Endocuticle sclerotisation increases the mechanical stability of cuticle

Lu Yi Wang, Mohsen Jafarpour, Chung Ping Lin, Esther Appel, Stanislav N. Gorb, Hamed Rajabi

Research output: Contribution to journalArticle

Abstract

The cuticle plays an important role in the evolutionary success of insects. Many studies on insect cuticles have reported a soft, resilin-rich endocuticle. However, a recent study indicated the presence of a sclerotised endocuticle in the weevil Pachyrhynchus sarcitis kotoensis, which contradicts former knowledge. To understand the degree of sclerotisation in the endocuticle of the weevil and its potential function, we first examined the endocuticle by microscopic and staining techniques. We next performed mechanical tests to measure the material properties of the endocuticle, and numerical simulations to predict the structural effect of the sclerotisation. Our results provide the first evidence of the existence of a sclerotised endocuticle and its remarkable function in improving the mechanical stability of the cuticle. This study highlights the finding of a high degree of sclerotisation in the stiff endocuticle of the weevil, especially the matrix surrounding the fibres. This novel case brings new understanding of cuticle properties and gives promising insights into biomaterial design.

Original languageEnglish
Pages (from-to)8272-8278
Number of pages7
JournalSoft Matter
Volume15
Issue number41
DOIs
Publication statusPublished - 2019 Jan 1

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insects
Mechanical stability
Biocompatible Materials
staining
Materials properties
fibers
Fibers
Computer simulation
matrices
simulation
resilin

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Wang, L. Y., Jafarpour, M., Lin, C. P., Appel, E., Gorb, S. N., & Rajabi, H. (2019). Endocuticle sclerotisation increases the mechanical stability of cuticle. Soft Matter, 15(41), 8272-8278. https://doi.org/10.1039/c9sm01687b

Endocuticle sclerotisation increases the mechanical stability of cuticle. / Wang, Lu Yi; Jafarpour, Mohsen; Lin, Chung Ping; Appel, Esther; Gorb, Stanislav N.; Rajabi, Hamed.

In: Soft Matter, Vol. 15, No. 41, 01.01.2019, p. 8272-8278.

Research output: Contribution to journalArticle

Wang, LY, Jafarpour, M, Lin, CP, Appel, E, Gorb, SN & Rajabi, H 2019, 'Endocuticle sclerotisation increases the mechanical stability of cuticle', Soft Matter, vol. 15, no. 41, pp. 8272-8278. https://doi.org/10.1039/c9sm01687b
Wang, Lu Yi ; Jafarpour, Mohsen ; Lin, Chung Ping ; Appel, Esther ; Gorb, Stanislav N. ; Rajabi, Hamed. / Endocuticle sclerotisation increases the mechanical stability of cuticle. In: Soft Matter. 2019 ; Vol. 15, No. 41. pp. 8272-8278.
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