JP6752469B2 - How to disassemble fiber reinforced plastic - Google Patents
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- JP6752469B2 JP6752469B2 JP2016143722A JP2016143722A JP6752469B2 JP 6752469 B2 JP6752469 B2 JP 6752469B2 JP 2016143722 A JP2016143722 A JP 2016143722A JP 2016143722 A JP2016143722 A JP 2016143722A JP 6752469 B2 JP6752469 B2 JP 6752469B2
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Description
本発明は、繊維強化プラスチックの分解方法に関する。更に詳しくは、本発明は、菌体を用いた環境負荷の低い繊維強化プラスチックの分解方法に関する。 The present invention relates to a method for decomposing a fiber reinforced plastic. More specifically, the present invention relates to a method for decomposing a fiber-reinforced plastic having a low environmental load using bacterial cells.
従来、炭素繊維とマトリックス樹脂との複合材料である炭素繊維強化プラスチック（ＣＦＲＰ）は、鉄やアルミニウム合金等の金属材料よりも強度が高く、軽量であり且つ安価であることから、自動車用途や航空用途等の幅広い分野において用いられている。そして、今後も需要が増加すると考えられている。
その一方で、ＣＦＲＰは自然に分解される材料ではなく、使用後の分解処理が、一般的なプラスチックよりも困難であり、効率の良い分解処理方法やリサイクル方法が模索されている。具体的な処理方法としては、例えば、（ａ）常圧にて、５００〜７００℃程度の高熱で処理する熱分解法、（ｂ）メタノール等のアルコール系溶媒を用い、１０ＭＰａにて、２５０〜３５０℃程度で処理する超臨界流体法、（ｃ）アルカリ金属塩触媒とベンジルアルコール等のアルコール系溶媒を用い、１〜４ＭＰａにて、３００〜４００℃程度で処理する亜臨界流体法、及び（ｄ）アルカリ金属塩触媒とベンジルアルコール等のアルコール系溶媒を用い、常圧にて、２００℃程度で処理する常圧溶解法等が提案されている（例えば、特許文献１及び非特許文献１を参照）。
Conventionally, carbon fiber reinforced plastic (CFRP), which is a composite material of carbon fiber and matrix resin, has higher strength, lighter weight, and lower cost than metal materials such as iron and aluminum alloys, so that it is used for automobiles and aviation. It is used in a wide range of fields such as applications. And it is expected that demand will continue to increase in the future.
On the other hand, CFRP is not a material that decomposes naturally, and its decomposition treatment after use is more difficult than that of general plastics, and an efficient decomposition treatment method and recycling method are being sought. Specific treatment methods include, for example, (a) a thermal decomposition method in which treatment is performed at a high temperature of about 500 to 700 ° C. at normal pressure, and (b) an alcohol solvent such as methanol is used at 10 MPa, 250 to 250. The supercritical fluid method of treating at about 350 ° C., (c) the subcritical fluid method of treating at about 300 to 400 ° C. at 1 to 4 MPa using an alkali metal salt catalyst and an alcohol solvent such as benzyl alcohol, and ( d) A normal pressure dissolution method or the like in which an alkali metal salt catalyst and an alcohol solvent such as benzyl alcohol are used and treated at about 200 ° C. at normal pressure has been proposed (for example, Patent Document 1 and Non-Patent Document 1). reference).
しかしながら、ＣＦＲＰを処理する従来の方法では、高温雰囲気や高圧雰囲気とするために多大なエネルギーが必要であったり、有機溶剤が必要であったりするため、環境負荷が高いという問題があり、その影響も懸念されている。そのため、環境負荷のより低いＣＦＲＰの分解方法が求められているのが現状である。 However, the conventional method of treating CFRP has a problem that the environmental load is high because a large amount of energy is required to create a high temperature atmosphere or a high pressure atmosphere or an organic solvent is required. Is also concerned. Therefore, the current situation is that there is a demand for a method for decomposing CFRP with a lower environmental load.
