Current Trends in Nanocomposite Foams

Abstract

This article presents a brief but concise review of the current research efforts on polymeric nanocomposite foams production, characterization, and applications. Survey indicates that the emergence of nanocomposites has resulted in the development of a new group of materials regarded as nanocomposite foams. Nanocomposites result from the use of nano-sized (10^-09 m) particles as fillers to modify and enhance the properties of polymers and other matrices. The combination of functional nanoparticles and foaming technologies such as supercritical fluid foaming, chemical foaming, syntactic foaming, aerogel foaming, phase inversion foaming etc. generate these new materials regarded as nanocomposite foams that have light weight, high specific strength, and multifunctional attributes. Enhanced thermo-mechanical properties of nanocomposite foams result from improved cell morphology that is mainly attributable to the role of nanoparticles as nucleation agents for bubble generation. High-specific mechanical properties and multifunctional characteristics of nanocomposite foams make them cost-effective and desirable in a multitude of application areas including structural, energy-dissipating/absorbing, acoustical insulation, flammability resistance, and others. Of particular importance in this study of nanocomposite foams is the flammability resistance effect of nanoparticles. The intumescent model (NIST, NMAB, and others) indicates that the flame barrier mechanism involves a high-performance carbonaceous-silicate char; this char build-up insulates the underlying material. Understanding this char build-up mechanism presents a challenge and area of research interest in the effort to develop new generation foams that are suitable in energy absorbing materials and structures.

Keywords

Nanoparticles Nanocomposites Microspheres Syntactic Nanocomposite Foams Nanocomposite-Syntactic Foams Nanotubes Nanofibers Nanoclays Nanoplatelets Nucleation Agents Morphology Free Energy Cone Calorimetry Peak Heat Release Rate (PHRR)Smoke Density.

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References

Lee, L.J. , Zeng, C.H. , Cao, X. , Han, X. , Shen, J. and Xu, G. (2005). Polymer Nanocomposite Foams, Composites Science and Technology, 65: 2344-2363.

Shen, J. , Zeng, C.H. and Lee, L.J. (2005). Synthesis of Polystyrene-Carbon Nanofiber Microcellular Foams, Polymer, 46: 5218-5224.

Shen, J. , Cao, X. and Lee, L.J. (2006). Synthesis and Foaming of Water Expandable Polystyrene-Clay Nanocomposites, Polymer, 47: 6303-6310.

Mahfuz, H. , Rangari, V.K. , Islam, M.S. and Jeelani, S.H. (2004). Fabrication of Nanoparticles Infused Polyurethane Foams, Composites: Part A, 35: 453-460.

Han, X. , Shen, J. and Yang, Y. Thermoplastic Nanocomposite Foams, http://www.che.eng.ohio-state.edu/facultypages/leeresearch/2ThermoplasticNano.htm

Throne, J.L. (1996). Newer Foaming Technologies, Thermoplastic Foams, Ch. 11, Hinckley, OH, Sherwood Publishers .

Velasco, J.I. , Antunes, M. , Ayyad, O. , Lopez-Cuesta, J.M. , Gaudon, P. , Saiz-Arroyo, C. , Rodrıguez-Perez , M.A. and de Saja, J.A. (2007). Foaming Behaviour and Cellular Structure of LDPE/hectorite, Polymer, 48: 1-11.

Chen, L. , Straff, R. and Wang, X. (2001). Effect of Filler Size on Cell Nucleation During Foaming Process, SPE-ANTEC, 59: 1752.

Klempner, D. and Frisch, K.C. (eds), (1991). Handbook of Polymeric Foams and Foam Technology, New York, Oxford University Press.

10.

Park, C.B. , Behravesh, A.H. and Venter, R.D. (1997). A Strategy for the Suppression of Cell Coalescence in the Extrusion of Microcellular High-Impact Polystyrene Foams, ACS Symp. Ser., 669: 115.

11.

Zeng, C. (2004). Synthesis, Structure and Properties of Polymeric Nanocomposites, Ph.D. Thesis, The Ohio University.

12.

Panayotov, D.A. , Paul, D.K. and Yates, J.T. (2003). Photocatalytic Oxidation of 2-Chloroethyl Sulfide on TiO2-SiO2 Powders, J. Phys. Chem. B, 107: 10571-10575.

13.

Gao, X. and Wachs, I.E. (1999). Titania-silica as Catalysts: Molecular Structural Characteristics and Physico-chemical Properties, Catal. Today , 51: 233-254.

14.

Anderson, C. and Bard, A.J. (1997). Improved Photocatalytic Activity and Characterization of Mixed TiO2/SiO2 and TiO2/Al2O3 Materials , J. Phys. Chem. B, 101: 2611-2616.

15.

