Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Water Sorption Behaviors of Poly(Propylene Carbonate)/Exfoliated Graphite Nanocomposite Films

폴리프로필렌 카보네이트/박리흑연 나노복합필름의 수분흡수 거동

  • Kim, Dowan (Department of Packaging, Yonsei University) ;
  • Kim, Insoo (Department of Packaging, Yonsei University) ;
  • Seo, Jongchul (Department of Packaging, Yonsei University) ;
  • Han, Haksoo (Department of Chemical and Biomolecular Engineering, Yonsei University)
  • 김도완 (연세대학교 과학기술대학 패키징학과) ;
  • 김인수 (연세대학교 과학기술대학 패키징학과) ;
  • 서종철 (연세대학교 과학기술대학 패키징학과) ;
  • 한학수 (연세대학교 공과대학 화공생명공학과)
  • Received : 2013.07.15
  • Accepted : 2013.08.14
  • Published : 2013.12.10
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Abstract

In order to apply eco-friendly poly(propylene carbonate) (PPC) into barrier packaging materials, six different PPC/exfoliated graphite (EFG) nanocomposite films with different EFG were successfully prepared by a solution blending method. Their water sorption behavior was gravimetrically investigated as a function of the EFG content and interpreted with respect to their chemical structure and morphology. The water sorption isotherms were reasonably well fitted by Fickian diffusion model, regardless of morphological heterogeneities. With increasing the EFG content, the diffusion coefficient and water uptake decreased from $12.5{\times}10^{-10}cm^2sec^{-1}$ to $7.2{\times}10^{-10}cm^2sec^{-1}$ and from 8.9 wt% to 4.2 wt%, respectively, which indicates that the moisture resistance capacity of PPC was greatly enhanced by incorporating EFG into PPC. The enhanced water barrier property of the PPC/EFG nanocomposite films with the high aspect ratio EFG makes them potential candidates for versatile packaging applications. However, to maximize the performance of the nanocomposite films, further researches are required to increase the compatibility of EFG in the PPC matrix.

친환경 소재인 폴리프로필렌카보네이트(PPC)를 포장소재로서 응용하기 위하여 가로세로비가 큰 박리흑연 EFG(exfoliated graphite)를 이용하여 함량을 달리한 6종류의 PPC/EFG 나노복합필름을 제조하였다. 제조한 나노복합필름의 수분흡수 거동을 gravimetric method를 이용하여 측정하였으며, 나노복합필름의 수분에 대한 화학적 친화성(chemical affinity)과 모폴로지(morphology) 변화를 이용하여 해석하였다. 필름 내로의 수분확산 거동은 박막의 불균일성에도 불구하고 Fickian diffusion model에 잘 부합하였으며, EFG의 함량이 증가할수록 수분 확산계수와 수분 흡수량은 $12.5{\times}10^{-10}cm^2sec^{-1}$에서 $7.2{\times}10^{-10}cm^2sec^{-1}$, 8.9 wt%에서 4.2 wt%로 각각 감소하였다. 이는 수분에 대한 PPC의 차단특성이 EFG의 도입에 따라 향상되는 것을 의미한다. 높은 가로세로비를 가진 EFG를 PPC에 도입함으로써 PPC/EFG 나노복합필름의 수분에 대한 우수한 차단성 특성 발현은 패키징분야를 포함한 차단성이 요구되는 분야로의 친환경 PPC 응용성이 클 것으로 기대된다. 한편, EFG의 도입효과를 극대화하기 위한 추가적인 EFG의 분산성 향상연구가 필요하다.

