イリタニ コウヘイ
  入谷 康平
   所属   工学部 応用化学科
   職種   助教
言語種別 英語
発行・発表の年月 2021/01
形態種別 学術論文
査読 査読あり
標題 Fabrication and Biodegradability of Starch Cell-Plastics as Recyclable Resources
執筆形態 共著
掲載誌名 Applied Sciences
掲載区分国外
出版社・発行元 MDPI
巻・号・頁 11,pp.847
総ページ数 10
著者・共著者 Akihito Nakanishi, Kohei Iritani, Yuri Sakihama, Marina Watanabe, Ayano Mochiduki, Akane Tsuruta, Syunta Sakamoto, Ayami Ota
概要 Recently, cell-plastics, which are composed of unicellular green algal cells and biodegradable compounds as ingredients and fillers, have been suggested as carbon-recyclable materials instead of petroleum-based plastics. In this study, cell-plastics, fabricated with Chlamydomonas reinhardtii as an ingredient and a mixture of two types of starches (raw and oxidized starches) as a filler, were successfully stabilized as independent structures despite the quantity of algal cells being nine times more than that of starch. All starch cell-plastics were water repellent, possibly due to their bumpy surface structures. The starch cell-plastic, composed of 50% cells and 50% starch (1.5:1 of oxidized starch versus raw starch), showed 327 ± 52 MPa as Young’s modulus and 6.45 ± 1.20 MPa as tensile strength, indicating the possibility to be a suitable replacement for petroleum-based plastics. Additionally, all starch cell-plastics showed water-repellency and maintained those structures dipped in phosphate-buffered saline buffer as a water environment for 24 h, meaning that all starch cell-plastics had evaluable water resistance. On the other hand, by adding α-amylase, all starch cell-plastics were collapsed and lost the weight efficiently, indicated their biodegradability. This is the first paper to describe starch cell-plastics from their fabrication to biodegradation.
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