CN109251448A - A kind of teflon valve sealing material preparation method - Google Patents
A kind of teflon valve sealing material preparation method Download PDFInfo
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- CN109251448A CN109251448A CN201810979165.6A CN201810979165A CN109251448A CN 109251448 A CN109251448 A CN 109251448A CN 201810979165 A CN201810979165 A CN 201810979165A CN 109251448 A CN109251448 A CN 109251448A
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- sealing material
- polytetrafluoroethylene
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/003—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/006—Pressing and sintering powders, granules or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of teflon valve sealing material preparation method, the teflon valve sealing material rebound degrees with higher and compression ratio of preparation, while its creep relaxation rate, slip are lower, and creep-resistant property, sealing performance are preferable.Surface is carried out to graphene using polytetrafluoroethylene (PTFE) and cyclohexene to be modified, can increase the compatibility of graphene and polytetrafluoroethylene fibre, and the two synergistic effect realizes the stacking of space three-dimensional, helps to improve the compression recovery performance of target material；Nano silica is generated in graphene and polytetrafluoroethylene (PTFE) gap using tetraethyl orthosilicate, on the one hand graphene is combined with polytetrafluoroethylene fibre, further enhance the compression recovery performance of target material, on the other hand, the presence of nano silica also improves the creep-resistant property of material, it prolongs its service life, keeps its leakproofness good.
Description
Technical field
The invention belongs to valve seal field of material technology, especially a kind of teflon valve sealing material preparation side
Method.
Background technique
Since polytetrafluoroethylene (PTFE) has the good characteristics such as high temperature resistant, ageing-resistant, resistant to chemical etching, usually as gasket seal
At pipeline connection or valve for the industry productions process such as petrochemical industry, biological medicine and food, to play the anti-stopping leak of sealing
The effect of leakage, unique advantage be other materials it is incomparable.
But polytetrafluoroethylene (PTFE) as sealing gasket for valve when used for a long time, there is also creep-resistant properties, sealing performance
Not good enough problem.
Summary of the invention
In view of the above-mentioned problems, the present invention is intended to provide a kind of preferable polytetrafluoroethylene (PTFE) valve of creep-resistant property, sealing performance
Door sealing material preparation method.
The invention is realized by the following technical scheme:
A kind of teflon valve sealing material preparation method, which comprises the following steps:
(1) 5-6 part graphene in parts by weight is placed in resistance furnace, 130-140min is sintered at 420-425 DEG C, so
It is cooled to room temperature, is placed into the surface treating agent of 5-10 times of its volume with the rate of 4-6 DEG C/min afterwards, ultrasound impregnates 1-2h
After be transferred at -7~-10 DEG C and freeze 3-5h, be then transferred at 120-130 DEG C and handle 2-4h, then carry out ultrasound and impregnate 1-2h, follow
Ring above-mentioned processing 3-4 times, it is finally dry at 130-134 DEG C；
(2) step (1) gains and 10-20 parts of polytetrafluoroethylene fibres are put into mixing machine, 30-50 parts of isopropanols are added,
20-30min is mixed at 300-400min, is then dried at 70-75 DEG C, its volume 5- is then added it to
In 12 times of teos solution, stir process 30-40min, is then slowly added dropwise 1-3 at 60-62 DEG C, 200-300rpm
Part dilute hydrochloric acid solution, is transferred to 40-43 DEG C, 6-7h is reacted under the conditions of 300-400rpm after being added dropwise, then quiet at 30-35 DEG C
2-3h is set, is filtered, after deionized water is rinsed 2-3 times, is dried at 200-204 DEG C；
(3) 80-100 parts of polytetrafluorethylepowder powders, step (2) gains are added in the aqueous isopropanol of 2-3 times of its volume,
It filters and is placed it in drying box after being ultrasonically treated 30-40min using 102-105Hz at 10-12 DEG C, at 102-103 DEG C
Lower dry 25-30h.
(4) step (3) gains are added in mold, then the compression moulding on vulcanizing press puts gains
Enter in resistance furnace, is warming up to 230-235 DEG C, pressure 0.12-0.13MPa with the rate of 3-4 DEG C/min, constant temperature and pressure is sintered 2-
2.5 h, same rate are then warming up to 300-304 DEG C, and pressure regulation to -0.08~-0.09 MPa, constant temperature and pressure is sintered 1-2h, so
After be continuously heating to 325-330 DEG C, pressure regulation to 0.11-0.2MPa is sintered 2-3h, is finally cooled to the rate of 1-2 DEG C/min
Room temperature is bled off pressure.
