scholarly journals Mechanical properties of Bombyx mori silkworm silk fibre and its corresponding silk fibroin filament: A comparative study

2019 ◽  
Vol 181 ◽  
pp. 108077 ◽  
Author(s):  
Shaoyong Chen ◽  
Mingyue Liu ◽  
Huiming Huang ◽  
Lan Cheng ◽  
Hong-Ping Zhao
Keyword(s):  
Mechanical Properties ◽  
Comparative Study ◽  
Bombyx Mori ◽  
Silk Fibroin ◽  
Silk Fibre ◽  
Silkworm Silk

scholarly journals Mesoscale structure development reveals when a silkworm silk is spun

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Quan Wan ◽  
Mei Yang ◽  
Jiaqi Hu ◽  
Fang Lei ◽  
Yajun Shuai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hierarchical Structure ◽  
Ex Vivo ◽  
Silk Fibre ◽  
Structure Development ◽  
Sequence Of Events ◽  
Spinning Process ◽  
Consolidation Phase ◽  
Definition Of ◽  
Silkworm Silk

AbstractSilk fibre mechanical properties are attributed to the development of a multi-scale hierarchical structure during spinning. By careful ex vivo processing of a B. mori silkworm silk solution we arrest the spinning process, freezing-in mesoscale structures corresponding to three distinctive structure development stages; gelation, fibrilization and the consolidation phase identified in this work, a process highlighted by the emergence and extinction of ‘water pockets’. These transient water pockets are a manifestation of the interplay between protein dehydration, phase separation and nanofibril assembly, with their removal due to nanofibril coalescence during consolidation. We modeled and validated how post-draw improves mechanical properties and refines a silk’s hierarchical structure as a result of consolidation. These insights enable a better understanding of the sequence of events that occur during spinning, ultimately leading us to propose a robust definition of when a silkworm silk is actually ‘spun’.

scholarly journals On the strength of β-sheet crystallites of Bombyx mori silk fibroin

2014 ◽  
Vol 11 (96) ◽  
pp. 20140305 ◽  
Author(s):  
Yuan Cheng ◽  
Leng-Duei Koh ◽  
Dechang Li ◽  
Baohua Ji ◽  
Ming-Yong Han ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Silk Fibroin ◽  
Rupture Strength ◽  
High Strength ◽  
Silk Fibre ◽  
Water Solvent ◽  
Bombyx Mori Silk ◽  
Strength Difference ◽  
Dynamics Simulations ◽  
Β Sheet

Silk fibroin, a natural multi-domain protein, has attracted great attention due to its superior mechanical properties such as ultra-high strength and stretchability, biocompatibility, as well as its versatile biodegradability and processability. It is mainly composed of β-sheet crystallites and amorphous domains. Although its strength is well known to be controlled by the dissociation of protein chains from β-sheet crystallites, the way that water as the solvent affects its strength and the reason that its theoretically predicted strength is several times higher than experimental measurement remain unclear. We perform all-atom molecular dynamics simulations on a β-sheet crystallite of Bombyx mori silk. We find that water solvent reduces the number and strength of hydrogen bonds between β-chains, and thus greatly weakens the strength of silk fibroin. By dissociating protein chains at different locations from the crystallite, we also find that the pulling strength for the interior chains is several times higher than that for the surface/corner chains, with the former being consistent with the theoretically predicted value, while the latter on par with the experimental value. It is shown that the weakest rupture strength controls the failure strength of silk fibre. Hence, this work sheds light on the role of water in the strength of silk fibroin and also provides clues on the origin of the strength difference between theory and experiment.

scholarly journals Ice-regenerated flame retardant and robust film of Bombyx mori silk fibroin and POSS nano-cages

RSC Advances ◽  
2018 ◽  
Vol 8 (17) ◽  
pp. 9063-9069 ◽  
Author(s):  
Luca Valentini ◽  
Silvia Bittolo Bon ◽  
Nicola M. Pugno
Keyword(s):  
Flame Retardant ◽  
Bombyx Mori ◽  
Silk Fibroin ◽  
Simple Method ◽  
Bombyx Mori Silk ◽  
Silk Films ◽  
And Control ◽  
Silkworm Silk

In this study, we present a simple method to prepare and control the structure of regenerated hybrid silkworm silk films through icing.

Surface energy of silk fibroin and mechanical properties of silk cocoon composites

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1640-1647 ◽  
Author(s):  
J. Zhang ◽  
S. Du ◽  
A. Kafi ◽  
B. Fox ◽  
J. L. Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Surface Energy ◽  
Silk Fibroin ◽  
Physiochemical Properties ◽  
Silk Cocoon ◽  
Wild Silkworm ◽  
Silkworm Silk ◽  
Surface Energy Heterogeneity

Both the physical and physiochemical properties of domestic and wild silkworm silk fibroin were studied, including surface energy and surface energy heterogeneity.

