Silks belong to a group of high molecular weight organic
polymers characterized by repetitive hydrophobic and hydrophilic
peptide sequences. Due to the highly repetitive primary
domains, fibrous proteins and especially silk fibroin (SF) assemble
into regular structures during materials formation and can be
considered as Nature's equivalents to synthetic block copolymers
[1–5]. Silks are naturally produced by spiders or insects,
such as Nephila clavipes and Bombyx mori, respectively