Preparation of para-aramid/carbon black composite fibers by dry-jet wet spinning and properties
The traditional para-aramid fiber structure is regular,making surface modification challenging and its functions relatively simple.To address this issue,para-aramid/carbon black composite fibers were prepared by introducing carbon black into the para-aramid precursor,followed by functionalization modifica-tion through a dry-jet wet spinning process.Scanning electron microscopy,X-ray diffraction analysis,and Fourier transform infrared spectroscopy were used to characterize their morphology and structure.Additionally,thermogravi-metric analysis,electronic single fiber strength testing,and thermal infrared imaging were employed to investigate the properties of the para-aramid/carbon black composite fibers.The results show that compared to para-aramid fi-bers without carbon black,the composite fibers with a para-aramid/carbon black feeding ratio of 95∶5 exhibited a 97.13％increase in elongation at break while retaining 73.82％of the original breaking strength.They also demon-strated good thermal stability,with a temperature change of up to 34 ℃ after 7 minutes of infrared lamp irradiation,indicating excellent photothermal conversion performance.
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