JP4150447B2 - Fine carbon fiber suspension and paint containing fine carbon fiber - Google Patents
Fine carbon fiber suspension and paint containing fine carbon fiber Download PDFInfo
- Publication number
- JP4150447B2 JP4150447B2 JP23596898A JP23596898A JP4150447B2 JP 4150447 B2 JP4150447 B2 JP 4150447B2 JP 23596898 A JP23596898 A JP 23596898A JP 23596898 A JP23596898 A JP 23596898A JP 4150447 B2 JP4150447 B2 JP 4150447B2
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- suspension
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- carbon fiber
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- 239000000725 suspension Substances 0.000 title claims description 51
- 229920000049 Carbon (fiber) Polymers 0.000 title claims description 47
- 239000004917 carbon fiber Substances 0.000 title claims description 47
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims description 21
- 239000003973 paint Substances 0.000 title claims description 12
- 229920002678 cellulose Polymers 0.000 claims description 35
- 239000001913 cellulose Substances 0.000 claims description 35
- 239000000835 fiber Substances 0.000 claims description 28
- 229920000742 Cotton Polymers 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 15
- 238000010000 carbonizing Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 10
- 229940070527 tourmaline Drugs 0.000 claims description 10
- 229910052613 tourmaline Inorganic materials 0.000 claims description 10
- 239000011032 tourmaline Substances 0.000 claims description 10
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 230000003213 activating effect Effects 0.000 claims description 6
- 239000003610 charcoal Substances 0.000 description 17
- 238000001179 sorption measurement Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 10
- 239000011148 porous material Substances 0.000 description 8
- 238000011056 performance test Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 235000009161 Espostoa lanata Nutrition 0.000 description 5
- 240000001624 Espostoa lanata Species 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000005470 impregnation Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910021536 Zeolite Inorganic materials 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000004566 building material Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000010457 zeolite Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 239000002781 deodorant agent Substances 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910021151 