CN115819904B - Glass fiber filled polytetrafluoroethylene anti-soaking water composite material and preparation method and application thereof - Google Patents
Glass fiber filled polytetrafluoroethylene anti-soaking water composite material and preparation method and application thereof Download PDFInfo
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- CN115819904B CN115819904B CN202211674887.3A CN202211674887A CN115819904B CN 115819904 B CN115819904 B CN 115819904B CN 202211674887 A CN202211674887 A CN 202211674887A CN 115819904 B CN115819904 B CN 115819904B
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- glass fiber
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- soaking water
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- 229920001343 polytetrafluoroethylene Polymers 0.000 title claims abstract description 79
- 239000004810 polytetrafluoroethylene Substances 0.000 title claims abstract description 79
- -1 polytetrafluoroethylene Polymers 0.000 title claims abstract description 78
- 239000003365 glass fiber Substances 0.000 title claims abstract description 76
- 239000002131 composite material Substances 0.000 title claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 238000002791 soaking Methods 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000002156 mixing Methods 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 7
- 238000011049 filling Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 229920000642 polymer Polymers 0.000 abstract description 4
- 230000035515 penetration Effects 0.000 abstract description 3
- 238000011179 visual inspection Methods 0.000 abstract description 3
- 238000000386 microscopy Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229920002313 fluoropolymer Polymers 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Abstract
The invention discloses a glass fiber filled polytetrafluoroethylene anti-soaking water composite material, and a preparation method and application thereof, and belongs to the field of polymer composite materials. The glass fiber filled polytetrafluoroethylene anti-soaking water composite material comprises polytetrafluoroethylene, and high-strength alkali-free glass fibers dispersed in the polytetrafluoroethylene; the addition amount of the high-strength alkali-free glass fiber is 25% -50% of the mass of polytetrafluoroethylene. The composite material provided by the invention has the advantages of water penetration resistance, high hardness, friction resistance and the like, is placed in water, has a smooth surface through microscopy and visual inspection, is free from adsorbing water bubbles, has a good water penetration resistance effect, expands the application range of the polytetrafluoroethylene composite material filled with glass fibers, and can be widely applied to the aerospace field.
Description
Technical Field
The invention belongs to the field of polymer composite materials, and particularly relates to a glass fiber filled polytetrafluoroethylene anti-soaking water composite material, and a preparation method and application thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
With the rapid development of aviation and aerospace industry, more severe requirements are put forward on the tribological properties of polymer composite materials applied to extreme conditions such as high speed, high temperature, heavy load and the like. The polymer composite material taking the fiber as the reinforcing phase can greatly improve the mechanical property of the material, thereby expanding the application range and the use temperature of the composite material. Polytetrafluoroethylene is a fluoroplastic resin having excellent high and low temperature resistance and chemical stability, non-adhesion, weather resistance, flame retardance and good self-lubricating property, and the product obtained when filling modification is performed by using glass fibers has the defect of being easy to be saturated with water, which severely limits the application of the fluoroplastic resin in aerospace. Therefore, how to overcome the problem of easy water penetration of the glass fiber filled polytetrafluoroethylene composite material, thereby expanding the application range of the composite material, and the composite material is a problem to be solved in the prior art.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide the glass fiber filled polytetrafluoroethylene alcohol anti-soaking water composite material, and the preparation method and the application thereof.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
in one aspect, a glass fiber filled polytetrafluoroethylene anti-soaking water composite material comprises polytetrafluoroethylene, high strength alkali-free glass fibers dispersed in the polytetrafluoroethylene;
the addition amount of the high-strength alkali-free glass fiber is 25% -50% of the mass of polytetrafluoroethylene.
On the other hand, the preparation method of the glass fiber filled polytetrafluoroethylene anti-soaking water composite material comprises the following steps:
(1) Proportionally adding polytetrafluoroethylene resin and high-strength alkali-free glass fiber into a pre-mixer for mixing, taking out, and adding into a high-speed mixer for mixing to obtain a glass fiber filled polytetrafluoroethylene composite material;
(2) Filling the composite material into a mould for pressing to obtain a blank;
(3) And sintering the blank to obtain the glass fiber filled polytetrafluoroethylene anti-soaking water composite material.
