CN111363278B - Fluorine-lined anti-static pipeline and processing technology thereof - Google Patents

Fluorine-lined anti-static pipeline and processing technology thereof Download PDF

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CN111363278B
CN111363278B CN202010183497.0A CN202010183497A CN111363278B CN 111363278 B CN111363278 B CN 111363278B CN 202010183497 A CN202010183497 A CN 202010183497A CN 111363278 B CN111363278 B CN 111363278B
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nickel
carbon fiber
fluorine
lined
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CN111363278A (en
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张发明
陈宝意
谢继任
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Nanjing Sanhe Anticorrosive Equipment Co ltd
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Nanjing Sanhe Anticorrosive Equipment Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08L27/18—Homopolymers or copolymers or tetrafluoroethene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2217—Oxides; Hydroxides of metals of magnesium
    • C08K2003/222—Magnesia, i.e. magnesium oxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C08K2003/2272—Ferric oxide (Fe2O3)
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/001—Conductive additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/04—Antistatic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Abstract

The invention relates to a fluorine-lined anti-static pipeline and a processing technology thereof, wherein the pipeline comprises a main pipe and a tetrafluoro lining layer lined on the inner wall of the main pipe, and the tetrafluoro lining layer comprises the following components in parts by weight: 70-80 parts of PTFE powder, 20-30 parts of nickel-loaded carbon fiber, 10-15 parts of chimney ash, 1-3 parts of anti-cracking agent and 1-3 parts of heat stabilizer; the processing technology comprises mixing, pouring, shaping and sintering; the components are mixed, so that the fluorine lining pipeline with excellent antistatic property can be prepared, static generated when waste gas is conveyed in the pipeline can be dredged in time, an antistatic effect is achieved, and the safety of conveying the waste gas is improved.

Description

Fluorine-lined anti-static pipeline and processing technology thereof
Technical Field
The invention relates to the technical field of fluorine-lined pipelines, in particular to a fluorine-lined anti-static pipeline and a processing technology thereof
Background
The steel lining tetrafluoro pipeline is composed of a mother pipe and a lining anti-corrosion layer, the mother pipe is welded with a steel pipe or a seamless pipe in multiple choices, the lining anti-corrosion layer is made of a tetrafluoro raw material which is heat-resistant, high-pressure resistant and corrosion-resistant, and after the mother pipe is compounded with the lining anti-corrosion layer, the steel lining tetrafluoro pipeline has the characteristics of corrosion resistance, aging resistance, low friction coefficient, non-adhesiveness, wide temperature resistance range and the like, and is commonly used for conveying pipes, exhaust pipes and the like for conveying corrosive gas.
At present, chinese patent that application publication number is CN 110608319A in the current patent discloses a steel lining tetrafluoro pipeline, relate to pipeline technical field, contain the pipeline main part, the burr, the tetrafluoro parent tube, the temperature resistant resin, the buffer layer, the steel lining, the flange, fire prevention look lacquer layer, the protective layer, the pipeline main part is straight tube or 90 elbow pipes, pipeline main part outside is provided with the burr, the inside tetrafluoro parent tube that is of pipeline main part, the inboard surface coating of tetrafluoro parent tube has the temperature resistant resin, set up the buffer layer between steel lining and the tetrafluoro parent tube, buffer layer surface hel steel lining internal surface bonding is fixed, the steel lining both ends set up the flange, the steel lining outside sets up fire prevention look lacquer layer, fire prevention look lacquer layer outer surface coating protective layer, have the advantage that high temperature resistant and pressure resistance are good, be difficult for receiving external force to damage.
However, when the steel-lined tetrafluoro pipe is applied to industries such as chemical plants, pharmaceutical factories, mines, machinery, environmental protection, bioengineering, metallurgy, chemical fiber and the like, tail gas absorption and waste gas emission can be carried out in the production process of the industries and enterprises, when waste gas is conveyed in the steel-lined tetrafluoro pipe, static electricity can be generated due to friction between the conveying speed and the pipe wall of the tetrafluoro pipe, and if certain conditions are met, burning or explosion accidents are easily caused, so that tragedy is caused, and the loss of lives and properties of people is caused.
