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The Role of Silk Sericin during the Spinning Process of Silk Fiber(I) - The Effect of Silk Sericin on the Crystallization and Gelation of Silk Fibroin -  

Oh, Han-Jin (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University)
Kim, Moo-Kon (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University)
Lee, Ji-Young (National Instrumentation Center for Environmental Management, Seoul National University)
Lee, Ki-Hoon (Department of Biosystems & Biomaterials Science and Engineering, Seoul National University)
Publication Information
Textile Science and Engineering / v.46, no.5, 2009 , pp. 289-294 More about this Journal
Abstract
The effect of sericin on the crystallization and gelation of fibroin was studied. We used urea-mercaptoethanol for extraction of sericin from silkworm cocoons. The degradation of sericin during extraction could be minimized and the molecular weight of sericin was in the range of 10-400 kDa. Based on the result of time-resolved FTIR-ATR spectra, the crystallization of fibroin was retarded in the presence of urea-mercaptoethanol extracted sericin like as previously reported hot-water extracted sericin. The gelation time of fibroin was also delayed in the presence of sericin. Interestingly same delaying effect could be also observed when fibroin and sericin were immiscible. These results show that sericin might have more active role in the spinning process of silk fiber.
Keywords
silk; fibroin; sericin; spinning mechanism; crystallization; gelation;
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