CN101508595A - Process for improving strength and flexibility of graphite plate - Google Patents
Process for improving strength and flexibility of graphite plate Download PDFInfo
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- CN101508595A CN101508595A CNA2008101240755A CN200810124075A CN101508595A CN 101508595 A CN101508595 A CN 101508595A CN A2008101240755 A CNA2008101240755 A CN A2008101240755A CN 200810124075 A CN200810124075 A CN 200810124075A CN 101508595 A CN101508595 A CN 101508595A
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Abstract
The invention relates to a technique for reinforcing graphite plate strength and enhancing graphite plate flexibility and comprises the following steps: (1) intercalation and mixing: firstly intercalating and oxidizing the crystalline flake graphite by strong oxidizing solution to prepare expandable graphite, and then mixing the prepared expandable graphite with alkaline inorganic fiber reinforced material evenly; (2) expanding and ingot-making: expanding the expandable graphite granules evenly mixed with the inorganic fiber reinforced material to obtain expanded coralgraphite, and rolling the expanded coralgraphite to form flake-shaped ingot material by machines; (3) soaking and drying: soaking the flake-shaped ingot material into soaking solution with low viscosity, and drying the soaked ingot material by a drying room equipped with heating and blowing equipment; and (4) coating and rolling: coating the surface of the graphite ingot material with a layer of coralgraphite after soaking and drying, and carrying out mechanical rolling compaction to produce board material. By adopting the technique, the combination of graphite and accessories is more solid, the products have the characteristics of higher mechanical strength, good flexibility and the like, and the technique can be realized in mass production easily.
Description
Invention field
The present invention relates to a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing, the enhancing that is particularly useful for graphite slab material is with softening.
Background technology
At present, Chinese patent CN87106668.8, CN1078485A, CN1094379A mainly adopts among the CN1259111A etc. and serve as a contrast netted or membranaceous organic or inorganic reinforcing filler again in the graphite worm layer; Or graphite slab material is carried out chemical impregnation handle; And then adopt mechanical pressing or caking agent that graphite worm layer and layers of reinforcement are combined closely, make graphite slab material strengthen, improve flexible.These methods, technology exist following shortcoming, the one, the strongthener in the graphite worm layer exposes easily, the 2nd, the effect flexible to the enhancing and the raising of graphite base material is not very obvious, the 3rd, graphite base material easily is stained with roller during mechanical again pressing behind steeping liq, if will improve intensity and flexibility, the content of enhancing, toughening material in the graphite base material must be improved, the performance of making materials such as sealing by graphite base material can be influenced like this.
Summary of the invention
The objective of the invention is at above-mentioned weak point, provide a kind of and can increase graphite slab material intensity, can improve the method for graphite slab material flexibility again.
To achieve these goals, the invention provides a kind of processing method that increases graphite cake intensity and graphite cake flexibility, comprise the following steps and condition:
(1) the intercalation oxidation with mix, at first adopt industrial strong oxidizing property solution commonly used to crystalline flake graphite carry out intercalation, oxidation makes expansible black lead, again expansible black lead and the alkaline inorganic fibre strongthener that makes mixed; Described raw material also can directly adopt expansible black lead;
(2) expand and base, the expansible black lead particle that mixes with the inorganic fibre strongthener is carried out expansion process, obtain expanded graphite worm, through mechanical compaction slabbing base material;
(3) dipping and oven dry place the low-viscosity steeping fluid to flood the laminar blank material, more impregnated base material are dried through the drying shed that has heating, blast apparatus;
(4) cover graphite worm layer, cal rolling making sheet, be added with one deck expanded graphite worm, make sheet material through cal rolling again on two surfaces of dipping, oven dry back graphite base material.
In above-mentioned processing method, described crystalline flake graphite carbon content is greater than 95%, and particle diameter is 50 orders～100 orders, wherein 80 order the bests; Described strong oxidizing property solution is the vitriol oil, concentrated nitric acid and potassium permanganate, a kind of or wherein several mixing material in the mineral fibre that described inorganic fibre strongthener can be calcium magnesium silicate fiber, magnesium oxide, aluminum oxide, carbon and graphite fibre and natural formation; The length of described fiber grain is 0.15mm～0.5mm, the width 2 μ m～4 μ m of particle diameter, and inorganic fibers does not participate in reaction with graphite, and stablizes down at 1000 ℃, and the addition of described inorganic fibre strongthener is 3%～20% of an expansible black lead particle weight.
In above-mentioned processing method, described expansion is with the expansible black lead after mixing with inorganic fibre, expands in the expansion chamber in gas flow under 800 ℃～1000 ℃.Graphite worm after the expansion is round inorganic fibre, and inorganic fibre is scattered in graphite worm therebetween.Described base is to be pressed into the thick graphite base material of 0.1mm～3.0mm through machinery, and the strongthener in the graphite worm layer is not easy to expose.
