CN113480816B - Preparation method and application of high-oil-resistance polytetrafluoroethylene composite material - Google Patents
Preparation method and application of high-oil-resistance polytetrafluoroethylene composite material Download PDFInfo
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- CN113480816B CN113480816B CN202110642521.7A CN202110642521A CN113480816B CN 113480816 B CN113480816 B CN 113480816B CN 202110642521 A CN202110642521 A CN 202110642521A CN 113480816 B CN113480816 B CN 113480816B
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- polytetrafluoroethylene
- oil
- composite material
- piperidine ring
- organic matter
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- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
- C08K5/3432—Six-membered rings
- C08K5/3435—Piperidines
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a preparation method of a high oil-resistant polytetrafluoroethylene composite material, which comprises the steps of blending an organic matter containing a piperidine ring and polytetrafluoroethylene, carrying out compression molding and high-temperature sintering to obtain the high oil-resistant polytetrafluoroethylene composite material, wherein the high oil-resistant polytetrafluoroethylene composite material can be used as a main material of an oil delivery pipe. According to the invention, the organic matter containing the piperidine ring is blended with the polytetrafluoroethylene, the introduction of the piperidine ring strengthens intermolecular force, the polytetrafluoroethylene is endowed with good mechanical property, and meanwhile, the oil resistance of the polytetrafluoroethylene at high temperature can be improved, tests show that the polytetrafluoroethylene can work at 150 ℃ for more than 500 hours without oil leakage, the use requirements of the polytetrafluoroethylene in the high temperature field can be well met, and the reliability of the product is improved.
Description
Technical Field
The invention belongs to the field of composite materials, and particularly relates to a preparation method and application of a high-oil-resistance polytetrafluoroethylene composite material at a high temperature.
Background
Polytetrafluoroethylene has excellent chemical stability, corrosion resistance, sealability, high lubricity, non-oiliness, electrical insulation and good aging resistance, and is called "plastic king". In the field of automobile parts, polytetrafluoroethylene has many applications such as oil pipelines and the like. However, the oil resistance of the polytetrafluoroethylene material at high temperature is insufficient, and tests show that: an oil delivery pipe prepared from polytetrafluoroethylene materials at 150 ℃ can leak oil after working for 200 hours, so that the reliability of the product is greatly influenced, and the application of the oil delivery pipe in a high-temperature device is also influenced.
However, the existing methods for modifying polytetrafluoroethylene to improve the performance of polytetrafluoroethylene usually use polytetrafluoroethylene materials as base materials, and add glass fibers, flame retardants, etc. to change or enhance the performance of polytetrafluoroethylene materials, however, these modification methods have no obvious effect on improving the oil resistance of polytetrafluoroethylene at high temperature. And no relevant research is carried out on improving the oil resistance of the polytetrafluoroethylene at high temperature.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects and shortcomings in the background art and provide a preparation method and application of a high-oil-resistance polytetrafluoroethylene composite material at high temperature.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a preparation method of a high oil-resistant polytetrafluoroethylene composite material comprises the steps of mixing an organic matter containing piperidine rings and polytetrafluoroethylene, carrying out compression molding, and carrying out high-temperature sintering to obtain the high oil-resistant polytetrafluoroethylene composite material.
In the above preparation method, preferably, the organic substance containing a piperidine ring has the formula
Wherein, R is any one of hydrogen radical, methyl, ethyl, propyl and phenyl.
In the preparation method, preferably, the addition amount of the organic matter containing a piperidine ring accounts for 6-13% of the total mass of the organic matter containing a piperidine ring and polytetrafluoroethylene.
Preferably, the preparation method comprises the following specific processes: and (2) crushing polytetrafluoroethylene, adding an organic matter containing piperidine ring, mixing, carrying out compression molding on the obtained mixture, then carrying out heat preservation in a sintering furnace at 300-350 ℃ for 3-6 h, and slowly cooling to obtain the high oil-resistant polytetrafluoroethylene composite material.
As a general inventive concept, the invention also provides an application of the high oil-resistant polytetrafluoroethylene composite material prepared by the preparation method in oil pipe materials.
Compared with the prior art, the invention has the advantages that:
(1) according to the invention, the organic matter containing the piperidine ring is blended with the polytetrafluoroethylene, the introduction of the piperidine ring strengthens intermolecular force, the polytetrafluoroethylene is endowed with good mechanical property, and meanwhile, the oil resistance of the polytetrafluoroethylene at high temperature can be improved, tests show that the polytetrafluoroethylene can work at 150 ℃ for more than 500 hours without oil leakage, the use requirements of the polytetrafluoroethylene in the high temperature field can be well met, and the reliability of the product is improved.
(2) The high oil-resistant polytetrafluoroethylene composite material can be used as a main material of an oil delivery pipe.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1:
the preparation method of the high oil-resistant polytetrafluoroethylene composite material comprises the following steps:
(1) drying polytetrafluoroethylene at the temperature of 25 ℃, and then crushing;
(2) weighing organic matter 6-methyl-1, 3, 5-triazine-2, 4 diamine containing piperidine ring and crushed polytetrafluoroethylene, stirring and mixing uniformly, and screening to obtain a mixture; wherein the organic matter containing piperidine ring accounts for 6% of the total mass of the organic matter containing piperidine ring and polytetrafluoroethylene, and the molecular formula of the organic matter containing piperidine ring is
(3) And carrying out compression molding on the obtained mixture to obtain a blank, then placing the blank into a sintering furnace, keeping the temperature for 4h at 320 ℃, and slowly cooling to obtain the high oil-resistant polytetrafluoroethylene composite material.