Disclosure of Invention
The invention aims to provide a fluorine-lined anti-static pipeline which has excellent anti-static performance, can dredge static generated when waste gas is conveyed in the pipeline in time and improve the safety when the waste gas is conveyed; the invention also aims to provide a processing technology of the fluorine-lined anti-static pipeline, which is simple in process and stable in quality of the formed tetrafluoro lining layer.
The above object of the present invention is achieved by the following technical solutions:
the fluorine-lined antistatic pipeline comprises a mother pipe and a tetrafluoro lining layer lined on the inner wall of the mother pipe, wherein the tetrafluoro lining layer comprises the following components in parts by weight: 70-80 parts of PTFE powder, 20-30 parts of nickel-loaded carbon fiber, 10-15 parts of chimney ash, 1-3 parts of anti-cracking agent and 1-3 parts of heat stabilizer.
By adopting the technical scheme, the PTFE powder has excellent chemical resistance, good electrical insulation, extremely high flame retardance, excellent self-lubricating property, high weather resistance and ageing resistance, and also has the characteristics of good ultraviolet resistance, scratch resistance and scratch resistance, good thermal stability and wide application temperature range;
the carbon fiber loaded with nickel can increase the conductive contact points on the surface of the carbon fiber, which is beneficial to improving the conductivity of the carbon fiber, and the nickel-loaded carbon fiber is dispersed in a PTFE system to play a role of a conductive network; the chimney ash surface has excellent adsorption effect and can be attached to the surfaces of the nickel-loaded carbon fibers and the PTFE powder, so that the uniform dispersion and regular arrangement of the nickel-loaded carbon fibers in a PTFE system are promoted; according to the application, the nickel-loaded carbon fiber and the chimney ash are compounded, so that the excellent antistatic property of the PTFE system is favorably ensured, the antistatic effect is better compared with that of a traditional pipeline added with conductive carbon black, and the defect of high coloring degree of a tetrafluoro lining layer is caused by the addition of the conductive carbon black; the anti-cracking agent is added, so that the phenomenon that the nickel-loaded carbon fiber is easy to crack when being blended with PTFE powder is solved; the addition of the heat stabilizer is helpful for ensuring that the PTFE liner has the advantages of uniform and stable texture; the components are mixed, so that the fluorine lining pipeline with excellent antistatic property can be prepared, static generated when waste gas is conveyed in the pipeline can be dredged in time, an antistatic effect is achieved, and the safety of conveying the waste gas is improved.
The invention is further configured to: heating the PTFE powder at 280-300 ℃ for 4-6 hours in advance to obtain a softened body; and adjusting the shearing rotating speed to 230-250 r/min, and shearing the softened body at a high speed to perform viscosity reduction treatment.
Through adopting above-mentioned technical scheme, for increasing the homogeneity of PTFE powder and year nickel carbon fiber, chimney ash blending, the viscosity reduction is done to the PTFE powder to this application, because the PTFE powder heats the softening back, the viscosity of PTFE system increases, is difficult for the even blending of PTFE powder and other components, and after high-speed shearing, the viscosity of the PTFE softening body reduces, has improved the processing ease of PTFE powder and other components.
The invention is further configured to: the nickel-loaded carbon fiber is prepared by plating a nickel film on the surface of carbon fiber cloth in a magnetron sputtering mode, then crushing the nickel-loaded carbon fiber cloth into short nickel-loaded carbon fiber with the length of 8-10 mm, wherein the ratio of the long diameter to the short diameter of the short nickel-loaded carbon fiber is (8-10): 1.
By adopting the technical scheme, the carbon fiber cloth is plated with the nickel film in a magnetron sputtering mode, magnetron sputtering is adopted, large-area film plating can be realized, the adhesion force is strong, and then the short-cut nickel-loaded carbon fibers are crushed, so that the uniform blending of the nickel-loaded carbon fibers in PTFE powder is facilitated, a conductive grid is formed in a PTFE system, and the electrostatic discharge of a PTFE lining layer is facilitated.
The invention is further configured to: the fineness of the chimney ash is 800-1000 meshes.
