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Conducting bicomponent fibers obtained by melt spinning of PA6 and polyolefins containing high amounts of carbonaceous fillers

Martin Strååt (Institutionen för material- och tillverkningsteknik, Polymera material och kompositer) ; Mikael Rigdahl (Institutionen för material- och tillverkningsteknik, Polymera material och kompositer) ; Bengt Hagström (Institutionen för material- och tillverkningsteknik, Polymera material och kompositer)
Journal of Applied Polymer Science (0021-8995). Vol. 123 (2012), 2, p. 936-943.
[Artikel, refereegranskad vetenskaplig]

Melt spinning of conductive polymer composites (CPCs) is coupled with some difficulties such as a decrease of conductivity upon drawing and a reduced spinnability with increasing filler concentration. Applying bicomponent technology may provide the possibility to produce fibers from CPCs with a high filler concentration. A pilot-scale bicomponent melt spinning set-up was used to produce core/sheath fibers with fiber titers between 13 and 47 dtex. The sheath material was polyamide 6 (PA6) or polypropylene (PP) and the core material was a CPC. Two CPCs were used, polypropylene (PP) with carbon black (CB), denoted by PP/CB, and polyethylene (PE) with multiwalled carbon nanotubes (MWNT), denoted by PE/MWNT. The results showed that both materials could be used with a filler concentration of 10 wt % to obtain melt draw ratios up to 195. The volumetric fraction of core material in the bicomponent structure was 28%. A heat treatment of PP/CB fibers restored the conductivity to the level of the undrawn material, corresponding to an increase in conductivity by a factor 5. The same heat treatment had a positive effect on the conductivity of PE/MWNT fibers although the conductivity was not restored.

Nyckelord: carbon black, multiwalled carbon nanotubes, fibers, conductivity, percolation, melt spinning



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Denna post skapades 2011-10-10. Senast ändrad 2014-10-27.
CPL Pubid: 147036

 

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