JPH07315820A - Hydrophilic carbon material and its production - Google Patents
Hydrophilic carbon material and its productionInfo
- Publication number
- JPH07315820A JPH07315820A JP6128168A JP12816894A JPH07315820A JP H07315820 A JPH07315820 A JP H07315820A JP 6128168 A JP6128168 A JP 6128168A JP 12816894 A JP12816894 A JP 12816894A JP H07315820 A JPH07315820 A JP H07315820A
- Authority
- JP
- Japan
- Prior art keywords
- water
- carbon material
- hydrophilic
- carbon
- hydrophilic carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Ceramic Products (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、硝子の湿式成型用型を
含む硝子用治具、生体用材料、フィルター、機械部品等
で、親水性であることが要求されるものの構成材料とし
て使用するのに適した親水性カーボン材及びその製造方
法に関する。FIELD OF THE INVENTION The present invention is used as a constituent material for glass jigs, including glass wet molding dies, biomaterials, filters, mechanical parts, etc., which are required to be hydrophilic. And a method for producing the same.
【０００２】[0002]
【従来の技術】硝子の湿式成型用型を含む硝子用治具、
生体用材料、フィルター、機械部品等の分野において
は、機械的強度及び組織の緻密性等の点から、それらの
構成材料として各種カーボンが使用されている。2. Description of the Related Art A jig for glass including a mold for wet molding of glass,
In the fields of biomaterials, filters, mechanical parts, and the like, various carbons are used as the constituent materials thereof from the viewpoint of mechanical strength, denseness of tissue, and the like.
【０００３】例えば、湿式成型用型を用いた硝子の湿式
成型法の分野においては、従来、鋳物の型の表面にニカ
ワと混合したコルクを貼り付け、それを炭化させて成型
用型として使用していた。この湿式成型法は、水を含ま
せた型に予備成型した高温の硝子を接触させ、回転させ
ることによって行われ、その際に発生する水蒸気がクッ
ション材の役目を果たし、それによって硝子製品に所期
の光沢が賦与される。For example, in the field of glass wet molding using a wet molding mold, conventionally, cork mixed with glue was attached to the surface of a casting mold and carbonized to be used as a molding mold. Was there. This wet molding method is performed by bringing a pre-molded high-temperature glass into contact with a mold containing water and rotating it, and the steam generated at that time acts as a cushioning material, so that the glass product is affected. Period gloss is imparted.
【０００４】しかしながら、硝子の湿式成型用型の作製
には特殊技術が必要であり、満足すべき製品が得られに
くかったし、作製された型は、水の保持量が少なく、ま
た、使用寿命も短いため、得られた硝子製品の光沢が低
下すること、経済性が悪いこと等の問題があった。However, it is difficult to obtain a satisfactory product because a special technique is required to manufacture a mold for wet molding of glass, and the prepared mold has a small amount of water retention and a service life. However, since the obtained glass product is short, the gloss of the obtained glass product is lowered, and the economy is poor.
【０００５】また、硝子の成型ラインは高温でありしか
も多量の水が使用されているので、このラインで使用さ
れるシャー（溶融硝子切断用治具）やスクープ（溶融硝
子搬送治具）等の硝子用治具には耐熱性・親水性等の機
能が要求される。さらに、補綴材等の生体用材料、フィ
ルター、機械部品等の分野においても、水系で使用され
るカーボン部材については、水との濡れ性が重要にな
る。Further, since the glass molding line has a high temperature and a large amount of water is used, the shear (melting glass cutting jig) and scoop (melting glass conveying jig) used in this line are used. Glass jigs are required to have functions such as heat resistance and hydrophilicity. Furthermore, in the fields of biomaterials such as prosthetic materials, filters, and mechanical parts, wettability with water is important for carbon members used in water systems.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、硝子の
湿式成型用型を含む硝子用治具、生体用材料、フィルタ
ー、機械部品等の分野において、それらの構成材料とし
て使用されているカーボンは、一般に撥水性であるた
め、水に濡れず、使用時に水との接触が要求される場合
には全く使用できないという欠点があった。However, in the fields of glass jigs, including glass wet molding dies, biomaterials, filters, mechanical parts, etc., carbon generally used as a constituent material thereof is generally used. Since it is water repellent, it has a drawback that it does not get wet and cannot be used at all when contact with water is required during use.