By adopting the technical scheme, the fineness of the chimney ash is limited to be fine, so that the surface of the chimney ash has excellent adsorbability and is favorable for being attached to the surfaces of PTFE (polytetrafluoroethylene) powder and nickel-loaded carbon fibers; and the chimney ash has excellent temperature resistance, and is beneficial to improving the thermal stability of the PTFE system, thereby improving the forming quality of the PTFE lining layer.
The invention is further configured to: the anti-cracking agent is a composition of terpene phenolic resin powder and a silane coupling agent compounded in a weight ratio of (3-5) to 1.
By adopting the technical scheme, the terpene phenolic resin powder contains polar groups, has good compatibility with other matrix resins, also has excellent cohesive strength, excellent thermal stability and excellent viscosity, and is more tightly combined with a matrix material after thermoforming; the silane coupling agent has the function of enhancing the affinity between organic matters and inorganic compounds, can obviously improve the bonding fastness of PTFE powder, nickel-loaded carbon fiber and chimney ash, and moreover, unsaturated groups in the silane coupling agent and unsaturated bonds in terpene phenolic resin generate chemical reaction, which is beneficial to further improving the bonding tightness of the terpene phenolic resin in a formula system.
The invention is further configured to: the silane coupling agent is a composition of an acyloxy-containing silane coupling agent and an amino-containing silane coupling agent which are compounded in a weight ratio of 1: 1.
Through adopting above-mentioned technical scheme, the silane coupling agent that contains acyloxy is applicable to improving the associativity of PTFE powder and chimney ash, and the silane coupling agent that contains amino is applicable to improving the associativity of terpene phenolic resin and chimney ash, and the silane coupling agent that this application adopted contains acyloxy is compound with the silane coupling agent that contains amino, can show the structure compactness that improves the tetrafluoro lining.
The invention is further configured to: the heat stabilizer is selected from the following components in parts by weight (5-10): 1 composite of compounded polyetherimide powder and hydroxyl silicone oil.
By adopting the technical scheme, the polyetherimide powder belongs to amorphous plastics, is an amorphous high-performance polymer, and has high strength, high rigidity and wear resistance at high temperature; the polyetherimide powder has excellent chemical resistance, higher flexural modulus and excellent fire resistance; in the heating process, the viscosity of the polyetherimide powder is very high, the hydroxyl silicone oil is added, the viscosity reduction effect on the polyetherimide powder can be effectively achieved, and the polyetherimide powder and the hydroxyl silicone oil are compounded, so that the apparent quality of the formed tetrafluoro lining layer is improved.
The second aim of the invention is realized by the following technical scheme:
a processing technology of a fluorine-lined anti-static pipeline comprises the following steps:
(1) preparing materials: weighing 70-80 parts of PTFE powder, 20-30 parts of nickel-loaded carbon fiber, 10-15 parts of chimney ash, 1-3 parts of anti-cracking agent and 1-3 parts of heat stabilizer according to parts by weight;
(2) uniformly mixing the components to obtain a mixture;
(3) fixing a rubber mold in a steel billet through a flange, reserving a pouring hole on the flange, injecting a mixture into a space between the rubber mold and the inner wall of the steel billet through the pouring hole, and sealing the pouring hole after the mixture is uniformly distributed;
(4) injecting water into the rubber mold until the rubber mold is tensioned, and keeping for 2-10 hours;
(5) and discharging water, taking out the rubber mold, placing the rubber mold into a mold, placing the mold into a sintering furnace, gradually heating to 380 ℃, gradually increasing the temperature at 5 ℃/min, preserving the heat for 1h, and naturally cooling to room temperature.
By adopting the technical scheme, the fluorine lining conductive pipeline is simple in processing technology, a mixture with good antistatic performance is pumped between the rubber die and the inner wall of the billet, and after shaping and sintering, the fluorine lining layer is stable in quality and excellent in antistatic performance.