本発明は、上記実情に鑑みてなされたものであり、菌体を用いた環境負荷の低い繊維強化プラスチックの分解方法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for decomposing a fiber-reinforced plastic having a low environmental load using bacterial cells.
上記問題点を解決するために、請求項１に記載の発明は、繊維強化プラスチックの分解方法であって、バシラス（Ｂａｃｉｌｌｕｓ）属菌、及びアクロモバクター（Ａｃｈｒｏｍｏｂａｃｔｅｒ）属菌のうちの少なくとも一方の菌体の存在下において、繊維強化プラスチックを分解することを要旨とする。
請求項２に記載の発明は、請求項１において、前記繊維強化プラスチックが、炭素繊維強化プラスチック又はガラス繊維強化プラスチックであることを要旨とする。
請求項３に記載の発明は、請求項１又は２において、前記繊維強化プラスチックにおけるマトリックス樹脂が、熱可塑性樹脂であることを要旨とする。
請求項４に記載の発明は、請求項３において、前記熱可塑性樹脂がポリアミド樹脂であることを要旨とする。
In order to solve the above problems, the invention according to claim 1 is a method for decomposing a fiber reinforced plastic, which is at least one of Bacillus spp. And Achromobacter spp. The gist is to decompose fiber reinforced plastic in the presence of bacterial cells.
The gist of the invention according to claim 2 is that the fiber reinforced plastic is a carbon fiber reinforced plastic or a glass fiber reinforced plastic in claim 1.
The gist of the invention according to claim 3 is that the matrix resin in the fiber reinforced plastic is a thermoplastic resin in claim 1 or 2.
The gist of the invention according to claim 4 is that the thermoplastic resin is a polyamide resin in claim 3.
本発明によれば、常温・常圧にて、微生物（特定の菌体）により繊維強化プラスチックを分解処理することができるため、高温雰囲気や高圧雰囲気が必要な従来の処理方法と比較して、環境負荷を大幅に低減化することができる。更には、環境に負荷をかけることなく、樹脂部分及び繊維部分を分離回収することができる。 According to the present invention, fiber reinforced plastics can be decomposed and treated by microorganisms (specific bacterial cells) at normal temperature and pressure, so that compared with conventional treatment methods that require a high temperature atmosphere or a high pressure atmosphere, The environmental load can be significantly reduced. Furthermore, the resin portion and the fiber portion can be separated and recovered without imposing a load on the environment.
ここで示される事項は例示的なものおよび本発明の実施形態を例示的に説明するためのものであり、本発明の原理と概念的な特徴とを最も有効に且つ難なく理解できる説明であると思われるものを提供する目的で述べたものである。 The matters shown here are for exemplifying and exemplifying embodiments of the present invention, and are considered to be the most effective and effortless explanations for understanding the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be.
以下、本発明を詳しく説明する。
本発明の繊維強化プラスチックの分解方法は、バシラス（Ｂａｃｉｌｌｕｓ）属菌、及びアクロモバクター（Ａｃｈｒｏｍｏｂａｃｔｅｒ）属菌のうちの少なくとも一方の菌体の存在下において、繊維強化プラスチックを分解することを特徴とする。
Hereinafter, the present invention will be described in detail.
The method for decomposing a fiber-reinforced plastic of the present invention is characterized by decomposing a fiber-reinforced plastic in the presence of at least one of Bacillus spp. And Achromobacter spp. To do.
