Enhanced acoustic damping in flexible polyurethane foams filled with carbon nanotubes

Flexible polyurethane (PU) foams, with loading fractions of up to 0.2 wt% carbon nanotubes (CNTs), were made by free-rising foaming using water as blowing agent. Electron microscopy revealed an open cellular structure and a homogeneous dispersion of CNTs, although the incorporation of nanofiller aff...

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Published in:	Composites science and technology Vol. 69; no. 10; pp. 1564 - 1569
Main Authors:	Verdejo, R., Stämpfli, R., Alvarez-Lainez, M., Mourad, S., Rodriguez-Perez, M.A., Brühwiler, P.A., Shaffer, M.
Format:	Journal Article Conference Proceeding
Language:	English
Published:	Kidlington Elsevier Ltd 01.08.2009 Elsevier
Subjects:	A. Carbon nanotubes A. Nanocomposite A. Polymer foam Applied sciences Cellular Composites Exact sciences and technology Forms of application and semi-finished materials P. Damping properties Polymer industry, paints, wood Technology of polymers A. Nanocomposite A. Polymer foam P. Damping properties A. Carbon nanotubes Cell structure Strengthening Blowing agent Carbon nanotubes Mechanical properties Dispersion reinforced material Tensile property Compressive strength Acoustic absorption Experimental study Cellular plastic Composite material Hot pressing Foaming process Polyurethane Concentration effect Nanocomposite Plastics
ISSN:	0266-3538, 1879-1050
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Abstract	Flexible polyurethane (PU) foams, with loading fractions of up to 0.2 wt% carbon nanotubes (CNTs), were made by free-rising foaming using water as blowing agent. Electron microscopy revealed an open cellular structure and a homogeneous dispersion of CNTs, although the incorporation of nanofiller affected the foaming process and thus the final foam density and cellular structure. The compressive response of the foams did not show an unambiguous improvement with CNT content due to the variable foam structure. However, dense films generated by hot pressing the foams indicated a significant intrinsic reinforcement of the polymer, even at low loadings of CNTs. Most significantly, CNTs were found to increase the acoustic activity monotonically at concentrations up to 0.1 wt%.
AbstractList	Flexible polyurethane (PU) foams, with loading fractions of up to 0.2 wt% carbon nanotubes (CNTs), were made by free-rising foaming using water as blowing agent. Electron microscopy revealed an open cellular structure and a homogeneous dispersion of CNTs, although the incorporation of nanofiller affected the foaming process and thus the final foam density and cellular structure. The compressive response of the foams did not show an unambiguous improvement with CNT content due to the variable foam structure. However, dense films generated by hot pressing the foams indicated a significant intrinsic reinforcement of the polymer, even at low loadings of CNTs. Most significantly, CNTs were found to increase the acoustic activity monotonically at concentrations up to 0.1 wt%.
Author	Stämpfli, R. Brühwiler, P.A. Rodriguez-Perez, M.A. Verdejo, R. Alvarez-Lainez, M. Mourad, S. Shaffer, M.
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Keywords	A. Nanocomposite A. Polymer foam P. Damping properties A. Carbon nanotubes Cell structure Strengthening Blowing agent Carbon nanotubes Mechanical properties Dispersion reinforced material Tensile property Compressive strength Acoustic absorption Experimental study Cellular plastic Composite material Hot pressing Foaming process Polyurethane Concentration effect Nanocomposite Plastics
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Snippet	Flexible polyurethane (PU) foams, with loading fractions of up to 0.2 wt% carbon nanotubes (CNTs), were made by free-rising foaming using water as blowing...
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SubjectTerms	A. Carbon nanotubes A. Nanocomposite A. Polymer foam Applied sciences Cellular Composites Exact sciences and technology Forms of application and semi-finished materials P. Damping properties Polymer industry, paints, wood Technology of polymers
Title	Enhanced acoustic damping in flexible polyurethane foams filled with carbon nanotubes
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