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Plastic ＂see light deformation＂ wide application prospect
time:2016-10-11 13:48 source:未知 click:
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Scientists in the United States and Germany say they have developed plastic for the first time in different wavelengths of light, which can be widely used in industry, medicine and other fields.
The results of the Massachusetts Institute of Technology and the GKSS research center in Germany are published in the new issue of nature, a new issue of nature. The researchers said that this result is based on the shape memory effect of plastic, plastic deformation is limited at a certain temperature, the heating characteristics can be restored to its undeformed shape. For the first time, they make the wavelength of light a condition of the shape memory effect. The researchers say they are embedded in a polymer network of molecules that form so-called "molecular switches" ". They were then stretched to form a light sensitive plastic film, which was irradiated with ultraviolet light at a specific wavelength, which made the polymer molecular networks with a photosensitive polymer group cross and adhered to each other.
When the ultraviolet disappeared due to adhesion molecule network, plastic will remain in tension, but if you use light plastic another wavelength, adhesion will form in the original UV burst, so that the plastic changes back to its original state. The researchers said that in addition to the elongated state, the above method can also be used to create a variety of other shapes of plastic. For example, with a plastic layer two photosensitive film synthesis, when the side in a specific wavelength light irradiation and external force deformation, while the other side still remain flexible, so the plastic can become even arc spiral, and the arc plastic in the signal light irradiation can recover straight into the.
Massachusetts Institute of Technology professor Robert Lange involved in the study, the photosensitive plastic in engineering, manufacturing, medicine and other fields have a wide range of application prospects. For example, in thoracic cardiovascular surgery, it can be made of plastic wire into the vessel, and then the trigger signal fiber transmission a specific wavelength, the plastic line will be "transformed" into a spiral, can support large vessel diameter. At present, scientists have begun to study the application prospects of the new plastic made of the above.