that the means 30 filled all empty spaces serving as flow paths present in the mixed composition, and the water permeability was significantly reduced.

When the self-swelling oil absorbing means is swelled, the volume increases, and the volume change that occurs during the volume swelling is suppressed by increasing the density in each section partitioned by the behavior preventing member 50 first, and the volume change is suppressed. Because it catches external changes, the density increases according to swelling and the watertightness efficiency increases.

In addition, the physical properties of the prepared specimens were tested, and each of the three specimens was prepared, and then the self-swelling type oil absorbing means 30 is a single layer, the self-swelling type oil absorbing means 30 is divided into two layers, The self-swelling oil absorbing means 30 was divided into three layers to calculate the average value, and the results are shown in Table 2 below.

Evaluation item
unit Measures
Assessment Methods unit 2nd floor division 3 floor division Permeability coefficient cm/s α×10 ^-6 β×10 ^-7 γ×10 ^-7 KS F 2128 or
KS K ISO 11058 Pitching ability
Conversion characteristics cm/s 10 ^-2 →10 ^-6 10 ^-2 →10 ^-7 10 ^-2 →10 ^-7 KS F 2128 or
KS K ISO 11058

(α, β, γ = 1~9)

As can be seen from the results of Table 2, the smart barrier material of the present invention does not exhibit any order performance under normal groundwater conditions, and reacts with oil adsorption and self-swelling upon contact with organic pollutants, through which the water permeability coefficient is ordered. It can be seen that it is sufficiently lowered to a level that satisfies the performance to form the desired order layer. This change in water permeability makes it possible to immediately respond to the outflow of organic pollutants.

Meanwhile, as shown in the accompanying drawings, the self-swelling oil absorbing means 30 includes any selected from the group consisting of clay, silica, olipine synthetic resin, organo bentonite, or zeolites. One or more granules 40 may be added and blended.

The granules 40 are mixed with the powdered self-swelling oil absorbing means, and the granules only swell when contacting an organic pollutant, but the self-swelling oil absorbing means gels and fills the gap between the granules and the granules. Is expressed.

10, 20: fiber cover layer
30: self-swelling oil absorbing means
40: granules
50: movement preventing member
60: fixed connection member

Claims (5)

In the underground organic pollutant source selective adsorption reaction type smart waterproofing material,
A fiber cover layer provided above and below;
It is filled between the fiber cover layers and has two or more polymerizable unsaturated groups in a polymer resin such as polyacrylate copolymer, polynorbornene-based copolymer, crosslinked polydecene-divinylbenzene copolymer, and crosslinked polyolefin copolymer. A self-swelling oil absorbing means processed to have a swelling property within a range of 10 to 40 (g/g) with respect to organic pollutants by copolymerizing a crosslinkable monomer;
A movement preventing member in the form of a sheet or film which divides and forms a self-swelling oil absorbing means filled between the fiber cover layers provided to maintain a limited spacing in a transverse direction;
Selective adsorption reaction type smart waterproofing material having a multi-layered structure, characterized in that comprising a fixing member for binding the fiber cover layers provided on the upper and lower sides.
delete The method of claim 1,
Multilayer, characterized in that the self-swelling oil absorbing means is mixed with one or more granules selected from the group consisting of clay, silica, olipine powder and organo bentonite or zeolites. Selective adsorption reaction type smart vehicle with structure.
delete The method of claim 1,
The smart barrier material is pre-installed in an area where there is a risk of leakage of organic pollution, so it has a water permeability of 10 ^-2 cm/s in normal groundwater, and when it comes into contact with organic polluted groundwater, it is 10 ^-6 cm/s or less within 24 hours. Selective adsorption reaction-type smart vehicle having a multi-layered structure, characterized in that to express.

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