KY-100S Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- JAWMENYCRQKKJY-UHFFFAOYSA-N [3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-ylmethyl)-1-oxa-2,8-diazaspiro[4.5]dec-2-en-8-yl]-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]methanone Chemical compound N1N=NC=2CN(CCC=21)CC1=NOC2(C1)CCN(CC2)C(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F JAWMENYCRQKKJY-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 210000001724 microfibril Anatomy 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 235000019645 odor Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
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Images
Landscapes
- Paints Or Removers (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、微小炭素繊維を含む新規な懸濁液又は塗料に関するものである。とりわけ本発明は、微小炭素繊維を種々の担体表面に容易に固着するのに適した新規な懸濁液又は塗料に関するものである。
【0002】
【従来技術】
炭が脱臭剤あるいは水浄化材として優れた素材であることは知られている。
【0003】
また、近年、環境問題、あるいは健康や美の追求などの面から、様々な炭の用途が広がっている。例えば、竹炭を床下に敷きつめたり、玄関先に消臭剤として置くなどの活用方法もある。
【0004】
【発明が解決しようとする課題】
しかし、このような用途の広がりにもかかわらず、これまでは、例えて言えば「塗れる炭」のような種々の形状の対象物に適用できる機能を兼ね備えた炭、あるいは自由自在に形を変えられる炭といったものは存在しなかった。例えば、竹や木からできた炭は、非常に硬く、加工が困難である。また、種々の形状の対象物への固着のために接着剤を使用すると、接着剤により炭の細孔を塞いでしまい、吸着性能などの炭の基本性能を損なってしまう不都合があった。
【0005】
さらに、環境問題が大きく取り上げられている現在、接着剤を使用した建材などの製品は望ましくない。個人の健康はもちろん、焼却時において自然環境を壊してしまうからである。
【0006】
【課題を解決するための手段】
本発明は上述の問題点を解消した手段を提供するものであり、その要旨は特許請求の範囲に記載の通りである。すなわち、(1)綿繊維を炭化又は炭化・賦活化した微小炭素繊維と、微小繊維状セルロースを分散させた懸濁液であって、前記微小炭素繊維及び前記微小繊維状セルロースの総量に対して、前記微小炭素繊維が50〜80wt%、前記微小繊維状セルロースが50〜20wt%であることを特徴とする懸濁液綿繊維。
【0008】
(2)微小炭素繊維の繊維径が3〜10μmであることを特徴とする上記(1)項に記載の懸濁液。
【0009】
(3)微小繊維状セルロースの繊維径が0.01〜0.1μmであることを特徴とする上記(1)又は(2)項に記載の懸濁液。
【0010】
(4)微小炭素繊維の繊維長が1〜20mmであることを特徴とする上記(1)乃至(3)項のいずれかに記載の懸濁液。
【0011】
(5)微小繊維状セルロースの繊維長が0.5〜20mmであることを特徴とする上記(1)乃至(4)項のいずれかに記載の懸濁液。
【0012】
(6)固形分の含有割合が1〜6wt%であることを特徴とする上記(1)乃至(5)項のいずれかに記載の懸濁液。
【0013】
(7)ゼオライト粒子及び/又はトルマリン粒子を含有せしめたことを特徴とする上記(1)乃至(6)項のいずれかに記載の懸濁液。
【0014】
(8)綿繊維を炭化又は炭化・賦活化した微小炭素繊維と、微小繊維状セルロースを分散させた懸濁液から成ることを特徴とする塗料。
【0015】
(9)ゼオライト粒子及び/又はトルマリン粒子を含有せしめたことを特徴とする上記(8)項に記載の塗料。である。
【0016】
本発明は、塗布、含浸およびスプレー等で種々の形状の対象物に簡単に使用でき、かつ固着性に優れた、微小炭素繊維を含む新規な懸濁液又は塗料の開発に成功したものである。建材の表面に塗布したり、あるいはフィルター用素材としても利用できる。また、本発明は綿繊維から作った柔らかい繊維状の炭に加工を施した微小炭素繊維を含む新規な懸濁液又は塗料を提供し、環境保全にも寄与するものである。
【0017】
本発明の特徴の一つは、いわば接着剤を使用しないで塗れる炭であり、加工しやすく、脱臭効果に優れた、微小炭素繊維を含む新規な懸濁液又は塗料を提供する点にある。
【0018】
微小繊維状セルロースの混入により炭素繊維の分散、飛散および繊維相互の絡み合い不足を解消でき、加工性が良く、炭の使いやすさ、用途を格段に広げることに成功したものである。微小繊維状セルロースとは、パルプや木綿などの天然繊維の強固な水素結合を破壊し、ミクロフィブリル状態にしたものである。通常は、1本の繊維を繊維軸方向に約40,000〜80,000本に引き裂いた状態のものである。
