Hollow glass beads loaded carbon nanotubes (HGB-CNT), prepared via an amidation reaction, were used for fabricating epoxy-matrix composites. The morphology of the as-prepared beads, and the tensile properties, electrical conductivity, and thermal behaviors of as-fabricated composites were evaluated. Field emission scanning electron microscopy and differential scanning calorimetry results showed that the dispersion of CNT in the matrix was improved as compared to control epoxy/HGB/CNT samples prepared using a conventional melt mixing method. Moreover, the tensile strength and elongation at break results illustrated that when CNT loading was 1.14 wt%, those of the epoxy/HGB-CNT composites were each ca. 25% more than the control samples. In addition, electrical conductivity results showed that when CNT loading was 1.59 wt%, the electrical conductivity of the epoxy/HGB-CNT composites increased by six orders as compared to that of the pristine epoxy and by four orders compared to that of the control samples.
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Wu et al. (2012) studied this question.
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