CN112521723B - Nano carbon conductive high-toughness black matrix and preparation method thereof - Google Patents
Nano carbon conductive high-toughness black matrix and preparation method thereof Download PDFInfo
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
- C08J2423/30—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by oxidation
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K3/041—Carbon nanotubes
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- C08K5/49—Phosphorus-containing compounds
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Abstract
The invention discloses a nano carbon conductive high toughness black masterbatch and a preparation method thereof, which is prepared from resin, a carbon conductive composition and a modifier, wherein the pipe diameter of a carbon nano pipe in the carbon conductive composition is 50-300 nm, the pipe diameter ratio is 300-600, and the DBP absorption value of carbon black is 150 multiplied by 10 ‑5 ～210×10 ‑5 M 3 /kg. According to the carbon nano-conductive high-toughness black matrix and the preparation method thereof, the carbon nano-tube is subjected to pre-dispersion treatment, so that the uniformity of later mixing is improved, the black matrix has extremely high conductivity and dispersibility, the product has antistatic property and permanent retention, the resistance value is low, the mechanical property of resin is extremely retained, the carbon nano-conductive high-toughness black matrix has good temperature stability, the piezoresistance linearity is good, the consumption is low, the precision key equipment can be met, and the problems of slow reaction, short service life, large resistance value and the like of the existing plastic conductor are effectively solved.
Description
Technical Field
The invention belongs to the technical field of black matrix preparation, and particularly relates to a nano carbon conductive high-toughness black matrix and a preparation method thereof.
Background
Most of the current black matrixes are plastic colorants which are prepared by well dispersing high proportion of carbon black or additives and thermoplastic resin, and the selected resin has good wetting and dispersing effects on the colorants and has good compatibility with the colored materials; mixing and granulating the carbon black, natural resin and auxiliary agent to obtain black plastic, and then using the black plastic in a forming process; the black matrix has better dispersibility in products, the carrier of the special black matrix is the same as the plastic variety of the products, has good matching property, and carbon black particles can be well dispersed in the plastic of the products after heating and melting, so that the colorability of the carbon black is kept, and if the carbon black is directly used, the phenomena of water absorption, oxidization and the like can occur when the carbon black is directly contacted with air in the storage and use processes, and after the carbon black is made into the matrix, the quality of the color is kept unchanged for a long time due to the isolation of the carbon black, the air and the moisture by the resin carrier, the color matrix particles are similar to the resin particles, are more convenient and accurate in metering, can not adhere to a container during mixing, are also more uniform with the mixing of the resin, so that the stability of the addition quantity can be ensured, and the stability of the color of the products can be ensured. However, the traditional black matrix does not have obvious conductive performance or the conductive performance is insufficient and the mechanical performance of the resin is affected, so the invention aims to develop a novel nano carbon conductive high-toughness black matrix to make up for market blank.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a nano carbon conductive high-toughness black matrix and a preparation method thereof.
In order to achieve the above purpose and achieve the above technical effects, the invention adopts the following technical scheme:
a nano-carbon conductive high-toughness black matrix is prepared from resin, carbon conductive composition and modifier.
Further, the carbon nano-conductive high-toughness black matrix comprises the following components in parts by weight:
48-65 parts of resin
11-35 parts of carbon conductive composition
2-10 parts of modifier.
Further, the resin is a vinyl resin.
Further, the carbon conductive composition comprises carbon black and carbon nanotubes, wherein the weight ratio of the carbon black to the carbon nanotubes is 3:1 to 3:3.
further, the DBP absorption value of the carbon black is 150×10 -5 ～210×10 -5 M 3 /kg。
Further, the diameter of the carbon nano tube is 50-300 nm, and the diameter ratio is 300-600.
The invention also discloses a preparation method of the carbon nanocarbon conductive high-toughness black master batch, which comprises the following steps:
(1) Weighing 48-65 parts of resin, 11-20 parts of carbon conductive composition and 2-5 parts of modifier according to parts by weight, wherein the weight ratio of carbon black to carbon nano tube in the carbon conductive composition is 3:1 to 3:3, a step of;
(2) Pre-dispersing the carbon nano tube;
(3) Mixing and stirring 11-35 parts of carbon conductive composition and 2-10 parts of modifier uniformly to obtain a mixture a;
(4) Mixing and stirring the mixture a and 48-65 parts of resin uniformly;
(5) And (3) placing the material obtained in the step (4) into a double-rotor continuous internal mixer group for banburying, and then extruding, granulating, dehydrating, sieving, demagnetizing, homogenizing and packaging.
Further, in the step (2), the step of performing the pre-dispersing treatment on the carbon nanotubes includes:
the carbon nano tube is put into a high-temperature stirrer to be stirred and wetted with vinylamide at high temperature.
