JPH02234973A - Production of high-strength carbon fiber - Google Patents
Production of high-strength carbon fiberInfo
- Publication number
- JPH02234973A JPH02234973A JP5389489A JP5389489A JPH02234973A JP H02234973 A JPH02234973 A JP H02234973A JP 5389489 A JP5389489 A JP 5389489A JP 5389489 A JP5389489 A JP 5389489A JP H02234973 A JPH02234973 A JP H02234973A
- Authority
- JP
- Japan
- Prior art keywords
- titanium dioxide
- carbon fiber
- carbon fibers
- fiber
- pref
- 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.)
- Pending
Links
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 47
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 47
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 239000011261 inert gas Substances 0.000 claims abstract description 6
- 239000012298 atmosphere Substances 0.000 claims abstract description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000002994 raw material Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 238000010304 firing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000003607 modifier Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 2
- 238000009987 spinning Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- -1 titanate ester Chemical class 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- GMMZXKSNKIUKOW-UHFFFAOYSA-N [O-2].[O-2].[Ti+4].C(C)O Chemical compound [O-2].[O-2].[Ti+4].C(C)O GMMZXKSNKIUKOW-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 150000005622 tetraalkylammonium hydroxides Chemical class 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 238000002525 ultrasonication Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Chemical Or Physical Treatment Of Fibers (AREA)
- Inorganic Fibers (AREA)
- Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、機械的強度の優れた炭素繊維の製造方法、さ
らに詳しくいえば炭素繊維に特定の処理を施して、機械
的強度を向上させる方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing carbon fibers with excellent mechanical strength, and more specifically, to a method for improving mechanical strength by subjecting carbon fibers to specific treatments. It is something.
従来の技術
炭素繊維は、耐熱性、導電性、耐食性などの物性に優れ
Ｉ；材料であり、プラスチックス、セメント、その他の
補強材、充てん剤として広く使用されているが、近年、
これの単独利用がはかられるようになった結果、機械的
強度の向上が要求され、原料組成の選択、紡糸条件、焼
成条件などの調整などにより、高強度の炭素繊維を得る
試みが多数行われている。Conventional technology Carbon fiber is a material with excellent physical properties such as heat resistance, conductivity, and corrosion resistance, and is widely used as a reinforcing material and filler for plastics, cement, and other materials.
As a result of the independent use of carbon fibers, improvements in mechanical strength were required, and many attempts were made to obtain high-strength carbon fibers by adjusting the raw material composition, spinning conditions, firing conditions, etc. It is being said.
しかしながら、このような方法はいずれも、原料組成の
差異により、紡糸条件、焼成条件が微妙に異なるため、
再現性よく高強度の炭素繊維を得ることが非常に困難で
あり、工業的に実施するには必ずしも満足すべきものと
はいえない。However, all of these methods require slightly different spinning and firing conditions due to differences in raw material composition.
It is very difficult to obtain high-strength carbon fibers with good reproducibility, and it is not necessarily satisfactory for industrial implementation.
他方において、炭素繊維の表面に改質剤、例えばチタン
酸エステルやホウ酸エステル及びテトラアルキルアンモ
ニウムヒドロキシドなどの溶液を含浸させ焼成する方法
（特開昭５５ − ３３４６号公報、特開昭５８−９１
８７０号公報）が知られているが、これらの方法は、耐
食性、化学的安定性の付与には有効であるが、改質剤の
被覆が単に炭素繊維表面と物理的に結合しているだけで
あるので、剥離しやすい上に機械的強度の向上にはほと
んど役立っていない。On the other hand, there is a method in which the surface of carbon fiber is impregnated with a solution of a modifier, such as a titanate ester, a borate ester, or a tetraalkylammonium hydroxide, and then fired (JP-A-55-3346, JP-A-58- 91
Although these methods are effective in imparting corrosion resistance and chemical stability, they do not require that the modifier coating is merely physically bonded to the carbon fiber surface. Therefore, it is easy to peel off and is of little use in improving mechanical strength.
