JPH09282938A - Conductive porous material and manufacture thereof - Google Patents
Conductive porous material and manufacture thereofInfo
- Publication number
- JPH09282938A JPH09282938A JP9514596A JP9514596A JPH09282938A JP H09282938 A JPH09282938 A JP H09282938A JP 9514596 A JP9514596 A JP 9514596A JP 9514596 A JP9514596 A JP 9514596A JP H09282938 A JPH09282938 A JP H09282938A
- Authority
- JP
- Japan
- Prior art keywords
- porous material
- conductive
- conductive porous
- fine
- polyvinyl alcohol
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電極材、発熱体、
帯電防止材料、電磁波遮蔽材料等に応用される導電性材
料に関する。TECHNICAL FIELD The present invention relates to an electrode material, a heating element,
The present invention relates to a conductive material applied to an antistatic material, an electromagnetic wave shielding material and the like.
【０００２】[0002]
【従来の技術】電極材などとして広く用いられている導
電性を有するポリビニルアルコール（ＰＶＡ）のフィル
ムは、ＰＶＡフィルム上に酸化インジウムやポリピロー
ルなどからなる薄層が形成され、或いは、カーボンブラ
ック等の導電性付与剤を混合した原料を用いてフィルム
化されたものである。このようなフィルムは延伸される
とその導電性は著しく低下する。また、これらは二次元
的なフィルムであるため、表面積が大きいことが要求さ
れる分野には対応できなかった。2. Description of the Related Art A polyvinyl alcohol (PVA) film having conductivity, which is widely used as an electrode material, has a thin layer of indium oxide, polypyrrole, or the like formed on the PVA film, or carbon black or the like. It is formed into a film by using a raw material mixed with a conductivity-imparting agent. When such a film is stretched, its conductivity is significantly reduced. Further, since these are two-dimensional films, they cannot be applied to the field requiring a large surface area.
【０００３】[0003]
【発明が解決しようとする課題】本発明は製造が容易
で、表面積が大きく、かつ、延伸しても導電率の低下の
少ない高導電率の導電質材料を提供することを目的とす
る。SUMMARY OF THE INVENTION It is an object of the present invention to provide a highly conductive conductive material which is easy to manufacture, has a large surface area, and has a small decrease in conductivity even when stretched.
【０００４】[0004]
【課題を解決するための手段】本発明は、微細な三次元
網目構造を有する導電性多孔質材料である。The present invention is a conductive porous material having a fine three-dimensional network structure.
【０００５】[0005]
【発明の実施の形態】本発明に係る微細な三次元網目構
造を有する導電性多孔質材料において、三次元網目構造
の大きさとしては、その構造故に形成される孔の直径が
０．５〜５μｍであることが望ましい。ここで、孔の直
径が５μｍを越えると材料としての強度が低下したり、
或いは充分な表面積が得られず、また、孔の直径が０．
５μｍ未満であると、電極材として有効なものとならな
い。なお、孔の直径は、走査型電子顕微鏡或いは光学顕
微鏡で測定する。BEST MODE FOR CARRYING OUT THE INVENTION In the conductive porous material having a fine three-dimensional network structure according to the present invention, the size of the three-dimensional network structure is such that the diameter of the pores formed is 0.5 to It is preferably 5 μm. Here, if the diameter of the hole exceeds 5 μm, the strength as a material is reduced,
Alternatively, a sufficient surface area cannot be obtained, and the diameter of the pore is 0.
If it is less than 5 μm, it is not effective as an electrode material. The diameter of the hole is measured with a scanning electron microscope or an optical microscope.
