ポスター発表
- 第3日 6月24日（金） P会場（501，502，503）
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3P-34 PDF
卓上MALDI-MSを用いた分解性バイオナイロンの海洋分解特性の評価
Marine degradation characteristics of a newly designed degradable bionylon were investigated by using benchtop MALDI-MS series, MALDI-8020 (MALDI-TOF MS) and MALDImini-1 (MALDI-DIT MS). The bionylon consists of itaconic acid and hexamethylene diamine, and has photocleavable pyrrolidone rings. Photodegradation of the bionylon immersed in seawater was performed by the exposure to sunlight with/without marine sediment. Through the photodegradation of bionylon, the complete dissolution in seawater took place in 2 weeks. Four-types polymers could be detected from the seawater containing degradative products of the bionylon, and these four-types polymers could be assigned to have different terminal structures. MSn analysis using MALDImini-1 supported the estimated terminal structures. Interestingly, the bionylon immersed in seawater with marine sediment showed smaller-sized polymers compared to that without marine sediment. This may indicate that the existence of microorganisms in marine sediment facilitate the decomposition of the bionylon, Polymer profiling obtained by benchtop MALDI-TOF MS is useful in analyzing the degradation characteristics of bionylon. An elucidation of decomposed bionylon can be supported by MSn measurements by MALDI-DIT MS. This offers the wide application of MALDI-MS for analyzing degraded bioplastic polymers.