したがって、炭素繊維、特に機械的強度の低いことが欠
点となっているピッチ系炭素繊維について簡単な処理で
、機械的強度を向上させる技術の出現が強く要望されて
いた。Therefore, there has been a strong demand for a technology to improve the mechanical strength of carbon fibers, particularly pitch-based carbon fibers which suffer from low mechanical strength, through a simple process.
発明が解決しようとする課題
本発明は、炭素繊維表面に改質剤を塗布し、焼成すると
いう簡単な処理で、機械的強度の高い炭素繊維を得る方
法を提供することを目的としてなされたものである。Problems to be Solved by the Invention The purpose of the present invention is to provide a method for obtaining carbon fibers with high mechanical strength by a simple process of applying a modifier to the surface of carbon fibers and firing them. It is.
課題を解決するだめの手段
本発明者は炭素繊維表面を補強する処理法を開発するた
めに鋭意研究を重ねた結果、平均粒径の細かい超微粒子
状二酸化チタンを炭素繊維の表面に付着させて、特定条
件で熱処理し、炭素繊維の表面を改質することによって
前記目的を達成できることを見出し、この知見に基づい
て本発明を完成するに至った。As a result of extensive research in order to develop a treatment method for reinforcing the surface of carbon fibers, the inventors of the present invention have developed a method of adhering ultrafine titanium dioxide with a fine average particle size to the surface of carbon fibers. It was discovered that the above object can be achieved by heat-treating under specific conditions to modify the surface of carbon fibers, and based on this knowledge, the present invention was completed.
すなわち、本発明は、炭素繊維表面に超微粒子状二酸化
チタンを均一に付着させ、不活性ガス雰囲気下において
、１５５０〜３１００℃の範囲の温度で熱処理すること
を特徴とする高強度炭素繊維の製造方法に関するもので
ある。That is, the present invention is a method for producing high-strength carbon fibers, which is characterized in that ultrafine titanium dioxide particles are uniformly adhered to the surface of carbon fibers, and then heat-treated at a temperature in the range of 1550 to 3100°C in an inert gas atmosphere. It is about the method.
以下、本発明を詳細に説明する。The present invention will be explained in detail below.
本発明において用いられる炭素繊維は、ピッチ系あるい
はポリアクリロニトリル系のいずれを原料として得られ
たものでもよい。使用する炭素繊維の径は１〜１５μ程
度のものが適している。The carbon fiber used in the present invention may be obtained using either pitch-based or polyacrylonitrile-based raw materials. The carbon fiber used preferably has a diameter of about 1 to 15 microns.
超微粒子状二酸化チタンは、平均粒径５００人以下のも
のを使用するのが好ましいが、特に好ましくは２００人
以下のものである。また、その際の二酸化チタンは、ア
モルファスでも、ルチル型又はアナターゼ型の結晶性の
ものでもかまわない。超微粒子状二酸化チタンを炭素繊
維に付着させる方法としては、二酸化チタン粒子の分散
液を塗布あるいは浸漬することによって行われる。その
際の溶媒としてはアルコール、ケトン、ベンゼン、トル
エン、キシレン、酢酸エチルなどのエステル類が用いら
れる。The ultrafine titanium dioxide particles preferably have an average particle size of 500 particles or less, particularly preferably 200 particles or less. Further, the titanium dioxide used in this case may be amorphous, or may be a rutile type or anatase type crystalline type. Ultrafine titanium dioxide particles are attached to carbon fibers by coating or dipping them in a dispersion of titanium dioxide particles. As the solvent in this case, esters such as alcohol, ketone, benzene, toluene, xylene, and ethyl acetate are used.
この超微粒子状二酸化チタン分散液は、上記溶媒より選
択した溶媒に界面活性剤や分散剤を添加したものであり
、必要ならば物理的分散処理例えば超音波、ポールミル
、ホモジナイザー等により、調製したものでよい。そし
て、二酸化チタンの付着状態は炭素繊維表面に均一分散
させるが、この場合少なくとも二酸化チタン粒子間にす
き間があく状態にすべきである。This ultrafine titanium dioxide dispersion is prepared by adding a surfactant or a dispersant to a solvent selected from the above solvents, and if necessary, it is prepared by physical dispersion treatment such as ultrasound, a pole mill, a homogenizer, etc. That's fine. The adhesion state of titanium dioxide should be such that it is uniformly dispersed on the carbon fiber surface, but in this case, there should be at least a gap between the titanium dioxide particles.