【０００６】本発明においてポリビニルアルコールは水
溶性を有するため選択されている。従って、この性質が
失われない程度の誘導体化、修飾等は自由に行うことが
できる。また、本発明に係る微細な三次元網目構造を有
する導電性多孔質材料において、孔の存在比（空隙率）
は３０％以上７０％以下であることが望ましい。３０％
未満であると充分な表面積が得られず、７０％超である
と、電極材として必要な強度が得られない。なお、この
値は多孔質材料の嵩密度及び比重とを測定し、これらの
比から求めた値である。In the present invention, polyvinyl alcohol is selected because it has water solubility. Therefore, derivatization, modification, etc. to the extent that this property is not lost can be freely performed. In the conductive porous material having a fine three-dimensional network structure according to the present invention, the abundance ratio of pores (porosity)
Is preferably 30% or more and 70% or less. 30%
If it is less than 70%, a sufficient surface area cannot be obtained, and if it exceeds 70%, the strength required as an electrode material cannot be obtained. In addition, this value is a value obtained by measuring the bulk density and the specific gravity of the porous material and calculating from these ratios.
【０００７】本発明で用いる導電性フィラーとしては、
カーボンブラック、炭素繊維、金属粉、金属繊維、或い
は金属メッキされたフィラー等を挙げることができる。
これらの形状（直径、繊維直径、繊維長等）及び金属の
種類等は目的に応じ適宜選択することが可能である。ま
た、これら導電性フィラーの含有率も同様に目的に応じ
て調整する。As the conductive filler used in the present invention,
Examples thereof include carbon black, carbon fiber, metal powder, metal fiber, and metal-plated filler.
These shapes (diameter, fiber diameter, fiber length, etc.) and the kind of metal can be appropriately selected according to the purpose. Further, the contents of these conductive fillers are also adjusted according to the purpose.
【０００８】なお、本発明において三次元網目構造とは
海綿状の構造を指す。このような構造の場合、導電性フ
ィラーはその網目構造内にのみ存在するため、嵩体積当
たりのフィラー量が少なくても、フィラー同士の距離は
短く、そのため電気的なネットワークが形成されるので
全体としての導電性は非常に高いものとなる。In the present invention, the three-dimensional mesh structure means a spongy structure. In the case of such a structure, since the conductive filler exists only in the mesh structure, the distance between the fillers is short even if the amount of the filler per bulk volume is small, and therefore an electrical network is formed, so that the entire structure is formed. The conductivity is extremely high.
【０００９】また、このような海綿構造は一軸軸延伸に
よって加工されても、生じるひずみの殆どはこの構造が
変形することによって吸収されるので、含有される導電
性フィラー相互の距離には影響が少なく、従って導電率
の低下が少ない。本発明に係る微細な三次元網目構造を
有する導電性多孔質材料はそのまま用いても良いが、電
解重合や気相重合等により導電性高分子を表面に生成さ
せて用いることも可能である。Even if such a sponge structure is processed by uniaxial stretching, most of the generated strain is absorbed by the deformation of the structure, so that the distance between the conductive fillers contained in the sponge structure is not affected. Less, and therefore less decrease in conductivity. The conductive porous material having a fine three-dimensional network structure according to the present invention may be used as it is, but it is also possible to generate a conductive polymer on the surface by electrolytic polymerization, gas phase polymerization or the like and use it.
【００１０】このような微細な三次元網目構造を有する
導電性多孔質材料は例えば次のように容易に作製するこ
とができる（第１法）。ポリビニルアルコール水溶液に
導電性フィラーを添加して分散させ、これを型に流し込
み、型に入れたまま急冷する。この処理によって、ポリ
ビニルアルコール溶液中の水分が氷結するが、その際偏
析が生じる。このように水分が偏析した場所に微小な孔
が形成される。次いで氷点以上に加熱することによって
解凍させる。この氷結−解凍を繰り返すことによって、
孔が成長するとともにゲル化が進行し、網目状組織が形
成されて著しく強度が向上する。これはポリビニルアル
コール分子が孔部の成長によって網目状組織部へ局所的
に濃縮され、配向され、延伸されて結晶化が進むためと
考えられる。The conductive porous material having such a fine three-dimensional network structure can be easily manufactured, for example, as follows (first method). A conductive filler is added to and dispersed in a polyvinyl alcohol aqueous solution, which is poured into a mold and rapidly cooled while being put in the mold. By this treatment, water in the polyvinyl alcohol solution freezes, but segregation occurs at that time. In this way, minute holes are formed at the locations where the water is segregated. Then it is thawed by heating above freezing. By repeating this freezing-thawing,
As the pores grow, gelation progresses, a network structure is formed, and the strength is remarkably improved. It is considered that this is because the polyvinyl alcohol molecules are locally concentrated, oriented, and stretched in the network structure due to the growth of the pores to promote crystallization.
