CN103509300A - Superfine kaoline filled PTFE composite material and preparation method thereof - Google Patents
Superfine kaoline filled PTFE composite material and preparation method thereof Download PDFInfo
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- CN103509300A CN103509300A CN201310466210.5A CN201310466210A CN103509300A CN 103509300 A CN103509300 A CN 103509300A CN 201310466210 A CN201310466210 A CN 201310466210A CN 103509300 A CN103509300 A CN 103509300A
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Abstract
The invention provides a superfine kaoline filled PTFE composite material and a preparation method thereof. The composite material mainly comprises the following raw materials in parts by weight: 80 to 95 parts of teflon, 5 to 20 parts of superfine kaoline, 0.01 to 1 part of a filler, and 0.005 to 0.1 part of a surfactant. The superfine kaoline filled PTFE composite material provided by the invention has the advantages that as superfine kaoline is low in cost, wide in application range and soft, can be dispersed in suspended water, and has good plasticity, high cohesiveness and excellent electric insulation property, the composite material is simple in preparation technology, is economical and practical, and has high market competitiveness.
Description
Technical field
The present invention relates to a kind of ultrafine kaolin Filled PTEF matrix material and preparation method thereof.
Background technology
Polytetrafluoroethylene (PTFE) resin has the advantages such as frictional coefficient is low, high-low temperature resistant, resistance to chemical attack, ageing-resistant, height insulate, do not stick, but due to its poor dimensional stability, heat conductivility is poor, creep is large, hardness is low, especially easy to wear under load, it is restricted in the application in the fields such as machinery carrying, frictional wear and seal lubrication.Therefore in order to expand the Application Areas of PTFE, keeping, on the former advantageous basis of PTFE, adding weighting agent in PTFE, utilize complex effect, reach the object that improves PTFE over-all properties.Glass fibre, carbon fiber, graphite, molybdenumdisulphide, cenosphere and various ceramics powder are current the most frequently used weighting agents, but they have weak point, as not alkaline-resisting in glass fibre and hydrofluoric acid, not wear-resisting in water, glass fibre can damage dual face, molybdenumdisulphide, graphite, bronze powder, various ceramics powder hardness is large, easy to wear, therefore, need to find more suitable packing material, carry out processability excellence, apply more wide PTFE matrix material.
Kaolin is a kind of layer silicate mineral material of cheapness, and soft, the easy suspended dispersed of its matter is in water and have good plasticity-and high cohesiveness, good electrical insulation capability, good antiacid dissolubility, the very low character such as cation exchange capacity.Therefore kaolin has become necessary raw mineral materials in tens industries such as papermaking, pottery, rubber, chemical industry, coating, medicine and national defence.When kaolin is used as the weighting agent of plastics and rubber, can make frosting smooth, improve dimensional precision and resistance to chemical attack, and there is the tribological properties of improvement performance and mechanical property, so kaolin is with a wide range of applications aspect in plastics and rubber.
Summary of the invention
The object of the invention is to provide a kind of simple, the preparation method of the ultrafine kaolin Filled PTEF matrix material that cost is low, adopt the method preparation and ultrafine kaolin Filled PTEF composite property excellent, have wide range of applications.
The technical solution used in the present invention is:
A Filled PTEF matrix material, mainly by the following raw material of quality proportioning, made:
80 ~ 95 parts of tetrafluoroethylene
5 ~ 20 parts of ultrafine kaolins
0.01 ~ 1 part of filler
0.005 ~ 0.1 part, tensio-active agent;
The particle diameter of described tetrafluoroethylene is 20～200 μ m;
The particle diameter of described ultrafine kaolin is 0.02～20 μ m;
Described filler is one of following: aluminum oxide, zinc oxide, silicon oxide, glass fibre, carbon fiber, graphite, Graphene, MoS
2, particle diameter is 0.02 μ m ~ 20 μ m, is preferably aluminum oxide, graphite or MoS
2;
Described tensio-active agent is one of following: Perfluorocaprylic Acid, perfluorinated sulfonic acid, ammonium perfluorocaprylate or polyoxyethylene nonylphenol ether, be preferably Perfluorocaprylic Acid.
The above-mentioned solid material for the described matrix material of preparation, does not comprise water used in preparation process.