In conclusion, the beneficial technical effects of the invention are as follows:
1. when the waste gas is conveyed in the pipeline, the conductive pipeline can lead out static electricity in time, and has a good anti-static effect so as to ensure the safety of the waste gas conveyed by the pipeline;
2. the conductive filler is prepared by compounding nickel-loaded carbon fiber and chimney ash, and replaces the traditional conductive carbon black, so that the problem of high coloring degree caused by the conductive carbon black is solved;
3. the carbon fiber is subjected to surface treatment, a nickel base is attached to the surface of the carbon fiber in a magnetron sputtering mode to form more conductive contact points, and then the nickel-loaded carbon fiber forms a conductive bridge in a PTFE system, so that the antistatic performance of the PTFE system is remarkably improved;
4. the terpene phenolic resin and the silane coupling agent are added, so that the bonding fastness of the nickel-loaded carbon fiber and the PTFE powder can be obviously improved, the structural compactness of the tetrafluoro lining layer is improved, and the polytetrafluoroethylene lining layer has excellent heat resistance, strong acid and strong alkali corrosion resistance;
5. the polyetherimide and the hydroxyl silicone oil are added to play a role in thermal stabilization in the process of forming the tetrafluoro lining layer, and the improvement of the apparent quality of the tetrafluoro lining layer is facilitated.
Detailed Description
The present invention will be described in further detail with reference to examples.
PTFE powder was obtained from PTFE powder of type F-303 produced from Dajin Japan;
the carbon fiber cloth was purchased from reinforced carbon fiber cloth produced by Dongli corporation of Japan;
the chimney ash is purchased from a Jiangsu Tang power plant, and the fineness of the chimney ash is 300-350 meshes;
name (R) SiO2 Fe2O3 Al2O3 CaO MgO SO3 Others
Chimney ash 50.25 4.25 20.23 2.56 1.02 0.57 Micro-scale
The terpene phenolic resin powder is prepared by crushing 803L terpene phenolic resin sold by Jinan Dahui chemical technology Limited;
the polyetherimide powder was obtained by pulverizing 2210EPR type polyetherimide resin produced on a Saber basis.
Preparation of raw materials example one:
a PTFE powder is prepared by the following method:
(1) heating commercial PTFE powder for 4-6 h at 280-300 ℃ in advance to obtain a softened body;
(2) adjusting the shearing speed to 230-250 r/min, shearing the softened body at a high speed, and performing viscosity reduction treatment;
(3) after the softened body is naturally cooled and solidified, the softened body is crushed and sieved to prepare PTFE powder with the average grain diameter of 5 mu m.
Preparation example two of raw materials:
a nickel-loaded carbon fiber is prepared by the following method:
(1) bonding the carbon fiber cloth on the upper surface of the glass carrier, and performing ash removal treatment on the upper surface of the carbon fiber cloth;
(2) then, the glass carrier is arranged on a clamp of a vacuum chamber, and a non-ferromagnetic metal sheet is placed on the target gun;
(3) putting the nickel target on a non-ferromagnetic metal sheet, and closing the cover of the vacuum chamber;
(4) vacuum pumping is carried out in the vacuum chamber to 5 × 10-4Introducing argon into the vacuum chamber, adjusting the flow rate of the argon to be 30sccm, adjusting the pressure of the deposition chamber to 2pa, starting with sputtering power of 30w, opening the baffle plate to start deposition, and naturally cooling to room temperature after the deposition is finished to obtain a nickel film with the thickness of 5 mm;
(5) the nickel-loaded carbon fiber cloth is crushed into short carbon fibers with the average length of 10mm, and the ratio of the long diameter to the short diameter of the short carbon fibers is 10: 1.
Preparation example three of raw materials:
the anti-cracking agent is prepared by the following method:
(1) selecting 30 parts by weight of terpene phenolic resin powder, 5 parts by weight of gamma-methacryloxypropyltrimethoxysilane and 5 parts by weight of gamma-aminopropyltriethoxysilane;
(2) adding gamma-methacryloxypropyltrimethoxysilane and gamma-aminopropyltriethoxysilane into terpene phenolic resin powder, and dispersing at high speed at a rotating speed of 180 r/min.
