CN100439086C - Preparation method for polytetrafluoroethylene/fiber composite material added with metal oxide - Google Patents
Preparation method for polytetrafluoroethylene/fiber composite material added with metal oxide Download PDFInfo
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- CN100439086C CN100439086C CNB2005101206430A CN200510120643A CN100439086C CN 100439086 C CN100439086 C CN 100439086C CN B2005101206430 A CNB2005101206430 A CN B2005101206430A CN 200510120643 A CN200510120643 A CN 200510120643A CN 100439086 C CN100439086 C CN 100439086C
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- ptfe
- polytetrafluoroethylene
- fibrous composite
- adds
- samarium oxide
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Abstract
The present invention discloses a preparation method of a polytetrafluoroethylene/fibrous composite material with added metal oxides. In the preparation method, rare earth oxides are added in PTFE/CF, PTFE/GF, PTFE/CF/GF polytetrafluoroethylene/fibrous composite materials, and a polytetrafluoroethylene/fibrous composite material is prepared by blending, cold pressing, sintering and forming. The performance, such as tensile strength, bend strength, hardness, friction coefficient, grinding crack width, etc., of a polytetrafluoroethylene/fibrous composite material with added samarium oxide are obviously superior to that of a polytetrafluoroethylene/fibrous composite material without adding samarium oxide, wherein the friction coefficient is reduced obviously; after samarium oxide is added, the friction coefficients of PTFE/CF, PTFE/GF, PTFE/CF/GF polytetrafluoroethylene/fibrous composite materials can be respectively reduced by 30%, 45% and 25%.
Description
Technical field
The present invention relates to a kind of polytetrafluoroethylene (PTFE)/fibrous composite preparation method who adds metal oxide.
Background technology
Polytetrafluoroethylene (PTFE) has excellent self-lubricating property and low coefficient of friction, but because the surface of PTFE can be extremely low, the adhesive ability of the transfer membrane of formation on even part is relatively poor, causes heavy wear.People have carried out extensive studies to the modification of PTFE polishing machine at present, mainly contain the interior fiberfill fibers of PTFE, inorganic powder and organic polymer filler and carry out modification.Add filler, except the anti-wear performance that improves PTFE, can also improve its hardness and rigidity, make goods have good creep resistance and dimensional stability.In recent years, the rare earth compound research that is applied to lubriation material comes into one's own gradually.Jost points out that LaF can make the wear-out life of coating improve 2～4 times, makes the load bearing capacity of lubricating grease improve 10%～100%.The research of Chen Boshui etc. also shows, many oil-soluble rare earth compounds have excellent antiwear and friction reduction property, showed rare earth compound as lubricating additive in the tempting application prospect of tribological field.
Summary of the invention
Goal of the invention: patent of the present invention mainly is at polytetrafluoroethylene (PTFE)/fibrous composite system.After in polytetrafluoroethylene (PTFE), adding carbon fiber (CF), glass fibre (GF) or assorted fibre, because the compatibility of fiber and polytetrafluoroethylene (PTFE) is relatively poor, cause the mechanical property and the friction and wear behavior of composite to descend, after adding a certain amount of rare-earth oxide such as samarium oxide, can improve fiber combines with the interface of PTFE matrix, especially particularly remarkable to the coefficient of friction that improves composite, can obtain the comparatively good high-abrasive material of performance.
Summary of the invention:
Preparation method of the present invention adds a certain amount of fibrous composite and a certain amount of rare-earth oxide in polytetrafluoroethylene (PTFE); Through blend, cold pressing, sinter molding prepares polytetrafluoroethylene (PTFE)/fibrous composite.The samarium oxide that in polytetrafluoroethylene (PTFE), adds the carbon fiber and 0.5～2% (wt%) of 5～25% (wt%) in the said method.
The samarium oxide that in polytetrafluoroethylene (PTFE), adds the glass fibre and 0.5～2% (wt%) of 5～25% (wt%) in the said method.The samarium oxide that in polytetrafluoroethylene (PTFE), adds 5% (wt%) carbon fiber and 20% (wt%) glass fibre and 0.5～2% (wt%) in the said method;
The samarium oxide that in polytetrafluoroethylene (PTFE), adds 15% (wt%) carbon fiber and 10% (wt%) glass fibre and 0.5～2% (wt%) in the said method;
The samarium oxide that in polytetrafluoroethylene (PTFE), adds 10% (wt%) carbon fiber and 15% (wt%) glass fibre and 0.5～2% (wt%) in the said method.