Further, step (1) described surface treating agent is polytetrafluoroethylene (PTFE), cyclohexene mixed emulsion, solid content
For 15-18%, polytetrafluoroethylene (PTFE) and cyclohexene mass ratio are 10:0.3-0.5.
Further, step (1) ultrasound condition is 45-55Hz.
Further, the mass fraction of step (2) described teos solution is 12-14%.
Further, step (2) the dilute hydrochloric acid solution mass fraction is 3-4%.
Beneficial effects of the present invention: teflon valve sealing material rebound degree with higher prepared by the present invention and
Compression ratio, while its creep relaxation rate, slip are lower, creep-resistant property, sealing performance are preferable.Graphene is put into resistance furnace
In be sintered, so that graphene surface is distributed a large amount of micropore, to increase the specific surface area of graphene, then utilize polytetrafluoroethyl-ne
Alkene and cyclohexene carry out surface to graphene and are modified, and make its absorption film-forming on the surface of graphene, can increase graphene and poly- four
The compatibility of vinyl fluoride fiber is uniformly mixed it, and synergistic effect realizes the stacking of space three-dimensional, helps to improve target material
The compression recovery performance of material；Nano silica is generated in graphene and polytetrafluoroethylene (PTFE) gap using tetraethyl orthosilicate, one
Aspect makes graphene combine with polytetrafluoroethylene fibre, further enhances the compression recovery performance of target material,
On the other hand, the presence of nano silica also improves the creep-resistant property of material, prolongs its service life, and makes its leakproofness
Well.Polytetrafluoroethylene fibre is handled using isopropanol, enhances its toughness, while facilitating polytetrafluoroethylene fibre
It is evenly dispersed, less stress concentration point, reinforcing material mechanical property；In material sintering process, agglomerant is divided using segmentation
Skill so that each component is close, uniformly in material, fiber intertwine with each other, it is airtight, waterproof, anti-leak is functional, significantly
Improve the sealing performance of material.
Specific embodiment
Illustrate the present invention with specific embodiment below, but is not limitation of the present invention.
Embodiment 1
A kind of teflon valve sealing material preparation method, which comprises the following steps:
(1) 5 parts of graphenes in parts by weight are placed in resistance furnace, 130min are sintered at 420 DEG C, then with 4 DEG C/
The rate of min is cooled to room temperature, and is placed into the surface treating agent of 5 times of its volume, is transferred to after ultrasound immersion 1h cold at -7 DEG C
Freeze 3h, be then transferred at 120 DEG C and handle 2h, then carry out ultrasound and impregnate 1h, recycles above-mentioned processing 3 times, finally done at 130 DEG C
It is dry；
(2) step (1) gains and 10 parts of polytetrafluoroethylene fibres are put into mixing machine, 30 parts of isopropanols is added,
20min is mixed under 300min, is then dried at 70 DEG C, and the positive silicic acid second of 5 times of its volume is then added it to
In ester solution, then 1 part of dilute hydrochloric acid solution is slowly added dropwise in the stir process 30min at 60 DEG C, 200rpm, turns after being added dropwise
Enter 40 DEG C, 6h is reacted under the conditions of 300rpm, 2h is then stood at 30 DEG C, filter, after deionized water is rinsed 2 times, at 200 DEG C
Drying；
(3) 80 parts of polytetrafluorethylepowder powders, step (2) gains are added in the aqueous isopropanol of 2 times of its volume, at 10 DEG C
It filters and is placed it in drying box after the lower 30min using 102Hz ultrasonic treatment, the dry 25h at 102 DEG C.
(4) step (3) gains are added in mold, then the compression moulding on vulcanizing press puts gains
Enter in resistance furnace, is warming up to 230 DEG C, pressure 0.12MPa with the rate of 3 DEG C/min, constant temperature and pressure is sintered 2 h, same rate
Then 300 DEG C are warming up to, pressure regulation to -0.08 MPa, constant temperature and pressure is sintered 1h, then proceedes to be warming up to 325 DEG C, pressure regulation is extremely
0.11MPa is sintered 2h, is finally cooled to room temperature, is bled off pressure with the rate of 1 DEG C/min.
