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Antheraea pernyi silk fiber: a potential resource for artificially biospinning spider dragline silk.

Zhang Y, Yang H, Shao H, Hu X - J. Biomed. Biotechnol. (2010)

Bottom Line: It is surprising that the stress-strain curves of the A. pernyi fibers show similar sigmoidal shape to those of spider dragline silk.It should be noted that this breaking energy of the A. pernyi silk approaches that of spider dragline silk.The tensile properties, the optical orientation and the beta-sheet structure contents of the silk fibers are remarkably increased by raising the spinning speeds up to 95 mm/s.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.

ABSTRACT
The outstanding properties of spider dragline silk are likely to be determined by a combination of the primary sequences and the secondary structure of the silk proteins. Antheraea pernyi silk has more similar sequences to spider dragline silk than the silk from its domestic counterpart, Bombyx mori. This makes it much potential as a resource for biospinning spider dragline silk. This paper further verified its possibility as the resource from the mechanical properties and the structures of the A. pernyi silks prepared by forcible reeling. It is surprising that the stress-strain curves of the A. pernyi fibers show similar sigmoidal shape to those of spider dragline silk. Under a controlled reeling speed of 95 mm/s, the breaking energy was 1.04 x 10(5) J/kg, the tensile strength was 639 MPa and the initial modulus was 9.9 GPa. It should be noted that this breaking energy of the A. pernyi silk approaches that of spider dragline silk. The tensile properties, the optical orientation and the beta-sheet structure contents of the silk fibers are remarkably increased by raising the spinning speeds up to 95 mm/s.

Show MeSH
Stress-strain curves of (a) A. pernyi silks obtained at different spinning speeds, natural cocoon silk of A. pernyi, (b) A. pernyi silk, (c) A. ventricosus spider dragline silk and (d) B. mori silk forcibly reeled at 10 mm/s.
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fig1: Stress-strain curves of (a) A. pernyi silks obtained at different spinning speeds, natural cocoon silk of A. pernyi, (b) A. pernyi silk, (c) A. ventricosus spider dragline silk and (d) B. mori silk forcibly reeled at 10 mm/s.

Mentions: Figure 1(a) shows the stress-strain curves of the A. pernyi fibers obtained at different spinning speeds and the A. pernyi cocoon silk without degumming. To compare the mechanical characteristics of A. pernyi silk, A. ventricosus spider dragline silk, and B. mori silk, the stress-strain curves of these silks reeled at 10 mm/s are shown in Figures 1(b), 1(c), and 1(d), respectively. It can be noticed that the stress-strain curves of the A. pernyi fibers show similar sigmoidal shape to that of the A. ventricosus spider. Three regions can be distinguished in the curves of Figures 1(a), 1(b), and 1(c): an initial linear elastic region (A), a yield region (B), and a hardening region (C). The dragline silks of Argiope trifasciata [40], Nephila pilipes [43], and Nephila edulis [2, 44] also exhibited consistent stress-strain curves with Figure 1(c). The sigmoidal “rubber-like” shape of the stress-strain curves appears to be a common feature characterizing spider dragline silk and A. pernyi silk.


Antheraea pernyi silk fiber: a potential resource for artificially biospinning spider dragline silk.

Zhang Y, Yang H, Shao H, Hu X - J. Biomed. Biotechnol. (2010)

Stress-strain curves of (a) A. pernyi silks obtained at different spinning speeds, natural cocoon silk of A. pernyi, (b) A. pernyi silk, (c) A. ventricosus spider dragline silk and (d) B. mori silk forcibly reeled at 10 mm/s.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2864894&req=5

fig1: Stress-strain curves of (a) A. pernyi silks obtained at different spinning speeds, natural cocoon silk of A. pernyi, (b) A. pernyi silk, (c) A. ventricosus spider dragline silk and (d) B. mori silk forcibly reeled at 10 mm/s.
Mentions: Figure 1(a) shows the stress-strain curves of the A. pernyi fibers obtained at different spinning speeds and the A. pernyi cocoon silk without degumming. To compare the mechanical characteristics of A. pernyi silk, A. ventricosus spider dragline silk, and B. mori silk, the stress-strain curves of these silks reeled at 10 mm/s are shown in Figures 1(b), 1(c), and 1(d), respectively. It can be noticed that the stress-strain curves of the A. pernyi fibers show similar sigmoidal shape to that of the A. ventricosus spider. Three regions can be distinguished in the curves of Figures 1(a), 1(b), and 1(c): an initial linear elastic region (A), a yield region (B), and a hardening region (C). The dragline silks of Argiope trifasciata [40], Nephila pilipes [43], and Nephila edulis [2, 44] also exhibited consistent stress-strain curves with Figure 1(c). The sigmoidal “rubber-like” shape of the stress-strain curves appears to be a common feature characterizing spider dragline silk and A. pernyi silk.

Bottom Line: It is surprising that the stress-strain curves of the A. pernyi fibers show similar sigmoidal shape to those of spider dragline silk.It should be noted that this breaking energy of the A. pernyi silk approaches that of spider dragline silk.The tensile properties, the optical orientation and the beta-sheet structure contents of the silk fibers are remarkably increased by raising the spinning speeds up to 95 mm/s.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China.

ABSTRACT
The outstanding properties of spider dragline silk are likely to be determined by a combination of the primary sequences and the secondary structure of the silk proteins. Antheraea pernyi silk has more similar sequences to spider dragline silk than the silk from its domestic counterpart, Bombyx mori. This makes it much potential as a resource for biospinning spider dragline silk. This paper further verified its possibility as the resource from the mechanical properties and the structures of the A. pernyi silks prepared by forcible reeling. It is surprising that the stress-strain curves of the A. pernyi fibers show similar sigmoidal shape to those of spider dragline silk. Under a controlled reeling speed of 95 mm/s, the breaking energy was 1.04 x 10(5) J/kg, the tensile strength was 639 MPa and the initial modulus was 9.9 GPa. It should be noted that this breaking energy of the A. pernyi silk approaches that of spider dragline silk. The tensile properties, the optical orientation and the beta-sheet structure contents of the silk fibers are remarkably increased by raising the spinning speeds up to 95 mm/s.

Show MeSH