【0019】
本発明によれば、吸着性能などの炭の基本性能と接着性を兼ね備えた炭素繊維固着層を容易に形成することができる。
【0020】
本発明の懸濁液の用途は、フィルター状に成形することで水や空気の浄化に使用できる。
【0021】
また、建材に塗布することで湿度を調整したり、ホルマリン等の臭いを吸着すことができる。何れも炭の吸着機能を利用するもので、木炭ややしがら活性炭等の効果と同じである。しかし、住宅建材等に使用する場合には、粒状、紛状のままでは不便であり、懸濁液にすることで炭の利用が便利になった。
【0022】
また、天然綿を原料に使っているため繊維構造をしており、しかも綿の特徴である中空構造をしているのが特徴である。そのため、繊維が塗布表面に緒みつき固着するという性質を持ち、塗布の際の接着剤が不要となる。つまり、炭の微細な空洞が接着剤により塞がれることもなく、脱臭などの吸着機能も損なわれず、自由な面に塗布して使用することができる。その上、天然繊維のみで構成されているので自然環境にやさしいといえる。
【0023】
ただし、付着性に望まれる条件は使用方法や用途によって様々である。
フィルターのような、圧損を防ぐために薄く塗布したい場合には、固形分の含有割合が少ない方が好ましい。一方、ボード状に成形する場合に固形分の含有割合が少ないと、成形の際の脱水、乾操にエネルギーがかかり経済的に好ましくない。この様に、使用目的によって自由自在に懸濁液の濃度が変えられるのも大きな特徴である。
【0024】
使用方法としては、吹き付け、含浸、塗布、スプレー等により、シート状、フィルター状に成型することができる。
【0025】
吹き付ける方法は、製造も比較的容易で安価である。一方、含浸法は、繊維に侵透し易い反面、含浸槽を常に撹拌しておくといった手間がかかる。また、吹き付ける方法に比べ、脱水、乾操に時間がかかり不便である。
【0026】
また、ボード状にする場合には、懸濁液を容器に流し込み、脱水、乾燥して成型するが、特に結合力を必要とするために微小繊維状セルロースと微小炭素繊維をよくなじませ、均一な分散をすることが好ましい。
【0029】
微小炭素繊維と微小繊維状セルロースの配合割合が5:5より小さいと、得られる成形体に微小炭素繊維の持つ機能が十分に発揮できなくなる傾向がある。
【0030】
本願請求項2に記載の発明は、本願請求項1に記載の発明において、微小炭素繊維の繊維径が3〜10μmであることを特徴とする。
【0031】
木綿の繊維径が10〜20μmであり、これを炭化あるいは炭化・賦活することで、繊維径3〜10μmの微小炭素繊維が得られる。
【0032】
本願請求項3に記載の発明は、本願請求項1又は2に記載の発明において、微小繊維状セルロース繊維径が0.01〜0.1μmであることを特徴とする。
【0033】
微小繊維状セルロースは、繊維径0.01〜0.1μmまでフイブリル化することで、微細な網目構造を形成し、保形性、補強効果を持つ。
【0034】
本願請求項4に記載の発明は、本願請求項1乃至3のいずれかに記載の発明において、微小炭素繊維の繊維長が1〜20mmであることを特徴とする。
【0035】
木綿の繊維長が20〜40mmであり、これを炭化あるいは炭化・賦活することで、繊維長1〜20mmの微小炭素繊維が得られる。
【0036】
本願請求項5に記載の発明は、本願請求項1乃至4のいずれかに記載の発明において、微小繊維状セルロースの繊維長が0.5〜20mmであることを特徴とする。固着性を考慮して、繊維長0.5〜20mmが好ましい。
【0037】
本願請求項6に記載の発明は、本願請求項1乃至5のいずれかに記載の発明において、懸濁液中の固形分の含有割合が1〜6wt%であることを特徴とする。懸濁液中の固形分の含有割合は、1〜6wt%が好ましい。1wt%未満では、懸濁液から成形体を得る際に、微小炭素繊維の量・機能が不十分になる傾向があり、一方、6wt%を越えると、固形分の分散性が悪くなる傾向があるからである。このため、実用的に1〜6wt%の範囲が好ましい。また、しばらく放置しても沈殿しないような懸濁液を作るには、3〜4wt%がより好ましい。
【0038】
本願請求項7に記載の発明は、本願請求項1乃至6のいずれかに記載の発明の懸濁液に、ゼオライト粒子及び/又はトルマリン粒子を含有せしめたことを特徴とする。
【0039】
本発明の懸濁液にゼオライト、トルマリンのような多孔性物質を混合することで更に付加価値がでる。この発明によれば、多孔性物質を自由な形に成形することができ、微小炭素繊維と多孔性物質の複合によってより優れた吸着性能を発揮することができる。その際、これらの粒子は、微小繊維状セルロースおよび微小炭素繊維がバインダーとして結合されるため、粒径は10μm以下のものが好ましい。また、バインダーとしての結合力を妨げない範囲で、混合する必要がある。懸濁液固形分に対し、多い場合でも重量比で1:1程度が好ましい。
【0040】
本願請求項8に記載の発明は、綿繊維を炭化又は炭化・賦活化した微小炭素繊維と、微小繊維状セルロースを分散させた懸濁液から成ることを特徴とする塗料、である。
【0041】
本願請求項9に記載の発明は、本願請求項8に記載の発明の塗料に、ゼオライト粒子及び/又はトルマリン粒子を含有せしめたことを特徴とする。
【0042】
本発明の塗料にゼオライト、トルマリンのような多孔性物質を混合することで更に付加価値がでる。この発明によれば、多孔性物質を自由な形に成形することができ、微小炭素繊維と多孔性物質の複合によってより優れた吸着性能を発揮することができる。その際、これらの粒子は、微小繊維状セルロースおよび微小炭素繊維がバインダー1として結合されるため、粒径は10μm以下のものが好ましい。また、バインダーとしての結合力を妨げない範囲で、混合する必要がある。懸濁液固形分に対し、多い場合でも重量比で1:1程度が好ましい。
