Wooden Helmet from Sweden soon we can say goodbye to polystyrene, the petroleum-based material that is used to make the styrofoam and other known foams.In what appears to be a common bicycle helmet, Swedish engineers replaced styrofoam with a new shock-absorbing material renewable and biodegradable, made entirely from wood.
The helmet-concept is an attempt to draw attention to the possibilities of use of wood as a sustainable alternative to polystyrene and other polymers, synthetic foams, according to professor Lars Wagberg, of the Royal Institute of technology, which developed the wood foam along with his colleague Lennart Bergström.
“Already there are wooden helmets out there, but what is unique here is that this is made entirely of forest products-nothing more. The outer layer is wood veneered, the strips are made of extra strong paper and foam is made of cellulose fibers, “said Wagberg.
Cellulose foam in Wooden Helmet Sweden
The production of the wooden helmet begins with cellulose nanofibers, or fibrils, which are modified and mixed with a foaming agent, water and air.
Through a process known as “Pickering stabilization”, these nanoparticles stabilize air bubbles more efficiently than the traditional use of surfactants, creating a product that the duo called Cellufoam, something like foam.
The resulting material is very strong and flexible-in fact, some bioplastics with vegetal fibers outweigh the carbon fiber.
According to Wagberg, using different types of treatment and combinations with other materials, cellulose foam may become suitable for flame retardants, water filtering and antibacterial surfaces.