The Effect of Multiwalled Carbon Nanotubes on the Thermal Conductivity and Cellular Size of Polyurethane Foam

Figure 5

SEM micrographs of (a) original PU foam and foam nanocomposites containing (b) 1 wt.% MWCNTs, (c) 3 wt.% MWCNTs, and (d) 3 wt.% modified MWCNTs with low magnification (30 times).

(a)

(b)

(c)

(d)