【0043】
挿入ボード、また銅を加えることにより防カビ性のもの、銀ゼオライト等を加えることにより抗菌性を付加できる。
【0044】
【実施例】
以下本発明の実施例を説明する。
実施例1
下記の方法により製造した微小炭素繊維8g、微小繊維状セルロース2g、および水240gを混合し、本発明実施例の懸濁液250gを製造した。この懸濁液からシート状成形体を作成し、その吸着性能を調べた。
【0045】
[炭素繊維の製造方法]
天然綿を活性炭素繊維に加工する。繊維の長さは2cm程度の綿花。
炭化の昇温速度を3℃/min程度に維持しながら炭化温度の600℃まで昇温させ、2時間炭化した。その後、昇温速度2℃/min以下で750℃まで昇温させ、賦活を2時間行った。このようにして2日間かけて作った活性炭素繊維の比表面積は900m2 /g。また、よう素吸着量は550g/gであった。
【0046】
[微小繊維状セルロース]
微小繊維状セルロースはダイセル化学工業株式会社製「セリッシュ KY−100S(商品名)」を使用した。
【0047】
[吸着性能試験]
〈試験方法〉
1.上記のようにして製造した活性炭素繊維付着シートを5cm×2.5cm角(重量1g)に切り出し、密閉容器の中に釣り糸で吊した。
また、何も吊さない状態でも実験を行い、ブランクとして考慮した。
2.アンモニア、アセトアルデヒド、酢酸の3%水溶液を容器内にいれ、加熱して気化させた。
3.容器を25℃の室内に静置し、30秒後、5分後、10分後のガス濃度を測定した。
ガス濃度は、検知管を用いて測定した。
その結果を、表1〜3及び図1に示す。
【0048】
【表1】
【0049】
【表2】
【0050】
【表3】
【0051】
実施例2
[接着性試験]
表4に示す割合で原料を混合し、微小炭素繊維と微小繊維状セルロースと水による懸濁液を作った。微小炭素繊維と微小繊維状セルロースは実施例1において用いたものと同じものを使用した。
【0052】
微小繊維状セルロースは市販のものを用いた。表4に示すような割合で原料を混合し、シート状に成形した。セロハンテープをシート表面に付着させ、剥離して、付着したものを目視することで評価した。評価は、付着量が少ない(◎)、付着量がやや少ない(〇)、付着量がやや多い(△)、付着畳が多い(×)の4段階で行った。この時の懸濁液の固形分含有割合は4wt%一定とした。
【0053】
[吸着性能試験]
実施例1と同一の方法により微小炭素繊維と微小繊維状セルロースと水による懸濁液を作った。配合は、表4に示す割合で原料を混合して行った。試験にはアンモニアガスを用い、実施例1と同一の方法によりガス濃度を測定した。
【0054】
評価は、除去率60%以上(◎)、除去率40〜60%(〇)、除去率5〜40%(△)、除去率5%未満(×)の4段階で行った。この時の懸濁液の固形分含有割合は4wt%一定とした。
接着性試験及び吸着性能試験の結果を表4に示す。
【0055】
【表4】
【0056】
実施例3
[付着性試験]
微小炭素繊維と微小繊維状セルロースから成る懸濁液の固形分の含有割合を変えて、付着性を調べた。
固形分の含有割合は1〜6wt%とし、含浸法によりガーゼに塗布した。
また、微小炭素繊維と微小繊維状セルロースの配合割合は8:2と一定にした。
【0057】
ガーゼへの付着量を目視により評価した。評価は、付着量が多い(◎)、付着量がやや多い(〇)、付着量が少ない(△)、ほとんど付かない(×)の4段階で行った。
付着性試験の結果を表5に示す。
【0058】
【表5】
【0059】
実施例4
微小炭素繊維4g、黒トルマリン粉末4g、および微小繊維状セルロース2gを水240gに混合し、本発明実施例の懸濁液を得た。本実施例では、多孔性物質として平均粒径3ミクロンの黒トルマリン粉末を用いた。
【0060】
上記本発明実施例の懸濁液を綿球に塗布し、乾燥後重量を測定し、固形分付着総量が1gになるように製作した。このようにして製作した綿球の吸着性能を調べた。級試験にはアンモニアガスを用い、実施例1と同一の方法によりガス濃度を測定した。吸着性能試験は実施例1と同様にして行い、吸着ガスにはアンモニアを用いた。
【0061】
また、比較として、微小炭素繊維8gおよび微小繊維状セルロース2gを水240gに混合した本発明実施例の懸濁液を綿球に塗布し、上記実施例と同様に固形分付着総量が1gになるように製作した綿球を作成して、上記実施例と同一条件で吸着性能試験を行った。
その試験結果を表6および図2に示す。
【0062】
【表6】
【0063】
【発明の効果】
本発明は、綿繊維から作った炭素繊維と微小繊維状セルロースを分散させた懸濁液である。本発明によって十分な脱臭機能を備え、かつ、加工性、強度および使いやすさも兼ね備えた微小炭素繊維含有懸濁液および塗料を完成したものである。
【図面の簡単な説明】
【図1】本発明実施例の懸濁液から作成した微小炭素繊維を含んだシート状成形体の吸着性能試験の結果を示す図である。
【図2】本発明実施例の懸濁液を塗布して製作した、表面に微小炭素繊維を付着させた綿球の吸着性能試験の結果を示す図である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a novel suspension or paint containing fine carbon fibers. In particular, the present invention relates to a novel suspension or paint suitable for easily fixing microcarbon fibers to various carrier surfaces.
