KR19980051687A - Manufacturing method of antistatic material - Google Patents

Abstract

The present invention relates to a method of manufacturing an antistatic material, the conventional antistatic material is formed of three or more layers of polymer layer / metal layer / polymer layer, the contact between the heterogeneous series is made adhesion is low, the unit cost of metals is high There was a problem that the unit price increased.

Therefore, the present invention can shorten the layer structure of the antistatic material by synthesizing the polyaniline, a conductive polymer series that can control the surface resistance value within the range of about 10 ⁻³ to 10 ⁻¹¹ Ω / sq, and has a similar antistatic effect. While bringing the manufacturing cost can be obtained inexpensive effect.

Description

Manufacturing method of antistatic material

The present invention relates to a method for producing an antistatic material, and more particularly to a method for producing an antistatic material consisting of polyaniline of a polymer series.

In general, static electricity is generated when a material is charged and has an electric charge therein. The static electricity may cause deterioration, deformation, or breakdown of electronic circuit components or high-tech industrial components, and may occur in plastic sheets, films, or the like. When handling resin products or opening / closing doors indoors or outdoors, shocks may occur due to charging of the human body.

In order to prevent such static electricity, an electronic component or the like uses a packaging material coated with an antistatic material. In general, a conventional antistatic material coated on a packaging material has a polyethylene layer formed therein to prevent static electricity. The anti-corrosion material is applied to, and in the middle, a metal layer such as aluminum is applied.

However, the conventional method of manufacturing an antistatic material includes a metal layer, and thus, a separate layer must be provided to prevent corrosion of the metal layer, and thus has a laminated structure of three or more layers. There is a problem falling, there is a problem that the manufacturing cost increases because the unit price of metals is high.

Therefore, the present invention is to solve the above-mentioned conventional problems, it is possible to shorten the layer structure of the antistatic material by synthesizing the polymer-based polyaniline, bringing the antistatic effect similar to the conventional, but the manufacturing cost is low And to provide a method for producing an antistatic material excellent in adhesion.

The present invention for achieving this purpose is the step of adding a solution containing ammonium peroxydisulfate to the solution containing aniline, and after the reaction using a filter paper filtered and the precipitate is colorless Washing with HCl to obtain flakes, filtering the filtered flakes again in HCl, filtering and drying to obtain 50% protonated polyaniline, and the 50% quantized polyaniline was again pH 9 Reacting in a NH ₄ OH solution maintained by the step of obtaining a piece by filtration, and drying the piece in a drying tube connected to a vacuum line to obtain a polypyrrole powder, and the powder Adding to the organic solvent, and drying the solution in which the organic solvent is completely dissolved on a glass substrate and then drying in a convection oven. It provides a process for the production of the anti-static material.

1 is a graph showing an indirect change in surface resistance according to an organic solvent.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A conductive polymer such as polyaniline is itself a material that can be easily mixed with a paint as an organic material and has excellent flexibility and processability, and thus is used as a new conductor, thin display device, or antistatic material.

The polyaniline has a wide range of electrical conductivity from the semiconductor region to the conductor region, and only three of the four electrons involved in the bonding of carbon contribute to molecular bonding as S-bonds, and the remaining 1 Electrons are unsaturated and have a sp ₂ molecular orbital to form a P energy band.

In addition, according to the structure of the P-conjugation (conjugation) and the delocalized electrons after doping, which are widely spread along the polymer backbone, they are classified into reducing type, intermediate oxidation type, and oxidation type. And physical properties can be obtained in various ways.

On the other hand, the conduction of the conductive polymer can be largely interpreted by two theories, and the soliton theory, polyaniline and polythiophene represented by polypyrrole and polyacetylene. An example is the polaron theory.

First, in isolated wave theory, isolated wave refers to a structural defect in a chain such as polypyrrole, and has a degenerate ground state in which polypyrrole chains on the left and right of the structural defect are symmetrically.

Such structural defects of the conductive polymer exist in three kinds of neutral, positive and negative soliton, and when the charge is charged, the spin becomes zero and when the charge is zero, it becomes 1/2.

That is, the concept contrary to the phenomenon in which the charged particles are found in ordinary electrons or protons, or the electrical conductivity occurs because these charged solitones exist in the chain.

In addition, in the case of polyaline, in the case of polyaniline, the arrangement of molecules on the left and right sides of the structural defect is asymmetric, resulting in a non-degenerate ground state whose energy states are not identical. Bipolarons are formed by pairing two polarons.

In other words, the destructive state in the conductive polymer chain degenerates from the deflated isolation plate level, resulting in level splitting of the energy levels, thereby forming conductivity by forming the polaron and bipolaron levels.

