World Academy of Science, Engineering and Technology
Published December 23, 2012 | Version 13189
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Processing, Morphological, Thermal and Absorption Behavior of PLA/Thermoplastic Starch/Montmorillonite Nanocomposites

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Thermoplastic starch, polylactic acid glycerol and maleic anhydride (MA) were compounded with natural montmorillonite (MMT) through a twin screw extruder to investigate the effects of different loading of MMT on structure, thermal and absorption behavior of the nanocomposites. X-ray diffraction analysis (XRD) showed that sample with MMT loading 4phr exhibited exfoliated structure while sample that contained MMT 8 phr exhibited intercalated structure. FESEM images showed big lump when MMT loading was at 8 phr. The thermal properties were characterized by using differential scanning calorimeter (DSC). The results showed that MMT increased melting temperature and crystallization temperature of matrix but reduction in glass transition temperature was observed Meanwhile the addition of MMT has improved the water barrier property. The nanosize MMT particle is also able to block a tortuous pathway for water to enter the starch chain, thus reducing the water uptake and improved the physical barrier of nanocomposite.

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References

  • Kolybaba M, Tabil LG, Panigrahi S, Crerar WG, Powell T, and Wang B. (2003). Biodegradable polymers: Past, Present and Future, CSAE/ASAE Annual Intersectional Meeting. Univaersity of Saskatchewan, North Dakota.
  • Wang H, Sun X, and Seib P (2002). Mechanical Properties of Poly(lactic Acid) and Wheat Starch Blends with Methylenediphenyl Diisocyanate, Journal of Applied Polymer Science, 84: 1257-1262.
  • Yew G.H , Mohd Yusof A.M , Mohd Ishak Z.A , and Ishiaku U.S. (2005). Water absorption and enzymatic degradation of poly(lactic acid)/rice starch composites, Polymer Degradation and Stability, 488- 500.
  • Vašková I, Alexy P, Bugaj P, Anna Nahálková and Feranc J. (2008). Biodegradable polymer packaging materials based on polycaprolactone, starch and polyhydroxybutyrate, Acta Chemica Slovaca, 1: 301.
  • Cai J, Liu M, Wang L, Yao K, Li Sh, and Xiong H. (2011). Isothermal crystallization kinetics of thermoplastic starch/poly(lactic acid) composites, Carbohydrate Polymers, 86: 941-947.
  • Preechawong D, Peesan M, Supaphol P, and Rujiravanit R. (2005). Preparation and characterization of starch/poly(L-lactic acid) hybrid foams, Carbohydrate Polymers, 59: 329-337.
  • Xiaogang L, Naipeng Zh, Keke Y, and Yuzhong W.(2008). Preparation of Poly (lactic acid)/Etherified, Iranian Polymer Journal, vol. 17, 2 12.
  • Lu DR, Xiao CM, and Xu SJ. (2009). Starch-based completely biodegradable polymer materials, eXPRESS Polymer Letters, 3: 366- 375.
  • Garlotta D .(2001). A Literature Review of Poly(Lactic Acid), Journal of Polymers and the Environment, 9: 63. [10] Kim SH, Chin I, Yoon J, Kim SH, and Jung J. (1998). Mechanical properties of biodegradable blends of poly(L- lactic acid) and starch, Korea Polymer Journal, 6:422-7. [11] Yeul Jang W, Young Shin B, Jin Lee T, and Narayan R. (2007). Thermal Properties and Morphology of Biodegradable PLA/Starch Compatibilized Blends, Journal of Industrial and Engineering Chemistry, 13: 457-464. [12] Aouada FA, Mattoso LHC, and Longo E. (2011). New strategies in the preparation of exfoliated thermoplastic