[0002]
[Prior art]
It is known that charcoal is an excellent material as a deodorant or water purification material.
[0003]
In recent years, the use of various charcoal has expanded from the viewpoint of environmental problems or the pursuit of health and beauty. For example, there are ways to use bamboo charcoal under the floor or as a deodorant at the entrance.
[0004]
[Problems to be solved by the invention]
However, in spite of such widespread use, until now, for example, charcoal that has a function that can be applied to objects of various shapes, such as “paintable charcoal”, or the shape can be freely changed. There was no such thing as charcoal. For example, charcoal made from bamboo or wood is very hard and difficult to process. Further, when an adhesive is used for fixing to an object having various shapes, the pores of the charcoal are blocked by the adhesive, and the basic performance of charcoal such as adsorption performance is impaired.
[0005]
In addition, products such as building materials using adhesives are not desirable at present when environmental problems are greatly taken up. This is because the natural environment is destroyed during incineration as well as personal health.
[0006]
[Means for Solving the Problems]
The present invention provides means for solving the above-mentioned problems, and the gist thereof is as described in the claims. That is, (1) a suspension in which fine carbon fibers obtained by carbonizing or carbonizing / activating cotton fibers and fine fibrous cellulose are dispersed, with respect to the total amount of the fine carbon fibers and the fine fibrous cellulose. Suspension cotton fiber , wherein the fine carbon fiber is 50 to 80 wt% and the fine fibrous cellulose is 50 to 20 wt% .
[0008]
( 2 ) The suspension according to (1 ) above, wherein the fine carbon fiber has a fiber diameter of 3 to 10 μm.
[0009]
( 3 ) The suspension according to (1) or (2) above, wherein the fiber diameter of the microfibrous cellulose is 0.01 to 0.1 μm.
[0010]
( 4 ) The suspension according to any one of (1) to ( 3 ) above, wherein the fine carbon fiber has a fiber length of 1 to 20 mm.
[0011]
( 5 ) The suspension according to any one of (1) to ( 4 ) above, wherein the fiber length of the microfibrous cellulose is 0.5 to 20 mm.
[0012]
( 6 ) The suspension according to any one of (1) to ( 5 ) above, wherein the solid content is 1 to 6 wt%.
[0013]
( 7 ) The suspension according to any one of (1) to ( 6 ) above, wherein zeolite particles and / or tourmaline particles are contained.
[0014]
( 8 ) A coating material comprising fine carbon fibers obtained by carbonizing or carbonizing / activating cotton fibers and a suspension in which fine fibrous cellulose is dispersed.
[0015]
( 9 ) The paint as described in the above item ( 8 ), which contains zeolite particles and / or tourmaline particles. It is.
[0016]
The present invention has succeeded in developing a novel suspension or paint containing fine carbon fibers that can be easily used for objects of various shapes by coating, impregnation, spraying, etc., and has excellent adhesion. . It can be applied to the surface of building materials or used as a filter material. In addition, the present invention provides a novel suspension or paint containing fine carbon fibers obtained by processing soft fibrous charcoal made from cotton fibers, and contributes to environmental conservation.