Nanomechanical and Microstructural Properties of Bombyx mori Silk Films

2004 ◽  
Vol 841 ◽  
Author(s):  
Donna M. Ebenstein ◽  
Jaehyung Park ◽  
David L. Kaplan ◽  
Kathryn J. Wahl
Keyword(s):  
Mechanical Properties ◽  
Bombyx Mori ◽  
Silk Fibroin ◽  
Microstructural Properties ◽  
Instrumented Indentation ◽  
Micro Raman Spectroscopy ◽  
Mechanical And Structural Properties ◽  
Bombyx Mori Silk ◽  
Silk Films ◽  
Post Deposition

ABSTRACTInstrumented indentation and micro-Raman spectroscopy were used to investigate the mechanical and structural properties of Bombyx mori silk films. Twelve different films were prepared from B. mori silk fibroin protein using a variety of post-deposition processing treatments (e.g. soaking in methanol, soaking in water, stretching, and/or enzymatic etching). The results show that different treatments lead to changes in both the conformation of the silk fibroin protein and the mechanical properties of the films.

Influences of film thickness and fabrication method on the surface structure and mineralization-templating of silk fibroin

RSC Advances ◽  
2014 ◽  
Vol 4 (66) ◽  
pp. 35258-35262 ◽  
Author(s):  
Wei Hao ◽  
David Porter ◽  
Zhengzhong Shao
Keyword(s):  
Calcium Carbonate ◽  
Film Thickness ◽  
Surface Structure ◽  
Bombyx Mori ◽  
Silk Fibroin ◽  
Fabrication Method ◽  
Silk Fibroin Film ◽  
Silkworm Silk

The mineralization templating of Bombyx mori silkworm silk fibroin film on calcium carbonate is found to depend on the β-structure of the surface.

Nanomechanical and Microstructural Properties of Bombyx mori Silk Films

2004 ◽  
Vol 844 ◽  
Author(s):  
Donna M. Ebenstein ◽  
Jaehyung Park ◽  
David L. Kaplan ◽  
Kathryn J. Wahl
Keyword(s):  
Mechanical Properties ◽  
Bombyx Mori ◽  
Silk Fibroin ◽  
Microstructural Properties ◽  
Instrumented Indentation ◽  
Micro Raman Spectroscopy ◽  
Mechanical And Structural Properties ◽  
Bombyx Mori Silk ◽  
Silk Films ◽  
Post Deposition

AbstractInstrumented indentation and micro-Raman spectroscopy were used to investigate the mechanical and structural properties of Bombyx mori silk films. Twelve different films were prepared from B. mori silk fibroin protein using a variety of post-deposition processing treatments (e.g. soaking in methanol, soaking in water, stretching, and/or enzymatic etching). The results show that different treatments lead to changes in both the conformation of the silk fibroin protein and the mechanical properties of the films.

scholarly journals Super-strong and Intrinsically Fluorescent Silkworm Silk from Carbon Nanodots Feeding

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Suna Fan ◽  
Xiaoting Zheng ◽  
Qi Zhan ◽  
Huihui Zhang ◽  
Huili Shao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tissue Engineering ◽  
Bombyx Mori ◽  
Cytotoxic Effect ◽  
Breaking Strength ◽  
Carbon Nanodots ◽  
Blue Fluorescence ◽  
Tissue Engineering Scaffolds ◽  
Great Progress ◽  
Silkworm Silk

Abstract Fluorescent silk is fundamentally important for the development of future tissue engineering scaffolds. Despite great progress in the preparation of a variety of colored silks, fluorescent silk with enhanced mechanical properties has yet to be explored. In this study, we report on the fabrication of intrinsically super-strong fluorescent silk by feeding Bombyx mori silkworm carbon nanodots (CNDs). The CNDs were incorporated into silk fibroin, hindering the conformation transformation, confining crystallization, and inducing orientation of mesophase. The resultant silk exhibited super-strong mechanical properties with breaking strength of 521.9 ± 82.7 MPa and breaking elongation of 19.2 ± 4.3%, improvements of 55.1% and 53.6%, respectively, in comparison with regular silk. The CNDs-reinforced silk displayed intrinsic blue fluorescence when exposed to 405 nm laser and exhibited no cytotoxic effect on cells, suggesting that multi-functional silks would be potentially useful in bioimaging and other applications.

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