Preparation and mechanical properties of layers made of recombinant spider silk proteins and silk from silk worm

Title data

Junghans, F. ; Morawietz, M. ; Conrad, U. ; Scheibel, Thomas ; Heilmann, A. ; Spohn, U.:
Preparation and mechanical properties of layers made of recombinant spider silk proteins and silk from silk worm.
In: Applied Physics A. Vol. 82 (2006) Issue 2 . - pp. 253-260.
ISSN 1432-0630
DOI: https://doi.org/10.1007/s00339-005-3432-9

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Abstract in another language

Layers of recombinant spider silks and native silks from silk worms were prepared by spin-coating and casting of various solutions. FT-IR spectra were recorded to investigate the influence of the different mechanical stress occurring during the preparation of the silk layers. The solubility of the recombinant spider silk proteins SO1-ELP, C16, AQ24NR3, and of the silk fibroin from Bombyx mori were investigated in hexafluorisopropanol, ionic liquids and concentrated salt solutions. The morphology and thickness of the layers were determined by Atomic Force Microscopy (AFM) or with a profilometer. The mechanical behaviour was investigated by acoustic impedance analysis by using a quartz crystal microbalance (QCMB) as well as by microindentation.

The density of silk layers (d<300 nm) was determined based on AFM and QCMB measurements. At silk layers thicker than 300 nm significant changes of the half-band-half width can be correlated with increasing energy dissipation. Microhardness measurements demonstrate that recombinant spider silk and sericine-free Bombyx mori silk layers achieve higher elastic penetration modules EEP and Martens hardness values HM than those of polyethylenterephthalate (PET) and polyetherimide (PEI) foils.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Biomaterials Faculties > Faculty of Engineering Science > Chair Biomaterials > Chair Biomaterials - Univ.-Prof. Dr. Thomas Scheibel Profile Fields > Advanced Fields > Advanced Materials Profile Fields > Advanced Fields > Molecular Biosciences Profile Fields > Advanced Fields > Polymer and Colloid Science Profile Fields > Emerging Fields > Food and Health Sciences Profile Fields Profile Fields > Advanced Fields Profile Fields > Emerging Fields
Result of work at the UBT:	Yes
DDC Subjects:	600 Technology, medicine, applied sciences 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited:	25 Sep 2015 06:41
Last Modified:	26 Nov 2015 10:51
URI:	https://eref.uni-bayreuth.de/id/eprint/19549