Structure and properties of ultrafine silk fibers produced by Theriodopteryx ephemeraeformis

Reddy, Narendra; Yang, Yiqi

doi:10.1007/s10853-010-4752-5

Cited by 14 publications

(4 citation statements)

References 26 publications

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“…variegata ) (a synonym for Eumeta japonica and Clania variegata ) 21,22 , might be a promising candidate, considering its superior capacity to dangle a heavy weight, summed up by the weights of the larva and its house (generally called larval case, bag, or nest). However, little is known about the mechanical and physical properties of bagworm silks 23–25 .…”

Section: Introductionmentioning

confidence: 99%

A study of the extraordinarily strong and tough silk produced by bagworms

et al. 2019

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Global ecological damage has heightened the demand for silk as ‘a structural material made from sustainable resources’. Scientists have earnestly searched for stronger and tougher silks. Bagworm silk might be a promising candidate considering its superior capacity to dangle a heavy weight, summed up by the weights of the larva and its house. However, detailed mechanical and structural studies on bagworm silks have been lacking. Herein, we show the superior potential of the silk produced by Japan’s largest bagworm, Eumeta variegata . This bagworm silk is extraordinarily strong and tough, and its tensile deformation behaviour is quite elastic. The outstanding mechanical property is the result of a highly ordered hierarchical structure, which remains unchanged until fracture. Our findings demonstrate how the hierarchical structure of silk proteins plays an important role in the mechanical property of silk fibres.

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Section: Introductionmentioning

confidence: 99%

A study of the extraordinarily strong and tough silk produced by bagworms

et al. 2019

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“…Likewise, Hylaphora cecropia cocoons were reported to consist of three layers with properties similar to that of B. mori silk [16]. However, silk produced by bag worms was found to be weak and with considerably different amino acids than those found in common silks [17].…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of Cocoons and Silk Fibers Produced by Attacus atlas

2012

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Silk fibers in the three layers of Attacus atlas (A. atlas) cocoons have morphological structure and tensile properties similar to that of Bombyx mori silk. Attempts are being made to produce silk for commercial applications from cocoons of relatively unknown wild insects due to the unique properties of the fibers and as a source of income and employment. In this research, A. atlas cocoons were used to study the chemical composition, morphology, physical structure and tensile properties of the silk fibers in the cocoons and ability of the fibers to support the attachment and proliferation of mouse fibroblast cells. It was found that A. atlas cocoons consists of outer, intermediate and inner layer with average breaking tenacity of 4.1, 4.3, and 3.6 g/den, respectively similar to that of B. mori silk (4.3-5.2 g/den). The heavier cocoons, less restrictive rearing conditions and good properties of the fibers compared to B. mori silk makes A. atlas a potential alternative to common silks for commercial scale silk production. A. atlas fibers had about 80 % higher optical densities of cells and extensive growth of F-actin compared to B. mori silk fibers.

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“…The thermograms of dSF show two transitions in a range of 30-800ºC. The first transition was observed around 66ºC attributed to the evaporation of water and the second transition was observed at 324ºC due to thermal decomposition of silk fibroin [10,11]. The TGA and DTGA thermogram of neat epoxy show one transition at 381ºC attributed to thermal decomposition of neat epoxy.…”

Section: Resultsmentioning

confidence: 96%

Study of <i>B. Mori</i> Silk Fabric and <i>B. Mori</i> Silk Reinforced Epoxy Composite

Chaisomkul

Suppakarn

Sutapun

2011

AMR

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In this work, degummed(Bombyx mori)silk fabric was used as a bio-reinforcement for epoxy composite.The silk fabric was in a form of plain weaving with 177 ends/10 cm x 201 picks/10 cm. The degummed silk fabric (dSF)/epoxy composites were prepared by hand lay-up with dSF weight fraction of 0.18-0.35. The dSF was characterized using a universal testing machine (UTM) and a thermogravimetric analyzer (TGA). Mechanical properties including tensile properties, and impact property of neat epoxy and epoxy composites were investigated using a UTM and a impact testing machine, respectively. Thermal properties of neat epoxy and dSF/epoxy composites were investigated using a TGA. In addition, morphology of fracture surface of neat epoxy and dSF/epoxy composite were examined via a scanning electron microscope. Tensile strength of dSF was not significantly dependent in direction, was 537.1 N in warp direction, and 555 N in weft direction. In addition, dSF decomposed at 324°C under nitrogen atmosphere. The tensile strength and impact strength of the neat epoxy were higher than those of dSF/epoxy composites. However, tensile strength and impact strength tended to increased with increasing dSF content. On the other hand, Young’s modulus was improved by addition of dSF. The dSF/epoxy composites still fractured in a brittle manner.

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Structure and properties of ultrafine silk fibers produced by Theriodopteryx ephemeraeformis

Cited by 14 publications

References 26 publications

A study of the extraordinarily strong and tough silk produced by bagworms

A study of the extraordinarily strong and tough silk produced by bagworms

Structure and Properties of Cocoons and Silk Fibers Produced by Attacus atlas

Study of <i>B. Mori</i> Silk Fabric and <i>B. Mori</i> Silk Reinforced Epoxy Composite

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