【０００７】本発明の目的は、これらの従来技術の問題
点を解消し、親水性に優れたカーボン材及びその製造方
法を提供することにある。An object of the present invention is to solve these problems of the prior art and to provide a carbon material having excellent hydrophilicity and a method for producing the carbon material.
【０００８】[0008]
【課題を解決するための手段】本発明者らは、前記問題
点を解決するため種々の検討を行った。その結果、特定
の物性を有するカーボン材が、水の吸収・放出を一定の
速度で可逆的に行うことを見いだし、本発明を完成する
に至った。Means for Solving the Problems The present inventors have made various studies in order to solve the above problems. As a result, they have found that a carbon material having specific physical properties reversibly absorbs and releases water at a constant rate, and completed the present invention.
【０００９】すなわち、本発明は、１．０ｃｃ／ｃｍ2
・ｍｉｎ以上の速度で水を吸収してポア内に保持する吸
水と、吸収された水の放出とが可逆的に進行し、素材と
なるカーボンが気孔率１０％以上、平均孔径１μｍ以上
のものであることを特徴とする親水性カーボン材であ
る。本発明の前記親水性カーボン材は硝子の湿式成型用
型に形成して用いるのに好適である。That is, according to the present invention, 1.0 cc / cm 2
· Water absorption that absorbs water at a speed of min or more and retains it in the pores and release of absorbed water reversibly progresses, and the material carbon has a porosity of 10% or more and an average pore diameter of 1 μm or more Is a hydrophilic carbon material. The hydrophilic carbon material of the present invention is suitable for use by forming it in a wet mold for glass.
【００１０】また、本発明は、気孔率１０％以上、平均
孔径１μｍ以上の多孔質カーボンを７００〜９００℃の
温度で水蒸気賦活するか、この多孔質カーボンを水酸化
ナトリウム、水酸化カリウム等の水酸化アルカリ水溶液
に浸漬して、水酸化アルカリを、固形分基準で５〜３０
％担持せしめ、次いで６００〜１０００℃の温度で処理
するか、硝酸や硝酸と硫酸との混合物により処理する
か、或いは空気酸化する等して前記多孔質カーボンに親
水化処理を施すことからなる、１．０ｃｃ／ｃｍ2 ・ｍ
ｉｎ以上の速度で水を吸収してポア内に保持する吸水
と、吸収された水の放出とが可逆的に進行する親水性カ
ーボン材を製造する方法である。Further, according to the present invention, porous carbon having a porosity of 10% or more and an average pore diameter of 1 μm or more is activated by steam at a temperature of 700 to 900 ° C., or the porous carbon is treated with sodium hydroxide, potassium hydroxide or the like. Immerse in an aqueous solution of alkali hydroxide to add 5-30 alkali alkali hydroxide on a solids basis.
%, Then treated at a temperature of 600 to 1000 ° C., treated with nitric acid or a mixture of nitric acid and sulfuric acid, or air-oxidized to subject the porous carbon to a hydrophilic treatment. 1.0 cc / cm 2 · m
It is a method of producing a hydrophilic carbon material in which water absorption at a rate of in or more and retention in the pores and release of absorbed water reversibly proceed.
【００１１】本発明の親水性カーボン材は、水の吸収
と、例えば加熱等による水の放出とが可逆的に進行する
という特長を有している。そのため、構成材料としてカ
ーボンが使用されている硝子の湿式成型用型を含む硝子
用治具、生体用材料、フィルター、機械部品等の中で
も、特に親水性が要求されるものに有利に使用し得る。
また、本発明の親水性カーボン材は、高い耐食性、例え
ば、高い耐熱性（不活性ガス中で１５００℃まで、ま
た、空気中で４００℃までの温度に耐え得る）、酸及び
アルカリに対する優れた耐薬品性並びにアセトン、メタ
ノール等に対する優れた耐溶剤性を有している。The hydrophilic carbon material of the present invention is characterized in that the absorption of water and the release of water by, for example, heating reversibly proceed. Therefore, it can be advantageously used for glass jigs including wet molds for glass in which carbon is used as a constituent material, biomaterials, filters, mechanical parts, etc., which are particularly required to have hydrophilicity. .
