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Properties of microcapsules containing PC-88A with conneccted spherical pores for Zn(II) extraction
http://hdl.handle.net/10458/00010125
http://hdl.handle.net/10458/00010125ec7b39d2-2c49-4d6a-87f6-b6bdeefa5d54
| 名前 / ファイル | ライセンス | アクション |
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本文 (804.4 kB)
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| アイテムタイプ | 会議発表論文 / Conference Paper(1) | |||||||||||
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| 公開日 | 2021-01-18 | |||||||||||
| タイトル | ||||||||||||
| タイトル | Properties of microcapsules containing PC-88A with conneccted spherical pores for Zn(II) extraction | |||||||||||
| 言語 | en | |||||||||||
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| 言語 | eng | |||||||||||
| 資源タイプ | ||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||||||||
| 資源タイプ | conference paper | |||||||||||
| 著者 |
塩盛, 弘一郎
× 塩盛, 弘一郎
WEKO
5570
× Matsushita, Asuka× Sana, Takashi× Kiyoyama, Shiro× Yoshida, Masahiro |
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| 抄録 | ||||||||||||
| 内容記述タイプ | Abstract | |||||||||||
| 内容記述 | In order to develop an effective extraction process using microcapsules containing extractants, it will be important to increase the surface area of the reaction interface and the diffusibility of the extraction complex in the microcapsules. Microcapsules with large interconnected-spherical pores containing 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC-88A), which is an effective extractant of Zn(II), were prepared by in situ polymerisation from W/O/W emulsions. The large interconnected-spherical pores are open to the outside of the microcapsules and can be freely accessed by water external to the microcapsules. Therefore, the microcapsules with large interconnected-spherical pores are considered to be effective for the microencapsulation of extractants and provide a large surface area because of the many interconnected pores. Divinylbenzene was used as the wall material and polymerised in the organic phase by free radical polymerisation. The microcapsules were successfully prepared. The pore size and the diameter of the microcapsules increased with increasing NaCl concentration in the inner aqueous phase. The diameter of the microcapsules was almost constant at around 230 μm, independent of the concentration of PC-88A in the organic phase. The entrapment efficiency of PC-88A in the microcapsules was higher than 80% in all preparation conditions. The extraction of Zn(II) using microcapsules containing PC-88A was sharply increased at pH higher than 2.0. Zn(II) extracted in the microcapsules was successfully back-extracted at pH lower than 2.0. It was confirmed that two molecules of PC-88A reacted with one Zn(II) ion by quantitative analysis of the relationship between the maximum amounts of Zn(II) extracted and the amount of PC-88A encapsulated in the microcapsules. The extraction rate of Zn(II) was accelerated by the formation of interconnected-spherical pores inside the microcapsules. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
en : Proc. International Solvent Extraction Conference 2011 発行日 2011-10 |
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| 出版タイプ | VoR | |||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||||||
