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The interlocked carbon nanotube (CNT) networks formed by floating catalyst chemical vapor deposition method is found to show greatly enhanced damping ratio (0.37–0.42) and much higher storage modulus (>11.0GPa) compared to most of engineering damping materials and any other kinds of CNT networks and composites ever reported. Interestingly, its damping performance is frequency-dependent with damping...
Carbon nanotubes have been dispersed in thick epoxy/plain woven glass fiber composites using a sizing agent. Electrically conductive networks that act as in situ impact damage sensors were provided by the well dispersed carbon nanotubes. Electrical resistance increases with repeated impact loading; elastic deformation and damage evolution can be identified from the resistance-change. Correlations...
The efficiency of damage sensing in fiber composites with uniformly and non-uniformly dispersed carbon nanotubes has been compared in this study. A highly uniform dispersion of carbon nanotube in fiber composites was achieved through the three-roll-mill technique while a non-uniform dispersion of carbon nanotubes was obtained using a nanotube-containing fiber sizing agent. Both techniques are effective...
This paper reports an innovative approach to enhance electrical conductivity of fiber composites based on non-conductive fiber and polymer matrix. The dispersion of carbon nanotubes (CNTs) is carried out using a fiber sizing agent which contains uniformly distributed CNTs. The infusion of the sizing agent into the fiber preform prior to resin infusion gives rise to high agglomeration of CNTs on the...
Material and structural reliability is crucial for the potential use of composite materials in a variety of structural applications. As a result, damage detection and health monitoring of fiber-reinforced composites are attracting progressively more attention in the field of materials research. In this work, small amounts of carbon nanotubes are added into traditional fiber composites to form electrically...
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