Further, the hydrophilic carbon material of the present invention has high corrosion resistance, for example, high heat resistance (capable of withstanding temperatures up to 1500 ° C. in inert gas and up to 400 ° C. in air), and excellent in acid and alkali. It has chemical resistance and excellent solvent resistance to acetone, methanol, etc.
【００１２】本発明の親水性カーボン材のための素材と
しては、押出し法、モールド法、ＣＩＰ法等により製造
される一般のカーボン材をはじめ、ＶＣＰ（商品名、日
本カーボン（株）製の多孔質カーボン）やＶＣＦ（商品
名、日本カーボン（株）製の多孔質カーボン）のような
多孔質ビトロカーボン等を含め、ほぼ全てのカーボン材
が使用できる。Materials for the hydrophilic carbon material of the present invention include general carbon materials manufactured by extrusion, molding, CIP, etc., and VCP (trade name, porous carbon manufactured by Nippon Carbon Co., Ltd.). Almost all carbon materials can be used, including porous carbon such as fine carbon) and VCF (trade name, porous carbon manufactured by Nippon Carbon Co., Ltd.).
【００１３】本発明のカーボン材のための素材に要求さ
れる特性としては、気孔率が１０％以上であり、平均孔
径が１μｍ以上であることが必要である。気孔率が１０
％未満であると、水の保持量が少なくなり、硝子成型用
型等の分野で使用できなくなる。また、平均孔径が１μ
ｍ未満であると、水の吸収速度が１．０ｃｃ／ｃｍ2・
ｍｉｎ未満となり、水の吸収に長時間を要することにな
り、効率的でない。The properties required for the material for the carbon material of the present invention are that the porosity is 10% or more and the average pore diameter is 1 μm or more. Porosity is 10
If it is less than%, the amount of water retained becomes small and it cannot be used in the field of glass molding dies. The average pore size is 1μ
If it is less than m, the absorption rate of water is 1.0 cc / cm 2 ·
It is less than min, and it takes a long time to absorb water, which is not efficient.
【００１４】[0014]
【作用】本発明による親水性カーボン材は、気孔率１０
％以上、平均孔径１μｍ以上の組織特性を備えたカーボ
ン素材を用いて製造され、１．０ｃｃ／ｃｍ2 ・ｍｉｎ
以上の速度で水を吸収してポア内に保持する吸水と吸収
された水の放出とが可逆的に進行する特性を有している
ので、かかる親水性カーボン材によって構成される硝子
成型用カーボン治具等は、水への濡れ性もよく、また、
吸水速度も速く、しかも耐熱性・耐久性等にも優れてい
る。The hydrophilic carbon material according to the present invention has a porosity of 10
% Or more, 1.0 cc / cm 2 · min manufactured using a carbon material having a microstructure with an average pore size of 1 μm or more
Since it has the characteristic that water absorption at the above speeds and retention in the pores and release of absorbed water reversibly proceed, carbon for glass molding composed of such hydrophilic carbon material Jigs have good wettability with water, and
It has a high water absorption rate and is also excellent in heat resistance and durability.
【００１５】[0015]
【実施例】次に本発明の実施例と比較例について説明す
るが、これらは単なる例示にすぎず、本発明を制限する
ものではない。 （実施例１）気孔率３０％、平均孔径２０μｍの多孔質
ガラス状カーボンＶＣＰ−２０（商品名、日本カーボン
（株）製）を８００℃の温度で、３０分間水蒸気賦活し
た。得られた親水性カーボン材は瞬間的に水を吸収し、
その吸水速度は８．５ｃｃ／ｃｍ2 ・ｍｉｎ、保水量は
１６．３％であった。EXAMPLES Next, examples of the present invention and comparative examples will be described, but these are merely examples and do not limit the present invention. (Example 1) Porous glassy carbon VCP-20 (trade name, manufactured by Nippon Carbon Co., Ltd.) having a porosity of 30% and an average pore diameter of 20 µm was activated with steam at a temperature of 800 ° C for 30 minutes. The resulting hydrophilic carbon material absorbs water instantaneously,
The water absorption rate was 8.5 cc / cm 2 · min, and the water retention amount was 16.3%.
