A novel polymer should make 3D printing more effective

MATERIALS SCIENTISTS have long sought to emulate biology’s trick of joining materials that have wildly different properties into seamless functional units with no weak points, in the way that bones, connective tissue and skin are joined into limbs. Conventional manufacturing techniques, in which components of different composition are first created, and only then fitted together, make such emulation hard. However, three-dimensional (3D) printing, which permits materials to be blended as they are applied to a growing structure, offers a way to do this in principle. And a group of researchers at America’s Army Research Laboratory and Texas A&M University, in College Station, now think they have turned principle into practice.