Above-mentioned polytetrafluoroethylene (PTFE)/fibrous composite mixes 10min in high-speed mixer, sieve with 60 eye mesh screens, then the material that mixes is poured in the mould compression chamber, places and carries out cold moudling on the forcing press; Cold moudling pressure is 50MPa, dwell time 10min, the demoulding is taken out and is obtained polytetrafluoroethylene (PTFE)/fibrous composite prefabrication then, again with the prefabrication sinter molding, the control of the temperature of sintering is divided into four-stage: the phase I, be incubated 1h again after slowly being warming up to 330 ℃ from room temperature the time with 6h of beginning; Second stage from 330 ℃ to 375 ℃, is incubated 3 hours with 1.5h subsequently; Phase III, reduce to 320 ℃ with 2h from 375 ℃, be incubated 1h again; The quadravalence section made temperature drop to 260 ℃ by 320 ℃ with 1.5 hours, and then naturally cooled to room temperature and obtain polytetrafluoroethylene (PTFE)/fibrous composite.
The invention effect: the polytetrafluoroethylene (PTFE)/fibrous composite that has added samarium oxide obviously is better than un-added polytetrafluoroethylene (PTFE)/fibrous composite on performances such as hot strength, bending strength and hardness and coefficient of friction and polishing scratch width, wherein coefficient of friction descends significantly, has added the coefficient of friction that can make PTFE/CF, PTFE/GF, PTFE/CF/GF polytetrafluoroethylene (PTFE)/fibrous composite behind the samarium oxide and can descend respectively and reach 30%, 45% and 25%.
The specific embodiment
Embodiment 1
With 5%CF, 5%GF and 5%CF/20%GF respectively with 0.5%Sm
2O
3In high-speed mixer, mix 10min with PTFE polytetrafluoroethylene (PTFE) powder, sieve, then the material that mixes is poured in the mould compression chamber, place and carry out cold moudling on the forcing press with 60 eye mesh screens.Cold moudling pressure is 50MPa, dwell time 10min, the demoulding is taken out and is obtained PTFE composite prefabrication then, again with the prefabrication sinter molding, the control of the temperature of sintering is divided into four-stage: the phase I, be incubated 1h again after slowly being warming up to 330 ℃ from room temperature the time with 6h of beginning; Second stage from 330 ℃ to 375 ℃, is incubated 3 hours with 1.5h subsequently; Phase III, reduce to 320 ℃ with 2h from 375 ℃, be incubated 1h again; The quadravalence section made temperature drop to 260 ℃ by 320 ℃ with 1.5 hours, and then naturally cooled to room temperature and obtain PTFE/ fiber/Sm
2O
3Composite.Resulting polytetrafluoroethylene (PTFE)/fibrous composite blank is answered smooth surface, the obviously distortion of flawless, nothing.
Embodiment 2
With 15%CF, 15%GF and 15%CF/10%GF respectively with 1%Sm
2O
3In high-speed mixer, mix 10min with PTFE polytetrafluoroethylene (PTFE) powder, sieve, then the material that mixes is poured in the mould compression chamber, place and carry out cold moudling on the forcing press with 60 eye mesh screens.Cold moudling pressure is 50MPa, dwell time 10min, the demoulding is taken out and is obtained PTFE composite prefabrication then, again with the prefabrication sinter molding, the control of the temperature of sintering is divided into four-stage: the phase I, be incubated 1h again after slowly being warming up to 330 ℃ from room temperature the time with 6h of beginning; Second stage from 330 ℃ to 375 ℃, is incubated 3 hours with 1.5h subsequently; Phase III, reduce to 320 ℃ with 2h from 375 ℃, be incubated 1h again; The quadravalence section made temperature drop to 260 ℃ by 320 ℃ with 1.5 hours, and then naturally cooled to room temperature and obtain PTFE/ fiber/Sm
2O
3Composite.Resulting polytetrafluoroethylene (PTFE)/fibrous composite blank is answered smooth surface, the obviously distortion of flawless, nothing.
Embodiment 3
With 25%CF, 25%GF and 10%CF/15%GF respectively with 2%Sm
2O
3In high-speed mixer, mix 10min with PTFE polytetrafluoroethylene (PTFE) powder, sieve, then the material that mixes is poured in the mould compression chamber, place and carry out cold moudling on the forcing press with 60 eye mesh screens.Cold moudling pressure is 50MPa, dwell time 10min, the demoulding is taken out and is obtained PTFE composite prefabrication then, again with the prefabrication sinter molding, the control of the temperature of sintering is divided into four-stage: the phase I, be incubated 1h again after slowly being warming up to 330 ℃ from room temperature the time with 6h of beginning; Second stage from 330 ℃ to 375 ℃, is incubated 3 hours with 1.5h subsequently; Phase III, reduce to 320 ℃ with 2h from 375 ℃, be incubated 1h again; The quadravalence section made temperature drop to 260 ℃ by 320 ℃ with 1.5 hours, and then naturally cooled to room temperature and obtain PTFE/ fiber/Sm
2O
3Composite.Resulting polytetrafluoroethylene (PTFE)/fibrous composite blank is answered smooth surface, the obviously distortion of flawless, nothing.