Further, in the step (5), the technological parameters of the twin-rotor continuous internal mixer set are as follows: the first temperature is 60-80 ℃ and the second temperature is 90-105 ℃; the temperature of the discharge port of the double-rotor continuous internal mixer set is 200-210 ℃; the water temperature of the rotor is 25-30 ℃, and the rotating speed is 350-400 revolutions per minute; after banburying, a mixture b is obtained.
Further, in the step (5), the mixture b after banburying by the twin-rotor continuous internal mixer group is input into a single screw extruder for extrusion and granulation, and the technological parameters of the single screw extruder are as follows: the temperature from the feed inlet of the single screw extruder to the section of the granulating die head is 100-120 ℃, 160 ℃ and 180-200 ℃ respectively; the water temperature of the screw is 30-40 ℃; the temperature of the granulating die head is 230-250 ℃, and the temperature of granulating water is 55-70 ℃; the material pressure of the single screw extruder is 90-105 MPa.
Compared with the prior art, the invention has the beneficial effects that:
the pipe diameter of the carbon nano-tube is 50-300 nm, the pipe diameter ratio is 300-600, and the carbon nano-tube is subjected to pre-dispersion treatment, so that the uniformity of later mixing is improved, and the black matrix has extremely high conductivity and dispersibility;
screening carbon black having DBP absorption value and particle size distribution within specific ranges, the DBP absorption value being 150X 10 by adding -5 ～210×10 -5 M 3 The carbon black of/kg enables the product to have more antistatic property and permanent retention, and simultaneously has lower resistance value and greatly retains the mechanical property of the resin, and has permanent conduction and antistatic effects;
the carbon black and the carbon nano tube are combined for uniformly mixing and then are mixed with the resin, so that uniformity, conductivity and resistance can be improved, good temperature stability are realized, the piezoresistance linearity is good, the problems of slow reaction, short service life, large resistance and the like of the existing plastic conductor and the like can be effectively solved, the use of electronic equipment, particularly the use of a precise instrument, the addition quantity can be greatly reduced, and the mechanical property of the resin is greatly reserved.
Detailed Description
The following embodiments of the present invention are described in detail so that the advantages and features of the present invention may be more readily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of the present invention.
The nano carbon conductive high-toughness black matrix is prepared from resin, a carbon conductive composition and a modifier, and comprises the following components in parts by weight:
48-65 parts of resin
11-35 parts of carbon conductive composition
2-10 parts of modifier.
The resin is vinyl resin; the modifier is maleic anhydride grafted vinyl or propenyl, dilauryl phosphite, oxidized polyethylene wax, etc.
The carbon conductive composition comprises carbon black and carbon nanotubes, wherein the weight ratio of the carbon black to the carbon nanotubes is 3:1 to 3:3, the DBP absorption value of the carbon black is 150 multiplied by 10 -5 ～210×10 -5 M 3 The pipe diameter of the carbon nano-tube is 50-300 nm, and the pipe diameter ratio is 300-600.
The preparation method of the nano carbon conductive high-toughness black master batch comprises the following steps: stirring, banburying, extruding, granulating, dehydrating, sieving, over-magnetic, homogenizing and packaging, and specifically comprises the following steps:
(1) Weighing 48-65 parts of resin, 11-35 parts of carbon conductive composition and 2-10 parts of modifier according to parts by weight, wherein the weight ratio of carbon black to carbon nano tube in the carbon conductive composition is 3:1 to 3:3, a step of;
(2) Pre-dispersing the carbon nano tube: the carbon nano tube is put into a high-temperature mixer to be mixed and wetted with the vinylamide at high temperature, so that the mixing uniformity among the carbon nano tube, the modifier and the resin in the later stage is facilitated.
(3) Mixing and stirring 11-35 parts of carbon conductive composition and 2-10 parts of modifier uniformly to obtain a mixture a;
(4) Mixing and stirring the mixture a and 48-65 parts of resin uniformly;
(5) And (3) placing the material obtained in the step (4) into a double-rotor continuous internal mixer group for banburying, and then extruding, granulating, dehydrating, sieving, demagnetizing, homogenizing and packaging.
In the step (5), the technological parameters of the double-rotor continuous internal mixer set are as follows: the first temperature is 60-80 ℃ and the second temperature is 90-105 ℃; the temperature of the discharge port of the double-rotor continuous internal mixer set is 200-210 ℃; the temperature of the rotor water is 25-30 ℃, and the rotating speed is 350-400 r/min; after banburying, a mixture b is obtained.