Preparation example four of raw materials:
the anti-cracking agent is prepared by the following method:
(1) selecting 40 parts by weight of terpene phenolic resin powder, 5 parts by weight of gamma-methacryloxypropyl triisopropoxysilane and 5 parts by weight of gamma-aminopropyltriethoxysilane;
(2) adding gamma-methacryloxypropyl triisopropoxysilane and gamma-aminopropyltriethoxysilane into terpene phenolic resin powder, and dispersing at high speed of 180 r/min.
Preparation example v of raw materials:
the anti-cracking agent is prepared by the following method:
(1) selecting 50 parts by weight of terpene phenolic resin powder, 5 parts by weight of gamma-methacryloxypropyltrimethoxysilane and 5 parts by weight of gamma-aminopropyltriethoxysilane;
(2) adding gamma-methacryloxypropyltrimethoxysilane and gamma-aminopropyltriethoxysilane into terpene phenolic resin powder, and dispersing at high speed at a rotating speed of 180 r/min.
Preparation example six of raw materials:
a stabilizer is prepared by the following method:
(1) weighing 5 parts by weight of polyetherimide powder and 1 part by weight of hydroxyl silicone oil;
(2) the components are uniformly mixed.
Preparation of raw materials example seven:
a stabilizer is prepared by the following method:
(1) weighing 7 parts by weight of polyetherimide powder and 1 part by weight of hydroxyl silicone oil;
(2) the components are uniformly mixed.
Raw material preparation example eight:
a stabilizer is prepared by the following method:
(1) weighing 10 parts by weight of polyetherimide powder and 1 part by weight of hydroxyl silicone oil;
(2) the components are uniformly mixed.
The first embodiment is as follows:
a processing technology of a fluorine-lined anti-static pipeline comprises the following steps:
(1) preparing materials: weighing 70 parts of commercially available PTFE powder, 20 parts of nickel-loaded carbon fiber prepared in the second raw material preparation example, 10 parts of chimney ash, 1 part of anti-cracking agent prepared in the third raw material preparation example and 1 part of heat stabilizer prepared in the sixth raw material preparation example according to the parts by weight;
(2) uniformly mixing the components to obtain a mixture;
(3) fixing a rubber mold in a steel billet through a flange, reserving a pouring hole on the flange, injecting a mixture into a space between the rubber mold and the inner wall of the steel billet through the pouring hole, and sealing the pouring hole after the mixture is uniformly distributed;
(4) injecting water into the rubber mold until the rubber mold is tensioned, and keeping for 5 hours;
(5) and discharging water, taking out the rubber mold, placing the rubber mold into a mold, placing the mold into a sintering furnace, gradually heating to 380 ℃, gradually increasing the temperature at 5 ℃/min, preserving the heat for 1h, and naturally cooling to room temperature.
Example two:
the processing technology of the fluorine-lined anti-static pipeline is different from the first embodiment in that PTFE powder prepared in the first embodiment is selected as a raw material.
Example three:
the processing technology of the fluorine-lined anti-static pipeline is different from the second embodiment in that the anti-cracking agent is prepared by adopting the fourth raw material preparation example.
Example four:
the processing technology of the fluorine-lined anti-static pipeline is different from the second embodiment in that the anti-cracking agent is prepared by adopting the fifth raw material preparation example.
Example five:
the processing technology of the fluorine-lined antistatic pipeline is different from the second embodiment in that the stabilizer is prepared by the seventh raw material preparation example.
Example six:
the processing technology of the fluorine-lined antistatic pipeline is different from the second embodiment in that the stabilizer is prepared by adopting the eighth raw material preparation example.
Example seven:
a processing technology of a fluorine-lined anti-static pipeline is different from that of the second embodiment in the content of a pipeline formula, and 75 parts of PTFE powder prepared in the first raw material preparation example, 25 parts of nickel-loaded carbon fiber prepared in the second raw material preparation example, 12 parts of chimney ash, 2 parts of anti-cracking agent prepared in the third raw material preparation example and 2 parts of heat stabilizer prepared in the sixth raw material preparation example are weighed according to parts by weight.
Example eight:
the processing technology of the fluorine-lined antistatic pipeline is different from that of the second embodiment in the content of a pipeline formula, and 80 parts by weight of PTFE powder prepared in the first raw material preparation example, 30 parts by weight of nickel-loaded carbon fiber prepared in the second raw material preparation example, 15 parts by weight of chimney ash, 3 parts by weight of anti-cracking agent prepared in the third raw material preparation example and 3 parts by weight of heat stabilizer prepared in the sixth raw material preparation example are weighed.