Meanwhile, polyaniline was dissolved in 300 ml of 1 M HCl in 20 ml (˜0.22 mol) of aniline and cooled to 0 ° C., and 11.5 g (0.05 mol) of ammonium peroxydisulfate was added in 200 ml of 1 M HCl. Melt and cool to 0 ° C.

After 0 ° C., the solution containing the oxidant is slowly added to the solution containing aniline over a magnetic stirrer over 2 minutes while stirring.

After about 5 minutes the solution begins to react, giving a dark green color, and over time the copper luster appears on the surface of the solution. Stir the reaction with a magnetic stir and leave for 90 minutes while setting the temperature to 0 ° C. After 90 minutes, the filter is filtered using Whatman filter paper, and the precipitate is washed with 1M HCl until it is colorless and left for 10 minutes in suction. This filtered piece was again made into a turbid solution in 10 ml of 1 M HCl and filtered with a funnel. At this time, using 2 L of 1 M HCl, the filtrate was washed from pale yellow to completely colorless and dried for 10 minutes with suction to obtain 50% protonated polyaniline. This 50% quantized fragment of emeraldine hydrochloride was again stirred in a 500 ml solution of 0.1 N NH ₄ OH for 15 hours with a magnetic stirrer, and an appropriate amount of 1 N NH ₄ OH solution was added to maintain the reaction solution at pH 9. do. The reaction solution is filtered after 15 hours and washed with 0.1 N NH ₄ OH. The filtered pieces are dried for 48 hours in a drying tube connected to a 10 ^-3 torr vacuum line to uniformly stir the dried powder in a mortar to obtain polyaniline powder.

The polyaniline powder thus prepared is slowly added to various organic solvents (m-cresol, formic acid, chloroform NMP (N-methyl-2-pyrrolidinone, etc.)).

1 is a graph showing the change in the surface resistance according to the organic solvent added camphorsulfonic acid (HCSA; camphorsulfonic acid), Figure 2 is according to the organic solvent added dodecylbenzenesulfonic acid (HDBSA) This graph shows the change in surface resistance.

That is, the surface resistance value for preventing static electricity is preferably about 10 ⁻³ to 10 ⁻¹¹ Ω / sq, but an appropriate surface resistance value can be adjusted according to the selection of the organic solvent.

Subsequently, the organic solvent is further stirred with a magnetic stirrer until the organic solvent is completely dissolved, and then the obtained solution is put into a syringe filled with glass wool with a filter and compressed to remove the insoluble portion to prepare a uniform solution.

The solution is poured onto a clean, dried, leveled glass substrate and dried in a convection oven maintained at about 60 ° C. for about 15 hours to complete the manufacture of an antistatic material having a film shape.

On the other hand, in order to apply the antistatic material consisting of the polyaniline to the packaging material it is also possible to coat the base material such as polyester having an insulating property and a predetermined mechanical properties.

In particular, the antistatic material including the conventional metal layer should be provided with a separate anticorrosion layer in order to prevent corrosion of the metal layer, etc., the antistatic material of the present invention is made of a polymer-based polyaniline not to worry about corrosion protection, etc. Since it is not necessary, the layer structure can be shortened.

In addition, since the price of the conductive polymer is lower than that of the conventional metals, the production cost can be reduced, and the surface resistance can be adjusted according to the type of the organic solvent. There is no problem of deterioration of the bonding force.

The foregoing is merely illustrative of a preferred embodiment of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without changing the subject matter of the present invention.

Accordingly, the present invention can shorten the layer structure of the antistatic material by synthesizing the polymer-based polyaniline, and can bring about an antistatic effect similar to the conventional one, but at a low manufacturing cost and excellent adhesion.

Claims (2)

Adding a solution containing ammonium peroxydisulfate to the solution containing aniline, After the reaction, the mixture was filtered using a filter paper, and the precipitate was washed with HCl until colorless, to obtain pieces. Filtering the filtered pieces again in HCl, filtering and drying to obtain 50% protonated polyaniline, Reacting this 50% quantized polyaniline in a NH ₄ OH solution maintained at pH 9 and then filtering to obtain flakes, Drying the pieces in a drying tube connected to a vacuum line to obtain polypyrrole powder; Adding the powder to an organic solvent, And pouring the solution in which the organic solvent is completely dissolved onto a glass substrate, and drying the resultant in a convection oven. The method of claim 1, The organic solvent is m-cresol, formic acid (formic acid), chloroform (chloroform), NMP (N-methyl-2- pyrrolidinone) The method of manufacturing an antistatic material, characterized in that any one.