In the step (5), a double-rotor continuous internal mixer group is put into the internal mixer for banburying, and a product b after banburying is put into a single-screw extruder for extrusion granulation, wherein the technological parameters of the single-screw extruder are as follows: the temperature from the feed inlet of the single screw extruder to the section of the granulating die head is 100-120 ℃, 160 ℃ and 180-200 ℃ respectively; the water temperature of the screw is 30-40 ℃; the temperature of the granulating die head is 230-250 ℃, and the temperature of granulating water is 55-70 ℃; the material pressure of the single screw extruder is 90-105 MPa.
Example 1
The nano carbon conductive high-toughness black matrix is prepared from resin, a carbon conductive composition and a modifier, and comprises the following components in parts by weight:
60 parts of resin
35 parts of carbon conductive composition
5 parts of modifier.
Carbon black having a DBP absorption of 150X 10 -5 M 3 /kg～160×10 -5 M 3 The external diameter of the carbon nano tube is 50 nm-80 nm, and the weight ratio of carbon black to the carbon nano tube is 3:2.
example 2
The nano carbon conductive high-toughness black matrix is prepared from resin, a carbon conductive composition and a modifier, and comprises the following components in parts by weight:
50 parts of resin
15 parts of carbon conductive composition
8 parts of modifier.
The DBP absorption value of the carbon black in the carbon conductive composition is 160 multiplied by 10 -5 M 3 /kg～180×10 -5 M 3 The external diameter of the carbon nano tube is 80 nm-120 nm, and the weight ratio of carbon black to the carbon nano tube is 3:2.
example 3
The nano carbon conductive high-toughness black matrix is prepared from resin, a carbon conductive composition and a modifier, and comprises the following components in parts by weight:
65 parts of resin
20 parts of carbon conductive composition
2 parts of modifier.
The DBP absorption value of the carbon black in the carbon conductive composition is 180 multiplied by 10 -5 M 3 /kg～200×10 -5 M 3 The external diameter of the carbon nano tube is 120 nm-200 nm, and the weight ratio of carbon black to the carbon nano tube is 3:2.
example 4
The nano carbon conductive high-toughness black matrix is prepared from resin, a carbon conductive composition and a modifier, and comprises the following components in parts by weight:
48 parts of resin
35 parts of carbon conductive composition
10 parts of modifier.
The DBP absorption value of the carbon black in the carbon conductive composition is 200 multiplied by 10 -5 M 3 /kg～210×10 -5 M 3 The external diameter of the carbon nano tube is 200 nm-300 nm, and the weight ratio of carbon black to the carbon nano tube is 3:2.
the part of the invention which is not specifically described is only required to adopt the prior art, and is not described in detail herein.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present invention.
Claims (1)
1. The preparation method of the nano carbon conductive high-toughness black master batch is characterized by comprising the following steps of:
(1) Weighing 48-65 parts of resin, 11-35 parts of carbon conductive composition and 2-10 parts of modifier according to parts by weight, wherein the weight ratio of carbon black to carbon nano tube in the carbon conductive composition is 3:1 to 3:3, a step of;
(2) Pre-dispersing the carbon nano tube;
(3) Mixing and stirring 11-35 parts of carbon conductive composition and 2-10 parts of modifier uniformly to obtain a mixture a;
(4) Mixing and stirring the mixture a and 48-65 parts of resin uniformly;
(5) Putting the material obtained in the step (4) into a double-rotor continuous internal mixer group for banburying, and then extruding, granulating, dehydrating, sieving, demagnetizing, homogenizing and packaging;
the resin is vinyl resin;
the DBP absorption value of the carbon black is 150 multiplied by 10 -5 ～210×10 -5 M 3 /kg；
The pipe diameter of the carbon nano-tube is 50-300 nm, and the pipe diameter ratio is 300-600;
in the step (2), the step of performing the pre-dispersion treatment on the carbon nanotubes includes:
placing the carbon nano tube into a high-temperature stirrer, and stirring and wetting the carbon nano tube and vinylamide at high temperature;
in the step (5), the technological parameters of the twin-rotor continuous internal mixer set are as follows: the first temperature is 60-80 ℃ and the second temperature is 90-105 ℃; the temperature of the discharge port of the double-rotor continuous internal mixer set is 200-210 ℃; the water temperature of the rotor is 25-30 ℃, and the rotating speed is 350-400 revolutions per minute; mixing to obtain a mixture b;
in the step (5), the mixture b after banburying by the double-rotor continuous internal mixer group is input into a single screw extruder for extrusion and granulation, and the technological parameters of the single screw extruder are as follows: the temperature from the feed inlet of the single screw extruder to the section of the granulating die head is 100-120 ℃, 160 ℃ and 180-200 ℃ respectively; the water temperature of the screw is 30-40 ℃; the temperature of the granulating die head is 230-250 ℃, and the temperature of granulating water is 55-70 ℃; the material pressure of the single screw extruder is 90-105 MPa.
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