Influence of fibre formation conditions on the properties of nanocomposite PAN fibres containing nanosilver (English)

The research involved studying the influence of coagulation bath temperature and the as spun draw ratio on the porous structure and strength properties of PAN fibres containing a silver nanoadditive. The fibres produced are characterised by a strength reaching 45 cN/tex and an increased porosity of up to 0.6 cm3/g. These properties are advantageous when such fibres are a precursor for producing carbon fibres for medical purposes. Variation in the as-spun draw ratio from positive to negative values entails a substantial increase in the tenacity of fibres (by 12.3 cN/tex), accompanied by changes in porosity. n The macroporous structure of nanocomposite fibres obtained in the range of process parameter variation applied (solidification bath temperature and the as-spun draw ratio value) is characteristic of a solidification mechanism and similar to a dripping one. n The presence of nanosilver in PAN fibre material resulted in only a minor (about 10%) decrease in tenacity properties in comparison to fibres without a nanoadditive. n The possibility of obtaining carbon fibres containing silver, implemented in the form of a nano-additive for precursor fibres, was stated. n The equal distribution of the nanoadditive in precursor fibres is reflected in its equal distribution in carbon fibres.