Further, step (1) described surface treating agent is polytetrafluoroethylene (PTFE), cyclohexene mixed emulsion, solid content
It is 15%, polytetrafluoroethylene (PTFE) and cyclohexene mass ratio are 10:0.3.
Further, step (1) ultrasound condition is 45Hz.
Further, the mass fraction of step (2) described teos solution is 12%.
Further, step (2) the dilute hydrochloric acid solution mass fraction is 3%.
Embodiment 2
A kind of teflon valve sealing material preparation method, which comprises the following steps:
(1) 6 parts of graphenes in parts by weight are placed in resistance furnace, 135min are sintered at 422 DEG C, then with 5 DEG C/
The rate of min is cooled to room temperature, and is placed into the surface treating agent of 7 times of its volume, is transferred to after ultrasound immersion 2h cold at -8 DEG C
Freeze 4h, be then transferred at 125 DEG C and handle 3h, then carry out ultrasound and impregnate 2h, recycles above-mentioned processing 4 times, finally done at 132 DEG C
It is dry；
(2) step (1) gains and 15 parts of polytetrafluoroethylene fibres are put into mixing machine, 40 parts of isopropanols is added,
25min is mixed under 350min, is then dried at 72 DEG C, and the positive silicic acid second of 8 times of its volume is then added it to
In ester solution, then 2 parts of dilute hydrochloric acid solutions are slowly added dropwise in the stir process 35min at 61 DEG C, 250rpm, turn after being added dropwise
Enter 41 DEG C, 7h is reacted under the conditions of 350rpm, 3h is then stood at 32 DEG C, filter, after deionized water is rinsed 3 times, at 202 DEG C
Drying；
(3) 90 parts of polytetrafluorethylepowder powders, step (2) gains are added in the aqueous isopropanol of 3 times of its volume, at 11 DEG C
It filters and is placed it in drying box after the lower 35min using 103Hz ultrasonic treatment, the dry 27h at 103 DEG C.
(4) step (3) gains are added in mold, then the compression moulding on vulcanizing press puts gains
Enter in resistance furnace, is warming up to 232 DEG C, pressure 0.12MPa with the rate of 4 DEG C/min, constant temperature and pressure is sintered 2.1h, same rate
Then 302 DEG C are warming up to, pressure regulation to -0.085MPa, constant temperature and pressure is sintered 1.5h, then proceedes to be warming up to 327 DEG C, pressure regulation is extremely
0.15MPa is sintered 2.5h, is finally cooled to room temperature, is bled off pressure with the rate of 1.5 DEG C/min.
Further, step (1) described surface treating agent is polytetrafluoroethylene (PTFE), cyclohexene mixed emulsion, solid content
It is 16%, polytetrafluoroethylene (PTFE) and cyclohexene mass ratio are 10:0.4.
Further, step (1) ultrasound condition is 50Hz.
Further, the mass fraction of step (2) described teos solution is 13%.
Further, step (2) the dilute hydrochloric acid solution mass fraction is 4%.
Embodiment 3
A kind of teflon valve sealing material preparation method, which comprises the following steps:
(1) 6 parts of graphenes in parts by weight are placed in resistance furnace, 140min are sintered at 425 DEG C, then with 6 DEG C/
The rate of min is cooled to room temperature, and is placed into the surface treating agent of 10 times of its volume, and ultrasound is transferred at -10 DEG C after impregnating 2h
5h is freezed, is then transferred at 130 DEG C and handles 4h, then carries out ultrasound and impregnates 2h, above-mentioned processing 4 times is recycled, finally at 134 DEG C
It is dry；
(2) step (1) gains and 20 parts of polytetrafluoroethylene fibres are put into mixing machine, 50 parts of isopropanols is added,
30min is mixed under 400min, is then dried at 75 DEG C, and the positive silicic acid second of 12 times of its volume is then added it to
In ester solution, then 3 parts of dilute hydrochloric acid solutions are slowly added dropwise in the stir process 40min at 62 DEG C, 300rpm, turn after being added dropwise
Enter 43 DEG C, 7h is reacted under the conditions of 400rpm, 3h is then stood at 35 DEG C, filter, after deionized water is rinsed 3 times, at 204 DEG C
Drying；
(3) 100 parts of polytetrafluorethylepowder powders, step (2) gains are added in the aqueous isopropanol of 3 times of its volume, 12
It filters and is placed it in drying box after being ultrasonically treated 40min using 105Hz at DEG C, the dry 30h at 103 DEG C.
