Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structure
Here, we report the marine degradability of polymers with highly ordered structures in natural environmental water using microbial degradation and biochemical oxygen demand (BOD) tests. Three types of elastic fibers (non-porous as-spun, non-porous drawn, and porous drawn) with different highly order...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-12-01
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| Series: | Frontiers in Bioengineering and Biotechnology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fbioe.2023.1303830/full |
| _version_ | 1797382983046397952 |
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| author | Taku Omura Sakura Tsujimoto Sakura Tsujimoto Satoshi Kimura Akira Maehara Taizo Kabe Tadahisa Iwata |
| author_facet | Taku Omura Sakura Tsujimoto Sakura Tsujimoto Satoshi Kimura Akira Maehara Taizo Kabe Tadahisa Iwata |
| author_sort | Taku Omura |
| collection | DOAJ |
| description | Here, we report the marine degradability of polymers with highly ordered structures in natural environmental water using microbial degradation and biochemical oxygen demand (BOD) tests. Three types of elastic fibers (non-porous as-spun, non-porous drawn, and porous drawn) with different highly ordered structures were prepared using poly[(R)-3-hydroxybutyrate-co-16 mol%-4-hydroxybutyrate] [P(3HB-co-16 mol%-4HB)], a well-known polyhydroxyalkanoate. Scanning electron microscopy (SEM) images indicated that microorganisms attached to the fiber surface within several days of testing and degraded the fiber without causing physical disintegration. The results of BOD tests revealed that more than 80% of P(3HB-co-16 mol%-4HB) was degraded by microorganisms in the ocean. The plastisphere was composed of a wide variety of microorganisms, and the microorganisms accumulated on the fiber surfaces differed from those in the biofilms. The microbial degradation rate increased as the degree of molecular orientation and porosity of the fiber increased: as-spun fiber < non-porous drawn fiber < porous drawn fiber. The drawing process induced significant changes in the highly ordered structure of the fiber, such as molecular orientation and porosity, without affecting the crystallinity. The results of SEM observations and X-ray measurements indicated that drawing the fibers oriented the amorphous chains, which promoted enzymatic degradation by microorganisms. |
| first_indexed | 2024-03-08T21:13:14Z |
| format | Article |
| id | doaj.art-4372106ce6394eef839b61a5c525c8e6 |
| institution | Directory Open Access Journal |
| issn | 2296-4185 |
| language | English |
| last_indexed | 2024-03-08T21:13:14Z |
| publishDate | 2023-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Bioengineering and Biotechnology |
| spelling | doaj.art-4372106ce6394eef839b61a5c525c8e62023-12-22T04:28:42ZengFrontiers Media S.A.Frontiers in Bioengineering and Biotechnology2296-41852023-12-011110.3389/fbioe.2023.13038301303830Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structureTaku Omura0Sakura Tsujimoto1Sakura Tsujimoto2Satoshi Kimura3Akira Maehara4Taizo Kabe5Tadahisa Iwata6Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo, JapanGraduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo, JapanGraduate School of Industrial Technology, Nihon University, Narashino, JapanGraduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo, JapanNiigata Research Laboratory, Mitsubishi Gas Chemical Co., Inc., Niigata, JapanGraduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo, JapanGraduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo, JapanHere, we report the marine degradability of polymers with highly ordered structures in natural environmental water using microbial degradation and biochemical oxygen demand (BOD) tests. Three types of elastic fibers (non-porous as-spun, non-porous drawn, and porous drawn) with different highly ordered structures were prepared using poly[(R)-3-hydroxybutyrate-co-16 mol%-4-hydroxybutyrate] [P(3HB-co-16 mol%-4HB)], a well-known polyhydroxyalkanoate. Scanning electron microscopy (SEM) images indicated that microorganisms attached to the fiber surface within several days of testing and degraded the fiber without causing physical disintegration. The results of BOD tests revealed that more than 80% of P(3HB-co-16 mol%-4HB) was degraded by microorganisms in the ocean. The plastisphere was composed of a wide variety of microorganisms, and the microorganisms accumulated on the fiber surfaces differed from those in the biofilms. The microbial degradation rate increased as the degree of molecular orientation and porosity of the fiber increased: as-spun fiber < non-porous drawn fiber < porous drawn fiber. The drawing process induced significant changes in the highly ordered structure of the fiber, such as molecular orientation and porosity, without affecting the crystallinity. The results of SEM observations and X-ray measurements indicated that drawing the fibers oriented the amorphous chains, which promoted enzymatic degradation by microorganisms.https://www.frontiersin.org/articles/10.3389/fbioe.2023.1303830/fullmarine biodegradationpolyhydroxyalkanoatePoly(3-hydroxybutyrate-co-4-hydroxybutyrate)elastic fiberhighly ordered structuremolecular orientation |
| spellingShingle | Taku Omura Sakura Tsujimoto Sakura Tsujimoto Satoshi Kimura Akira Maehara Taizo Kabe Tadahisa Iwata Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structure Frontiers in Bioengineering and Biotechnology marine biodegradation polyhydroxyalkanoate Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) elastic fiber highly ordered structure molecular orientation |
| title | Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structure |
| title_full | Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structure |
| title_fullStr | Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structure |
| title_full_unstemmed | Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structure |
| title_short | Marine biodegradation of poly[(R)-3-hydroxybutyrate-co-4-hydroxybutyrate] elastic fibers in seawater: dependence of decomposition rate on highly ordered structure |
| title_sort | marine biodegradation of poly r 3 hydroxybutyrate co 4 hydroxybutyrate elastic fibers in seawater dependence of decomposition rate on highly ordered structure |
| topic | marine biodegradation polyhydroxyalkanoate Poly(3-hydroxybutyrate-co-4-hydroxybutyrate) elastic fiber highly ordered structure molecular orientation |
| url | https://www.frontiersin.org/articles/10.3389/fbioe.2023.1303830/full |
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