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The effect of fibrous structural difference on thermal insulation properties of biological composites: silkworm cocoons

journal contribution
posted on 01.11.2016, 00:00 authored by Xing Jin, Jin Zhang, Christopher HurrenChristopher Hurren, Jingliang LiJingliang Li, Rangam RajkhowaRangam Rajkhowa, Xungai WangXungai Wang
As a biological fibrous structure, silkworm cocoon provides multiple protective functionalities to safeguard the silk moth pupa’s metabolic activity. The mechanism of this protection could be adopted in clothing manufacture to provide more comfortable apparel. In this study, the thermal insulation properties of both domestic Bombyx mori (B. mori) and wild Antheraea pernyi (A. pernyi) cocoons were investigated under both warm and cold environmental conditions. Computational fluid dynamics models have been developed to simulate the heat transfer process through both types of cocoon wall structures. The simulation results show that the wild A. pernyi cocoon reduces the intensity of convection and heat flux between the environment and the cocoon interior and has higher wind resistance than its domestic counterpart. Compared with A. pernyi cocoon, the B. mori cocoon facilitates easy air transfer and decreases the temperature lag when the surrounding conditions are changed. The new knowledge has significant implications for developing biomimetic thermal functional materials.

History

Journal

Textile research journal

Volume

86

Issue

18

Pagination

1935 - 1946

Publisher

Sage

Location

London, Eng.

ISSN

0040-5175

eISSN

1746-7748

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, The Authors