上記菌体は、菌体自体、菌体を含む微生物群、菌体やそれを含む微生物群を培地中で生育培養させた培養液、菌体やそれを含む微生物群を凍結乾燥等により処理した粉末等の処理物等の形態で用いることができる。
生育培養の際に用いる生育培地としては、窒素源（例えば、硝酸アンモニウム、硫酸アンモニウム、燐酸アンモニウム、炭酸アンモニウム等）、無機塩（例えば、硫酸マグネシウム、リン酸水素二カリウム、リン酸二水素カリウム、リン酸水素二ナトリウム、リン酸二水素ナトリウム、塩化ナトリウム、塩化カルシウム等）、及び、エキス類（例えば、酵母エキス等）等を含む基本培地等が挙げられる。
この生育培地のｐＨは、４〜９が好ましい。培養温度は、２０〜７０℃が好ましく、より好ましくは２５〜３７℃である。また、培養時間は、２０〜９０日であることが好ましく、より好ましくは３０〜４０日である。
The above-mentioned bacterial cells were treated by freeze-drying or the like, the bacterial cells themselves, the microorganisms containing the bacterial cells, the culture medium in which the bacterial cells and the microorganisms containing the bacterial cells were grown and cultured in a medium, and the bacterial cells and the microorganisms containing the bacterial cells. It can be used in the form of a processed product such as powder.
Growth media used for growth and culture include nitrogen sources (eg, ammonium nitrate, ammonium sulfate, ammonium phosphate, ammonium carbonate, etc.) and inorganic salts (eg, magnesium sulfate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, phosphoric acid). Examples thereof include a basal medium containing disodium hydrogen hydrogen, sodium dihydrogen phosphate, sodium chloride, calcium chloride, etc., and extracts (for example, yeast extract, etc.).
The pH of this growth medium is preferably 4-9. The culture temperature is preferably 20 to 70 ° C, more preferably 25 to 37 ° C. The culture time is preferably 20 to 90 days, more preferably 30 to 40 days.
上記繊維強化プラスチック（ＦＲＰ）としては、炭素繊維強化プラスチック（ＣＦＲＰ）、ガラス繊維強化プラスチック（ＧＦＲＰ）等が挙げられる。特に、本発明においては、繊維強化プラスチックが炭素繊維強化プラスチックであるものとすることができる。
また、上記繊維強化プラスチックとしては、マトリックス樹脂が熱可塑性樹脂（例えば、ポリアミド樹脂、ポリプロピレン、メチルメタアクリレート等）であるものとすることができる。特に、本発明においては、このマトリックス樹脂がポリアミド樹脂であるものとすることができる。
Examples of the fiber reinforced plastic (FRP) include carbon fiber reinforced plastic (CFRP) and glass fiber reinforced plastic (GFRP). In particular, in the present invention, the fiber reinforced plastic can be a carbon fiber reinforced plastic.
Further, as the fiber reinforced plastic, the matrix resin can be a thermoplastic resin (for example, polyamide resin, polypropylene, methyl methacrylate, etc.). In particular, in the present invention, this matrix resin can be a polyamide resin.
繊維強化プラスチックを分解する具体的な処理方法としては、例えば、（１）処理対象となる繊維強化プラスチックを土壌に埋め（既に埋め立てられた繊維強化プラスチックであっても良い）、上述した形態の菌体を土壌に散布することで行う方法や、（２）培養装置内に、上述した生育培地、処理対象となる繊維強化プラスチック、及び上述した形態の菌体を配置することで行う方法等を挙げることができる。尚、培地のｐＨ及び培養温度については、上述の生育培地における各説明を適用することができる。 Specific treatment methods for decomposing the fiber reinforced plastic include, for example, (1) burying the fiber reinforced plastic to be treated in soil (may be a fiber reinforced plastic already buried), and the above-mentioned form of bacteria. Examples include a method of spraying the body on soil, and (2) a method of arranging the above-mentioned growth medium, fiber-reinforced plastic to be treated, and the above-mentioned form of bacterial cells in the culture apparatus. be able to. Regarding the pH of the medium and the culture temperature, the above-mentioned explanations for the growth medium can be applied.