【００１１】また、解凍時には、ポリビニルアルコール
濃度の著しい変化を引き起こさないよう、水分の蒸発
や、結露を生じないような条件で行う必要がある。すな
わち、このとき温度としては５℃〜室温程度でかつ、乾
燥雰囲気で行うことが望ましい。氷結−解凍の繰り返し
回数はその他条件（例えばポリビニルアルコール溶液の
濃度等）にもよるが、５回以上であることが望ましい。
５回未満であると、強度が不足したり、或いは充分な導
電性が得られないことがある。上記のようにして得られ
た導電性多孔質材料はそのまま用いても良いが、必要に
応じて乾燥して用いても良い。Further, at the time of thawing, it is necessary to perform the conditions under which vaporization of water and dew condensation do not occur so as not to cause a remarkable change in polyvinyl alcohol concentration. That is, at this time, it is desirable that the temperature is about 5 ° C. to room temperature and that the operation is performed in a dry atmosphere. The number of times of freezing-thawing depends on other conditions (for example, the concentration of the polyvinyl alcohol solution, etc.), but is preferably 5 times or more.
If it is less than 5 times, the strength may be insufficient, or sufficient conductivity may not be obtained. The conductive porous material obtained as described above may be used as it is, but may be used after drying if necessary.
【００１２】この第１法は有害な有機溶媒等を用いるこ
となく導電性多孔質材料を得ることができる優れた方法
であり、溶剤回収等の手間も不要であるため、この方法
では微細な三次元網目構造を有する導電性多孔質材料を
低コストで得ることができる。なお、この方法によれば
比較的大きい直径を持つ孔（直径：５μｍ程度）を有す
る三次元網目構造を容易に得ることができる。This first method is an excellent method that can obtain a conductive porous material without using a harmful organic solvent and the like, and the trouble of collecting the solvent is not necessary. A conductive porous material having an original network structure can be obtained at low cost. According to this method, it is possible to easily obtain a three-dimensional mesh structure having holes (diameter: about 5 μm) having a relatively large diameter.
【００１３】本発明に係る微細な三次元網目構造を有す
る導電性多孔質材料は、また次のようにして作製するこ
とができる（第２法）。ポリビニルアルコールをジメチ
ルスルホキシド−水混合溶液に溶解し、この溶液に導電
性フィラーを添加して分散させ、これを型に流し込み、
この型に入れたまま急冷し保持する。このとき、ジメチ
ルスルホキシド−水混合溶液は凍結せず、ポリビニルア
ルコールはゲル化するが、このゲルフィルムを水に浸漬
し、ジメチルスルホキシドを水で置換すると、ハイドロ
ゲルフィルムが得られ、これを凍結することにより、ゲ
ル内に微小な細孔が多数形成されて三次元網目構造とな
る。この後冷却しながら真空乾燥を行うことによって微
細な三次元網目構造を有する導電性多孔質材料が得られ
る。The conductive porous material having a fine three-dimensional network structure according to the present invention can be manufactured as follows (second method). Polyvinyl alcohol is dissolved in a dimethylsulfoxide-water mixed solution, a conductive filler is added to this solution and dispersed, and this is poured into a mold,
Hold in this mold by quenching. At this time, the dimethylsulfoxide-water mixed solution does not freeze, and the polyvinyl alcohol gels, but when this gel film is immersed in water and dimethylsulfoxide is replaced with water, a hydrogel film is obtained and frozen. As a result, a large number of minute pores are formed in the gel to form a three-dimensional network structure. After that, vacuum drying is performed while cooling to obtain a conductive porous material having a fine three-dimensional network structure.