Comparative example one:
the processing technology of the fluorine-lined anti-static pipeline is different from that of the first embodiment in that the pipeline formula is different, 70 parts of PTFE powder and 30 parts of conductive carbon black are weighed according to parts by weight, and the rest is different from that of the first embodiment.
Comparative example two:
the processing technology of the fluorine-lined antistatic pipeline is different from the first embodiment in that chimney ash is not added.
Comparative example three:
the processing technology of the fluorine-lined anti-static pipeline is different from the first embodiment in that the nickel-loaded carbon fiber is not added.
Comparative example four:
the processing technology of the fluorine-lined anti-static pipeline is different from the first embodiment in that the anti-cracking agent is absent.
Comparative example five:
the processing technology of the fluorine-lined anti-static pipeline is different from the first embodiment in that the anti-cracking agent is terpene phenolic resin alone.
Comparative example six:
the processing technology of the fluorine-lined anti-static pipeline is different from the first embodiment in that the anti-cracking agent is compounded by adopting terpene phenolic resin and vinyl triethoxysilane according to the weight ratio of 3: 1.
Comparative example seven:
a processing technology of a fluorine-lined antistatic pipeline is different from that of the first embodiment in that a heat stabilizer is absent.
Comparative example eight:
the processing technology of the fluorine-lined antistatic pipeline is different from the first embodiment in that polyetherimide powder is adopted as a heat stabilizer.
The detection means is as follows:
(1) antistatic property: the tetrafluoro linings of the examples and the comparative examples one, two and three were subjected to an antistatic test using a surface resistance tester, and the tetrafluoro lining was cut into samples having a length of 10cm and a width of 4cm, in units of M.OMEGA.cm;
(2) heat resistance, acid and alkali corrosion resistance: the pipelines prepared in the examples and the comparative examples are tested for heat resistance, acid and alkali corrosion resistance, a strong acid corrosive liquid and a strong alkaline corrosive liquid with the temperature of about 180 ℃ are respectively pumped into a pipeline sample, the pH value of the strong acid corrosive liquid is about 3, the pH value of the strong alkaline corrosive liquid is about 12, the strong alkaline corrosive liquid and the strong alkaline corrosive liquid are respectively kept for 2h, and the condition of the inner wall of the pipeline is observed.
The results of the antistatic test are shown in the following table:
Figure BDA0002413362980000081
Figure BDA0002413362980000091
as can be seen from the above table, the sample of the embodiment of the present application has excellent antistatic property, and when the conveying exhaust gas is conveyed in the pipeline, the static electricity can be immediately led out, so as to achieve a good antistatic effect, while the comparative example i in the prior art, which adopts carbon black as the conductive filler, can dredge the static electricity, but the antistatic effect is inferior to the sample of the embodiment of the present application; and compared example two of adding nickel-carrying carbon fiber as the conductive filler alone, the dredging effect to static is inferior to the sample of compared example one, compared example three of adding chimney ash alone, the antistatic property is poorer, it is difficult to dredge static, there is hidden danger in use.