この際、繊維強化プラスチックの形状は特に限定されないが、細かく粉砕したり、フィルム状に加工して表面積を大きくするほど、分解効率を向上させることができる。尚、繊維の回収を目的とする場合には、あまり細かく粉砕しないことが好ましい。
また、生育培地に対する繊維強化プラスチックの配合割合は、特に限定されないが、生育培地を１００質量部とした場合に、２質量部以下（特に０．０１〜０．２質量部、更には０．０２〜０．１質量部）とすることができる。
更に、菌体の添加割合は、特に限定されないが、生育培地を１００体積部とした場合に、１体積部以下（特に０．０１〜０．８質量部、更には０．１〜０．５質量部）とすることができる。
At this time, the shape of the fiber-reinforced plastic is not particularly limited, but the decomposition efficiency can be improved by finely pulverizing or processing into a film to increase the surface area. When the purpose is to recover the fibers, it is preferable not to pulverize them very finely.
The mixing ratio of the fiber reinforced plastic to the growth medium is not particularly limited, but when the growth medium is 100 parts by mass, it is 2 parts by mass or less (particularly 0.01 to 0.2 parts by mass, and further 0.02). ~ 0.1 parts by mass).
Further, the addition ratio of the cells is not particularly limited, but when the growth medium is 100 parts by volume, it is 1 part by volume or less (particularly 0.01 to 0.8 parts by mass, and further 0.1 to 0.5 parts by mass). (Mass part).
以下、実施例により本発明を更に具体的に説明する。
（１）繊維強化プラスチック分解能の評価試験
＜実施例１〜１５＞
表１に示すｐＨに調整された液体培地［ＮＨ４ＮＯ３（０．２ｇ）、Ｋ２ＨＰＯ４（０．１ｇ）、ＮａＨ２ＰＯ４（０．１ｇ）、ＭｇＳＯ４・７Ｈ２Ｏ（０．０２ｇ）、酵母エキス（０．０１ｇ）、水（１００ｍＬ）］に、表１に示す繊維強化プラスチック（ＦＲＰ）フィルム（１×１ｃｍ、０．０２ｇ）を入れ、その後、表１に示す菌体（１００μＬ）を接種し、常圧下、常温（３０℃）にて、３０日間静置培養した。
Hereinafter, the present invention will be described in more detail with reference to Examples.
(1) Evaluation test of fiber reinforced plastic resolution <Examples 1 to 15>
Adjusted to a pH shown in Table 1 liquid medium [NH 4 NO 3 (0.2g) , K 2 HPO 4 (0.1g), NaH 2 PO 4 (0.1g), MgSO 4 · 7H 2 O (0 .02 g), yeast extract (0.01 g), water (100 mL)], put the fiber reinforced plastic (FRP) film (1 x 1 cm, 0.02 g) shown in Table 1, and then the cells shown in Table 1. (100 μL) was inoculated and statically cultured for 30 days at room temperature (30 ° C.) under normal pressure.
尚、表１に示す各ＦＲＰフィルムは、以下のように作製し、滅菌処理されたものである。
（フィルムの作製及び滅菌処理方法）
下記のＣＦＲＰペレット又はＧＦＲＰペレットを１．０ｇ秤量し、蓋付き試験管に入れた。その後、ギ酸を１０ｍＬ程度加え、ペレットが溶解するまで撹拌した。溶解後、シャーレに注ぎ込み、ドラフト内において３時間、７０℃の条件で乾燥させた。次いで、得られたフィルム状物を１×１ｃｍの寸法に切断した。そして、そのフィルムを試験管に入れた後、上記液体培地を５ｍＬ分注し、１２１℃で１５分間の加圧滅菌処理を行い、評価試験に用いた。
（各ペレットの詳細）
ＣＦＲＰペレット；炭素繊維強化プラスチックペレット（東レ株式会社製、「トレカ ３１０１Ｔ−２０Ｖ」、マトリックス樹脂；ポリアミド６６、炭素繊維の含有割合；２０質量％）
ＧＦＲＰペレット；ガラス繊維強化プラスチックペレット（Ｄｕｐｏｎｔ社製、「ザイテル ７０Ｇ３３ＨＳＩＬ」、マトリックス樹脂；ポリアミド６６、ガラス繊維の含有割合；３３質量％）
Each FRP film shown in Table 1 was prepared as follows and sterilized.
