Preparation and Characteristics of Heterogeneous Cation Exchange Membrane : 1. Mixing Ratio of Matrix and Ion Exchange Resin

PE계 불균질 양이온 교환막의 제조와 특성:1.결합제와 이온교환수지의 비율에 따른 영향

  • Received : 1996.08.12
  • Accepted : 1996.11.11
  • Published : 1996.12.10

Abstract

Heterogeneous cation exchange membrane(HCEM) was prepared with LLDPE(Linear Low Density Poly-ethylene) as binder, powdered cation exchange resins($diameter{\leq}149{\mu}m$) as ion-exchange material and glycerol as additive for electrodialysis and electrodeionization system. The weight ratio of (binder/ion exchange)/glycerol was (60%/40%)/5%, (55%/45%)/5%, (50%/50%)/5% and (40%/60%)/5%. The characterization of prepared HCEM was evaluated on mechanical, electrochemical, morphology and ion permeable properties. It was compared with commercial membrane. Electrochemical properties of HCEM of (50%/50% )/5% were very similar to value of IONPURE(commercial membrane), in which ion exchange capacity, ion transfer number and membrane resistance were to be 1.733meq/g, 0.96 and $16.08{\Omega}/cm^2$, respectively. Ion permeability of the membrane was better than that of IONPURE membrane. Compared with IONPURE membrane, the HCEM had a higher tensile strength and lower elongation and modulus, in which HCEM had tensile strength of $62.33kg/cm^2$, elongation of 87.42% and modulus of $658.53kg/cm^2$. The HCEM of (50%/50% )15% was optimum combination.

Keywords

References

  1. U. S. Pat. 2,636,851 W. Juda;W. A. McRae
  2. Membrane Seperations Technology D. Noble Richard;S. Alexander Stern
  3. 膜學實驗法 中恒正辛(編)
  4. 日化 v.2 ポリプロピレン系不均質陽イオン交換膜 田村紀義;恒花秀武
  5. Colloid and Polymer Sic v.256 T. Sato;R. Izou
  6. PCT Int. Appl WO 94. 06,850 Heterogeneous Membrane and Method Giuffrida
  7. Synthetic Polymeric Membranes R. E. Kesting
  8. Desalination v.59 George P. Simon
  9. イオン交換膜 八幡屋正
  10. J. membr. Sci. v.8 E. Molau Gunther
  11. J. Am. Chem. Soc. v.72 W. Juda;W. A. McRae
  12. Synthetic Membrane Process Georges Belfort

Acknowledgement

Grant : 중소기업육성 연구과제

Supported by : 한국전력 연구원