【００１６】次に、この親水性カーボン材を水に浸漬し
て、ポア内に水を吸収させ、次いで３００℃の温度で乾
燥する操作を５０回繰り返し、吸水速度及び保水量を測
定した。その結果、５０回経過後の吸収速度は８．４ｃ
ｃ／ｃｍ2 ・ｍｉｎ、保水量は１６．４％であり、水の
吸収・放出が可逆的に進行し、しかも、本発明は耐久性
に優れていることが確認された。Next, the operation of immersing the hydrophilic carbon material in water to absorb the water in the pores and then drying at a temperature of 300 ° C. was repeated 50 times, and the water absorption rate and the water retention amount were measured. As a result, the absorption rate after lapse of 50 times was 8.4c.
It was confirmed that c / cm 2 · min and the water retention amount were 16.4%, the absorption and release of water proceeded reversibly, and the present invention was excellent in durability.
【００１７】（比較例１）気孔率２０％、平均孔径０．
５μｍの多孔質ガラス状カーボンＶＣＰ−０５（商品
名、日本カーボン（株）製）を実施例１と同様にして水
蒸気賦活した。得られた親水性カーボン材の吸水速度は
０．６ｃｃ／ｃｍ2 ・ｍｉｎであり、素材の孔径が小さ
くなると、吸水速度は相当低くなった。(Comparative Example 1) Porosity 20%, average pore diameter 0.
5 μm of porous glassy carbon VCP-05 (trade name, manufactured by Nippon Carbon Co., Ltd.) was steam-activated in the same manner as in Example 1. The water absorption rate of the obtained hydrophilic carbon material was 0.6 cc / cm 2 · min, and the water absorption rate became considerably low as the pore diameter of the material became small.
【００１８】（実施例２）気孔率３０％、平均孔径２．
５μｍのカーボン材ＳＥＧ−ＲＢ（商品名、日本カーボ
ン（株）製）を水酸化アルカリ水溶液に浸漬し、水酸化
カリウムを、固形分基準で１０％担持せしめ、次いで、
９００℃の温度で１時間処理した。得られた親水性カー
ボン材を水洗し、中性とした後、その吸水速度及び保水
量を測定したところ、吸水速度は１．５ｃｃ／ｃｍ2 ・
ｍｉｎ、保水量は１６．２％であった。次いで、このカ
ーボン材を用いて実施例１と同様に５０回、吸水・放出
の操作を繰り返した。その結果、吸水速度及び保水量に
はほとんど変化はなく、水の吸収・放出が可逆的に進行
し、しかも、本発明品は耐久性に優れていることが確認
された。Example 2 Porosity 30%, average pore size 2.
A carbon material SEG-RB (trade name, manufactured by Nippon Carbon Co., Ltd.) having a thickness of 5 μm was immersed in an aqueous alkali hydroxide solution to support 10% of potassium hydroxide on a solid content basis, and then,
It was treated at a temperature of 900 ° C. for 1 hour. The obtained hydrophilic carbon material was washed with water to make it neutral, and then the water absorption rate and the water retention amount were measured, and the water absorption rate was 1.5 cc / cm 2.
min, the water retention amount was 16.2%. Then, using this carbon material, the operation of absorbing and releasing water was repeated 50 times in the same manner as in Example 1. As a result, it was confirmed that there was almost no change in the water absorption rate and the water retention amount, the water absorption / release proceeded reversibly, and the product of the present invention was excellent in durability.
【００１９】（実施例３）気孔率７０％、平均孔径２５
μｍの多孔質ガラス状カーボン材ＶＣＦ−２５（商品
名、日本カーボン（株）製）を７５０℃の温度で、３０
分間水蒸気賦活した。得られた親水性カーボン材の吸水
速度は１２．４ｃｃ／ｃｍ2 ・ｍｉｎ、保水量は４１．
６％であった。次いで、このカーボン材を用いて実施例
１と同様に５０回、吸水・放出の操作を繰り返した。そ
の結果、吸水速度及び保水量にはほとんど変化はなく、
水の吸収・放出が可逆的に進行し、しかも、本発明品は
耐久性に優れていることが確認された。Example 3 Porosity 70%, Average Pore Diameter 25
30 μm of a porous glassy carbon material VCF-25 (trade name, manufactured by Nippon Carbon Co., Ltd.) at a temperature of 750 ° C.
Steam activation for minutes. The hydrophilic carbon material obtained had a water absorption rate of 12.4 cc / cm 2 · min and a water retention capacity of 41.
