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http://dx.doi.org/10.12772/TSE.2020.57.263

Preparation of Silk Microfibers and Their Application as Reinforcing Fillers for Alginate Hydrogel  

Kim, Ji Hwan (Department of Agriculture, Forestry and Bioresources, Seoul National University)
Kim, Jung Soo (Department of Agriculture, Forestry and Bioresources, Seoul National University)
Lee, Ki Hoon (Department of Agriculture, Forestry and Bioresources, Seoul National University)
Publication Information
Textile Science and Engineering / v.57, no.5, 2020 , pp. 263-270 More about this Journal
Abstract
Silk microfibers (MSFs) prepared directly from silk fibroin fibers (SFFs) have advantages over those prepared from regenerated silk fibroin. These advantages include a simple process and high crystallinity. This study provides preliminary results on preparing MSFs and their application as reinforcing fillers for hydrogels. Compared to previous methods using only NaOH, we suggest more mild conditions by lowering the concentration of NaOH and adding Na2CO3. In our study, the length of the MSFs was less than 200 ㎛ after 6 h of immersion of SFFs in the NaOH/Na2CO3 solution. X-ray diffraction results revealed that MSFs have a similar crystallinity to that of SFFs. When MSFs were added to the alginate solution, the solution exhibited increased viscosity and shear thinning behavior. The alginate/MSF hydrogel had enhanced compressive properties as compared to the alginate hydrogel, and the reinforcing effect was affected by the length of the MSFs.
Keywords
silk; silk microfiber; alginate; hydrogel; filler;
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