بررسی تاثیر نوع انعقادگر در فرآیند ترریسی فیبروئین ابریشم بازیافتی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشکده فنی، دانشگاه گیلان، رشت، ایران

چکیده

فیبروئین ابریشم بازیافتی با غلظت های مختلف 8، 10، 5/12 و (w/w) 13% در حلال N - متیل مورفولین N - اکساید حل شد و محلول های ریسندگی با غلظت های مختلف حاصل گردید. تاثیر انواع انعقادگرها شامل: متانول، اتانول و 1- پروپانول و همچنین دماهای ریسندگی 95، 110 و °C 120 در فرآیند ترریسی محلول فیبروئین ابریشم مورد بررسی قرار گرفت. استحکام در پارگی الیاف بدست آمده در غلظت ها و حمام های انعقاد مختلف (بدون اعمال هیچ گونه فرآیند کشش) اندازه گیری و محاسبه شد. الیاف ممتد بدون ریز دانه در طول آن همراه با استحکام و ازدیاد طول نسبی تا حد پارگی بالا (به ترتیب cN/dtex 6/1 و 25/34%) در غلظت (w/w) 8% و دمای ریسندگی °C 95 و با استفاده از حمام انعقاد متانول بدست آمد و همچنین مشاهده شد که با افزایش غلظت از 8 به 10، 5/12 و (w/w) 13%، استحکام کاهش یافته و به ترتیب برابر با 81/0، 70/0 و cN/dtex 20/0 گردیده است. استحکام الیاف بدست آمده از حمام انعقاد 1- پروپانول نیز برابر با cN/dtex 6/0 بوده که کمتر از حمام های انعقاد اتانول (cN/dtex 8/0) و متانول ( cN/dtex6/1) می باشد و این نتایج حاکی از آن است که نوع ساختار شیمیائی انعقادگر بر توانایی ترریسی الیاف ابریشم بازیافتی کشیده نشده تاثیرگذار می باشد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation of Coagulant Type Effect on Wet–Spinning Process of Regenerated Silk Fibroin

نویسندگان [English]

  • S. A. Siadat
  • J. Mokhtari
Department of Textile Engineering, Faculty of Engineering, University of Guilan, Rasht, Iran
چکیده [English]

Regenerated silk fibroin (RSF) with various concentrations, 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, 95, 110 and 120 °C, on the wet spinnability of the silk fibroin solutions were investigated by means of observation of wet spun fibers in various concentrations and coagulant baths (without any post drawing performance) and by measuring their tenacities at break. Undrawn good continuous and bead free fibers with high tenacity and elongation behavior, 1.6 cN/dtex and 34.25% respectively, were obtained at the concentration of 8% (w/w) and temperature of 95 °C and with presenting of methanol coagulant. The results showed that by increasing concentrations in 10, 12.5 and 13%, the tenacity decreases, 0.81, 0.70 and 0.20 cN/dtex, respectively. Tenacity of the fibers obtained in 1-propanol, 0.6 cN/dtex, was lower than those in ethanol, 0.8 cN/dtex, and methanol, 1.6 cN/dtex, coagulation bath. Therefore these results showed that the coagulant chemical type strongly influences the wet spinnability of undrawn regenerated silk fibers.

کلیدواژه‌ها [English]

  • Regenerated Silk Fibroin N
  • Methyl Morpholine N
  • Oxide Coagulants Wet Spinnability Tenacity
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