The glass fiber filled polytetrafluoroethylene anti-soaking water composite material prepared by the invention has the advantages of anti-soaking water, high hardness, friction resistance and the like, so that the glass fiber filled polytetrafluoroethylene anti-soaking water composite material is applied to mechanical sealing.
The beneficial effects of the invention are as follows:
1. the glass fiber filled polytetrafluoroethylene composite material for preventing water from being soaked has the advantages of water permeation prevention, high hardness, friction resistance and the like, and when the glass fiber filled polytetrafluoroethylene composite material is placed in water, the surface of the composite material is smooth and clean through a microscope and visual inspection, and no water bubbles are adsorbed, so that the composite material has a good water permeation prevention effect.
2. The preparation method of the glass fiber filled polytetrafluoroethylene anti-soaking water composite material has simple process, and the glass fiber which is alkali-free, fine in particles and capable of reinforcing hardening is filled in the polytetrafluoroethylene, so that the obtained composite material has good anti-soaking water effect, the defect of easy soaking water of a product obtained by filling a conventional glass fiber filled polytetrafluoroethylene composite material, especially a ground fiber chopped alkali-free fiber (commonly called E glass fiber) is overcome, and the application range of the glass fiber filled polytetrafluoroethylene composite material is enlarged.
3. The glass fiber filled polytetrafluoroethylene anti-soaking water composite material has wider application field range, is very suitable for being applied to mechanical sealing industries requiring good vapor tightness, high hardness and friction resistance, and can be widely applied to the aerospace field.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a flow chart of a method for preparing a glass fiber filled polytetrafluoroethylene anti-soaking water composite material according to the embodiment 1 of the invention;
FIG. 2 is a photograph showing the glass fiber-filled polytetrafluoroethylene anti-soaking water composite material prepared in example 1 of the present invention when immersed in water;
FIG. 3 is a photograph showing the glass fiber-filled polytetrafluoroethylene anti-soaking water composite material prepared in comparative example 1 of the present invention when immersed in water;
FIG. 4 is an SEM image of a glass fiber-filled polytetrafluoroethylene anti-soaking water composite material prepared in example 1 of the present invention;
FIG. 5 is an SEM image of a glass fiber-filled polytetrafluoroethylene anti-soaking water composite material prepared in comparative example 1 of the present invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
In view of the defect that the prior glass fiber filled polytetrafluoroethylene composite material is easy to soak and permeate water, the invention provides a glass fiber filled polytetrafluoroethylene composite material for preventing permeation and a preparation method and application thereof.
In an exemplary embodiment of the present invention, there is provided a glass fiber-filled polytetrafluoroethylene anti-soaking water composite comprising polytetrafluoroethylene, high strength alkali-free glass fibers dispersed in the polytetrafluoroethylene;
the addition amount of the high-strength alkali-free glass fiber is 25% -50% of the mass of polytetrafluoroethylene.
In some examples of this embodiment, the high strength alkali-free glass fibers have a mesh size of 1250 mesh, an average particle size in the range of 5-10 μm, and an aspect ratio of 13:1.
in some examples of this embodiment, the high strength alkali-free glass fiber is added in an amount of 25% by mass of polytetrafluoroethylene.
Polytetrafluoroethylene (PTFE) resins have heat resistance, low temperature resistance, chemical resistance, and electrical properties, are called "plastic king" in engineering plastics, and have excellent non-tackiness and self-lubricity, being resins with the lowest friction factor. The invention adopts high-strength alkali-free glass fiber to fill polytetrafluoroethylene, can improve the strength and hardness of plastics, improve the dimensional stability and reduce creep deformation, and obtains the high-permeability-preventing water composite material with excellent performance.
In another exemplary embodiment of the present invention, a method for preparing the glass fiber filled polytetrafluoroethylene anti-soaking water composite material is provided, comprising the following steps:
(1) Proportionally adding polytetrafluoroethylene resin and high-strength alkali-free glass fiber into a pre-mixer for mixing, taking out, and adding into a high-speed mixer for mixing to obtain a glass fiber filled polytetrafluoroethylene composite material;
(2) Filling the composite material into a mould for pressing to obtain a blank;
(3) And sintering the blank to obtain the glass fiber filled polytetrafluoroethylene anti-soaking water composite material.
