KR20160000154A - A fishing net comprising activity carbon fiber and method of manufacturing the same - Google Patents

Abstract

The present invention relates to an activated carbon fiber netting precursor fabric in which precursor filaments for activated carbon fibers having a yarn strength of 5 to 30 g / d are woven in the form of a mesh are activated at a temperature of 650 to 950 ° C to form filament- Are formed in a mesh shape, and the filament type activated carbon fibers have a yarn strength of 0.1 to 2.0 g / d.
The specific surface area of the filament type activated carbon fiber is 600 to 1,300.
The activated carbon fiber fishing net of the present invention is excellent in durability and is not easily damaged by seawater flow, and fine pores having a diameter of 1 to 2 nm are well developed and excellent in adsorption of fine metals such as cesium.
Therefore, the activated carbon fiber fishing net of the present invention is particularly useful as a marine cage aquaculture net.

Description

FIELD OF THE INVENTION The present invention relates to an activated carbon fiber net,

More particularly, the present invention relates to an activated carbon fiber fishing net having excellent durability and excellent capability of adsorbing fine metal such as cesium without being easily damaged by seawater flow, and a method for producing the same. .

Hereinafter, in the present invention, a fishing net made of activated carbon fibers is referred to as "activated carbon fiber fishing net ".

Fear of ocean radioactive contamination has increased since the Fukushima nuclear accident. Especially, fishery contamination by cesium is managed as a measure of radioactive contamination. In this situation, there is a rapid increase in demand for radioactive pollution prevention net that can effectively adsorb fine metals such as cesium in marine farms.

Activated carbon fiber is useful as a material to prevent radioactive pollution because 90% or more of the total area is composed of micropores having a diameter of 1 to 2 nm suitable for adsorption of fine metals such as cesium.

Cesium and the like, there has been known a method of manufacturing a precursor nonwoven fabric for activated carbon fiber fishing net made of precursor staple fibers for activated carbon fibers, which is subjected to a deterioration treatment, a low temperature carbonization treatment and a high temperature activation To produce an activated carbon fiber net.

However, the activated carbon fiber fishing net produced by the above-mentioned prior art is composed of activated carbon fibers in the form of short fibers, so that the durability thereof is easily deteriorated by the flow of seawater.

An object of the present invention is to provide an activated carbon fiber fishing net which is excellent in durability and is not easily damaged by seawater flow but is excellent in adsorption of fine metals such as cesium and the like and is suitable for preventing radioactive contamination, and a method for producing the same.

The present invention relates to an activated carbon fiber netting precursor fabric in which precursor filaments for activated carbon fibers having a yarn strength of 5 to 30 g / d are woven in the form of a mesh are activated at a temperature of 650 to 950 ° C to form filament- Are formed in a mesh shape, and the filament type activated carbon fibers have a yarn strength of 0.1 to 2.0 g / d.

The activated carbon fiber fishing net of the present invention is excellent in durability and is not easily damaged by seawater flow, and fine pores having a diameter of 1 to 2 nm are well developed and excellent in adsorption of fine metals such as cesium.

Therefore, the activated carbon fiber fishing net of the present invention is particularly useful as a marine cage aquaculture net.

Hereinafter, the present invention will be described in detail.

The activated carbon fiber fishing net according to the present invention has a structure in which the filament type activated carbon fibers are woven in the form of a mesh, and the yarn strength of the filament type activated carbon fiber is 0.1 to 2.0 g / d.

Staple-type activated carbon fibers have a strength of less than 0.1 g / d and are too low to be applicable in the manufacturing process.

The specific surface area of the filament type activated carbon fiber is 600 to 1,300.

In the present invention, a precursor fabric for an activated carbon fiber fishing net, in which precursor filaments for activated carbon fibers having a yarn strength of 5 to 30 g / d are woven in the form of a mesh, is activated at a temperature of 650 to 950 ° C, .

The precursor filament for the activated carbon fiber is a polyacrylonitrile-based filament, a polyvinyl alcohol-based filament, a pitch-based filament, a cellulose-based filament, or a phenol-based filament.

When the activation temperature is lower than 650 ° C., the specific surface area of the activated filament type activated carbon fiber is lowered to less than 600, and the adsorption performance of the fine metal is lowered. When the activation temperature is higher than 950 ° C., The probability of formation of large pores having a diameter of 3 nm or more instead of fine pores is increased, so that the adsorption performance of the fine metal is lowered and the strength is lowered.

When the yarn strength of the activated carbon fiber precursor filament is less than 5 g / d, the strength of the activated filament type activated carbon fiber is less than 0.1 g / d, and the durability against the seawater flow is decreased.

If the yarn strength of the precursor filaments for activated carbon fibers exceeds 30 g / d, the activation process becomes longer and the productivity decreases.

The activated carbon fiber fishing net of the present invention is excellent in durability and is not easily damaged by seawater flow, and fine pores having a diameter of 1 to 2 nm are well developed and excellent in adsorption of fine metals such as cesium.

Therefore, the activated carbon fiber fishing net of the present invention is particularly useful as a marine cage aquaculture net.

Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples.

However, the following embodiments are merely examples of the present invention and do not limit the scope of protection of the present invention.