【００１４】上記においてジメチルスルホキシド−水混
合溶液はジメチルスルホキシドと水とが容積比で６０対
４０乃至７０対３０のものを用いることが望ましい。す
なわち処理温度が低いほど弾性率が高くなるが、この効
果は凍結が生じてしまうと得られない。ここで、溶媒の
構成比が上記比率である場合、−８０℃においても凍結
しないため、ポリビニルアルコールによるゲル化が充分
に進行し、高弾性のものが得られる。なお、図１に−１
０℃、−４０℃及び−８０℃における混合溶媒作製時の
ジメチルスルホキシド（ＤＭＳＯ）の仕込比と混合溶媒
が凍結するまでの時間（凍結時間）との関係を示す。In the above, it is preferable to use a dimethyl sulfoxide-water mixed solution having a volume ratio of dimethyl sulfoxide and water of 60:40 to 70:30. That is, the lower the processing temperature, the higher the elastic modulus, but this effect cannot be obtained if freezing occurs. Here, when the composition ratio of the solvent is the above ratio, it does not freeze even at −80 ° C., so that gelation with polyvinyl alcohol sufficiently progresses and a highly elastic one is obtained. In addition, in FIG.
The relationship between the charging ratio of dimethyl sulfoxide (DMSO) at the time of preparing a mixed solvent at 0 ° C., −40 ° C., and −80 ° C. and the time until the mixed solvent freezes (freezing time) is shown.
【００１５】なお、ここでジメチルスルホキシドの代わ
りに、水に相溶し、ポリビニルアルコールを溶解する溶
媒であるならば、他の溶媒を適宜用いても良い。このよ
うなものとしてはエチレングリコール、ジメチルホルム
アミド等が挙げられる。冷却において、急冷することが
必要である。この冷却速度が遅いとスピノダール分解と
呼ばれる相分離が進行し、構造不整の原因となる。これ
をできる限り少なくするため、短時間に凍結する必要が
ある。このため、用いる型としてはできる限り熱容量の
小さい、かつ、伝熱性の良好なものを選択し、かつ、冷
蔵庫等を用いて−２０〜−８０℃或いはそれ以下の温度
環境に移すことによって達成することができる。この第
２法によれば冷却処理は２回のみであり工程が少ない。
なお、この方法は直径が１μｍ以下の孔を有する三次元
網目構造を形成するのに適した方法である。Here, instead of dimethylsulfoxide, other solvent may be used as appropriate as long as it is a solvent that is compatible with water and dissolves polyvinyl alcohol. Examples of such substances include ethylene glycol and dimethylformamide. In cooling, rapid cooling is necessary. If this cooling rate is slow, phase separation called spinodal decomposition proceeds, causing structural irregularities. In order to reduce this as much as possible, it is necessary to freeze in a short time. For this reason, it is achieved by selecting a mold having a heat capacity as small as possible and having a good heat transfer property, and transferring the mold to a temperature environment of -20 to -80 ° C or lower using a refrigerator or the like. be able to. According to this second method, the cooling process is performed only twice, and the number of steps is small.
This method is suitable for forming a three-dimensional network structure having holes with a diameter of 1 μm or less.
【００１６】[0016]
《実施例１：第１法による作製》ナカライテスク製のポ
リビニルアルコール（重合度：約２０００、商品番号２
８３−１１）を水に１０ｇ／ lになるよう溶解し、これ
に、ポリビニルアルコールに対して３０重量％になるよ
うライオン製ケッチェンブラックＥＣを添加し、均一に
分散するまで攪拌した。<< Example 1: Preparation by the first method >> Polyvinyl alcohol manufactured by Nacalai Tesque (degree of polymerization: about 2000, product number 2)
(83-11) was dissolved in water to 10 g / l, and Ketjen Black EC manufactured by Lion was added to the solution so that the weight of polyvinyl alcohol was 30% by weight, and the mixture was stirred until uniformly dispersed.