In some examples of this embodiment, the premixer mixing is specifically: mixing in a 60-100 rpm premix for 5-30 minutes and preferably mixing in a 80 rpm premix for 10 minutes.
In some examples of this embodiment, the high speed blendor mixing is specifically: mixing for 5-30 minutes at 2000-4000r/min, preferably at 3000r/min for 5 minutes.
In some examples of this embodiment, the pressing pressure is 25-40Mpa.
In some examples of this embodiment, the sintering is: and (3) placing the blank material into an oven, and freely sintering in air at the sintering temperature of 350-380 ℃.
In some examples of this embodiment, the method of preparing further comprises: and (3) performing performance test on the finished product of the obtained glass fiber filled polytetrafluoroethylene anti-soaking water composite material.
Wherein the properties include tensile strength, elongation at break, shore hardness, specific gravity, visual observation, and anti-soaking water.
In a third exemplary embodiment of the present invention, there is provided the use of the glass fiber filled polytetrafluoroethylene anti-soaking water composite material described above in a mechanical seal.
Wherein the application is in mechanical sealing in the field of aerospace.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
The polytetrafluoroethylene used in the following examples was produced by new jinan nannocarungone materials: polytetrafluoroethylene suspension fine powder (trade mark MG 40) resin with average grain size between 20-27 um.
The high strength alkali-free glass fiber used in the following examples was commercially available, produced by Anhui, having a mesh size of 1250 mesh and an average particle size in the range of about 5 to 10 μm and an aspect ratio of 13:1.
the conventional alkali-free glass fibers used in the following examples are commercially available, produced in Japan, and have a mesh size of between 250 and 325 mesh and an average particle size of between 40 and 7. Mu.m.
Example 1
A preparation method of a glass fiber filled polytetrafluoroethylene anti-soaking water composite material is shown in figure 1, and comprises the following specific steps:
(1) Adding high-strength alkali-free glass fiber into polytetrafluoroethylene resin, mixing the high-strength alkali-free glass fiber with the mass of 25% of that of the polytetrafluoroethylene resin in a 80-turn per minute pre-mixer for 10 minutes, taking out, putting into a high-speed mixer, and mixing for 5 minutes at a rotating speed of 3000r/min to obtain the polytetrafluoroethylene composite material filled with the 25 high-strength alkali-free glass fiber, namely the polytetrafluoroethylene composite material filled with 25% of glass fiber.
(2) In the powder metallurgy mould pressing mode, the 25 high-strength alkali-free glass fiber filled polytetrafluoroethylene composite material is put into a mould, and the pressing force is 25-40Mpa, and the mould is pressed into a blank.
And (3) putting the preformed blank into an oven, and freely sintering in air at 365 ℃ to obtain the 25 glass fiber filled polytetrafluoroethylene anti-soaking water composite material.
3) And (5) testing the polytetrafluoroethylene anti-soaking water composite material filled with 25 glass fibers.
Comparative example 1
A method for preparing a glass fiber filled polytetrafluoroethylene composite material is different from example 1 in that a conventional alkali-free glass fiber filled polytetrafluoroethylene resin is used.
Example 2
A preparation method of a glass fiber filled polytetrafluoroethylene anti-soaking water composite material is different from the embodiment in that the high-strength alkali-free glass fiber accounts for 30% of the mass of polytetrafluoroethylene resin.
Example 3
A preparation method of a glass fiber filled polytetrafluoroethylene anti-soaking water composite material is different from the embodiment in that the high-strength alkali-free glass fiber accounts for 50% of the mass of polytetrafluoroethylene resin.
The composites prepared in example 1, example 3, comparative example 1 were tested for performance according to the following criteria,
astm d4894-15 (tensile strength/elongation at break);
GB/T2411-2008 (Shore hardness);
ATSMD792-2007 (specific gravity);
GB/T3960-2016 (coefficient of friction)
The results are shown in Table 1.