(Film production and sterilization method)
1.0 g of the following CFRP pellets or GFRP pellets was weighed and placed in a test tube with a lid. Then, about 10 mL of formic acid was added, and the mixture was stirred until the pellets were dissolved. After dissolution, it was poured into a petri dish and dried in a draft for 3 hours at 70 ° C. Then, the obtained film-like material was cut to a size of 1 × 1 cm. Then, after putting the film in a test tube, 5 mL of the above liquid medium was dispensed, pressure sterilized at 121 ° C. for 15 minutes, and used for an evaluation test.
(Details of each pellet)
CFRP pellets; carbon fiber reinforced plastic pellets (manufactured by Toray Industries, Inc., "Treca 3101T-20V", matrix resin; polyamide 66, carbon fiber content; 20% by mass)
GFRP pellets; glass fiber reinforced plastic pellets (DuPont, "Zytel 70G33HSIL", matrix resin; polyamide 66, glass fiber content; 33% by mass)
＜比較例１〜４（コントロール）＞
菌体の接種を行わなかったこと以外は、実施例１と同様にして、３０日間静置した。
<Comparative Examples 1 to 4 (Control)>
The cells were allowed to stand for 30 days in the same manner as in Example 1 except that the cells were not inoculated.
（２）繊維強化プラスチックの分解率
実施例１〜１５及び比較例１〜４において、評価試験後のＦＲＰフィルムを取り出して重量を測定し、下記式より繊維強化プラスチックの分解率を算出した。その結果を表１に併記する。
分解率＝［（試験前のフィルム重量−試験後のフィルム重量）／試験前のフィルム重量］×１００（％）
(2) Decomposition rate of fiber reinforced plastic In Examples 1 to 15 and Comparative Examples 1 to 4, the FRP film after the evaluation test was taken out, the weight was measured, and the decomposition rate of the fiber reinforced plastic was calculated from the following formula. The results are also shown in Table 1.
Decomposition rate = [(film weight before test-film weight after test) / film weight before test] x 100 (%)
（３）繊維強化プラスチック分解能の画像評価
＜実施例１６＞
ｐＨ７に調整された液体培地［ＮＨ４ＮＯ３（０．２ｇ）、Ｋ２ＨＰＯ４（０．１ｇ）、ＮａＨ２ＰＯ４（０．１ｇ）、ＭｇＳＯ４・７Ｈ２Ｏ（０．０２ｇ）、酵母エキス（０．０１ｇ）、水（１００ｍＬ）］に、ＣＦＲＰペレット［東レ株式会社製、「トレカ ３１０１Ｔ−２０Ｖ」］（０．２ｇ）を入れ、その後、バシラス属菌（１００μＬ）を接種し、常圧下、常温（３０℃）にて、３０日間静置培養した。
その後、実施例１６のＣＦＲＰペレットを液体窒素により凍結させた。その後、カッターで切断し、断面を形成した。次いで、表面及び断面を、グルタルアルデヒド及びオスミウムで固定し、アルコールで脱水した後、白金でコーティングした。そして、実施例１６のペレット表面及び断面をＳＥＭ観察し、その結果を図１〜図４に示した。
尚、図１、図２は実施例１６のペレット表面［倍率；５００倍（図１）、２５００倍（図２）］、図３、図４は実施例１６のペレット断面［倍率；５００倍（図３）、２５００倍（図４）］を示す。
(3) Image evaluation of fiber reinforced plastic resolution <Example 16>
liquid medium adjusted to pH7 [NH 4 NO 3 (0.2g ), K 2 HPO 4 (0.1g), NaH 2 PO 4 (0.1g), MgSO 4 · 7H 2 O (0.02g), CFRP pellets [“Treca 3101T-20V” manufactured by Toray Co., Ltd.] (0.2 g) are added to yeast extract (0.01 g) and water (100 mL)], and then Bacillus (100 μL) is inoculated. The cells were statically cultured for 30 days at room temperature (30 ° C.) under normal pressure.