【００１７】次いで、この分散溶液を深さ４ｍｍになる
よう型に流し入れ、直ちに−６０℃に保った冷凍庫に入
れた。３０分後、上記溶液が凍結しているのを確認後、
５℃に保ったシリカゲルデシケーター内で解凍した。こ
の凍結−解凍のサイクルを計５回行い、微細な三次元網
目構造を有する導電性材料を得た。６０℃で８時間乾燥
した後の厚さは２５０μｍであった。このものはフィル
ム状の形態を有し、また延伸性に富むものである。この
ようにして得られた導電性材料の三次元網目構造によっ
て形成されている孔の直径を走査型電子顕微鏡で観察し
たところ４〜６μｍであり、また、空隙率は６０％であ
った。Next, this dispersion solution was poured into a mold so that the depth was 4 mm, and immediately placed in a freezer kept at -60 ° C. After 30 minutes, after confirming that the solution is frozen,
Thaw in a silica gel desiccator kept at 5 ° C. This freeze-thaw cycle was performed 5 times in total to obtain a conductive material having a fine three-dimensional network structure. The thickness after drying at 60 ° C. for 8 hours was 250 μm. This has a film-like form and is highly stretchable. The diameter of the holes formed by the three-dimensional network structure of the conductive material thus obtained was observed by a scanning electron microscope to be 4 to 6 μm, and the porosity was 60%.
【００１８】一方導電率について、幅２ｃｍ、長さ１０
ｃｍのサンプルの短辺に導電性塗料を塗布して測定を行
ったところ、１０3 Ｓ／ｃｍと高い値であった。なお、
このものは電気的に等方性であった。次いで引張強度を
測定した。サンプル幅０．２〜０．５ｃｍ、つかみ間隔
２ｃｍ、引張速度１０ｃｍ／分での引張強度は０．７Ｇ
Ｐａ、このときの弾性率は１０．２ＧＰａであった。ま
た、７倍に一軸延伸を行ったサンプルについても同様に
導電率及び引張強度を測定した。このものは導電率の低
下が少ないにも係わらず、引張強度が増加しており、こ
のように加工後もその優れた特性が失われないことが判
った。On the other hand, regarding the conductivity, the width is 2 cm and the length is 10.
When a conductive coating material was applied to the short side of the cm sample, the measurement was performed, and it was a high value of 10 3 S / cm. In addition,
This was electrically isotropic. The tensile strength was then measured. The sample width is 0.2-0.5 cm, the gripping interval is 2 cm, and the tensile strength at a tensile speed of 10 cm / min is 0.7 G.
Pa, the elastic modulus at this time was 10.2 GPa. Further, the conductivity and the tensile strength of the sample that was uniaxially stretched 7 times were measured in the same manner. It has been found that the tensile strength of this material is increased even though the decrease in conductivity is small, and thus the excellent characteristics are not lost even after processing.
【００１９】《実施例２：第２法による作製》ジメチル
スルホキシド６５容と水３５容とを混合し、これに実施
例１で用いたのと同じポリビニルアルコールを１０ｇ／
lになるよう溶解した。次いで、ポリビニルアルコール
に対して３０重量％となるよう気相成長炭素繊維を添加
し、均一に分散させ、型に厚さ４ｍｍになるよう流し入
れた。上記分散溶液を入れた型を直ちに−８０℃の冷凍
庫に一昼夜保持し、導電性フィラー分散ゲルフィルムを
得た。次いでこのゲルフィルム中の溶媒を水に置換して
ハイドロゲルとし、このものを−２０℃で凍結乾燥し
て、厚さ３ｍｍの導電性多孔質電極材を得た。なお、こ
のとき上記のハイドロゲルフィルムを別途６０℃・８時
間真空乾燥したところ導電性多孔質フィルム（厚さ２５
０μｍ）が得られた。Example 2: Preparation by Second Method 65 volumes of dimethyl sulfoxide and 35 volumes of water were mixed, and 10 g of the same polyvinyl alcohol used in Example 1 was added thereto.
It was dissolved to be l. Next, vapor-grown carbon fibers were added so as to be 30% by weight with respect to polyvinyl alcohol, uniformly dispersed, and poured into a mold to have a thickness of 4 mm. The mold containing the dispersion solution was immediately kept in a freezer at −80 ° C. for a whole day and night to obtain a conductive filler-dispersed gel film. Then, the solvent in this gel film was replaced with water to obtain a hydrogel, which was freeze-dried at -20 ° C to obtain a conductive porous electrode material having a thickness of 3 mm. At this time, the above-mentioned hydrogel film was separately vacuum-dried at 60 ° C. for 8 hours, and the conductive porous film (thickness 25
0 μm) was obtained.