(4) step (3) gains are added in mold, then the compression moulding on vulcanizing press puts gains
Enter in resistance furnace, is warming up to 235 DEG C, pressure 0.13MPa with the rate of 4 DEG C/min, constant temperature and pressure is sintered 2.5 h, same speed
Rate is then warming up to 304 DEG C, and pressure regulation to -0.09 MPa, constant temperature and pressure is sintered 2h, then proceedes to be warming up to 330 DEG C, pressure regulation is extremely
0.2MPa is sintered 3h, is finally cooled to room temperature, is bled off pressure with the rate of 2 DEG C/min.
Further, step (1) described surface treating agent is polytetrafluoroethylene (PTFE), cyclohexene mixed emulsion, solid content
It is 18%, polytetrafluoroethylene (PTFE) and cyclohexene mass ratio are 10:0.5.
Further, step (1) ultrasound condition is 55Hz.
Further, the mass fraction of step (2) described teos solution is 14%.
Further, step (2) the dilute hydrochloric acid solution mass fraction is 4%.
Comparative example 1
The addition of surface treating agent is omitted compared to embodiment 2 in this comparative example, and method and step in addition to this is homogeneous
Together.
Comparative example 2
The addition of step (2) isopropanol is omitted compared to embodiment 2 in this comparative example, and method and step in addition to this is equal
It is identical.
Comparative example 3
The addition of step (2) teos solution, side in addition to this is omitted compared to embodiment 2 in this comparative example
Method step is all the same.
Comparative example 4
This comparative example replaces with direct sintering compared to embodiment 2, by step (4) sintering operation, i.e., " is put into resistance furnace
In, 327 DEG C are warming up to the rate of 4 DEG C/min, it is homogeneous to be sintered the method and step of 2.5h " in addition to this for pressure regulation to 0.15MPa
Together.
Performance test:
Using compression rebound instrument, according to 12622 standard of ASTM F36 and GB/T to sample obtained by each embodiment and comparative example
Compression ratio and rebound degree tested.
According to ASTM F38-B to each embodiment and comparative example croop property, the slip of sample survey
Examination.
Meanwhile the tensile property of each sample is tested.
Test result is as shown in table 1:
Table 1
| Rebound degree (%) | Compression ratio (%) | Creep relaxation rate (%) | Slip (%) | |
| Embodiment 1 | 15.8 | 47.1 | 7.2 | 0.010*10-4 |
| Embodiment 2 | 16.1 | 50.8 | 7.1 | 0.008*10-4 |
| Embodiment 3 | 15.7 | 47.4 | 7.1 | 0.009*10-4 |
| Comparative example 1 | 10.2 | 32.7 | 14.8 | 0.016*10-4 |
| Comparative example 2 | 10.4 | 31.5 | 15.2 | 0.018*10-4 |
| Comparative example 3 | 9.5 | 24.1 | 19.3 | 0.019*10-4 |
| Comparative example 4 | 8.6 | 20.8 | 18.7 | 0.034*10-4 |
As can be seen from Table 1, teflon valve sealing material prepared by the present invention rebound degree with higher and compression ratio,
Its creep relaxation rate, slip are lower simultaneously, and creep-resistant property, sealing performance are preferable.