The prepared polytetrafluoroethylene composite material product is used as a raw material to prepare an oil delivery pipe, and the mechanical properties of the oil delivery pipe are shown in Table 1. Experiments show that the oil pipeline can work for 500 hours at 150 ℃ without oil leakage.
Example 2:
the preparation method of the high oil-resistant polytetrafluoroethylene composite material comprises the following steps:
(1) keeping the temperature of polytetrafluoroethylene at 25 ℃, and then crushing;
(2) weighing organic matter 6-methyl-1, 3, 5-triazine-2, 4 diamine containing piperidine ring and crushed polytetrafluoroethylene, stirring and mixing uniformly at a high speed, and screening to obtain a mixture; wherein the organic matter containing piperidine ring accounts for 10% of the total mass, and the molecular formula of the organic matter containing piperidine ring is
(3) And carrying out compression molding on the obtained mixture to obtain a blank, then putting the blank into a sintering furnace, keeping the temperature for 4h at 330 ℃, and slowly cooling to obtain the high oil-resistant polytetrafluoroethylene composite material.
The prepared polytetrafluoroethylene composite material product is used as a raw material to prepare an oil delivery pipe, and is shown in table 1. Tests show that the oil pipeline can work for 700 hours at 150 ℃ without oil leakage.
Example 3:
the preparation method of the high oil-resistant polytetrafluoroethylene composite material comprises the following steps:
(1) keeping the temperature of polytetrafluoroethylene at 25 ℃, and then crushing;
(2) weighing organic matter 1,3, 5-triazine-2, 4 diamine containing piperidine ring and crushed polytetrafluoroethylene, stirring and mixing uniformly at a high speed, and screening to obtain a mixture; wherein the organic matter containing piperidine ring accounts for 13% of the total mass, and the molecular formula of the organic matter containing piperidine ring is
(3) And carrying out compression molding on the obtained mixture to obtain a blank, then putting the blank into a sintering furnace, keeping the temperature for 5 hours at 340 ℃, and slowly cooling to obtain the high oil-resistant polytetrafluoroethylene composite material.
The prepared polytetrafluoroethylene composite material product was used as a raw material to prepare an oil pipeline, and the results are shown in table 1. Tests show that the oil pipeline can work for 800 hours at 150 ℃ without oil leakage.
TABLE 1 comparison of mechanical Properties of conventional oil pipes made of PTFE with those of the oil pipes made of PTFE prepared in examples
Note: the conventional oil pipe soaking oil in Table 1 is soaked at 150 ℃ for 200h, the oil soaking in example 1 is soaked at 150 ℃ for 500h, the oil soaking in example 2 is soaked at 150 ℃ for 700h, the oil soaking in example 3 is soaked at 150 ℃ for 800h, and the tensile strength is measured according to GB/T1040.1-2018.
Claims (3)
1. A preparation method of a high oil-resistant polytetrafluoroethylene composite material is characterized in that organic matter containing a piperidine ring and polytetrafluoroethylene are blended, compression molding is conducted, and high-temperature sintering is conducted to obtain the high oil-resistant polytetrafluoroethylene composite material, wherein the addition amount of the organic matter containing the piperidine ring accounts for 6% -13% of the total mass of the organic matter containing the piperidine ring and the polytetrafluoroethylene;
the molecular formula of the organic matter containing piperidine ring is
Wherein, R is any one of hydrogen radical, methyl, ethyl, propyl and phenyl.
2. The preparation method according to claim 1, wherein the specific process of the preparation method is as follows: and (2) crushing polytetrafluoroethylene, adding an organic matter containing piperidine ring, mixing, carrying out compression molding on the mixture, then carrying out heat preservation for 3-6 h at 300-350 ℃ in a sintering furnace, and cooling to obtain the high oil-resistant polytetrafluoroethylene composite material.
3. Use of the high oil resistant polytetrafluoroethylene composite prepared by the preparation method of any one of claims 1-2 in oil pipe materials.
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| CN202110642521.7A CN113480816B (en) | 2021-06-09 | 2021-06-09 | Preparation method and application of high-oil-resistance polytetrafluoroethylene composite material |
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| CN202110642521.7A CN113480816B (en) | 2021-06-09 | 2021-06-09 | Preparation method and application of high-oil-resistance polytetrafluoroethylene composite material |
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| CN113480816B true CN113480816B (en) | 2022-08-16 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2028227A1 (en) * | 2007-08-22 | 2009-02-25 | Clariant International Ltd. | Flame-resistant plastic moulding material |
| CN107345039A (en) * | 2017-05-17 | 2017-11-14 | 安徽绿环泵业有限公司 | A kind of pump high-performance polytetrafluoroethyl material |
| CN112805323A (en) * | 2018-08-15 | 2021-05-14 | 化学制造布敦海姆两合公司 | Polymer compositions with phosphonate flame retardants |
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- 2021-06-09 CN CN202110642521.7A patent/CN113480816B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2028227A1 (en) * | 2007-08-22 | 2009-02-25 | Clariant International Ltd. | Flame-resistant plastic moulding material |
| CN107345039A (en) * | 2017-05-17 | 2017-11-14 | 安徽绿环泵业有限公司 | A kind of pump high-performance polytetrafluoroethyl material |
| CN112805323A (en) * | 2018-08-15 | 2021-05-14 | 化学制造布敦海姆两合公司 | Polymer compositions with phosphonate flame retardants |
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