本発明方法で使用する二酸化チタン分散液の濃度は２０
％以下がよいが、好ましくは帆０１−１０％であり、特
に好ましくは０．Ｏｌ〜１％である。浸漬する場合には
そのままつけてもよいが、撹拌した方がよく、特に好ま
しくは超音波をあてるとよい結果が得られる。The concentration of the titanium dioxide dispersion used in the method of the present invention is 20
% or less, preferably 01-10%, particularly preferably 0. It is 1%. In the case of immersion, it may be applied as is, but it is better to stir it, and particularly preferably to apply ultrasonic waves to obtain good results.
この発明の熱処理条件として、使用温度は１５５０〜３
ｌ００゜Ｃの範囲であるが、好ましくは２０００〜３１
００℃、特に好ましくは２０００〜２４００℃の温度範
囲である。この熱処理員度が１５５０℃以上になると、
二酸化チタンが溶けて炭素繊維中に入らないので、補強
効果を得ることができない。また、熱処理温度が３１０
０°Ｃを超えると、二酸化チタンが炭素と反応して生成
した炭化チタンが溶融してしまうので、それ以上強度は
上らず無意味である。この熱処理は不活性ガス雰囲気中
で実施され、その際の不活性ガスは、アルゴン、窒素な
どが通常用いられる。As the heat treatment conditions of this invention, the operating temperature is 1550-3
100°C, preferably 2000-31
The temperature range is 00°C, particularly preferably 2000 to 2400°C. When this heat treatment temperature exceeds 1550℃,
Since titanium dioxide does not melt and enter the carbon fiber, no reinforcing effect can be obtained. In addition, the heat treatment temperature is 310
If the temperature exceeds 0°C, the titanium carbide produced by the reaction of titanium dioxide with carbon will melt, so the strength will not increase any further and it is meaningless. This heat treatment is performed in an inert gas atmosphere, and the inert gas used at that time is usually argon, nitrogen, or the like.
発明の効果
この発明方法によると、炭素繊維は被覆層によって、化
学的に安定するのみならず、機械的強度特に引張強度及
び弾性率において、従来のものよりも３１１１程度向上
したものを製造することができる。Effects of the Invention According to the method of this invention, carbon fibers that are not only chemically stable due to the coating layer, but also have improved mechanical strength, particularly tensile strength and elastic modulus, by about 3111 compared to conventional carbon fibers can be manufactured. Can be done.
この繊維はマイクロエレクトロード、センサー感知部、
電気機器の素材として単独で利用することをはじめ、種
々の用途に好適に用いられる。This fiber is a microelectrode, a sensor sensing part,
It is suitably used for a variety of purposes, including being used alone as a material for electrical equipment.
実施例
次に実施例によりこの発明をさらに詳細に説明するが、
この発明はこれらの例によってなんら限定されるもので
はない。先ず、この発明に用いる分散液を示す。EXAMPLES Next, the present invention will be explained in more detail by examples.
This invention is not limited in any way by these examples. First, the dispersion used in this invention will be described.
参考例１（分散液Ａの調製）
分散溶媒にトルエンを用い、ドデシルベンゼンスルホン
酸ナトリウムを二酸化チタンに対し、３０重量％添加し
た溶液とし、この溶液中の二酸化チタン粒子（平均粒径
２００Ａ）を超音波処理（１５分）によって分散させる
ことにより、次の組成のゾルを得た。Reference Example 1 (Preparation of Dispersion A) Using toluene as a dispersion solvent, a solution was prepared in which 30% by weight of sodium dodecylbenzenesulfonate was added to titanium dioxide, and titanium dioxide particles (average particle size 200A) in this solution were A sol having the following composition was obtained by dispersing by ultrasonication (15 minutes).
成 分
トルエン
含有量
９９．２２重量％
二酸化チタン
０．６重量％
参考例２（分散液Ｂの調製）
分散溶媒にエタノールを用い、１％二酸化チタン分散液
を前記の方法と同様の方法で次の組成のゾルを調製した
。Ingredients Toluene content: 99.22% by weight Titanium dioxide 0.6% by weight Reference example 2 (Preparation of dispersion B) Using ethanol as the dispersion solvent, a 1% titanium dioxide dispersion was prepared in the same manner as described above. A sol with the following composition was prepared.