Then, the CFRP pellet of Example 16 was frozen in liquid nitrogen. Then, it was cut with a cutter to form a cross section. The surface and cross section were then fixed with glutaraldehyde and osmium, dehydrated with alcohol and then coated with platinum. Then, the pellet surface and cross section of Example 16 were observed by SEM, and the results are shown in FIGS. 1 to 4.
1 and 2 show the pellet surface of Example 16 [magnification: 500 times (FIG. 1) and 2500 times (FIG. 2)], and FIGS. 3 and 4 show the pellet cross section of Example 16 [magnification: 500 times (FIG. 2)]. FIG. 3), 2500 times (FIG. 4)] is shown.
＜比較例５＞
菌体の接種を行わなかったこと以外は、実施例１６と同様にして、３０日間静置した。
その後、実施例１６と同様にして、ＳＥＭ観察し、その結果を図５及び図６に示した。 尚、図５、図６は比較例５のペレット断面［倍率；５００倍（図５）、２５００倍（図６）］を示す。
<Comparative example 5>
The cells were allowed to stand for 30 days in the same manner as in Example 16 except that the cells were not inoculated.
Then, SEM observation was carried out in the same manner as in Example 16, and the results are shown in FIGS. 5 and 6. 5 and 6 show the pellet cross section of Comparative Example 5 [magnification: 500 times (FIG. 5) and 2500 times (FIG. 6)].
（４）評価結果
表１によれば、バシラス属菌を接種した実施例１及び実施例３〜７（分解対象物；ＣＦＲＰフィルム）では、分解率が４．４５〜６．９５％であった。また、アクロモバクター属菌を接種した実施例２（分解対象物；ＣＦＲＰフィルム）では、分解率が３．３５％であった。更に、バシラス属菌を接種した実施例８〜１５（分解対象物；ＧＦＲＰフィルム）では、分解率が２．６０〜５．５５％であった。
これに対し、菌体を接種していない比較例１〜４（コントロール）では、それぞれ、分解率は０％であった。
(4) Evaluation Results According to Table 1, the decomposition rates of Examples 1 and 3 to 7 (decomposition target; CFRP film) inoculated with Bacillus spp. Were 4.45 to 6.95%. .. Further, in Example 2 (decomposition target; CFRP film) inoculated with Achromobacter spp., The decomposition rate was 3.35%. Further, in Examples 8 to 15 (decomposition target; GFRP film) inoculated with Bacillus spp., The decomposition rate was 2.60 to 5.55%.
On the other hand, in Comparative Examples 1 to 4 (control) not inoculated with the bacterial cells, the decomposition rate was 0%, respectively.
また、図１及び図２によれば、実施例１６におけるＣＦＲＰペレットの表面には菌体が付着していることが確認できた。そして、その断面においては、図３及び図４に示すように、表面に近い領域において、網目構造が形成されていることが確認できた。
これに対し、菌体の接種を行っていない比較例５におけるＣＦＲＰペレットの断面においては、図５及び図６に示すように、網目構造は形成されていなかった。
これらの画像結果から、網目構造部位は、微生物（菌体）が内部まで浸食した痕跡であると推測することができる。
Further, according to FIGS. 1 and 2, it was confirmed that the bacterial cells were attached to the surface of the CFRP pellet in Example 16. Then, in the cross section, as shown in FIGS. 3 and 4, it was confirmed that the network structure was formed in the region near the surface.
On the other hand, in the cross section of the CFRP pellet in Comparative Example 5 in which the bacterial cells were not inoculated, the network structure was not formed as shown in FIGS. 5 and 6.