Claims (2)
1. polytetrafluoroethylene (PTFE)/fibrous composite preparation method who adds metal oxide is characterized in that: this preparation method adds a certain amount of fibrous composite and a certain amount of rare-earth oxide in polytetrafluoroethylene (PTFE); Through blend, cold pressing, sinter molding prepares polytetrafluoroethylene (PTFE)/fibrous composite;
The samarium oxide that in polytetrafluoroethylene (PTFE), adds the carbon fiber and 0.5～2% (wt%) of 5～25% (wt%) in the said method;
Or
The samarium oxide that in polytetrafluoroethylene (PTFE), adds the glass fibre and 0.5～2% (wt%) of 5～25% (wt%) in the said method;
Or
The samarium oxide that in polytetrafluoroethylene (PTFE), adds 5% (wt%) carbon fiber and 20% (wt%) glass fibre and 0.5～2% (wt%) in the said method;
Or
The samarium oxide that in polytetrafluoroethylene (PTFE), adds 15% (wt%) carbon fiber and 10% (wt%) glass fibre and 0.5～2% (wt%) in the said method;
Or
The samarium oxide that in polytetrafluoroethylene (PTFE), adds 10% (wt%) carbon fiber and 15% (wt%) glass fibre and 0.5～2% (wt%) in the said method.
2. a kind of polytetrafluoroethylene (PTFE)/fibrous composite preparation method who adds metal oxide according to claim 1, it is characterized in that: above-mentioned polytetrafluoroethylene (PTFE)/fibrous composite mixes 10min in high-speed mixer, sieve with 60 eye mesh screens, then the material that mixes is poured in the mould compression chamber, placed and carry out cold moudling on the forcing press; Cold moudling pressure is 50MPa, dwell time 10min, the demoulding is taken out and is obtained polytetrafluoroethylene (PTFE)/fibrous composite prefabrication then, again with the prefabrication sinter molding, the control of the temperature of sintering is divided into four-stage: the phase I, be incubated 1h again after slowly being warming up to 330 ℃ from room temperature the time with 6h of beginning; Second stage from 330 ℃ to 375 ℃, is incubated 3 hours with 1.5h subsequently; Phase III, reduce to 320 ℃ with 2h from 375 ℃, be incubated 1h again; The quadravalence section made temperature drop to 260 ℃ by 320 ℃ with 1.5 hours, and then naturally cooled to room temperature and obtain polytetrafluoroethylene (PTFE)/fibrous composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101206430A CN100439086C (en) | 2005-12-16 | 2005-12-16 | Preparation method for polytetrafluoroethylene/fiber composite material added with metal oxide |
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| CNB2005101206430A CN100439086C (en) | 2005-12-16 | 2005-12-16 | Preparation method for polytetrafluoroethylene/fiber composite material added with metal oxide |
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| CN1788988A CN1788988A (en) | 2006-06-21 |
| CN100439086C true CN100439086C (en) | 2008-12-03 |
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| CNB2005101206430A Expired - Fee Related CN100439086C (en) | 2005-12-16 | 2005-12-16 | Preparation method for polytetrafluoroethylene/fiber composite material added with metal oxide |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104312190A (en) * | 2014-10-14 | 2015-01-28 | 荣成复合材料有限公司 | Composite material for lift pedals and cages |
| CN104369386A (en) * | 2014-10-31 | 2015-02-25 | 荣成复合材料有限公司 | Novel engine tappet |
| CN104448675A (en) * | 2014-10-31 | 2015-03-25 | 荣成复合材料有限公司 | Composite material motor vehicle pedal plate |
| CN108659410A (en) * | 2017-03-31 | 2018-10-16 | 南京工业大学 | Rare earth modified superfine glass fiber/fluoropolymer composite material and preparation method |
| CN107029479A (en) * | 2017-06-08 | 2017-08-11 | 安徽天诚环保机械有限公司 | A kind of dust-removal cloth-bag material of high temperature resistant and high-efficient and lasting |
| CN109373060A (en) * | 2018-12-25 | 2019-02-22 | 浙江鸿盛环保科技集团有限公司 | A kind of high intensity PFA multiple tube and preparation method thereof |
| CN113981672B (en) * | 2021-11-11 | 2022-10-11 | 中国科学院兰州化学物理研究所 | Rare earth oxide modified fiber fabric and preparation method and application thereof |
| CN116120684A (en) * | 2023-02-27 | 2023-05-16 | 中国科学院兰州化学物理研究所 | Wear-resistant composite material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487022A (en) * | 2003-07-17 | 2004-04-07 | 上海交通大学 | Prepn of RE-modified composite glass fiber/PTFE material |
| CN1597765A (en) * | 2004-08-12 | 2005-03-23 | 上海交通大学 | Preparation process for composite of rare earth modified carbon-fibre/polytetrafluoroethylene |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1487022A (en) * | 2003-07-17 | 2004-04-07 | 上海交通大学 | Prepn of RE-modified composite glass fiber/PTFE material |
| CN1597765A (en) * | 2004-08-12 | 2005-03-23 | 上海交通大学 | Preparation process for composite of rare earth modified carbon-fibre/polytetrafluoroethylene |
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| CN1788988A (en) | 2006-06-21 |
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