Researchers draw inspiration from oyster shells to create a durable cement composite which is more flexible and crack-resistant.
Inspired by the materials found in oyster and abalone shells, Princeton University researchers have created a new, highly versatile cement composite.
According to the team, the results may eventually improve the resistance to cracks in various brittle ceramic materials, such as porcelain and concrete.A few methods have been tried to improve cementitious materials’ low fracture toughness and ductility by adding polymeric, glass, or metallic reinforcements to cementitious composites.
The group drew inspiration for their work on creating materials from biology. In this instance, the group created a composite modeled after nacre, a naturally occurring substance that may be found inside specific shells. Layers of cement paste sheets were alternated with polyvinyl siloxane, a highly flexible polymer. By alternating thin layers of polymer with sheets of cement paste, the researchers were able to produce multi-layered tiny beams.
Composites Nacre Princeton Seashells
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