From these image results, it can be inferred that the network structure site is a trace of erosion of microorganisms (bacteria) to the inside.
以上のことから、バシラス属菌又はアクロモバクター属菌を用いることで、炭素繊維強化プラスチック及びガラス繊維強化プラスチックを分解できることが確認できた。
そのため、本発明の分解方法によれば、常温・常圧にて、微生物（特定の菌体）により繊維強化プラスチックを分解処理することができ、高温雰囲気や高圧雰囲気が必要な従来の処理方法と比較して、環境負荷を大幅に低減化することができる。
From the above, it was confirmed that carbon fiber reinforced plastic and glass fiber reinforced plastic can be decomposed by using Bacillus spp. Or Achromobacter spp.
Therefore, according to the decomposition method of the present invention, the fiber-reinforced plastic can be decomposed by microorganisms (specific bacterial cells) at normal temperature and pressure, which is different from the conventional treatment method requiring a high temperature atmosphere or a high pressure atmosphere. In comparison, the environmental load can be significantly reduced.
前述の例は単に説明を目的とするものでしかなく、本発明を限定するものと解釈されるものではない。本発明を典型的な実施形態の例を挙げて説明したが、本発明の記述および図示において使用された文言は、限定的な文言ではなく説明的および例示的なものであると理解される。ここで詳述したように、その形態において本発明の範囲または精神から逸脱することなく、添付の特許請求の範囲内で変更が可能である。ここでは、本発明の詳述に特定の構造、材料および実施例を参照したが、本発明をここにおける開示事項に限定することを意図するものではなく、むしろ、本発明は添付の特許請求の範囲内における、機能的に同等の構造、方法、使用の全てに及ぶものとする。 The above examples are for illustration purposes only and are not to be construed as limiting the invention. Although the present invention has been described with reference to typical embodiments, the wording used in the description and illustration of the present invention is understood to be descriptive and exemplary rather than limiting wording. As detailed herein, modifications can be made within the scope of the appended claims without departing from the scope or spirit of the invention in that form. Although specific structures, materials and examples have been referred to herein in detail of the invention, it is not intended to limit the invention to the disclosures herein, but rather the invention is claimed in the accompanying claims. It shall cover all functionally equivalent structures, methods and uses within the scope.
本発明は上記で詳述した実施形態に限定されず、本発明の請求項に示した範囲で様々な変形または変更が可能である。 The present invention is not limited to the embodiments detailed above, and various modifications or modifications can be made within the scope of the claims of the present invention.
本発明の繊維強化プラスチックの分解方法は、廃棄物処理分野やリサイクル分野において好適に用いることができる。 The method for decomposing a fiber-reinforced plastic of the present invention can be suitably used in the fields of waste treatment and recycling.
Claims (1)
前記分解を行う生育培地がｐＨ９の液体培地であり、
前記繊維強化プラスチックが炭素繊維強化プラスチックであり、
前記生育培地を１００質量部とした場合の前記繊維強化プラスチックの配合割合が０．０１〜０．２質量部であり、
前記生育培地を１００体積部とした場合の菌体の添加割合が１体積部以下であり、
分解率が５．２０〜６．５０％であることを特徴とする繊維強化プラスチックの分解方法。 In the method of decomposing fiber reinforced plastic in which the matrix resin is polyamide 66 in the presence of Bacillus spp .
The growth medium for which the decomposition is carried out is a liquid medium having a pH of 9.
The fiber reinforced plastic is a carbon fiber reinforced plastic,
When the growth medium is 100 parts by mass, the blending ratio of the fiber reinforced plastic is 0.01 to 0.2 parts by mass.
When the growth medium is 100 parts by volume, the addition ratio of the bacterial cells is 1 part by volume or less.
A method for decomposing a fiber reinforced plastic, characterized in that the decomposition rate is 5.20 to 6.50% .
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