Claims (5)
1. a kind of teflon valve sealing material preparation method, which comprises the following steps:
(1) 5-6 part graphene in parts by weight is placed in resistance furnace, 130-140min is sintered at 420-425 DEG C, so
It is cooled to room temperature, is placed into the surface treating agent of 5-10 times of its volume with the rate of 4-6 DEG C/min afterwards, ultrasound impregnates 1-2h
After be transferred at -7~-10 DEG C and freeze 3-5h, be then transferred at 120-130 DEG C and handle 2-4h, then carry out ultrasound and impregnate 1-2h, follow
Ring above-mentioned processing 3-4 times, it is finally dry at 130-134 DEG C；
(2) step (1) gains and 10-20 parts of polytetrafluoroethylene fibres are put into mixing machine, 30-50 parts of isopropanols are added,
20-30min is mixed at 300-400min, is then dried at 70-75 DEG C, its volume 5- is then added it to
In 12 times of teos solution, stir process 30-40min, is then slowly added dropwise 1-3 at 60-62 DEG C, 200-300rpm
Part dilute hydrochloric acid solution, is transferred to 40-43 DEG C, 6-7h is reacted under the conditions of 300-400rpm after being added dropwise, then quiet at 30-35 DEG C
2-3h is set, is filtered, after deionized water is rinsed 2-3 times, is dried at 200-204 DEG C；
(3) 80-100 parts of polytetrafluorethylepowder powders, step (2) gains are added in the aqueous isopropanol of 2-3 times of its volume,
It filters and is placed it in drying box after being ultrasonically treated 30-40min using 102-105Hz at 10-12 DEG C, at 102-103 DEG C
Lower dry 25-30h.
(4) step (3) gains are added in mold, then gains are put into electricity by the compression moulding on vulcanizing press
It hinders in furnace, is warming up to 230-235 DEG C, pressure 0.12-0.13MPa with the rate of 3-4 DEG C/min, constant temperature and pressure is sintered 2-2.5
H, same rate are then warming up to 300-304 DEG C, and pressure regulation to -0.08~-0.09 MPa, constant temperature and pressure is sintered 1-2h, then after
Continuous to be warming up to 325-330 DEG C, pressure regulation to 0.11-0.2MPa is sintered 2-3h, is finally cooled to room temperature with the rate of 1-2 DEG C/min,
It bleeds off pressure.
2. a kind of teflon valve sealing material preparation method according to claim 1, which is characterized in that step
(1) surface treating agent is polytetrafluoroethylene (PTFE), cyclohexene mixed emulsion, solid content 15-18%, polytetrafluoroethylene (PTFE) with
Cyclohexene mass ratio is 10:0.3-0.5.
3. a kind of teflon valve sealing material preparation method according to claim 1, which is characterized in that step
(1) ultrasound condition is 45-55Hz.
4. a kind of teflon valve sealing material preparation method according to claim 1, which is characterized in that step
(2) mass fraction of the teos solution is 12-14%.
5. a kind of teflon valve sealing material preparation method according to claim 1, which is characterized in that step
(2) the dilute hydrochloric acid solution mass fraction is 3-4%.
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| CN201810979165.6A CN109251448A (en) | 2018-08-27 | 2018-08-27 | A kind of teflon valve sealing material preparation method |
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| CN201810979165.6A CN109251448A (en) | 2018-08-27 | 2018-08-27 | A kind of teflon valve sealing material preparation method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649860A (en) * | 2012-04-24 | 2012-08-29 | 浙江大学 | Graphene/PTFE (Polytetrafluoroethylene) nanometer compound material and preparation method thereof |
| WO2014014590A1 (en) * | 2012-07-16 | 2014-01-23 | Baker Hughes Incorporated | High glass transition temperature thermoset and method of making the same |
| CN106012525A (en) * | 2016-06-22 | 2016-10-12 | 华东理工大学 | Super-hydrophobic modification method for polytetrafluoroethylene (PTTE) fibers applied to oily sewage treatment |
| CN107400278A (en) * | 2017-08-12 | 2017-11-28 | 安徽英科成流体科技有限公司 | A kind of valve pressure-resistant seal loop material matter |
-
2018
- 2018-08-27 CN CN201810979165.6A patent/CN109251448A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102649860A (en) * | 2012-04-24 | 2012-08-29 | 浙江大学 | Graphene/PTFE (Polytetrafluoroethylene) nanometer compound material and preparation method thereof |
| WO2014014590A1 (en) * | 2012-07-16 | 2014-01-23 | Baker Hughes Incorporated | High glass transition temperature thermoset and method of making the same |
| CN106012525A (en) * | 2016-06-22 | 2016-10-12 | 华东理工大学 | Super-hydrophobic modification method for polytetrafluoroethylene (PTTE) fibers applied to oily sewage treatment |
| CN107400278A (en) * | 2017-08-12 | 2017-11-28 | 安徽英科成流体科技有限公司 | A kind of valve pressure-resistant seal loop material matter |
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