[0017]
One of the features of the present invention is to provide a novel suspension or paint containing fine carbon fibers that is charcoal that can be applied without using an adhesive, is easy to process, and has an excellent deodorizing effect.
[0018]
The incorporation of microfibrous cellulose can solve the dispersion and scattering of carbon fibers and the shortage of entanglement between fibers, has good workability, and has succeeded in greatly expanding the ease of use and application of charcoal. Microfibrous cellulose is obtained by breaking strong hydrogen bonds of natural fibers such as pulp and cotton into a microfibril state. Usually, it is a state in which one fiber is torn into about 40,000 to 80,000 in the fiber axis direction.
[0019]
ADVANTAGE OF THE INVENTION According to this invention, the carbon fiber fixed layer which has the basic performance of carbon | charcoal, such as adsorption | suction performance, and adhesiveness can be formed easily.
[0020]
The use of the suspension of the present invention can be used to purify water and air by forming it into a filter shape.
[0021]
Moreover, humidity can be adjusted by applying to building materials, and odors, such as formalin, can be adsorbed. Both use the charcoal adsorption function and have the same effect as charcoal or coconut charcoal. However, when used for residential building materials, etc., it is inconvenient if it is in granular or powder form, and the use of charcoal has become convenient by making it into a suspension.
[0022]
In addition, since natural cotton is used as a raw material, it has a fiber structure and has a hollow structure that is characteristic of cotton. Therefore, the fiber has the property that it adheres and adheres to the application surface, and an adhesive is not required for application. That is, the fine cavities of charcoal are not blocked by the adhesive, and the adsorbing function such as deodorization is not impaired, and can be applied and used on a free surface. In addition, since it is composed of only natural fibers, it can be said to be friendly to the natural environment.
[0023]
However, conditions desired for adhesion vary depending on the method of use and application.
When a thin coating is desired to prevent pressure loss, such as a filter, it is preferable that the solid content is small. On the other hand, when it is formed into a board shape, if the solid content is small, energy is required for dehydration and drying during molding, which is economically undesirable. Thus, it is a great feature that the concentration of the suspension can be freely changed according to the purpose of use.
[0024]
As a method of use, it can be formed into a sheet shape or a filter shape by spraying, impregnation, coating, spraying or the like.
[0025]
The spraying method is relatively easy and inexpensive to manufacture. On the other hand, the impregnation method easily infiltrates the fiber, but it takes time and effort to always stir the impregnation tank. Moreover, compared with the spraying method, dehydration and drying are time-consuming and inconvenient.
[0026]
In the case of a board shape, the suspension is poured into a container, dehydrated, dried and molded. Especially, since a binding force is required, the fine fibrous cellulose and the fine carbon fiber are mixed well, and uniform. It is preferable to carry out such dispersion.
[0029]
The mixing ratio of the fine small carbon fibers and microfibrillated cellulose 5: 5 and less than tend to functions of fine carbon fibers in the molded body obtained can not be sufficiently exhibited.
[0030]
Invention of
[0031]
The fiber diameter of cotton is 10 to 20 μm. By carbonizing or carbonizing / activating this, fine carbon fibers with a fiber diameter of 3 to 10 μm are obtained.
[0032]
The invention described in claim 3 of the present application is characterized in that in the invention described in
[0033]
Microfibrous cellulose fibrillates to a fiber diameter of 0.01 to 0.1 μm to form a fine network structure and has shape retention and reinforcing effects.
[0034]
Invention of
[0035]
Cotton has a fiber length of 20 to 40 mm, and carbonized or carbonized / activated to obtain fine carbon fibers having a fiber length of 1 to 20 mm.
[0036]
The invention according to claim 5 of the present application is characterized in that, in the invention according to any one of claims 1 to 4 , the fiber length of the microfibrous cellulose is 0.5 to 20 mm. Considering the fixing property, the fiber length is preferably 0.5 to 20 mm.
[0037]
The invention according to
[0038]
The invention described in claim 7 is characterized in that zeolite particles and / or tourmaline particles are contained in the suspension according to any one of claims 1 to 6 of the present application.