Ibeh, C.C. , Bubacz, M. and Bietto, S. (2006). Flammability Resistance Properties of Epoxy Nanocomposites, Flammability Resistance Properties of Epoxy Nanocomposites, Chicago, IL, ASME-IMECE.

16.

Ibeh, C.C. , Bubacz, M. and Bietto, S. (2007). Flammability Resistance of Nanocomposite Foams , ASME-IMECE-43545.

17.

Turng, L. and Kramschuster, A.J. (2007). Toward Mass Production of Highly Porous Biodegradable Polymer Foams for Tissue Engineering Scaffolds , Newark, NJ, PolymerFoams.

18.

Horsch, S. , Serhatkulu, G. , Gulari, E. and Kannan, R.M. (2006). Supercritical CO2 Dispersion of Nano-clays and Clay/polymer Nanocomposites, Polymer, 47: 7485-7496.

19.

Cao, X. , Lee, L.J. , Widya, T. and Macosko, C.H. (2005). Polyurethane/clay Nanocomposites Foams: Processing, Structure and Properties, Polymer, 46: 775-783.

20.

Kabir, M. d.E., Saha, M.C. and Jeelani, S. (2007). Effect of Ultrasound Sonication in Carbon Nanofibers/polyurethane Foam Composite, Materials Science and Engineering A, 459: 111-116

21.

Zhai, W. , Yu, J. , Wu, L. , Ma, W. and He, J. (2006). Heterogeneous Nucleation Uniformizing Cell Size Distribution in Microcellular Nanocomposites Foams, Polymer , 47: 7580-7589.

22.

Ema, Y. , Ikeya, M. and Okamoto, M. (2006). Foam Processing and Cellular Structure of Polylactide-based Nanocomposites, Polymer, 47: 5350-5359.

23.

Shafi, M.A. , Joshi, K. and Flumerfelt, R.W. (1997). Bubble Size Distributions in Freely Expanded Polymer Foams, Chemical Engineering Science , 52(4): 635-644.

24.

Joshi, K. , Lee, J.G. , Shafi, M.A. and Flumerfelt, R.W. (1998). Prediction of Cellular Structure in Free Expansion of Viscoelastic Media, Journal of Applied Polymer Science, 67: 1353-1368.

25.

Gibbs, W.J. The Scientific Papers of J. Willard Gibbs, Thermodynamics, Vol. I., Dover Publications, Inc., New York, NY.

26.

Kim, J. , Lee, J. and Hyeon, T. (2004). Direct Synthesis of Uniform Mesoporous Carbons from the Carbonization of As-synthesized Silica/ triblock Copolymer Nanocomposites , Carbon, 42: 2711-2719.

27.

Chen, V.J. and Ma, P.X. (2006). The Effect of Surface Area on the Degradation Rate of Nano-fibrous Poly(l-lactic acid) Foams, Biomaterials , 27: 3708-3715.

28.

Torres, F.G. , Nazhat, S.N. , Sheikh, M.D. , Fadzullah, S.H. , Maquet, V. and Boccaccini, A.R. (2007). Mechanical Properties and Bioactivity of Porous PLGA/TiO2 Nanoparticle-filled Composites for Tissue Engineering Scaffolds, Composites Science and Technology, 67: 1139-1147.

29.

Wei, J. , Li, Y. and Lau, K.T. (2007). Preparation and Characterization of Nano Apatite/polyamide6 , Composites: Part B, 38: 301-305.

30.

Munoz, E. , de Val, M. , Ruiz-Gonzalez, M.L. , Lopez-Gascon, C. , Sanjuan, M.L. , Martinez, M.T. , Gonzalez-Calbet, J.M. , de la Fuente, G.F. and Laguna, M. (2006). Gold/carbon Nanocomposite Foam, Chemical Physics Letters, 420: 86-89.

31.

Kim, J. , Lee, J. and Hyeon, T. (2004). Direct Synthesis of Uniform Mesoporous Carbons from the Carbonization of As-synthesized Silica/ triblock Copolymer Nanocomposites, Carbon, 42: 2711-2719.

32.

Yang, W. , Yang, S.H. , Sun, W. , Sun, G. and Xin, Q. (2006). Nanostructured Silver Catalyzed Nickel Foam Cathode for an Aluminum-hydrogen Peroxide Fuel Cell, Journal of Power Sources, 160: 1420-1424.

33.

Tomasko, D.L. , Han, X. , Liu, D. and Gao, W. (2003). Supercritical Fluid Applications in Polymer Nanocomposites, Current Opinion in Solid State and Materials Science, 7: 407-412.

34.

Maharsia, R.R. and Jerro, H.D. (2006). Low Velocity Impact Properties of Nanoparticulate Syntactic Foams, Materials Science and Engineering A, 496: 217-222.