Formation and Characterization of Langmuir Silk Films
ARMY NATICK RESEARCH DEVELOPMENT AND ENGINEERING CENTER MA
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Langmuir films were formed from regenerated solubilized cocoons Bombyx mori silk. Pressurearea isotherms and deposition studies indicate the formation of stable films however, due to the molecular weight and solubility nature of silk it has been difficult to determine the area occupied by each protein polymer chain. The thin films were successfully transferred on to various solid supports for analysis. Ellipsometry data indicate a film thickness of 11.6 to 11.9 A. Infrared spectrometry ATR shows wavenumbers at the amide bands of 1624 amide I, 1522 amide II, l258 amide III, and 700.8 amide V, indicative of a silk II structure. TEM micrographs show pores of 300-3500 A in diameter and electron diffraction analysis indicates a polycrystalline structure.
- Polymer Chemistry