Keywords

References

  1. Y. Qin, X. Wang, and F. Wang, Recent advances in carbon dioxide based copolymer, Prog. Chem., 23, 613-622 (2011).
  2. Y. Qin and X. Wang, Carbon dioxide-based copolymers: Environmental benefits of PPC, an industrially viable catalyst, J. Biotech., 5, 1164-1180 (2010). https://doi.org/10.1002/biot.201000134
  3. R. Eberhardt, M. Allmendinger, and B. Rieger, DMAP/Cr(III) catalyst ratio: The decisive factor for poly(propylene carbonate) formation in the coupling of $CO_{2}$ and propylene oxide, Macromol. Rapid Comm., 24, 194-196 (2003). https://doi.org/10.1002/marc.200390022
  4. S. Inoue and T. Tsuruta, Synthesis and thermal degradation of carbon dioxide-epoxidecopolymer, Appl. Polym. Symp., 26, 257-267 (1975).
  5. B. Ochiaiand and T. Endo, Carbon dioxide and carbon disulfide as resources for functional polymers, Prog. Polym. Sci., 30, 183-215 (2005). https://doi.org/10.1016/j.progpolymsci.2005.01.005
  6. G. A. Auinsra, Poly(Propylene Carbonate), old copolymersof propyleneoxide and carbon dioxidewith new Interests: Catalysis and materialproperties, Polym. Rev., 48, 192-219 (2008). https://doi.org/10.1080/15583720701834240
  7. S. Sujith, J. K. Min, J. E. Seong, S. J. Na, and B. Y. Lee, A Highly active and recyclable catalytic system for $CO_{2}$/propyleneoxide copolymerization, Angew. Chem. Int. Ed., 47, 7306-7309 (2008). https://doi.org/10.1002/anie.200801852
  8. X. Shi and Z. Gan, Preparation and characterization of poly(propylene carbonate)/montmorillonite nanocomposites by solution intercalation, Europ. Polym. J., 43, 4852-4858 (2007). https://doi.org/10.1016/j.eurpolymj.2007.09.024
  9. Y. Lee, D. Kim, J. Seo, H. Han, and S. B. Khan, Preparation and characterization of poly(propylene carbonate)/exfoliated graphite nanocomposite films with improved thermal stability, mechanical properties and barrier properties, Polym. Int., 62, 1386-1394 (2013). https://doi.org/10.1002/pi.4434
  10. G. A. Luinstra and E. Borchardt, Material properties of poly(propylenecarbonates), Adv. Polym. Sci., 245, 29-48 (2012).
  11. J. Yu, J. Yang, B. Liu, and X. Ma, Preparation and characterization of glycerol plasticized-pea starch/ZnO-carboxymethylcellulosesodium nanocomposites, Bioresour. Technol., 100, 2832-2841 (2009). https://doi.org/10.1016/j.biortech.2008.12.045
  12. S. K. Bajpai and C. N. Chaurasia, Investigation of water vapor permeability and antimicrobial property of zinc oxide nanoparticles- loaded chitosan-based edible film, J. Appl. Polym. Sci., 115, 674-683 (2010). https://doi.org/10.1002/app.30550
  13. S. M. E. Selke, J. D. Sem, J. D. Culter, and R. Z. Hernandez, Plastic Packaging; Properties, Processing, Applications, and Regulations. 78-350, Hanser Gardner Publication, Munich, Germany (2004).
  14. M. Xiao, L. Sun, J. J. Liu, Y. Li, and K. Gong, Synthesis and properties of polystyrene/graphite nanocomposites, Polymer, 43, 2245-2248 (2002). https://doi.org/10.1016/S0032-3861(02)00022-8
  15. H. Kwon, D. Kim, J. Seo, and H. Han, Enhanced moisture barrier films based on EVOH/exfoliated graphite (EGn) nanocomposite films by solution blending, Macromol. Res., 21, 987-994 (2013). https://doi.org/10.1007/s13233-013-1124-4
  16. I. M. Afanasov, V. Morozov, A. Kepman, S. Ionov, and A. Seleznev, Preparation, electrical and thermal properties of new exfoliated graphite-based composites, Carbon, 47, 263-270 (2009). https://doi.org/10.1016/j.carbon.2008.10.004
  17. A. Nigrawal and N. Chand, Electrical and thermal investigations on exfoliated graphite filled epoxygradient composites, Malaysian Polym. J., 5, 130-139 (2010).
  18. K. Wakabayashi, P. J. Brunner, J. Masuda, S. A. Hewlett, and J. M. Torkelson, Polypropylene-graphite nanocomposites made by solid-state shear pulverization: Effects of significantly exfoliated, unmodified graphite content on physical, mechanical and electrical properties, Polymer, 51, 5525-5531 (2010). https://doi.org/10.1016/j.polymer.2010.09.007
  19. E. J. Lee, J. S. Yoon, and E. S. Park, Morphology, resistivity, and thermal behavior of EVOH/carbon black and EVOH/graphite composites prepared by simple saponification method, Polym. Compos., 32, 714-726 (2011). https://doi.org/10.1002/pc.21090
  20. J. M. Lagaron and E. Nunez, Nanocomposites of moisture-sensitive polymers and biopolymers with enhanced performance for flexible packaging applications, J. Plast. Film Sheet., 28, 79-89 (2012). https://doi.org/10.1177/8756087911427756
  21. T. V. Ducan, Applications of nanotechnology in food packaging and food safety: barrier materials, antimicrobials and sensors, J. Coll. Interf. Sci., 363, 1-24 (2011). https://doi.org/10.1016/j.jcis.2011.07.017
  22. W. Gu, W. Zhang, X. Li, H. Zhu, J. Wei, Z. Li, Q. Shu, C. Wang, K. Wang, W. Shen, F. Kang, and D. Wu, Graphene sheets from worm-like exfoliated graphite, J. Mater. Chem., 19, 3367-3369 (2009). https://doi.org/10.1039/b904093p
  23. K. S. Kim, Y. Zhao, H. Jang, S. Y. Lee, J. M. Kim, K. S. Kim, J.-H. Ahn, P. Kim, J. Y. Choi, and B. H. Hong, Large-scale pattern growth of graphene films for stretchable transparent electrodes, Nature, 457, 706-710 (2009). https://doi.org/10.1038/nature07719
  24. H. Kim, A. A. Abdala, and C. W. Macosko, Graphene/polymer nanocomposites, Macromolecules, 43, 6515-6530 (2010). https://doi.org/10.1021/ma100572e
  25. J. Wang, X. Wang, C. Xu, M. Zhang, and X. Shang, Preparation of graphene/poly(vinyl alcohol) nanocomposites with enhanced mechanical properties and water resistance, Polym. Int., 60, 816-822 (2010).
  26. J. R. Potts, D. R. Dreyer, C. W. Bielawski, and R. S. Ruoff, Graphene-based polymer nanocomposites, Polymer, 52, 5-25 (2011). https://doi.org/10.1016/j.polymer.2010.11.042
  27. J. Crank, The Mathematics of Diffusion, Clarendon Press, Oxford, UK (1976).
  28. J. Crank and G. S. Park, Diffusion in Polymers, Academic Press, London, UK (1968).
  29. D. W. van Krevelen, Properties of Polymers 3rd Ed. Elseviers Science Publishing Com., Amsterdam, Nederland (1990).
  30. J. Seo, C. Han, and H. Han, Water-sorption behaviors of poly(3,4'- oxydiphenylene pyromellitimide) films depending on the thickness variation, J. Polym. Sci. Polym. Phys., 39, 669-676 (2001). https://doi.org/10.1002/1099-0488(20010315)39:6<669::AID-POLB1041>3.0.CO;2-#

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