Preparation and performance evaluation of novel PVC/OHA/D2EHPA matrix enhanced polymer inclusion membrane
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State Key Laboratory of Separation Membranes and Membrane Processes

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TQ 028.3

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    Abstract:

    In order to solve the problem of low transfer efficiency of polymer inclusion membrane. A kind of matrix enhanced PIM using PVC as a polymer backbone as well as containing both solid and liquid carriers was prepared in this work. N-hydroxyn-octanamide (OHA) was employed as a novel carrier to be immobilized in the pore of the matrix, and the synergistic effect of OHA with the organic extractant di (2-ethylhexyl) phosphate ester (D2EHPA) was used to achieve effective mass transfer. The prepared matrix enhanced PIM was investigated and characterized by SEM, EDS, FTIR, XPS, mechanical properties and mass transfer performance. The results showed that the matrix enhanced PIM with a carrier ratio of 22% OHA + 17% D2EHPA was the most effective for the 10h recovery of 50 mg/L Zn2+, with 59.86% and 51.10% extraction and stripping extraction rates, respectively. The initial mass transfer flux of matrix enhanced PIM was 587.36 mg.m-2.h-1 in five cycles, which was approximately twice that of PIM with only liquid extraction agent (312.64 mg.m-2.h-1). At the end of 5 cycles, the mass transfer flux of matrix enhanced PIM was still higher than that of PIM with only liquid extraction agent.

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History
  • Received:March 08,2022
  • Revised:April 10,2022
  • Adopted:April 11,2022
  • Online: June 10,2022
  • Published:
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