Bones and muscles, made from polyethylene with carbon nanotubes, similar to the real thing.
(Photo a press-services of nust “MISIS”.)
When it comes to dentures, or just about any foreign material which must be introduced into the human body, immediately raises the question of how this material body interact. For example, according to the mechanics he is extremely good, but also very toxic. And if we suddenly find a material that can easily “make friends” with living tissues, then there is another problem – it turns out, wears out quickly.
Researchers from the National research technological University “MISIS” has developed the material based on which you can create durable and safe replacement of bones, joints and muscles.
Until now, the only acceptable basis for the artificial joint is considered with a very long polyethylene molecules, which are not known for durability . But it turned out that it could be strengthened by carbon nanotubes, whereby the wear resistance is increased in two times. According to calculations, the service life of the implant from such a modified polyethylene will be more than 15 years.
Replacement of bone from a new material created using the methods of solid phase mixing and timepressure, and to create pores inside the used supercritical fluid. Under certain conditions it is transformed from water to gas and evaporates, leaving pores, the content of which the material is 80%. The result is a structure similar to real bone: solid on the outside and porous inside.
According to Fyodor Senatova, who together with his colleagues developed the material for all the wear it’s great spread that can be very useful for surgeons; in addition, the new polyethylene remembers the form, that is, if you squeeze it, and then put in the right place, he straightened. The shape memory effect will reduce the operation time and make it easier.
New polyethylene can also be used in artificial muscle – when cooling it shrinks and expands when warm, as if mimicking the contraction and stretching of muscles; however, there still need more to learn how to control these muscles, and as a movement will depend on the ambient temperature. The material will be used not only for humans, but also to create the more flexible robots.
According to the press service of the nust “MISIS”.