Suitable electrospinning approaches for recombinant spider silk proteins

Abstract

Among the versatile opportunities of processing recombinant spider silk proteins into coatings, hydrogels, particles, fibrils and foams, electrospinning provides a further highly important morphology: submicron- and nanofibers. These fibers display a high surface-to-volume ratio, which, in combination with the silk's biocompatibility, flexibility and functionality allows various applications including drug-delivery, tissue engineering, wound dressings as well as particle filtration from liquid or gas. Based on the chosen application, individual spider silk proteins can be spun out of a choice of solvents using different spinning techniques in order to achieve the desired properties of the fibers. In this perspective article so far used electrospinning solvents, techniques and collectors are displayed and brought into context with their possible application.

Keywords

• Centrifugal electrospinning
• Nanomaterials
• Nonwoven fabrics
• Fourier-transform infrared spectroscopy
• Silk post-treatment