Scientists develop artificial skin that is more sensitive than human beings
skin is not only for keeping our inner existence, but also a very useful sensing material. We don't need to rely on vision to confirm that we have successfully grasped objects, we can feel them. This is a capability that engineers at the University of Washington are eager to provide robots, so that they can become more useful in many different tasks, from moving items in warehouses to complex surgery
Jonathan Posner, Professor of mechanical engineering and chemical engineering, said: "We have developed an artificial skin that can feel pressure and shear. This kind of skin simulates the tension and compression felt by human fingers when sliding on the surface, or distinguishes between different textures. When your fingers cross a surface, one side of your fingernail will protrude, and the other side will become tight. We use this effect on the artificial skin to produce asymmetric stretching. We Tiny channels to measure the stretching of the skin are filled with liquid metals similar to mercury. When the geometry of the channels changes, the current flowing through them will also change. "
it is understood that this scalable electronic skin was made in the Washington nano Laboratory of the University of Washington. It is made of silicone rubber, which is usually used in swimming goggles, but it adds a small channel (about the width of human hair) and is filled with conductive liquid metal. The advantage of this conductive liquid metal is that when stretched, it will not crack or metal fatigue, while ordinary wires will. In the experiment, Artificial skin can detect tiny "vibrations, which is even higher than human fingers, at a speed of 800 times per second." Posner continued, "next, we want to show that these sensors can be used to improve the manipulation of objects in a wide range of applications. We need to prove that the use of sensors in complex tasks can enhance the ability of robots and prosthetics."
artificial skin artificial skin is a skin substitute artificially developed in vitro by using the principles and methods of engineering and cell biology. It is used to repair and replace defective skin tissue. According to different components, it can be divided into pure artificial dermis and active composite skin with epidermal cell layer
the skin can not only protect people from dirt or bacteria, but also keep the water in the human body from escaping. When a large area of skin is severely burned or damaged, the doctor must immediately input liquid and protect the wound. If only the superficial skin is damaged, the new skin will regenerate. If the patient is severely burned, the skin cannot be repaired by himself. Usually, the surface skin of other parts of the body must be transplanted to the wound. Making synthetic skin starts with a piece of dermis, which grows a larger area of skin. Skin is one of the important organs of human body, which can be completely renewed once in 60 days
artificial skin is used for the first stage treatment of skin transplantation. Artificial skin protects the wound from infection and promotes the growth of connective tissue, which 1 is due to its low contraction rate. The human immune system will gradually decompose the polymer, and once the patient's own surface skin is implanted, the wound will heal quickly
whether artificial skin can be successfully transplanted depends on whether it can be rapidly vascularized, so that nutrition can be supplied as soon as possible after transplantation. On the one hand, they successfully transferred the gene of a factor that can promote vascularization (VE promotes excellent resources to converge GF in the aggregation area) into human fibroblasts, enabling them to secrete VEGF and promote vascularization; On the other hand, autologous endothelial cells and fibroblasts are implanted into dermal scaffolds through appropriate ways to induce the formation of neovascularization, which completely solves this problem