The method that the invention still further relates to the described ultrafine kaolin Filled PTEF matrix material of preparation, described method is as follows:
(1) tensio-active agent of formula ratio is soluble in water, be made into the solution of mass concentration 0.05 ~ 1%;
(2) in step (1) solution, add successively tetrafluoroethylene, the ultrasonic dispersion of ultrafine kaolin, then add filler, stir, obtain compound;
(3) step (2) gained compound is dried, coldmoulding under 30～40MPa pressure, pressurize 3～10 minutes;
(4) step (3) gained forming composition is put into high temperature sintering furnace, and 200～380 ℃ are incubated 0.5～4 hour;
(5) step (4) gained sintered product is cooled to room temperature, obtains described ultrafine kaolin Filled PTEF matrix material.
Step (4) method can be as follows: step (3) gained forming composition is put into high temperature sintering furnace, and the temperature rise rate heating with 30～100 ℃/h is incubated 1～2 time when temperature arrives 250～320 ℃, and each soaking time is 20～40 minutes; Then the temperature rise rate continuing with 30～100 ℃/min is heated to 350～380 ℃, is incubated 0.5～2 hour;
Step (5) method can be as follows: the sintered product of step (4) gained is incubated 20～40 minutes while being cooled to 250～320 ℃ with 30～100 ℃/h, then naturally cools to room temperature, obtains ultrafine kaolin Filled PTEF matrix material.
The ultrafine kaolin that adopts the inventive method preparation and obtain is filled PTFW matrix material, detects its wear loss≤2.5mg by GB GB/T-3960-1983, frictional coefficient≤0.2, detects its shore hardness >=58.0 by GB GB-T2411-1980, press ASTMD955 and detect, its shrinking percentage≤2.5%.
Ultrafine kaolin Filled PTEF matrix material of the present invention, can prepare transfer lime, vapor pipe, the vapour pipe of carrying corrosive gases, and the chemical industry equipments such as lining valve of high, normal, basic pressure pipeline, rectifying tower, heat exchanger and the still of rolling mill high-pressure line, plane hydraulic system and the system of colding pressing, tower, groove; The support slipper of structure roof truss, large-size chemical pipeline, storage tank, and bridge pad and the bridge formation equipment such as turn.
Beneficial effect of the present invention is mainly reflected in: ultrafine kaolin filled polytetrafluoroethylene matrix material of the present invention, due to kaolin low price, wide application, matter is soft, can dispersion suspension in water, and there is the tribological properties of improvement performance and mechanical property, therefore composite material preparation process is simple, economical and practical, has the stronger market competitiveness.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further, but protection scope of the present invention is not limited in this:
Embodiment 1:
Raw material:
PTFE (granularity 50 μ m), 85 mass parts;
Kaolin (granularity 0.2 μ m), 15 mass parts;
Al
2o
3(granularity 60nm), 0.05 mass parts;
Perfluorocaprylic Acid, 0.05 mass parts;
Method:
(1) Perfluorocaprylic Acid is soluble in water, be made into the solution of mass concentration 0.5%;
(2) in step (1) solution, add successively tetrafluoroethylene, ultrafine kaolin, ultrasonic (250W, 26KHz) disperses 10 minutes, then adds filler, stirs, and obtains compound;
(3) compound is put into agitator high speed and is stirred, and then at 38Mpa, suppresses lower coldmoulding (that is, compression moulding under room temperature), and the time of colding pressing is 5 minutes;
(4) step (3) gained forming composition is put into high temperature sintering furnace, and the temperature rise rate heating with 80 ℃/h is incubated 30 minutes when temperature arrives 330 ℃; Then continue to be heated to 370 ℃ with 60 ℃/h of temperature rise rates, be incubated 0.5 hour;
(5) when step (4) sintered product is cooled to 330 ℃ with the speed of 60 ℃/h, be incubated 24 minutes, then naturally cool to room temperature, obtain ultrafine kaolin Filled PTEF matrix material.
This ultrafine kaolin Filled PTEF matrix material is pressed GB/T-3960-1983 and is detected, its wear loss≤2.5 person of outstanding talent gram, frictional coefficient≤0.19; Press GB-T2411-1980 and detect, wherein shore hardness >=61.0; Press ASTM D955 and detect, its shrinking percentage≤2.2%; At the vitriol oil and sodium hydroxide, (concentration 40%, w/w) places 24 hours in solution, this ultrafine kaolin filled composite materials does not corrode respectively.
