title: Structural characteristics and properties of Bombyx mori silk fiber obtained by different artificial forcibly silking speeds.
abstract: To study the spinning condition of natural biopolymer silk, the silk fibers were directly acquired from Bombyx mori silkworm, N140 x C140 by a simple artificial forcibly silking method at the speed of 60, 120, 180 and 240 cm min(-1), respectively and its microstructure and physical properties were evaluated. The fine silk fibers (about 8 microm) were obtained at faster spinning speed, 240 cm min(-1). The tensile properties of silk fibers were remarkably increased with raising the forcibly spinning speeds. The beta-sheet structure contents of silk fibers obtained at higher speed were considerably increased. The fibers obtained by different spinning speeds exhibited a fairly similar X-ray crystallinity, while the degree of molecular orientation increased with decreasing the fiber diameter. The fine silk fibers obtained at higher speed (240 cm min(-1)) exhibited a slightly higher thermal stability, as shown by the upward shift of differential scanning calorimetry (DSC) decomposition temperature.
authors.affiliation: Faculty of Textile Science and Technology, Shinshu University, Tokida 3-15-1, Ueda, Nagano 386-8567, Japan.
authors.forename: Md Majibur Rahman
authors.initials: MM
authors.lastname: Khan
authors.forename: Hideaki
authors.initials: H
authors.lastname: Morikawa
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Gotoh
authors.forename: Mikihiko
authors.initials: M
authors.lastname: Miura
authors.forename: Zha
authors.initials: Z
authors.lastname: Ming
authors.forename: Yuji
authors.initials: Y
authors.lastname: Sato
authors.forename: Masayuki
authors.initials: M
authors.lastname: Iwasa
mesh_terms: D000818:Animals; D012831:Bombyx; D007814:Larva; D017433:Protein Structure, Secondary; D047011:Silk; D013314:Stress, Mechanical
chemical_list: D047011:Silk