CNT-UHMWPE composites

Table 5.2. Raman Shift (2691 cm 1) vs. percent tensile strain in CNT/ UHMWPE composites Ruan et al. (48)...

To elucidate the reinforcement mechanisms in the CNT/UHMWPE composite fiber, Ruan et al. carried out micro-Raman analysis to investigate the load transfer at the CNT-UHMWPE interface (Ruan et al, 2006). In addition, orientation of CNTs in the UHMWPE matrix at different draw ratios was studied by Tam et al (2010). 

The interfacial load transfer during the stress-strain deformation of the 5 wt% CNT/UHMWPE composite fiber is shown in terms of Raman shift at different deformations at a draw ratio of 30. Raman shift versus strain for the asymmetric C-C stretching band of PE (1060cm ) and the G-band (1595 cm ) of CNT inside the 5wt% MWCNT/UHMWPE composite fiber at a draw ratio of 30 are depicted in Figs 10.8(a) and 10.8(b), respectively. The Raman shift of the pure UHMWPE fiber at a draw ratio of 30 is also shown in Fig. 10.8(a) for comparison. The data are divided into three regions. In region I, the G-band shows a rapid... 

Gao J-F, Li Z-M, Peng S, Yan D-X (2009) Temperamre-resistivity behaviour of CNTs/UHMWPE composites with a two-dimensional conductive network. Polym-Plast Technol Eng 48 478... 

Raman shift versus strain for the asymmetric C-C stretching band of PE (1060cm ) (a) and the G-band (1595cm ) (b) of CNT inside the 5wt% MWCNT/UHMWPE composite fiber at draw ratio = 30. The Raman shift of the pure UHMWPE fiber at draw ratio = 30 is also shown. 

Xue et al. (16) observed that the wear rate of the UHMWPE/HDPE blend can be significantly reduced by adding CNTs, which can be correlated with an increase of the Young s modulus. The addition of 0.5 wt% CNTs to the UHMWPE/HDPE blend caused about 50% reduction of the wear rate, which is shown in Table 5.7. Besides, the composites reinforced with untreated CNTs had a better wear performance than the composites with pre-treated CNTs and the graphical... 

Regarding to mechanical properties, it was reported the fabrication of UHMWPE/CNTs composites with properties close to the commercially available fibers like Kevlar [63]. Bakshi et al. [64] used a quite different technique to prepare films of UHMWPE/CNTs. Mechanical ball-milling to mix the raw UHMWPE with CNTs, and after that the powder composite was processed by compression molding in a hot press. The results have shown a homogeneous distribution of the CNTs into the UHMWPE. Xue et al. 

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