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Some commonly used cellulose solvents, such as N-methyl-morpholine N-oxide/water (nNMMO/H2O, which is commercially used in the production of regenerated cellulose fibers known as Lyocell), are known for their low volatility—a reason why it is so difficult for them to be completely evaporated during electrospinning. Other solvent systems may contain non-volatile salts that have to be removed after electrospinning (Frey 2008).

A good example of such product development is the self-adhesive elastic retention bandage for wound care, as detailed in Chapter 8. 5. FABRICS AND 3D STRUCTURES “Fabric” usually refers to the two-dimensional (2D) structures formed by the interlacing or binding of fibers and/or yarns, including woven, knit, nonwoven and compound fabrics. There are also threedimensional (3D) structures that are made from fibers and/or yarns and used for special applications. These structures will be briefly introduced in this section.

2009). Gelatin is similar to collagen in mechanical properties, biocompatibility and bioresorbability, but is much less costly, and is therefore related to many biomedical applications. 4. The triple helix structure of collagen. , 2007). , formic acid, acetic acid) or water, must be crosslinked so as to be stable enough in an aqueous environment. Silk processed from cocoons of silkworms (Bombyx mori) has been used as a protein-based biomaterial (like sutures) for thousands of years. In the last few decades, its biocompatibility became somewhat problematic as an implantable material.

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