Figure 5.4. (a) PHB fibers electrospun from 5% chloroform solution and (b) the relationship of diameter and electrode distance solution . HFA was removed by exposing the electrospun fibers to methanol which served as a coagulant in the post-treatment process. Fiber diameters obtained ranged from 100 to 1000 nm. The research group also reported the production of fibers made from recombinant hybrid silk using a genetic engineering technique. Another possible option to produce nanofibers from silk fibroin by co-spinning with a polymer that electrospins easily was reported by Fridrikh .
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