| 研究課題/領域番号 |
22K20487
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| 研究種目 |
研究活動スタート支援
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| 配分区分 | 基金 |
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| 審査区分 |
0401:材料工学、化学工学およびその関連分野
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| 研究機関 | 国立研究開発法人日本原子力研究開発機構 |
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研究代表者 |
Micheau Cyril 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 物質科学研究センター, 博士研究員 (70961291)
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| 研究期間 (年度) |
2022-08-31 – 2024-03-31
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| 研究課題ステータス |
交付 (2022年度)
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| 配分額 *注記 |
2,860千円 (直接経費: 2,200千円、間接経費: 660千円)
2023年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
2022年度: 1,430千円 (直接経費: 1,100千円、間接経費: 330千円)
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| キーワード | Flotation / Malonamide / Foam / Interface / Synthesis |
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| 研究開始時の研究の概要 |
This work aims to develop an ion flotation IFF system for separation of metal ions and to improve knowledge about the interfacial molecular structure of foams based on SANS and reflectometry techniques. The new surfactant system should show good performances in terms of ionic selectivity and process implementation. This is due to an original surfactant design consisting of an alkyl polyethoxylated chain grafted to a malonamide group. Development of this eco-friendly IFF process may replace the classical liquid-liquid extraction method in many applications due to the solvent-free system.
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| 研究実績の概要 |
This work aims to develop a new surfactant system for the extraction and separation of rare earth elements and/or platinum group metals using the ion foam flotation process. For this purpose, synthesis and characterisation of a new malonamide polyethoxylated surfactant is consider. For the synthesis, two main routes are planned: (i) esterification between the polyethoxylated carboxylic acid surfactant AKYPO LS-O90 and the N(1), N(3)-Bis(2-hydroxyethyl)malonamide, and (ii) alkylation between malonamide molecule and the polyethoxylated alcohol surfactant BrijO10 (or Brij S10). Reactants have been ordered and received, and the characterisation of surfactants were performed in term of purity, pKa and micelle surface charge. Additional synthesis routes are being consider in order to reduce reactant cost and synthesis steps. For the characterisation of the process in term of flotation efficiency and microstructure through SANS and NR analyses, dedicated columns (and flowmter) were designed, ordered and received. Technical feasibility of SANS experiments on foam with the new column has been demonstrated with a model surfactant system. NR measurement on malonamide standard systems has been performed at J-PARC, MLF, as a preliminary experiment and had demonstrated the feasibility of analysing liquid-air interfaces. Finally, these preliminary analyses allowed redacting and submitting two articles in peer reviewed journal.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
3: やや遅れている
理由
Synthesis of the new surfactant system has not been completed yet due to delay and unavailability of the reactants.
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| 今後の研究の推進方策 |
Future work will focus on the synthesis of the surfactant system and its characterisation (purity, pKa, cmc, foaming properties). NR experiments on surfactant systems (Akypo LS-O90 and Brij O10) are planned from at J-PARC and will give basic data for the analysis of the new surfactant system after its synthesis. Business trip at ICSM (France) is planned during June, for surface tension measurement and foam analysis of the new surfactant system.
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