[0039]
Additional value can be obtained by mixing a porous material such as zeolite or tourmaline with the suspension of the present invention. According to this invention, the porous material can be formed into a free shape, and more excellent adsorption performance can be exhibited by the composite of the fine carbon fiber and the porous material. In this case, these particles are preferably those having a particle size of 10 μm or less because fine fibrous cellulose and fine carbon fibers are bound as a binder. Moreover, it is necessary to mix in the range which does not disturb the binding force as a binder. Even when the amount is larger than the solid content of the suspension, the weight ratio is preferably about 1: 1.
[0040]
The invention according to
[0041]
The invention described in claim 9 of the present application is characterized in that zeolite paint and / or tourmaline particles are contained in the paint of the invention described in
[0042]
Further added value can be obtained by mixing a porous material such as zeolite and tourmaline with the paint of the present invention. According to this invention, the porous material can be formed into a free shape, and more excellent adsorption performance can be exhibited by the composite of the fine carbon fiber and the porous material. In that case, since these microparticles | fine-particle cellulose and microcarbon fiber are couple | bonded as the binder 1, those with a particle size of 10 micrometers or less are preferable. Moreover, it is necessary to mix in the range which does not disturb the binding force as a binder. Even when the amount is larger than the solid content of the suspension, the weight ratio is preferably about 1: 1.
[0043]
An antibacterial property can be added by adding an insert board or anti-mold by adding copper, silver zeolite or the like.
[0044]
【Example】
Examples of the present invention will be described below.
Example 1
8 g of fine carbon fibers produced by the following method, 2 g of fine fibrous cellulose, and 240 g of water were mixed to produce 250 g of the suspension of the inventive example. A sheet-like molded body was prepared from this suspension, and its adsorption performance was examined.
[0045]
[Method for producing carbon fiber]
Process natural cotton into activated carbon fiber. The length of the fiber is about 2cm cotton.
While maintaining the heating rate of carbonization at about 3 ° C./min, the temperature was raised to the carbonization temperature of 600 ° C. and carbonized for 2 hours. Then, it heated up to 750 degreeC with the temperature increase rate of 2 degrees C / min or less, and activated for 2 hours. The specific surface area of the activated carbon fiber thus produced over 2 days is 900 m 2 / g. Further, the iodine adsorption amount was 550 g / g.
[0046]
[Microfibrous cellulose]
As the microfibrous cellulose, “Cerish KY-100S (trade name)” manufactured by Daicel Chemical Industries, Ltd. was used.
[0047]
[Adsorption performance test]
<Test method>
1. The activated carbon fiber-attached sheet produced as described above was cut into a 5 cm × 2.5 cm square (weight 1 g) and suspended in a sealed container with fishing line.
In addition, the experiment was carried out in a state where nothing was suspended, and was considered as a blank.
2. A 3% aqueous solution of ammonia, acetaldehyde, and acetic acid was placed in a container and heated to vaporize.
3. The container was allowed to stand in a room at 25 ° C., and the gas concentration after 30 seconds, 5 minutes, and 10 minutes was measured.
The gas concentration was measured using a detector tube.
The results are shown in Tables 1 to 3 and FIG.
[0048]
[Table 1]
[0049]
[Table 2]
[0050]
[Table 3]
[0051]
Example 2
[Adhesion test]
The raw materials were mixed at a ratio shown in Table 4 to prepare a suspension of fine carbon fibers, fine fibrous cellulose, and water. The same fine carbon fibers and fine fibrous cellulose as those used in Example 1 were used.
[0052]
A commercially available fine fibrous cellulose was used. The raw materials were mixed at a ratio as shown in Table 4 and formed into a sheet shape. The cellophane tape was adhered to the sheet surface, peeled off, and the adhered material was visually evaluated. The evaluation was performed in four stages: a small amount of adhesion ((), a little amount of adhesion (◯), a little amount of adhesion (Δ), and a large amount of adhesion tatami (x). The solid content ratio of the suspension at this time was fixed at 4 wt%.
[0053]
[Adsorption performance test]
A suspension of fine carbon fibers, fine fibrous cellulose, and water was prepared in the same manner as in Example 1. The blending was performed by mixing the raw materials at the ratio shown in Table 4. Ammonia gas was used for the test, and the gas concentration was measured by the same method as in Example 1.
[0054]
The evaluation was performed in four stages: a removal rate of 60% or more (◎), a removal rate of 40 to 60% (◯), a removal rate of 5 to 40% (Δ), and a removal rate of less than 5% (×). The solid content ratio of the suspension at this time was fixed at 4 wt%.
