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The Effect of Solvent Type on the Mechanical Properties of Dibutyrylchitin (DBC) Fibres

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This paper concerns the manufacture of fibres from dibutyrylchitin (DBC) using the wet spinning method. Special attention was paid to exploring the effect of solvent type on the mechanical properties of DBC fibres. Dimethyl formamide (DMF), dimethyl sulphoxide (DMSO), n-methyl-2-pyrrolidone (MP) and ethyl alcohol (EtOH) were used for preparing the DBC spinning solutions. Additionally, more detailed investigations were carried out on the DMF spinning dope, such as the effect of polymer content in the solution, as well as that of the spinning conditions (temperature of coagulation bath, fibre take-up speed and stretching ratio) on the mechanical properties of DBC fibres. The conditions of DBC fibre spinning on a semi-technical scale were defined for the DMSO and DMF spinning dopes. DBC fibres from DMSO and DMF solutions were characterised by a tenacity of 10.5 to 14.6 cN/tex and elongation at break from 10% to 22%. Batches of DBC fibres (from DMF and DMSO solutions) were prepared for further processing into nonwovens for medical use.

Tags: dibutyrylchitin, solutions DBC, wet spinning fibres, mechanical properties of DBC fibres.

Published in issue no 3 (62) / 2007, pages 14–18.

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