【００２０】このようにして得られた導電性材料を走査
型電子顕微鏡で観察したところ、その孔の直径は０．５
〜１．２μｍであった。また、このものの空隙率は５６
％であった。一方、導電率について実施例１と同様に測
定を行ったところ、１０3 Ｓ／ｃｍと高い値であった。
なお、このものは電気的に等方性であった。When the conductive material thus obtained was observed with a scanning electron microscope, the diameter of the hole was 0.5.
Was 1.2 μm. The porosity of this product is 56.
%Met. On the other hand, when the conductivity was measured in the same manner as in Example 1, it was a high value of 10 3 S / cm.
This was electrically isotropic.
【００２１】このもの及びこれを７倍に一軸延伸を行っ
たサンプルについても実施例１と同様に引張強度を測定
したが、延伸を行ったものは延伸を行わないサンプルの
ほぼ１０倍の強度となり、加工後もその優れた特性が失
われないことが判った。なお、上記と同様に、但し、ジ
メチルスルホキシド−水混合比、及び、冷却処理温度を
変えて得たサンプルの弾性率について図２に示す。図２
より明らかなようにジメチルスルホキシドと水とが容積
比で６０対４０乃至７０対３０のものを用いた場合、高
い弾性率を有する導電性多孔質材料が得られることが判
る。The tensile strength of this sample and that of a sample which was uniaxially stretched 7 times were measured in the same manner as in Example 1. The strength of the stretched sample was about 10 times that of the unstretched sample. However, it was found that the excellent characteristics are not lost even after processing. Note that the elastic moduli of the samples obtained in the same manner as above, except that the dimethyl sulfoxide-water mixing ratio and the cooling treatment temperature were changed, are shown in FIG. FIG.
It is clear that when dimethylsulfoxide and water are used in a volume ratio of 60:40 to 70:30, a conductive porous material having a high elastic modulus can be obtained.
【００２２】[0022]
【発明の効果】本発明に係る導電性多孔質材料は微細な
三次元網目構造、いわゆる海綿構造を有するものであ
る。従って一軸延伸によって加工されても、生じるひず
みの殆どはこの構造が変形することによって吸収され、
含有される導電性フィラー相互の距離に影響が少ないた
め導電率の低下が少ない。The conductive porous material according to the present invention has a fine three-dimensional network structure, a so-called sponge structure. Therefore, even if processed by uniaxial stretching, most of the generated strain is absorbed by the deformation of this structure,
Since there is little influence on the distance between the contained conductive fillers, the decrease in conductivity is small.
【００２３】本発明に係る微細な三次元網目構造を有す
る導電性多孔質材料は、その表面積が大きいことから電
極材に用いた場合最大に利点を発揮するが、その他、導
電性が求められる分野、例えば導体、発熱体、帯電防止
材料や電磁波遮蔽材料などにも応用することが可能であ
る。The conductive porous material having a fine three-dimensional network structure according to the present invention exhibits the greatest advantage when used as an electrode material due to its large surface area, but in other fields where conductivity is required. For example, it can be applied to conductors, heating elements, antistatic materials, electromagnetic wave shielding materials, and the like.
【００２４】また、本発明に係る導電性多孔質材料はそ
の構造故に非常に軽量で、かつ強度が高いものであって
軽量性が求められる分野へ対応することができる。ま
た、フィルム状の形態にすることができるため、シート
型電池、ボタン型電池を始め、シート状の電極を巻いて
作製する円筒型電池や積層電池にも応用することができ
る。なお、本発明に係る導電性多孔質材料内部の空隙を
活物質の保持に利用するならば、極めてコンパクトな電
池を作製することができる。Further, the conductive porous material according to the present invention is extremely lightweight and has high strength because of its structure, and it can be applied to the field where lightness is required. Further, since it can be formed into a film shape, it can be applied to a sheet type battery, a button type battery, a cylindrical type battery manufactured by winding a sheet electrode, and a laminated battery. If the voids inside the conductive porous material according to the present invention are used to hold the active material, an extremely compact battery can be manufactured.
