Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda City, Nagano 386-8567, Japan.
Nanoscale Res Lett. 2011 Aug 25;6(1):510. doi: 10.1186/1556-276X-6-510.
Silk sericin (SS)/silk fibroin (SF) blend nanofibers have been produced by electrospinning in a binary SS/SF trifluoroacetic acid (TFA) solution system, which was prepared by mixing 20 wt.% SS TFA solution and 10 wt.% SF TFA solution to give different compositions. The diameters of the SS/SF nanofibers ranged from 33 to 837 nm, and they showed a round cross section. The surface of the SS/SF nanofibers was smooth, and the fibers possessed a bead-free structure. The average diameters of the SS/SF (75/25, 50/50, and 25/75) blend nanofibers were much thicker than that of SS and SF nanofibers. The SS/SF (100/0, 75/25, and 50/50) blend nanofibers were easily dissolved in water, while the SS/SF (25/75 and 0/100) blend nanofibers could not be completely dissolved in water. The SS/SF blend nanofibers could not be completely dissolved in methanol. The SS/SF blend nanofibers were characterized by Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry, and differential thermal analysis. FTIR showed that the SS/SF blend nanofibers possessed a random coil conformation and ß-sheet structure.
丝胶（SS）/丝素（SF）共混纳米纤维通过静电纺丝在二元 SS/SF 三氟乙酸（TFA）溶液体系中生产，该体系是通过混合 20wt.% SS TFA 溶液和 10wt.% SF TFA 溶液制备的，以获得不同的组成。SS/SF 纳米纤维的直径范围为 33 至 837nm，呈圆形横截面。SS/SF 纳米纤维的表面光滑，纤维具有无珠结构。SS/SF（75/25、50/50 和 25/75）共混纳米纤维的平均直径比 SS 和 SF 纳米纤维的直径大得多。SS/SF（100/0、75/25 和 50/50）共混纳米纤维易溶于水，而 SS/SF（25/75 和 0/100）共混纳米纤维不能完全溶于水。SS/SF 共混纳米纤维不能完全溶于甲醇。通过傅里叶变换红外（FTIR）光谱、差示扫描量热法和差示热分析对 SS/SF 共混纳米纤维进行了表征。FTIR 表明 SS/SF 共混纳米纤维具有无规卷曲构象和β-折叠结构。
