Although spiders hold the market for the strongest silks, they are too aggressive and territorial to be farmed. Incorporating spider DNA into silkworms is the next best alternative, but it is an expensive and difficult-to-scale process. Now, scientists have discovered how the silk naturally produced
Spider silk is strong, but it is hard to farm. New research reveals how silk naturally produced by silkworms can be made 70% stronger than spider silks.
Stress-strain curves of representative artificial and natural silks. Credit: Jingxia Wang, Tiantian Fan, & Zhi Lin “Our finding reverses the previous perception that silkworm silk cannot compete with spider silks on mechanical performance.” —Natural silkworm silk fiber is composed of a core fiber wrapped by silk glue, which interferes with the spinning of the fibers for commercial purposes. To work around this issue, the scientists boiled silk from the common silkwormin a bath of chemicals that could dissolve this glue while minimizing the degradation of silk proteins.
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