【図１】ジメチルスルホキシド（ＤＭＳＯ）−水混合溶
媒の混合比と凍結時間との関係を表す図である。FIG. 1 is a diagram showing a relationship between a mixing ratio of a dimethyl sulfoxide (DMSO) -water mixed solvent and a freezing time.
【図２】第２法における、ジメチルスルホキシド（ＤＭ
ＳＯ）−水混合比、及び、処理温度を変化させて得たサ
ンプルの弾性率を示す図である。FIG. 2 shows dimethyl sulfoxide (DM
It is a figure which shows the elastic modulus of the sample obtained by changing SO) -water mixing ratio and processing temperature.
Claims (5)
徴とする導電性多孔質材料。1. A conductive porous material having a fine three-dimensional network structure.
質を分散させ、これを冷却して含有する水分を凍結させ
ることを特徴とする導電性多孔質材料の製造方法。2. A method for producing a conductive porous material, characterized in that a conductive substance is dispersed in a polyvinyl alcohol aqueous solution, and this is cooled to freeze the contained water.
これを繰り返すことを特徴とする請求項２に記載の導電
性多孔質材料の製造方法。3. After the freezing step, it is thawed and then frozen again,
This is repeated, The manufacturing method of the electroconductive porous material of Claim 2 characterized by the above-mentioned.
からなる混合液に溶解し、導電性物質を添加して分散さ
せ、その後冷却しながら真空乾燥することを特徴とする
導電性多孔質材料の製造方法。4. A method for producing a conductive porous material, which comprises dissolving polyvinyl alcohol in a mixed solution of an organic solvent and water, adding a conductive substance to disperse it, and then vacuum drying while cooling. Method.
あることを特徴とする請求項４に記載の導電性多孔質材
料の製造方法。5. The method for producing a conductive porous material according to claim 4, wherein the organic solvent is dimethyl sulfoxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9514596A JPH09282938A (en) | 1996-04-17 | 1996-04-17 | Conductive porous material and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9514596A JPH09282938A (en) | 1996-04-17 | 1996-04-17 | Conductive porous material and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09282938A true JPH09282938A (en) | 1997-10-31 |
Family
ID=14129642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9514596A Withdrawn JPH09282938A (en) | 1996-04-17 | 1996-04-17 | Conductive porous material and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09282938A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004359936A (en) * | 2003-05-13 | 2004-12-24 | Showa Denko Kk | Porous product, its production process, and composite material using porous product |
| JP2005526186A (en) * | 2001-08-08 | 2005-09-02 | サーントル ナシオナル ドウ ラ ルシェルシェ シャーンティフィク（セー．エンヌ．エール．エス．） | Synthetic fiber modification method and use thereof |
| JP2011032490A (en) * | 2003-05-13 | 2011-02-17 | Showa Denko Kk | Method for production of porous body |
| US20230194914A1 (en) * | 2021-12-20 | 2023-06-22 | E Ink Corporation | Multi-layer device comprising a repair layer having conductive a hydrogel film or beads |
-
1996
- 1996-04-17 JP JP9514596A patent/JPH09282938A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005526186A (en) * | 2001-08-08 | 2005-09-02 | サーントル ナシオナル ドウ ラ ルシェルシェ シャーンティフィク（セー．エンヌ．エール．エス．） | Synthetic fiber modification method and use thereof |
| JP2004359936A (en) * | 2003-05-13 | 2004-12-24 | Showa Denko Kk | Porous product, its production process, and composite material using porous product |
| JP2011032490A (en) * | 2003-05-13 | 2011-02-17 | Showa Denko Kk | Method for production of porous body |
| US20230194914A1 (en) * | 2021-12-20 | 2023-06-22 | E Ink Corporation | Multi-layer device comprising a repair layer having conductive a hydrogel film or beads |
| US20230197310A1 (en) * | 2021-12-20 | 2023-06-22 | E Ink Corporation | Multi-layer device including a light-transmissive electrode layer comprising a porous mesh or porous spheres |
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