成
エタノール
二酸化チタン
分
含有量
９８．６７重量％
１．０重量％
ドデシルベンゼンスルホン酸
ナトリウム ０．３３重量％実施例
ｌ
原料の炭素繊維は石油系の残油を熱改質処理して、メソ
フェーズビッチを製造し、溶融紡糸不融化した後、１５
５０゜Ｃで炭化したもので３０００フィラメント、フィ
ラメント径は１２．４μであった。この炭素繊維の単繊
維試験法による引張強度は２１７ｋｙ／ ｍｒａ”、弾
性率は２０．９Ｌ／ ｒａｍ”であった。Synthetic ethanol Titanium dioxide content 98.67% by weight 1.0% by weight Sodium dodecylbenzenesulfonate 0.33% by weight Example 1 The raw material carbon fiber is made by thermally reforming petroleum-based residual oil to form mesophase binder. After manufacturing and melt spinning infusibility, 15
The filament was carbonized at 50°C and had a diameter of 3,000 filaments of 12.4μ. This carbon fiber had a tensile strength of 217 ky/mra'' and an elastic modulus of 20.9 L/ram'' according to the single fiber test method.
この炭素繊維を０，６％ゾル二酸化チタン溶液（分散液
Ａ）に含浸し、１分間超音波を照射し、これを真空乾燥
した後、アルゴン雰囲気中で２０００’Ｏで熱処理した
。作成したフィラメントの引張強度は２８７ｋ９／ ｒ
ａｔｓ”、弾性率５１．２ｔ／ｍ＋＊”であり、明らか
に強度、弾性率が向上した。得られた改質炭素繊維につ
きＸ線回折による分析の結果、表面の二酸化チタンが炭
化チタンに変換されていることが確認された。また、電
子顕微鏡による観察から０．０３μ程度のホールが多数
表面に形成されていた。これは二酸化チタンが炭素繊維
と反応し、炭素繊維中に浸透したためと考えられる。This carbon fiber was impregnated with a 0.6% sol titanium dioxide solution (dispersion A), irradiated with ultrasonic waves for 1 minute, dried in vacuum, and then heat-treated at 2000'O in an argon atmosphere. The tensile strength of the created filament is 287k9/r
ats'' and elastic modulus of 51.2 t/m+*'', clearly improving the strength and elastic modulus. As a result of X-ray diffraction analysis of the obtained modified carbon fiber, it was confirmed that the titanium dioxide on the surface was converted to titanium carbide. Furthermore, observation using an electron microscope revealed that many holes of about 0.03 μm were formed on the surface. This is thought to be because titanium dioxide reacted with the carbon fibers and penetrated into the carbon fibers.
実施例２
原料炭素繊維は、市販のピッチ系炭素繊維をクロロホル
ム溶液中で超音波洗浄を３回、各ｌＯ分行った後、乾燥
させたものを用いた。この炭素繊維は、２０００フィラ
メント、フィラメントｆｆｌｌＯ．１μであった。単繊
維試験法による引張強度は２９２ｋ９／諺が１弾性率は
５６．０ｔ／＋＊ｍ″であった。Example 2 As raw material carbon fibers, commercially available pitch-based carbon fibers were subjected to ultrasonic cleaning three times in a chloroform solution for 10 minutes each time, and then dried. This carbon fiber has 2000 filaments, filaments ffllO. It was 1μ. The tensile strength according to the single fiber test method was 292k9/modulus of elasticity was 56.0t/+*m''.
上記炭素繊維を実施例１と同様の処理を行ったところ引
張強度３２６ｋｇ／ ｒｉｍ”，弾性率５６．ＯＬ／＋
ｕ＋”Ｃ’あった。When the above carbon fiber was treated in the same manner as in Example 1, the tensile strength was 326 kg/rim" and the elastic modulus was 56.OL/+
There was u+"C'.
