SERICIN REMOVAL FROM SILK FIBERS WITH ECO-FRIENDLY ALTERNATIVE METHODS

Year 2016, Volume: 26 Issue: 4, 368 - 374, 30.12.2016

Pervin Aniş , Gökşen Çapar Tuba Toprak Eyüphan Yener

Abstract

Silk fibers, composed of sericin and fibroin, are spun by the silkworm bombyx mori. Fibroin and sericin account for about 75 wt% and 25 wt% of the raw silk, respectively. Sericin is the natural cement to hold the fibroin fibers together during cocoon production. The conventional method of sericin removal is degumming with Marseille soap at alkaline pH, which leads to generation of high strength wastewaters. In this study, extraction of sericin from silk fibers was performed with alternative methods, i.e., degumming at high temperature-high pressure and enzymatic degumming under different process conditions. The results were compared with conventional method in terms of fiber whiteness, brightness, weight loss, breaking strength and elongation. The conventional process, enzymatic process with 8% savinase and 1100 C in the high temperature process results were comparable, which indicated that alternative methods can be used for degumming of sericin.

Keywords

Silk, eco-friendly, enzyme, protease, degumming, sericin

İPEK LİFLERİNDE ALTERNATİF ÇEVRE DOSTU YÖNTEMLERLE SERİSİN GİDERME

Abstract

Serisin ve fibroinden oluşarak kompozit bir yapı oluşturan ipek lifleri Bombyx Mori türü ipek böceği tarafından eğrilmektedir. Fibroin ve fibroini bir arada tutan doğal çimento olan serisin ham ipeğin ağırlıkça sırasıyla % 75 ve % 25’ ini oluşturur. Serisin, geleneksel olarak iplikten Marsilya sabunu ile alkali pH ortamında uzaklaştırılır. Bu çalışmada ipek lifinden serisin uzaklaştırma işlemi yüksek sıcaklık-yüksek basınç ve enzimatik yöntemlerle farklı proses şartları altında yapılmıştır. Sonuçlar konvansiyonel proses ile beyazlık, parlaklık, ağırlık kaybı, kopma mukavameti ve uzaması bakımından karşılaştırılmıştır. Konvansiyonel, % 8 savinaz enzimi ile yapılan enzimatik ve 1100 C’ de yüksek sıcaklık yöntemleriyle elde edilen sonuçlar birbirlerine benzerdir. Bu sonuçlar, serisin sökmede alternatif yöntemlerin kullanılabileceğini göstermektedir.

Keywords

İpek, çevre dostu, enzim, proteaz, serisin sökme, serisin

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