Ties That Bind: Evaluation of Collagen I and α-Chitin

Omokanwaye, Tiffany; Wilson, Otto C.

doi:10.1007/978-3-642-14998-6_47

Cited by 1 publication

(2 citation statements)

References 14 publications

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“…nanofibrils and matrix), possibly protein or polysaccharide end chains. In comparison, the cocoons of mulberry silkworms, chitin and collagen are all thermally stable up to 250-3008C [15,16] (see electronic supplementary material, figure S1). Further weight losses between (i) 450 and 6508C and (ii) above 6508C were attributed to (i) charring or further denaturation of organic compounds or breakdown/volatilization of inorganic compounds and (ii) decomposition of only inorganic compounds, respectively (figure 2).…”

Section: Thermal and Thermo-oxidative Stabilitymentioning

confidence: 99%

“…Cocoons of mulberry silkworms, chitin and collagen have a residual weight of less than 5% (see electronic supplementary material, figure S1) [15,16]. The high residual weight of 50-70% of the marine worm tubes and the presence of weight loss peaks much above 6008C (figure 2) represent the high content of inorganic contaminants such as sand particles, attached to the surface of the tubes [11].…”

Section: Thermal and Thermo-oxidative Stabilitymentioning

confidence: 99%

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Housing tubes from the marine worm Chaetopterus sp.: biomaterials with exceptionally broad thermomechanical properties

Shah

Vollrath

Porter

et al. 2014

J. R. Soc. Interface.

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The housing tube material of the marine worm Chaetopterus sp. exhibits thermal stability up to 2508C, similar to other biological materials such as mulberry silkworm cocoons. Interestingly, however, dynamic mechanical thermal analysis conducted in both air and water elucidated the lack of a glass transition in the organic tube wall material. In fact, the viscoelastic properties of the anhydrous and undried tube were remarkably stable (i.e. constant and reversible) between -758C and 2008C in air, and 58C and 758C in water, respectively. Moreover, it was found that hydration and associated-water plasticization were key to the rubber-like flexible properties of the tube; dehydration transformed the material behaviour to glass-like. The tube is made of bionanocomposite fibrils in highly oriented arrangement, which we argue favours the biomaterial to be highly crystalline or cross-linked, with extensive hydrogen and/or covalent bonds. Mechanical property characterization in the longitudinal and transverse directions ascertained that the tubes were not quasi-isotropic structures. In general, the higher stiffness and strength in the transverse direction implied that there were more nanofibrils orientated at +458 and +658 than at 08 to the tube axis. The order of the mechanical properties of the soft-tough tubes was similar to synthetic rubber-like elastomers and even some viscid silks. The complex structure-property relations observed indicated that the worm has evolved to produce a tubular housing structure which can (i) function stably over a broad range of temperatures, (ii) endure mechanical stresses from specific planes/axes, and (iii) facilitate rapid growth or repair.

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Section: Thermal and Thermo-oxidative Stabilitymentioning

confidence: 99%

Section: Thermal and Thermo-oxidative Stabilitymentioning

confidence: 99%