It was 6%. Then, using this carbon material, the operation of absorbing and releasing water was repeated 50 times in the same manner as in Example 1. As a result, there is almost no change in water absorption rate and water retention capacity,
It was confirmed that the absorption and release of water proceed reversibly and that the product of the present invention has excellent durability.
【００２０】[0020]
【発明の効果】以上説明したように、本発明によれば、
一定の速度で水の吸収と放出とが可逆的に進行し、しか
も、素材となるカーボンが特定の気孔率及び平均孔径を
有しているものである親水性カーボン材及びその製造方
法が提供でき、その親水性カーボン材から構成されたカ
ーボン治具等は、水への濡れ性及び耐久性に優れてお
り、親水性の要求される分野で使用し得る。As described above, according to the present invention,
It is possible to provide a hydrophilic carbon material in which absorption and release of water proceed reversibly at a constant rate, and moreover, the carbon as a raw material has a specific porosity and average pore diameter, and a method for producing the same. A carbon jig or the like made of the hydrophilic carbon material has excellent wettability with water and durability, and can be used in fields requiring hydrophilicity.
Claims (5)
で水を吸収してポア内に保持する吸水と、吸収された水
の放出とが可逆的に進行し、素材となるカーボンが気孔
率１０％以上、平均孔径１μｍ以上のものであることを
特徴とする親水性カーボン材。1. The absorption of water, which absorbs water at a rate of 1.0 cc / cm 2 · min or more, and retains it in the pores, and the release of absorbed water reversibly proceed, and carbon as a material has pores. A hydrophilic carbon material having a ratio of 10% or more and an average pore diameter of 1 μm or more.
特徴とする請求項１記載の親水性カーボン材。2. The hydrophilic carbon material according to claim 1, wherein the hydrophilic carbon material is formed in a wet mold for glass.
である多孔質カーボンに親水化処理を施すことを特徴と
する１．０ｃｃ／ｃｍ2 ・ｍｉｎ以上の速度で水を吸収
してポア内に保持する吸水と、吸収された水の放出とが
可逆的に進行する親水性カーボン材の製造方法。3. A porous carbon having a porosity of 10% or more and an average pore diameter of 1 μm or more is subjected to a hydrophilization treatment, which absorbs water at a rate of 1.0 cc / cm 2 · min or more and inside the pores. A method for producing a hydrophilic carbon material, in which the water absorption retained in and the release of the absorbed water reversibly proceed.
７００〜９００℃の温度で水蒸気賦活するものであるこ
とを特徴とする請求項３記載の親水性カーボン材の製造
方法。4. The method for producing a hydrophilic carbon material according to claim 3, wherein the hydrophilizing treatment activates the porous carbon with steam at a temperature of 700 to 900 ° C.
水酸化アルカリ水溶液に浸漬して、水酸化アルカリを、
固形分基準で５〜３０％担持せしめ、次いで６００〜１
０００℃の温度で処理するものであることを特徴とする
請求項３記載の親水性カーボン材の製造方法。5. The hydrophilic treatment is performed by immersing the porous carbon in an aqueous alkali hydroxide solution to remove the alkali hydroxide.
Support 5 to 30% based on solid content, then 600 to 1
The method for producing a hydrophilic carbon material according to claim 3, wherein the treatment is performed at a temperature of 000 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06128168A JP3080838B2 (en) | 1994-05-18 | 1994-05-18 | Hydrophilic carbon material and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06128168A JP3080838B2 (en) | 1994-05-18 | 1994-05-18 | Hydrophilic carbon material and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07315820A true JPH07315820A (en) | 1995-12-05 |
| JP3080838B2 JP3080838B2 (en) | 2000-08-28 |
Family
ID=14978088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06128168A Expired - Lifetime JP3080838B2 (en) | 1994-05-18 | 1994-05-18 | Hydrophilic carbon material and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3080838B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005146157A (en) * | 2003-11-18 | 2005-06-09 | Mitsui Chemicals Inc | Epoxy resin composition and hollow package for housing semiconductor element |
-
1994
- 1994-05-18 JP JP06128168A patent/JP3080838B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005146157A (en) * | 2003-11-18 | 2005-06-09 | Mitsui Chemicals Inc | Epoxy resin composition and hollow package for housing semiconductor element |
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