The results of the detection of the hot acid and alkali corrosion resistance are shown in the following table:
Figure BDA0002413362980000092
Figure BDA0002413362980000101
as can be seen from the above table, the inner wall of the pipeline prepared in the embodiment of the application is intact and flawless, and after the test of high-temperature strong acid corrosive liquid and strong base corrosive liquid, the surface of the inner wall of the pipeline is still intact and flawless, so that the pipeline has excellent heat-resistant acid-base corrosion resistance; in the prior art, the conductive pipeline which adopts conductive carbon black as conductive filler has poor corrosion resistance to heat, strong acid and strong base; the sample lacking the anti-cracking agent and the stabilizing agent has ripples on the surface of the formed tetrafluoro lining layer, and the heat resistance, strong acid and strong base corrosion are weaker; if the anti-cracking agent is independently terpene phenolic resin without adding a silane coupling agent, after the test of heat-resistant strong acid and strong base, the inner wall surface of the pipeline is corrugated, which shows that the binding property of the anti-cracking agent with PTFE powder, nickel-loaded carbon fiber and chimney ash is poor, and the heat-resistant strong acid and the strong base of the molded PTFE lining layer are inferior to those of the samples in the examples; the polyether imide and the hydroxyl silicone oil are added, which is helpful for improving the surface texture of the formed tetrafluoro lining.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (5)

1. The fluorine-lined anti-static pipeline comprises a main pipe and a tetrafluoro lining layer lined on the inner wall of the main pipe, and is characterized in that the tetrafluoro lining layer comprises the following components in parts by weight: 70-80 parts of PTFE powder, 20-30 parts of nickel-loaded carbon fiber, 10-15 parts of chimney ash, 1-3 parts of anti-cracking agent and 1-3 parts of heat stabilizer;
the anti-cracking agent is a composition of terpene phenolic resin powder and a silane coupling agent compounded in a weight ratio of (3-5) to 1;
the silane coupling agent is a composition of an acyloxy-containing silane coupling agent and an amino-containing silane coupling agent which are compounded in a weight ratio of 1: 1;
the heat stabilizer is selected from the following components in parts by weight (5-10): 1 composite of compounded polyetherimide powder and hydroxyl silicone oil;
the chemical composition (%) of the stack ash is shown in the following table:
1. name (R) 2．SiO2 3．Fe2O3 4．Al2O3 5．CaO 6．MgO 7．SO3 8. Others 9. Chimney ash 10．50.25 11．4.25 12．20.23 13．2.56 14．1.02 15．0.57 16. Micro-meterMeasurement of
。
2. The fluorine-lined antistatic pipe as claimed in claim 1, wherein: heating the PTFE powder at 280-300 ℃ for 4-6 hours in advance to obtain a softened body; and adjusting the shearing rotating speed to 230-250 r/min, and shearing the softened body at a high speed to perform viscosity reduction treatment.
3. The fluorine-lined antistatic pipe as claimed in claim 1, wherein: the nickel-loaded carbon fiber is prepared by plating a nickel film on the surface of carbon fiber cloth in a magnetron sputtering mode, then crushing the nickel-loaded carbon fiber cloth into short nickel-loaded carbon fiber with the length of 8-10 mm, wherein the ratio of the long diameter to the short diameter of the short nickel-loaded carbon fiber is (8-10): 1.
4. The fluorine-lined antistatic pipe as claimed in claim 1, wherein: the fineness of the chimney ash is 800-1000 meshes.
5. The processing technology of the fluorine-lined antistatic pipeline as claimed in any one of claims 1 to 4, characterized by comprising the following steps:
(1) preparing materials: weighing 70-80 parts of PTFE powder, 20-30 parts of nickel-loaded carbon fiber, 10-15 parts of chimney ash, 1-3 parts of anti-cracking agent and 1-3 parts of heat stabilizer according to parts by weight;
(2) uniformly mixing the components to obtain a mixture;
(3) fixing a rubber mold in a steel billet through a flange, reserving a pouring hole on the flange, injecting a mixture into a space between the rubber mold and the inner wall of the steel billet through the pouring hole, and sealing the pouring hole after the mixture is uniformly distributed;
(4) injecting water into the rubber mold until the rubber mold is tensioned, and keeping for 2-10 hours;
(5) and discharging water, taking out the rubber mold, placing the rubber mold into a mold, placing the mold into a sintering furnace, gradually heating to 380 ℃, gradually increasing the temperature at 5 ℃/min, preserving the heat for 1h, and naturally cooling to room temperature.
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CN1963277B (en) * 2006-11-14 2010-12-29 余成珍 Method for fabricating pipeline with lining made of tetrafluoro materials
CN106280150B (en) * 2016-08-16 2018-08-31 浙江特塑龙化工设备有限公司 A kind of pipeline of lining teflon
CN110283420A (en) * 2019-07-31 2019-09-27 黄山华塑新材料科技有限公司 A kind of counter-bending, antiskid, Antistatic type Wood plastic composite and preparation method thereof

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