Membrane Journal (멤브레인)

The Membrane Society of Korea (한국막학회)
권호 표지

Mechanical and Oxygen Permeation Properties of Layered Double Hydroxide/Ethylene Vinyl Acetate Nanocomposite Membranes

Mg-Al Layered Double Hydroxide/Ethylene Vinyl Acetate 나노복합막의 기계적 특성과 기체투과 특성에 관한 연구

  • Hwang, Ji-Young (Department of Industrial Chemistry, Sangmyung University) ;
  • Lee, Sang-Hyup (Water Environment Center, Korea Institute of Science and Technology) ;
  • Lee, Jong-Suk (Water Environment Center, Korea Institute of Science and Technology) ;
  • Hong, Se-Ryung (College of general studies, Sangmyung University) ;
  • Lee, Hyun-Kyung (Department of Industrial Chemistry, Sangmyung University)
  • 황지영 (상명대학교 공업화학과) ;
  • 이상협 (한국과학기술원 물환경센터) ;
  • 이종석 (한국과학기술원 물환경센터) ;
  • 홍세령 (상명대학교 교양대학) ;
  • 이현경 (상명대학교 공업화학과)
  • Received : 2013.04.02
  • Accepted : 2013.04.23
  • Published : 2013.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

The effect of layered double hydroxides (LDH) on the gas separation properties of ethylene vinyl acetate copolymer was investigated. Mg-Al LDH/EVA nanocomposite membranes were prepared from solution intercalation using organically modified LDH (DS-LDH). Dodecyl sulfate (DS)-LDH was obtained by the intercalation of DS anion in the interlayer. The nanocomposite structure has been elucidated by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). XRD pattern clearly shows that the DS-LDH layers are disorderly well dispersed in the EVA matrix. The maximum tensile strength and elongation of the LDH/EVA nanocomposite membrane were found with the LDH content 3 wt%. The thermal properties of nanocompostie membrane were enhanced by the incorporation of LDH in EVA matrix. Gas permeation of LDH/EVA nanocomposite membranes with LDH contents of 1, 3, 5 wt% was studied for $O_2$ and $CO_2$ single gases. The presence of 3 wt% LDH decreased $O_2$ permeability by up to 53% compared to the EVA membrane. In spite of barrier property of nanocomposite membrane, however, the gas permeability for $CO_2$ was increased due to its strong affinity with the residual OH groups on the LDH.

EVA의 기체 분리 성질에 미치는 LDH의 영향을 알아보았다. Mg-Al LDH/EVA 나노복합막은 유기적으로 수정된 DS-LDH를 이용하여 용액 삽입법으로 제조되었다. DS-LDH는 LDH 층간에 DS 음이온을 삽입하여 제조하였다. 나노복합막의 구조는 XRD, FT-IR, SEM으로 알아보았다. DS-LDH가 EVA 내에 무질서하게 분산되었음을 XRD로부터 확인하였다. LDH가 3 wt% 첨가된 나노복합막에서 인장강도와 파단신율 모두 최댓값을 나타내었다. 열적 안정도 역시 EVA에 LDH가 첨가되면서 향상되었다. 1, 3, 5 wt%의 LDH를 함유한 LDH/EVA 나노복합막의 기체투과도는 $O_2$와 $CO_2$에 대하여 측정하였다. 3 wt% LDH를 함유한 경우 나노복합막의 $O_2$에 대한 투과도가 EVA막에서보다 53% 감소하였다. 하지만 $CO_2$ 투과도는 나노복합막의 기체 차단 특성에도 불구하고 LDH 내의 OH기와 $CO_2$ 간의 높은 친화력으로 인하여 기체투과도는 증가하였다.