実施例３
実施例ｌと同様の炭素繊維で．１％ゾル二酸化チタン溶
液（分散液Ｂ）に含浸した。後の処理は実施例ｌと同様
に行った。引張強度は２８０７２９／ ａｍ”、弾性率
は５３．３Ｌ／ｍｍ’であった。Example 3 Using carbon fiber similar to Example 1. It was impregnated with a 1% sol titanium dioxide solution (dispersion B). The subsequent treatments were carried out in the same manner as in Example 1. The tensile strength was 280,729/am'' and the elastic modulus was 53.3 L/mm'.
実施例４
ＰＡＮ系炭素繊維（ ３０００フィラメント、フィラメ
ント径７．７μ、引張強度２７９＆ｇ／ｍｍ’，弾性率
１８．６ｔ／ａｒｍ”）を実施例ｌと同様な方法で処理
した。その結果、改質された炭素繊維は引張強度３２０
ｋ９／ ｒＲが、弾性率４ １ Ｌ／ｉｎ”であった。Example 4 PAN-based carbon fiber (3000 filament, filament diameter 7.7μ, tensile strength 279g/mm', elastic modulus 18.6t/arm") was treated in the same manner as in Example 1. As a result, modification The carbon fiber has a tensile strength of 320
k9/rR had an elastic modulus of 4 1 L/in''.
比較例
分散液に浸す本処理をすることなしに、実施例ｌで用い
た炭素繊維をそのまま２０００℃で炭化した。Comparative Example The carbon fibers used in Example 1 were carbonized as they were at 2000° C. without the main treatment of immersing them in the dispersion liquid.
このフィラメントは引張強度１９９．３Ｊｌｇ／ ｍｒ
ｎ”、弾性率３５．２ｔ／ｍｍ”で、機械的強度の向上
は認められなかった。This filament has a tensile strength of 199.3 Jlg/mr
n'' and elastic modulus of 35.2 t/mm'', no improvement in mechanical strength was observed.
Claims (1)
着させ、不活性ガス雰囲気下において、１５５０〜３１
００℃の範囲の温度で熱処理することを特徴とする高強
度炭素繊維の製造方法。 ２ 超微粒子状二酸化チタンが平均粒径５００Å以下の
ものである請求項１記載の製造方法。 ３ 炭素繊維を二酸化チタンゾル中に浸せきし、超音波
処理して炭素繊維表面に超微粒子状二酸化チタンを均一
に付着させる請求項１記載の製造方法。[Claims] 1. Ultrafine titanium dioxide particles are uniformly adhered to the surface of carbon fibers, and in an inert gas atmosphere, the carbon fibers are heated to 1550 to 31
A method for producing high-strength carbon fiber, characterized by heat treatment at a temperature in the range of 00°C. 2. The manufacturing method according to claim 1, wherein the ultrafine titanium dioxide particles have an average particle size of 500 Å or less. 3. The manufacturing method according to claim 1, wherein the carbon fibers are immersed in a titanium dioxide sol and subjected to ultrasonic treatment to uniformly adhere ultrafine titanium dioxide particles to the surface of the carbon fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5389489A JPH02234973A (en) | 1989-03-08 | 1989-03-08 | Production of high-strength carbon fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5389489A JPH02234973A (en) | 1989-03-08 | 1989-03-08 | Production of high-strength carbon fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02234973A true JPH02234973A (en) | 1990-09-18 |
Family
ID=12955434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5389489A Pending JPH02234973A (en) | 1989-03-08 | 1989-03-08 | Production of high-strength carbon fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02234973A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002180372A (en) * | 2000-12-15 | 2002-06-26 | Toho Tenax Co Ltd | Carbon fiber coated with metal oxide and method for producing the same |
| JP2012184535A (en) * | 2011-02-18 | 2012-09-27 | Toray Ind Inc | Carbon fiber base material and method for producing the same |
-
1989
- 1989-03-08 JP JP5389489A patent/JPH02234973A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002180372A (en) * | 2000-12-15 | 2002-06-26 | Toho Tenax Co Ltd | Carbon fiber coated with metal oxide and method for producing the same |
| JP2012184535A (en) * | 2011-02-18 | 2012-09-27 | Toray Ind Inc | Carbon fiber base material and method for producing the same |
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