Embodiment 2:
Raw material:
PTFE (granularity 65 μ m), 85 mass parts;
Kaolin (granularity 0.1 μ m), 15 mass parts;
Graphite
(30 μ m), 0.05 mass parts;
Perfluorocaprylic Acid, 0.05 mass parts;
Method:
(1) Perfluorocaprylic Acid is soluble in water, be made into the solution of mass concentration 0.5%;
(2) in step (1) solution, add successively tetrafluoroethylene, ultrafine kaolin, ultrasonic (250W, 26KHz) disperses 10 minutes, then adds filler, stirs, and obtains compound;
(3) compound is put into agitator high speed and is stirred, and then 110 ℃ dry 2 hours, then at 35Mpa, suppresses lower coldmoulding (that is, compression moulding under room temperature), and the time of colding pressing is 8 minutes;
(4) forming composition is put into high temperature sintering furnace, with the temperature rise rate heating of 80 ℃/h, when temperature arrives 290
oduring C, be incubated 30 minutes; Then continue to be heated to 380 with 60 ℃/h of temperature rise rates
oc, is incubated 0.5 hour;
(5) when sintered product is cooled to 290 ℃ with the speed of 60 ℃/h, be incubated 30 minutes, then naturally cool to room temperature, obtain ultrafine kaolin Filled PTEF matrix material.
This ultrafine kaolin Filled PTEF matrix material is pressed GB/T-3960-1983 and is detected, its wear loss≤2.5 person of outstanding talent gram, frictional coefficient≤0.18; Press GB-T2411-1980 and detect, wherein shore hardness >=60.0; Press ASTM D955 and detect, its shrinking percentage≤2.2%; In the vitriol oil and sodium hydroxide (concentration 40%) solution, place 24 hours respectively, this ultrafine kaolin filled composite materials does not corrode.
Embodiment 3:
Raw material:
PTFE (granularity 65 μ m), 90 mass parts;
Kaolin (granularity 0.1 μ m), 9 mass parts;
MoS
2(0.06 μ m), 1 mass parts;
Perfluorinated sulfonic acid, 0.05 mass parts;
Method:
(1) Perfluorocaprylic Acid is soluble in water, be made into the solution of mass concentration 0.5%;
(2) in step (1) solution, add successively tetrafluoroethylene, ultrafine kaolin, ultrasonic (250W, 26KHz) disperses 10 minutes, then adds filler, stirs, and obtains compound;
(3) compound is put into agitator high speed and is stirred, and then 100 ℃ dry 2 hours, then at 35Mpa, suppresses lower coldmoulding (that is, compression moulding under room temperature), and the time of colding pressing is 5 minutes;
(4) forming composition is put into high temperature sintering furnace, and the temperature rise rate heating with 80 ℃/h is incubated 30 minutes when temperature arrives 290 ℃; Then continue to be heated to 380 ℃ with 60 ℃/h of temperature rise rates, be incubated 0.5 hour;
(5) when sintered product is cooled to 290 ℃ with the speed of 60 ℃/h, be incubated 30 minutes, then naturally cool to room temperature, obtain ultrafine kaolin Filled PTEF matrix material.
This ultrafine kaolin Filled PTEF matrix material is pressed GB/T-3960-1983 and is detected, its wear loss≤2.5 person of outstanding talent gram, frictional coefficient≤0.19; Press GB-T2411-1980 and detect, wherein shore hardness >=59.0; Press ASTM D955 and detect, its shrinking percentage≤2.2%; In the vitriol oil and sodium hydroxide (concentration 40%) solution, place 24 hours respectively, this ultrafine kaolin filled composite materials does not corrode.
Claims (2)
1. a ultrafine kaolin Filled PTEF matrix material, mainly by the following raw material of quality proportioning, made:
80 ~ 95 parts of tetrafluoroethylene
5 ~ 20 parts of ultrafine kaolins
0.01 ~ 1 part of filler
0.005 ~ 0.1 part, tensio-active agent;
The particle diameter of described tetrafluoroethylene is 20～200 μ m;
The particle diameter of described ultrafine kaolin is 0.02～20 μ m;
Described filler is one of following: aluminum oxide, zinc oxide, silicon oxide, glass fibre, carbon fiber, graphite, Graphene, MoS
2, particle diameter is 0.02 μ m ~ 20 μ m;
Described tensio-active agent is one of following: Perfluorocaprylic Acid, perfluorinated sulfonic acid, ammonium perfluorocaprylate or polyoxyethylene nonylphenol ether.
