Page 67 - Polymer-based Nanocomposites for Energy and Environmental Applications

Preparation and properties of nanopolymer advanced composites: A review 45

Fig. 2.18 Plasma-modified and -sized carbon fibers and 0.5 wt% HP14T-modified matrix in
TFBT [36].

has little resin attached, which results in bad adhesion. Finally, results showed that the
considerable enhancement of the interphase and mechanical strength of the FRP have
been achieved with composites that contains suitably treated fibers.

2.4 Nanopolymer fiber reinforced sandwich
composites (NPFRSC)

Mahfuz et al. [37] have made an attempt to improve the performance of the TiO 2
nanoparticle-infused polyurethane foam with regular S-2 glass fiber preforms and
SC-15 epoxy sandwich composites by strengthening the core but partially sacrificing
the debond fracture toughness of the sandwich construction. They have found that a
significant improvement in the flexural strength and stiffness with 3% loading of TiO 2
nanoparticles. Experimental data obtained during their study are presented in
Table 2.6. Debond fracture toughness parameters (G c ) have found to be a nanoparticle
infusion that reduces the value of G c by almost a factor of three. Despite this reduction,
strength of nanophased sandwich has been increased by about 53% over the neat
system.
The dynamic properties of graphite/epoxy face sheet sandwich beams with
MWNT/polymer nanocomposites as core materials are investigated by Yeh and Hsieh
[38]. They have found that the face laminate dominates the stiffness of the sandwich