Example  One

An activated carbon fiber mesh was prepared by activating a precursor fabric for an activated carbon fiber fishing net in which polyacrylonitrile monofilaments (precursor filaments for activated carbon fibers) having a strength of 5 g / d were woven in a mesh form at a temperature of 670 캜 .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 0.55 g / d, and the specific surface area was 1,200.

Example  2

Activated carbon fiber fishing net having activated carbon fiber netting at a temperature of 900 ° C was fabricated by polyacrylonitrile monofilament (precursor filaments for activated carbon fibers) having a strength of 25 g / d and woven in a mesh form .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 1.8 g / d, and the specific surface area was 650.

Example  3

A precursor fabric for an activated carbon fiber net in which a polyacrylonitrile monofilament having a strength of 10 g / d was woven in a mesh form was activated at a temperature of 900 ° C to produce an activated carbon fiber net .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 0.43 g / d, and the specific surface area was 1,100.

Example  4

Activated carbon fiber fishing net having a mesh size of polyacrylonitrile monofilament (precursor filaments for activated carbon fibers) having a strength of 20 g / d was activated at a temperature of 900 ° C to produce an activated carbon fiber net .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 1.25 g / d, and the specific surface area was 800.

Example  5

Activated carbon fiber mesh net having a strength of 30 g / d was woven in the form of a mesh of polyacrylonitrile monofilaments (precursor filaments for activated carbon fibers) was activated at a temperature of 900 ° C to produce an activated carbon fiber net .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 2 g / d, and the specific surface area was 600.

Example  6

A precursor fabric for an activated carbon fiber net in which polyacrylonitrile-based monofilaments (precursor filaments for activated carbon fibers) having a strength of 10 g / d was woven in a mesh form was activated at a temperature of 650 ° C to produce an activated carbon fiber net .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 1.05 g / d, and the specific surface area was 800.

Example  7

The activated carbon fiber mesh net was activated by treating the precursor fabric for activated carbon fiber netting, in which the polyacrylonitrile monofilament (precursor filaments for activated carbon fibers) having a strength of 10 g / d was woven in a mesh form, at a temperature of 800 ° C .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 0.51 g / d, and the specific surface area was 1,100.

Example  8

An activated carbon fiber fishing net was prepared by activating a precursor fabric for an activated carbon fiber fishing net in which polyacrylonitrile-based monofilaments (precursor filaments for activated carbon fibers) having a strength of 10 g / d were woven in a mesh form at a temperature of 950 ° C .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 0.16 g / d, and the specific surface area was 1,300.

Comparative Example  One

Activated carbon fiber fishing net was prepared by activating the precursor fabric for the activated carbon fiber fishing net in which the polyacrylonitrile monofilament (precursor filaments for activated carbon fibers) having a strength of 35 g / d was woven in a mesh form at a temperature of 600 ° C .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 2.1 g / d, and the specific surface area was 200.

Comparative Example  2

The activated carbon fiber mesh net was activated by treating the precursor fabric for the activated carbon fiber mesh in which the polyacrylonitrile monofilament (precursor filaments for activated carbon fibers) having a strength of 5 g / d was woven in a mesh form at a temperature of 1,000 ° C. .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 0.01 g / d, and the specific surface area was 1,500.

Comparative Example  3

Activated carbon fiber fishing net having a mesh size of polyacrylonitrile monofilament (precursor filaments for activated carbon fibers) having a strength of 3 g / d was activated at a temperature of 800 ° C to produce an activated carbon fiber net .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 0.01 g / d, and the specific surface area was 600.

Comparative Example  4

A precursor fabric for an activated carbon fiber fishing net in which polyacrylonitrile-based monofilaments (precursor filaments for activated carbon fibers) having a strength of 35 g / d was woven in a mesh form was activated at a temperature of 800 ° C. to produce an activated carbon fiber fishing net .

The strength of the filament type activated carbon fiber composing the activated carbon fiber fishing net was 2.03 g / d, and the specific surface area was 300.

The filament type activated carbon fibers prepared in Examples 1 to 9 had high durability and high adsorption efficiency because of high strength and high specific surface area.

However, the filament type activated carbon fibers produced in Comparative Example 1 and Comparative Example 4 had high strength, but had a low specific surface area, resulting in poor adsorption efficiency.

In addition, the filament type activated carbon fibers prepared in Comparative Example 2 and Comparative Example 3 had a high specific surface area but a low strength, so that the adsorption efficiency was excellent but the durability was poor.

Claims (4)

Characterized in that the filament type activated carbon fibers have a mesh-like structure and the filament type activated carbon fibers have a yarn strength of 0.1 to 2.0 g / d. The activated carbon fiber net according to claim 1, wherein the filament type activated carbon fiber has a specific surface area of 600 to 1,300. Characterized in that the precursor fabric for activated carbon fiber fishing net, in which precursor filaments for activated carbon fibers having a yarn strength of 5 to 30 g / d are woven in a mesh form, is activated at a temperature of 650 to 950 ° C. ≪ / RTI > The active carbon fiber fishing net according to claim 3, wherein the precursor filament for activated carbon fiber is one selected from the group consisting of a polyacrylonitrile-based filament, a polyvinyl alcohol-based filament, a pitch-based filament, a cellulose-based filament and a phenolic filament Gt;