Why are cobwebs both strong and tough?

Japanese scientists used chemical tools in the laboratory to simulate the orderly ejection of cobwebs from spinnerets, uncovering the mechanism for this natural phenomenon, and providing theoretical basis for simulating the spinning process and creating super-toughened sustainable materials in the future. Related research results were published in the latest “Science Progress” journal.

Cobwebs are in liquid form at the beginning, but within a second, this viscous liquid-like protein would transform. After leaving the spider’s body, something called fibroin will fold and intertwine themselves, building a highly organized structure without the help of any external force.

Said Ali Malai, a structural biologist and biochemist at the Sustainable Resources Science Center of Japan’s Institute of Physical and Chemical Research (RIkagaku KENkyusho), “This self-assembly process could fabricate materials with unique properties.”

Scientists have been trying for years to simulate cobwebs, in hope of creating super-tough and sustainable materials. To this end, they have been studying what chemical inducement could turn the liquid stored in silk gland into cobwebs.

This time, the researchers proposed a new method, using chemical tools in the laboratory to simulate the orderly ejection of cobwebs from spinnerets. They found that a key step of spinning is that spiders need to separate the fibroin from the water buffer wrapped in silk glands-this step will make the fibroin highly concentrated; subsequently, the influx of acidic substances will help the fibroin securely interlocked.