2. prepare the method for ultrafine kaolin Filled PTEF matrix material claimed in claim 1, described method is as follows:
The tensio-active agent of formula ratio is soluble in water, be made into the solution of mass concentration 0.05 ~ 1%;
In step (1) solution, add successively tetrafluoroethylene, the ultrasonic dispersion of ultrafine kaolin, then add filler, stir, obtain compound;
Step (2) gained compound is dried, coldmoulding under 30～40MPa pressure, pressurize 3～10 minutes;
Step (3) gained forming composition is put into high temperature sintering furnace, and 200～380 ℃ are incubated 0.5～4 hour;
Step (4) gained sintered product is cooled to room temperature, obtains described ultrafine kaolin Filled PTEF matrix material.
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Cited By (8)
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| CN103897305A (en) * | 2014-03-27 | 2014-07-02 | 安徽卧龙泵阀有限责任公司 | Strong alkali-resisting composite material of chemical process pump anticorrosion liner |
| CN103897308A (en) * | 2014-03-27 | 2014-07-02 | 安徽卧龙泵阀有限责任公司 | Process for forming strong-acid resistant composite material for anticorrosive lining of chemical process pump |
| CN105860378A (en) * | 2015-12-21 | 2016-08-17 | 无锡科莱欣机电制造有限公司 | Antioxidant plastic stent for solar cell panel |
| CN106243588A (en) * | 2016-08-23 | 2016-12-21 | 安徽海德石油化工有限公司 | A kind of alkylation acid hydrocarbon separation coalescent pack |
| CN107936425A (en) * | 2017-11-25 | 2018-04-20 | 郑州莉迪亚医药科技有限公司 | A kind of high-strength material and its preparation method and application |
| CN107987435A (en) * | 2017-11-21 | 2018-05-04 | 浙江德清科赛塑料制品有限公司 | kaolin filled polytetrafluoroethylene material |
| CN109021471A (en) * | 2018-08-09 | 2018-12-18 | 燕山大学 | Molybdenum disulfide-nickel phosphorus-ptfe composite preparation method |
| CN114989547A (en) * | 2022-06-24 | 2022-09-02 | 佛山科学技术学院 | Polymer composite material with abrasion in-situ repair function and preparation method and application thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103897305A (en) * | 2014-03-27 | 2014-07-02 | 安徽卧龙泵阀有限责任公司 | Strong alkali-resisting composite material of chemical process pump anticorrosion liner |
| CN103897308A (en) * | 2014-03-27 | 2014-07-02 | 安徽卧龙泵阀有限责任公司 | Process for forming strong-acid resistant composite material for anticorrosive lining of chemical process pump |
| CN105860378A (en) * | 2015-12-21 | 2016-08-17 | 无锡科莱欣机电制造有限公司 | Antioxidant plastic stent for solar cell panel |
| CN106243588A (en) * | 2016-08-23 | 2016-12-21 | 安徽海德石油化工有限公司 | A kind of alkylation acid hydrocarbon separation coalescent pack |
| CN107987435A (en) * | 2017-11-21 | 2018-05-04 | 浙江德清科赛塑料制品有限公司 | kaolin filled polytetrafluoroethylene material |
| CN107936425A (en) * | 2017-11-25 | 2018-04-20 | 郑州莉迪亚医药科技有限公司 | A kind of high-strength material and its preparation method and application |
| CN109021471A (en) * | 2018-08-09 | 2018-12-18 | 燕山大学 | Molybdenum disulfide-nickel phosphorus-ptfe composite preparation method |
| CN109021471B (en) * | 2018-08-09 | 2019-10-29 | 燕山大学 | Molybdenum disulfide-nickel phosphorus-ptfe composite preparation method |
| CN114989547A (en) * | 2022-06-24 | 2022-09-02 | 佛山科学技术学院 | Polymer composite material with abrasion in-situ repair function and preparation method and application thereof |
| CN114989547B (en) * | 2022-06-24 | 2024-01-02 | 佛山科学技术学院 | Polymer composite material with abrasion in-situ repair function and preparation method and application thereof |
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