2020 Fiscal Year Final Research Report
Compatible between hydrogen absorption-desorption phenomena from nacreous aragonite and advanced organ transplantation medical care
Project/Area Number |
19K22047
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Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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Allocation Type | Multi-year Fund |
Review Section |
Medium-sized Section 26:Materials engineering and related fields
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Research Institution | Nagaoka University of Technology |
Principal Investigator |
saito hidetoshi 長岡技術科学大学, 工学研究科, 教授 (80250984)
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Project Period (FY) |
2019-06-28 – 2021-03-31
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Keywords | 水素 / 炭酸カルシウム / アラゴナイト / 超高圧 / 吸蔵 / 移植医療 / 分子交換 |
Outline of Final Research Achievements |
The nacre (protein and aragonite) derived from pearl oysters was heat treated in the atmosphere. At the same time as removing the protein, it was heat-treated to 600 ° C. in the air in order to obtain crystal growth of aragonite. When the specific surface area was measured using hydrogen as an atmosphere and the hydrogen adsorption / occlusion characteristics up to 12 MPa were obtained, the specific surface area and hydrogen adsorption were extremely low compared to activated carbon. Aragonite-calcite metamorphosis occurs at approximately 400 ° C. The samples obtained near this transformation temperature were subjected to ultra-high pressure treatment in a hydrogen atmosphere of 400 MPa. Aragonite treated with ultra-high pressure hydrogen released a large amount of hydrogen into water by molecular exchange with pure water. It implies that aragonite ultra-high pressure hydrogen storage phenomenon exists.
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Free Research Field |
材料工学
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Academic Significance and Societal Importance of the Research Achievements |
研究代表者は2002年に窒素含有炭素で水素吸蔵特性を得て以来、炭素系水素吸蔵材料で世界的な吸蔵量チャンピオンデータの中で戦ってきた。ところが先進移植医療分野では炭素よりむしろ炭酸カルシウム(カルサイトとアラゴナイト)の方が生体攻撃性が少なく、よりよい。また水中にて水との分子交換により水素を放出することが肝心だ。 一般的な炭酸カルシウムであるカルサイトは水素を吸わない。ところがアラゴナイトを使うことでその課題がクリアできた。本研究で①長時間にわたり、②きめの細かな水素泡を十分な量にて③外部エネルギーを使用することなく供給できることになり、先進移植医療とのマッチングができるようになった。
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