Processing, Properties and Morphology of Optical Limiting Silk Membranes
Final rept. 1 Mar 2003-28 Feb 2006
AKRON UNIV OH INST OF POLYMER SCIENCE
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This Final Report is in memory of the PI Professor Ronald Eby who passed away in Sep 2006. The goal of his program was to provide the basis for membranes and coatings that will absorb strong IR radiation to protect DOD sensors. Their approach is to use the Green Fluorescent Protein GFP to provide the absorption and silk protein to provide a good compatible matrix. They have previously demonstrated that GFP molecules can be incorporated into cast membranes of silk from B. mori in sufficient concentration to maintain their nonlinear strong absorption properties. The membranes resisted visible damage to peak fluences of 0.1-0.2 Jsq cm. However, the cast membranes were somewhat inhomogeneous with respect to the GFP distribution. Therefore, they were pursuing other processing methods. At present, they were producing membranes of electrospun fibers from solutions made with liquid silk from the gland of B. mori mixed with GFP. Electrospinning is rapid and allows less separation of the GFP.
- Medicine and Medical Research