Table 1 results of testing the properties of the composite materials prepared in example 1 and comparative example 1
As is apparent from Table 1, in the composite impregnated water of example 1, no adsorbed blisters were present on the surface, and a large amount of blisters were adsorbed on the surface of the composite of comparative example 1 by electron microscopy and visual inspection. Meanwhile, the composite material of example 1 has improved tensile strength and elongation at break, reduced friction coefficient and enhanced wear resistance compared with the composite material of comparative example 1.
As can be seen from comparison of figures 2, 3, 4 and 5, the glass fiber filled polytetrafluoroethylene anti-infiltration water composite material prepared in the embodiment 1 is compact, has no holes on the surface, and has high air tightness and good waterproof effect. The detection of the performance of the high-strength alkali-free glass fiber filled polytetrafluoroethylene anti-soaking water composite material in the embodiment 1 can confirm that the material has a wider application range, is particularly suitable for the mechanical sealing industry requiring good vapor tightness, high hardness and abrasion resistance, and can be widely applied to the aerospace field.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The glass fiber filled polytetrafluoroethylene anti-soaking water composite material is characterized by comprising polytetrafluoroethylene and high-strength alkali-free glass fibers dispersed in the polytetrafluoroethylene;
the addition amount of the high-strength alkali-free glass fiber is 25% -50% of the mass of polytetrafluoroethylene;
the high-strength alkali-free glass fiber has the mesh number of 1250 meshes, the average particle size range of 5-10 mu m and the length-diameter ratio of 13:1.
2. the glass fiber filled polytetrafluoroethylene anti-soaking water composite according to claim 1, wherein the addition amount of the high-strength alkali-free glass fiber is 25% of the mass of polytetrafluoroethylene.
3. The method for preparing the glass fiber filled polytetrafluoroethylene anti-soaking water composite material according to any one of claims 1-2, which is characterized by comprising the following steps:
(1) Proportionally adding polytetrafluoroethylene resin and high-strength alkali-free glass fiber into a pre-mixer for mixing, taking out, and adding into a high-speed mixer for mixing to obtain a glass fiber filled polytetrafluoroethylene composite material;
(2) Filling the composite material into a mould for pressing to obtain a blank;
(3) And sintering the blank to obtain the glass fiber filled polytetrafluoroethylene anti-soaking water composite material.
4. The preparation method as claimed in claim 3, wherein the premixing machine comprises the following steps: mixing in a 60-100 turn per minute pre-mixer for 5-30 minutes, and taking out.
5. A method according to claim 3, wherein the high speed mixer mixing is specifically: mixing for 5-30 min at a rotation speed of 2000-4000 r/min.
6. A method of manufacture as claimed in claim 3 wherein the pressing pressure is 25 to 40MPa.
7. The method of claim 3, wherein the sintering is: and (3) placing the blank material into an oven, and freely sintering in air at the sintering temperature of 350-380 ℃.
8. Use of the glass fiber filled polytetrafluoroethylene anti-soaking water composite material according to any of claims 1-2 in mechanical seals.
9. The use according to claim 8, wherein the use is in mechanical seals in the field of aerospace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211674887.3A CN115819904B (en) | 2022-12-26 | 2022-12-26 | Glass fiber filled polytetrafluoroethylene anti-soaking water composite material and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211674887.3A CN115819904B (en) | 2022-12-26 | 2022-12-26 | Glass fiber filled polytetrafluoroethylene anti-soaking water composite material and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN115819904A CN115819904A (en) | 2023-03-21 |
| CN115819904B true CN115819904B (en) | 2023-08-22 |
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|---|---|---|---|---|
| FR1438785A (en) * | 1965-06-23 | 1966-05-13 | Marlo Co Inc | New material for gaskets |
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2022
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| CN115819904A (en) | 2023-03-21 |
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Denomination of invention: A glass fiber filled polytetrafluoroethylene waterproof composite material and its preparation method and application Granted publication date: 20230822 Pledgee: Shandong science and technology finance Company limited by guarantee Pledgor: JINAN SINOFLON NEW MATERIAL Co.,Ltd. Registration number: Y2023370000141 |
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