Abstract
In order to solve the problems of dyeing difficulty and serious pollution of traditional water-based dyeing of para-aramid, supercritical CO2 fluid was employed as a dyeing solvent to dye para-aramid yarn (temperatures 80–120 °C, pressures 16–24 MPa, dyeing time 15–90 min, and dye concentration 1 %–7 % o.m.f.). The K/S values reached 2.07 and 1.91 at 120 °C, 24 MPa, 60 min, 5 % o.m.f., and a CO2 flow of 20 g/min with C. I. Disperse Red 54 and C. I. Disperse Blue 79, respectively. The results proved that para-aramid yarn could be dyed in supercritical CO2 fluid. Moreover, the thermal and mechanical properties of dyed para-aramid yarns in supercritical CO2 showed a slightly increasing trend. The washing, rubbing, and the light color fastness of the dyed samples were rated above 4–5, and the color fastness durability of the dyed para-aramid was also presented good.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (21908015), Basic Scientific Research Project of Higher Education Department of Liaoning Province (J202152), Dalian Youth Science and Technology Star Fund (2020RQ019), Guidance Program of Liaoning Natural Science Foundation (2019-ZD-0285), and the Seventh Batch “Hundred People Plan” of Talent Introduction in Fujian Province.
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Zhang, Y., Zheng, H., Zheng, L. et al. Investigation of Eco-friendly Dyeing of Para-aramid Using Supercritical CO2. Fibers Polym 23, 2196–2205 (2022). https://doi.org/10.1007/s12221-022-4716-9
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DOI: https://doi.org/10.1007/s12221-022-4716-9