starch-montmorillonite nanocomposites, Industrial Crops and Products, 34: 1502-1508. [13] Xiaozhi T, Alavi S, and Thomas J.H. (2008). Barrier and Mechanical Properties of Starch-Clay Nanocomposite Films, Creal Chem, 85-91. [14] Sudip R, Quek SY, Easteal A, and Dong Chen X. (2006). The Potential Use of Polymer-Clay Nanocomposites in Food Packaging, International Journal of Food Engineering, 1: 4. [15] Chow, WS and Ooi KH. (2007). Effects of Maleic Anhydride Grafted Polystyrene on the Flexural and Morphological properties of Polystyrene/Organo-Montmorillonite Nanocomposites, Malaysian Polymer Journal, 2: 1-9. [16] Majdzadeh-Ardakani K, Navarchian AH , Sadeghi F. (2010). Optimization of mechanical properties of thermoplastic starch/clay nanocomposites, Carbohydrate Polymer, 79: 574-554. [17] Rezaie and Haddadi Asl. (2010). Effect of chemical components of emulsion polymerization in aqueous media on Na-MMT nanostructure by XRD analysis, Polymer Research, 17-29. [18] Zheng H, Zhang Y , Peng Z, and Zhang Y. (2004). Influence of clay modification on the structure and mechanical properties of EPDM/montmorillonite nanocomposites, Polymer Testing, 23: 217-223. [19] Mishra DR, Nayak NC, Mohanty P and Nayak P.L. (2011). Phisicochemical properties of environmentalfriendly starch-MMT, International Journal of Plant, Animal, and Environmental Sciences, vol.1. [20] Lee, H. J., Park, T. G., Park, H. S., Lee, D. S., Lee, Y. K., Yoon, S. C. and Nam, J. (2003). Thermal and mechanical characteristics of poly (llactic acid) nanocomposite scaffold. Biomaterials. 24: 2773-2778. [21] Balakrishnan, H., Hassan, A., Uzir Wahit, M., Yussuf, A. A., and Razak, B. A. (2010). Novel thoughened polylactic acid nanocomposite: mechanical, thermal and morphological properties. Journal of material and design, 31, 3289-3298. [22] Fukushima, K., Abbate, C., Tabuani, D., Gennari, M., and Camino, G.(2009). Biodegradation of poly(lactic acid) and its nanocomposites. Polymer Degradation and Stability, 94, 1646-1655. [23] Chow, W. S., and Lok, S. K. (2008). Flexural, Morphological and Thermal Properties of Polylactic acid/Organo-Montmorillonite Nanocomposites. Polymers and Polymer Composites , 16(4), 263-270. [24] Pluta, M., Galeski, A., Alexandra, M., Paul, M. A., and Dubois, P. (2002). Polylactide/montmorillonite nanocomposites and microcomposites prepared by melt blending: Structure and some physical properties. Journal of Applied Polymer Science , 1497-1506. [25] Ray, S. S., Yamada, K., Okamotoa, M., and Ueda, K. (2003). New polylactide-layered silicate nanocomposites. 2. Concurrent improvements of material properties, biodegradability and melt rheology. Polymer , 44, 857-866. [26] Siew-Yoong, L., Chen, H., and Hanna, M. (2008). Preparation and characterization of tapioca starch-poly(lactic acid) nanocomposite foams by melt intercalation based on clay type. Biological Systems Engineering, 1-14. [27] Slavutsky, A. M., and Bertuzzi, M. A. (2012). A phenomenological and thermodynamic study of the water permeation process in corn starch/MMT films. Carbohydrate polymers. 52-5. [28] Arroyo, O. H., Huneault, M.A., Favis, B.D., and Bureau, M.N. (2010). Processing and Properties of PLA/Thermoplastic Starch/Montmorillonite Nanocomposites. Polymer composite, 31, 114- 127. [29] Cyras VP, Manfredi LB, Ton-That MT, and V├ízquez A. (2008). Physical and mechanical properties of thermoplastic starch/montmorillonite nanocomposite films, Carbohydrate Polymers, 73(1): 55-63.