Table 4 shows the results of the adhesion test and the adsorption performance test.
[0055]
[Table 4]
[0056]
Example 3
[Adhesion test]
The adhesiveness was examined by changing the solid content of the suspension composed of fine carbon fibers and fine fibrous cellulose.
The solid content was set to 1 to 6 wt%, and applied to gauze by an impregnation method.
The blending ratio of the fine carbon fiber and the fine fibrous cellulose was kept constant at 8: 2.
[0057]
The amount attached to the gauze was visually evaluated. The evaluation was performed in four stages: a large amount of adhesion (、), a little amount of adhesion (◯), a small amount of adhesion (Δ), and a little adhesion (×).
The results of the adhesion test are shown in Table 5.
[0058]
[Table 5]
[0059]
Example 4
4 g of fine carbon fibers, 4 g of black tourmaline powder, and 2 g of fine fibrous cellulose were mixed with 240 g of water to obtain a suspension of the example of the present invention. In this example, black tourmaline powder having an average particle size of 3 microns was used as the porous material.
[0060]
The suspension of the above-described embodiment of the present invention was applied to a cotton ball, and after drying, the weight was measured, and the total amount of solid content was 1 g. The adsorption performance of the cotton balls thus produced was examined. In the class test, ammonia gas was used, and the gas concentration was measured by the same method as in Example 1. The adsorption performance test was performed in the same manner as in Example 1, and ammonia was used as the adsorption gas.
[0061]
For comparison, a suspension of the present invention example in which 8 g of fine carbon fibers and 2 g of fine fibrous cellulose were mixed with 240 g of water was applied to a cotton ball, and the total amount of solid content adhered was 1 g as in the above examples. Thus produced cotton balls were subjected to an adsorption performance test under the same conditions as in the above examples.
The test results are shown in Table 6 and FIG.
[0062]
[Table 6]
[0063]
【The invention's effect】
The present invention is a suspension in which carbon fibers made from cotton fibers and fine fibrous cellulose are dispersed. According to the present invention, a fine carbon fiber-containing suspension and a paint having a sufficient deodorizing function and having processability, strength and ease of use are completed.
[Brief description of the drawings]
FIG. 1 is a view showing the results of an adsorption performance test of a sheet-like molded body containing fine carbon fibers prepared from a suspension according to an embodiment of the present invention.
FIG. 2 is a diagram showing the results of an adsorption performance test of a cotton ball manufactured by applying a suspension according to an embodiment of the present invention and having fine carbon fibers attached to the surface.
Claims (9)
前記微小炭素繊維及び前記微小繊維状セルロースの総量に対して、前記微小炭素繊維が50〜80wt%、前記微小繊維状セルロースが50〜20wt%であることを特徴とする懸濁液。A suspension in which fine carbon fibers obtained by carbonizing or carbonizing / activating cotton fibers and fine fibrous cellulose are dispersed ,
Suspension characterized in that the fine carbon fiber is 50 to 80 wt% and the fine fibrous cellulose is 50 to 20 wt% with respect to the total amount of the fine carbon fiber and the fine fibrous cellulose .
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|---|---|---|---|
| JP23596898A JP4150447B2 (en) | 1998-08-21 | 1998-08-21 | Fine carbon fiber suspension and paint containing fine carbon fiber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23596898A JP4150447B2 (en) | 1998-08-21 | 1998-08-21 | Fine carbon fiber suspension and paint containing fine carbon fiber |
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| JP4150447B2 true JP4150447B2 (en) | 2008-09-17 |
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| AUPQ707900A0 (en) * | 2000-04-20 | 2000-05-18 | Hutton, Lawrence | Coating composition |
| CN100336951C (en) * | 2005-10-28 | 2007-09-12 | 西北工业大学 | Antibacterial hollow activated carbon fiber of negative ion, and preparation method |
| JP6532289B2 (en) * | 2015-05-15 | 2019-06-19 | 丸三産業株式会社 | Method of manufacturing cotton fiber aggregate |
| JP7711896B2 (en) * | 2022-05-13 | 2025-07-23 | 穴織カーボン株式会社 | Carbon fiber-containing paint and machine parts coated with the paint |
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