Keywords

References

  1. T. H. Kim, J. C. Jeong, J. M. Park, and C. H. Woo, "Recent development trends of polymer membranes for gas separation", Membrane Journal, 20, 267 (2010).
  2. W. J. Koros, "Gas separation membranes: needs for combined materials science and processing approaches", Macromol. Symp., 188, 13 (2002). https://doi.org/10.1002/1521-3900(200211)188:1<13::AID-MASY13>3.0.CO;2-W
  3. G. Maier, "Gas separation with polymer membrane", Angew. Chem. Int. ED., 37, 2960 (1998). https://doi.org/10.1002/(SICI)1521-3773(19981116)37:21<2960::AID-ANIE2960>3.0.CO;2-5
  4. L. M. Robeson, "The upper bound revisited", J. Membr. Sci., 320, 390 (2008). https://doi.org/10.1016/j.memsci.2008.04.030
  5. X. Liu, Y. Peng, and J. Shulan, "A new method to prepare organic-inorganic hybrid membranes", Desalination, 221, 376 (2008). https://doi.org/10.1016/j.desal.2007.02.056
  6. F. Masoud and D. Susan, "Gas barrier properties of PP/EPDM blend nanocomposties", J. Membr. Sci., 282, 142 (2006). https://doi.org/10.1016/j.memsci.2006.05.016
  7. H. S. Goo, I. H. Kim, Y. J. Kim, D. S. Joo, J. S. Park, J. K. Kim, and S.Y. Nam, "Preparation and properties of ionomer-clay hybrid gas barrier membrane", Membrane Journal, 14, 320 (2004).
  8. J. S. Park, J. W. Rhim, H. S. Goo, I. H. Kim, and S.Y. Nam, "Membrane application of polymer/layered silicate nanocomposite", Membrane Journal, 15, 255 (2005).
  9. Y. Zhong, D. Janes, and Y. Zheng, "Mechanical and Oxygen barrier properties of organoclay-polyethylene nanocomposite films", Polym. Eng. Sci., DOI 10. 1002, 1101 (2007).
  10. S. Marais and J. M. Saiter, C. Devallencourt, Q. T. Nguyen, and M. Metayer, "Study of transport of small molecules through ethylene-co-vinyl acetate copolymers films. Part B. $CO_{2}$ abd $O_{2}$ gases", Polym. Test., 21, 425 (2002). https://doi.org/10.1016/S0142-9418(01)00106-4
  11. S. Miyata, "Anion exchange properties of hydrotalcite- like compounds", Clay. Clay. Min., 31(4), 305 (1983). https://doi.org/10.1346/CCMN.1983.0310409
  12. F. Cavani and A. Vaccari, "Hydrotalcite-type anionic clays: Preparation, properties and applications", Catal. Today, 11, 173 (1991). https://doi.org/10.1016/0920-5861(91)80068-K
  13. J. H. Choy and S. Y. Kwak, "Intercalative nanohybrids of nucleoside monophosphates and DNA in layered metal hydroxide", J. Am. Chem. Soc., 121, 1399 (1999). https://doi.org/10.1021/ja981823f
  14. F. R. Costa and A. Leuteritz, "Intercalation of Mg-Al layered double hydroxides by anionic surfactants: Preparation and characterization", Appl. Clay. Sci., 38(3-4), 153 (2008). https://doi.org/10.1016/j.clay.2007.03.006
  15. B. Wang, H. Zhang, and D. G. Evans, "Surface modification of layered double hydroxodes and incorparation of hydrophobic organic compounds", J. Mater. Chem. Physics, 92, 190 (2005). https://doi.org/10.1016/j.matchemphys.2005.01.013
  16. H. B. H and C. Y. C, "Preparation and properties of LDHs/Polyimide nanocomposites", Polym., 44, 1151 (2003). https://doi.org/10.1016/S0032-3861(02)00887-X
  17. J. P. Ramirez, G. Mul, F. Kaptejin, and J. A. Moulijn, "A spectroscopic study of the effect of the trivalent cation on the thermal decomposition behaviour of Co-based hydrotalcites", J. Mater. Chem., 11, 2529 (2001). https://doi.org/10.1039/b104989p
  18. T. Kuila, S. K. Srivastava, and A. K. Bhowmick, "Synthesis and characterization of ethylene vinyl acetate/Mg-Al layered double hydroxide nanocomposites", J. App. Poly. Sci., DOI 10.1002/app 25840.
  19. T. Kuila and S. K. Srivastava, "Thermoplastic polyolefin based polymer-blend-layered double hydroxide nanocomposites", Com. Sci. Tech., 68, 3234 (2009).
  20. G. Choudalakis and A. D. Gotsis, "Permeability of polymer/clay nanocomposites : A review", European. Polym. J., 45, 967 (2009). https://doi.org/10.1016/j.eurpolymj.2009.01.027
  21. C. Halin and R. Maciej, "Polymer-inorganic nanocomposite membranes for gas separation", Sep. Purif. Tech., 55, 281 (2007). https://doi.org/10.1016/j.seppur.2006.12.017