Paper Information

Journal:   AMIRKABIR JOURNAL OF CIVIL ENGINEERING (AMIRKABIR)   2017 , Volume 49 , Number 2 #G0086; Page(s) 379 To 388.
 
Paper: 

INVESTIGATION OF COAGULANT TYPE EFFECT ON WET–SPINNING PROCESS OF REGENERATED SILK FIBROIN

 
Author(s):  SIADAT S.A., MOKHTARI J.*
 
* DEPARTMENT OF TEXTILE ENGINEERING, FACULTY OF ENGINEERING, UNIVERSITY OF GUILAN, RASHT, IRAN
 
Abstract: 

Re-generated silk fibroin (RSF) with various concentrations including 8, 10, 12.5 and 13% (w/w), was dissolved in N-methyl morpholine N-oxide (NMMO) to prepare spinning solutions. The effect of several coagulants such as methanol, ethanol and 1-propanol, and temperatures of spinning including 95, 110 and 120oC, on the wet spinnability of the silk fibroin solutions were investigated. Tenacity at break of undrawn fibers, which were produced by various concentrations and coagulants, were measured. Bead free fibers with high tenacity and elongation at break (1.6 cN/dtex and 34.25% respectively) were produced at concentration of 8% (w/w), temperature of 95oC and by presenting of methanol coagulant. Also by increasing of concentrations from 8% to 10, 12.5 and 13%, the tenacity was decreased to 0.81, 0.70 and 0.20 cN/dtex, respectively. Tenacity of fibers were obtained in 1-propanol (0.6 cN/dtex) was lower than those in ethanol and methanol coagulation bath, 0.8 and 1.6 cN/dtex, respectively. These results were shown that chemical structure type of coagulant strongly influenced the wet spinnability of undrawn regenerated silk fibers.

 
Keyword(s): REGENERATED SILK FIBROIN, N - METHYL MORPHOLINE N – OXIDE, COAGULANTS, WET SPINNABILITY, TENACITY
 
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