In above-mentioned processing method, described steeping fluid is polyvinyl acetate (PVA), resol, epoxy resin solution any of acetate, propionic acid, phosphoric acid and boric acid, the concentration of solution is 0.1mol/l～3.0mol/l, wherein solvent is alcohols such as ethanol, and the viscosity of steeping fluid is 20cps～180cps.Described immersion condition is that the speed of graphite slab material process steeping fluid is 5cm/min～20cm/min, and temperature is between 15 ℃～80 ℃; Described oven dry is that impregnated base material is dried through the drying shed that has heating, blast apparatus, and bake out temperature is controlled between 80 ℃～150 ℃.
In above-mentioned processing method, the described graphite worm layer that covers is to spread a layer thickness at the uniform expanded graphite worm of 0.1mm～3mm on the graphite base material surface of flooding after drying.Described cal rolling is to make intensified flexible graphite slab material and the rolling that thickness is 0.15mm～2.5mm with spreading the bad material pressure rolling of the graphite that covered the graphite worm layer, and its cal rolling pressure is 8MPa～15MPa.
The invention has the beneficial effects as follows that can improve graphite slab material and strengthen more than 50%, flexibility also is greatly improved.Through this technology, graphite combines more firm with auxiliary material, and goods have characteristics such as higher physical strength, snappiness be good, are easy to realize in scale operation.
Embodiment
Below by embodiment, technical scheme of the present invention is done concrete description.
The 80 order crystalline flake graphites process vitriol oil with 10kg, concentrated nitric acid and potassium permanganate solution intercalation, (particle diameter 80 orders account for more than 80% the expansible black lead particle that oxidation obtains, carbon containing 99%, allowance for expansion is the expansible black lead of 175ml/g), contain Calucium Silicate powder with 400g, magnesium oxide, the inorganic fibre of compositions such as aluminum oxide mixes, be placed on after mixing in the expansion chamber under Sweet natural gas atmosphere, expand down at 900 ℃, these expansible graphite worms are round inorganic fibre, inorganic fibre is scattered in graphite worm therebetween, after machinery is pressed into the thick graphite slab material of 0.4mm.Graphite slab material is the alcoholic solution that 2mol/l contains the resol of propionic acid through over-richness, the temperature of solution is 70 ℃, the speed of base material process is respectively 5cm/min, 10cm/min, 15cm/min, 20cm/min, after drying under 100 ℃, two surfaces at graphite slab material sprinkle graphite worm, and through rolling the back rolling under the 12MPa pressure, its thickness is 0.5mm.Its reinforced effects as shown in Table 1.
Table one
Claims (9)
1, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing is characterized in that described technology may further comprise the steps and condition:
(1) intercalation with mix, at first adopt strong oxidizing property solution to crystalline flake graphite carry out intercalation, oxidation makes expansible black lead, again expansible black lead and the inorganic fibre strongthener that makes mixed;
(2) expand and base, will expand in expansion chamber with the expansible black lead particle that the inorganic fibre strongthener mixes obtains expanded graphite, again to expanded graphite worm through mechanical compaction slabbing base material;
(3) dipping and oven dry place the low-viscosity steeping fluid to flood the laminar blank material, more impregnated base material are dried through the drying shed that has heating, blast apparatus;
(4) cover graphite worm layer, cal rolling making sheet, be added with one deck expanded graphite worm, make sheet material through cal rolling again on dipping, graphite base material surface, oven dry back.
2, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that, described crystalline flake graphite carbon content is greater than 95%, particle diameter is 50 orders～100 orders, and the addition of described inorganic fibre strongthener is 3%～20% of an expansible black lead particle weight.
3, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that, in described (1) intercalation and the mixing step, the intercalation oxidation with mix workshop section and can save the intercalation oxidation and only keep and mix workshop section, promptly adopting 50 orders～100 purpose expansible black leads is that raw material and inorganic fibre strongthener mix.
4, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that a kind of or wherein several mixing material in the mineral fibre that described inorganic fibre strongthener can be calcium magnesium silicate fiber, magnesium oxide, aluminum oxide, carbon and graphite fibre and natural formation; The length of described fiber grain is 0.15mm～0.5mm, the width 2 μ m～4 μ m of particle diameter, and inorganic fibers do not participate in reaction with graphite, and stable down at 1000 ℃.
5, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that, described expansion is with expansible black lead after mixing and inorganic fibre, expands in the expansion chamber in gas flow under 800 ℃～1000 ℃; Described base is to be pressed into the thick graphite base material of 0.1mm～3.0mm through machinery, and the strongthener in the graphite worm layer is not easy to expose.
6, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that, described steeping fluid is polyvinyl acetate (PVA), resol, epoxy resin solution any of acetate, propionic acid, phosphoric acid and boric acid, the concentration of solution is 0.1mol/l～3.0mol/l, wherein solvent is alcohols such as ethanol, and the viscosity of steeping fluid is 20cps～180cps.
7, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that, the condition of described dipping is that the speed of graphite slab material process steeping fluid is 5cm/min～20cm/min, and temperature is between 15 ℃～80 ℃; Described oven dry is that impregnated base material is dried through the drying shed that has heating, blast apparatus, and bake out temperature is controlled between 80 ℃～150 ℃.
8, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that the described graphite worm layer that covers is to spread the expanded graphite worm of layer of even thickness at 0.1mm～3mm on the graphite base material surface of flooding after drying.
9, a kind of graphite cake intensity and processing method that improves the graphite cake flexibility of increasing as claimed in claim 1, it is characterized in that, described cal rolling making sheet is that the bad material of graphite that covered the graphite worm layer is spread in pressure rolling under 8MPa～15Mpa pressure, and making thickness is 0.15mm～2.5mm intensified flexible graphite slab material.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101240755A CN101508595A (en) | 2008-06-11 | 2008-06-11 | Process for improving strength and flexibility of graphite plate |
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| CNA2008101240755A CN101508595A (en) | 2008-06-11 | 2008-06-11 | Process for improving strength and flexibility of graphite plate |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417177A (en) * | 2011-08-20 | 2012-04-18 | 山东东昀石墨科技有限公司 | Regulation method of anisotropies of flexible graphite film and board for heat conduction |
| CN103213973A (en) * | 2013-03-22 | 2013-07-24 | 于庆先 | Method for preparing flexible highly oriented graphite heat conduction material |
| CN105134720A (en) * | 2015-08-25 | 2015-12-09 | 江苏神州碳制品有限公司 | Graphite plate bonding technology |
| CN105752977A (en) * | 2016-04-29 | 2016-07-13 | 江苏超电新能源科技发展有限公司 | Preparation method of high-conductivity graphene powder |
| CN106082185A (en) * | 2016-06-08 | 2016-11-09 | 亚洲硅业（青海）有限公司 | A kind of method improving common graphite products machinery intensity |
| CN111662678A (en) * | 2020-06-12 | 2020-09-15 | 上海怡澎实业有限公司 | High-temperature antioxidant flexible graphite filler, preparation method thereof and high-temperature antioxidant flexible graphite packing |
| CN113682001A (en) * | 2021-08-16 | 2021-11-23 | 中国电力科学研究院有限公司 | Preparation method of conductivity-adjustable flexible graphite paper |
-
2008
- 2008-06-11 CN CNA2008101240755A patent/CN101508595A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417177A (en) * | 2011-08-20 | 2012-04-18 | 山东东昀石墨科技有限公司 | Regulation method of anisotropies of flexible graphite film and board for heat conduction |
| CN103213973A (en) * | 2013-03-22 | 2013-07-24 | 于庆先 | Method for preparing flexible highly oriented graphite heat conduction material |
| CN103213973B (en) * | 2013-03-22 | 2015-06-24 | 青岛南墅泰星石墨制品有限公司 | Method for preparing flexible highly oriented graphite heat conduction material |
| CN105134720A (en) * | 2015-08-25 | 2015-12-09 | 江苏神州碳制品有限公司 | Graphite plate bonding technology |
| CN105752977A (en) * | 2016-04-29 | 2016-07-13 | 江苏超电新能源科技发展有限公司 | Preparation method of high-conductivity graphene powder |
| CN105752977B (en) * | 2016-04-29 | 2017-12-12 | 江苏超电新能源科技发展有限公司 | A kind of technology of preparation method of high conductivity graphene powder |
| CN106082185A (en) * | 2016-06-08 | 2016-11-09 | 亚洲硅业（青海）有限公司 | A kind of method improving common graphite products machinery intensity |
| CN106082185B (en) * | 2016-06-08 | 2018-06-15 | 亚洲硅业（青海）有限公司 | A kind of method for improving common graphite products machinery intensity |
| CN111662678A (en) * | 2020-06-12 | 2020-09-15 | 上海怡澎实业有限公司 | High-temperature antioxidant flexible graphite filler, preparation method thereof and high-temperature antioxidant flexible graphite packing |
| CN111662678B (en) * | 2020-06-12 | 2023-07-21 | 上海弘枫实业有限公司 | High-temperature antioxidant flexible graphite filler, preparation method and high-temperature antioxidant flexible graphite packing |
| CN113682001A (en) * | 2021-08-16 | 2021-11-23 | 中国电力科学研究院有限公司 | Preparation method of conductivity-adjustable flexible graphite paper |
| CN113682001B (en) * | 2021-08-16 | 2024-06-21 | 中国电力科学研究院有限公司 | Preparation method of flexible graphite paper with adjustable conductivity |
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Open date: 20090819 |