Preparation of Microcapsules Containing PC-88A with Interconnected Spherical Pores and Their Extraction Properties for Zn(II)

• MATSUSHITA Asuka

  Department of Applied Chemistry, University of Miyazaki

• SANA Takashi

  Department of Applied Chemistry, University of Miyazaki

• KIYOYAMA Shiro

  Department of Chemical Science and Engineering, Miyakonojyo National College of Technology

• YOSHIDA Masahiro

  Department of Chemical Engineering, Graduate School of Engineering, Kagoshima University

• SHIOMORI Koichiro

  Department of Applied Chemistry, University of Miyazaki

Bibliographic Information

Other Title

• Preparation of microcapsules containing PC-88A with interconnected spherical pores and their extraction properties for Zn(2)

Abstract

2-Ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC-88A), which is an effective extractant of Zn(II), was microencapsulated by in situ polymerization in a W/O/W emulsion system. Divinylbenzene was used as the wall material and polymerized in the organic phase by free radical polymerization. Microcapsules with large interconnected-spherical pores 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 and was independent of the concentration of PC-88A in the organic phase. The entrapment efficiency of PC-88A in the microcapsules was higher than 80% for all preparation conditions. The extraction of Zn(II) using the microcapsules containing PC-88A sharply increased at pH values greater than 2. Zn(II) extracted in the microcapsules was successfully back-extracted at pH values less than 2. 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.

Journal

• Solvent Extraction Research and Development, Japan

  Solvent Extraction Research and Development, Japan 18 (0), 123-135, 2011

  Japan Association of Solvent Extraction

Keywords

• General Chemical Engineering
• General Chemistry

Details

• CRID: 1390001205743431936
• NII Article ID: 130005056925
• NII Book ID: AA11114608
• DOI: 10.15261/serdj.18.123
• ISSN: 21884765
• ISSN: 13417215
• NDL BIB ID: 11130939
• Web Site: http://id.ndl.go.jp/bib/11130939
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11130939
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed