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当前位置: Science » 技术 » Science子刊:光驱动折纸可自我折叠


摘要 : 2017年3月3日,国际顶尖学术期刊《Science》旗下《Science Advances》杂志上在线发表了美国北卡罗纳大学Jan Genzer研究员的一篇研究论文,论文报道了通过一种特殊的材料可以使折纸自我折叠

2017年3月3日,国际顶尖学术期刊《Science》旗下《Science Advances》杂志上在线发表了美国北卡罗纳大学Jan Genzer研究员的一篇研究论文,论文报道了通过一种特殊的材料可以使折纸自我折叠,被用于塑料杯和泡沫塑料外卖容器的聚苯乙烯在加热时会收缩,这使其成为一种理想的材料。研究人员可把彩色打印和光线相结合,将稀薄的二维塑料进行折叠,使其一步步成为复杂的三维形状。





Sequential self-folding of polymer sheets


Shape plays an important role in defining the function of materials, particularly those found in nature. Several strategies exist to program materials to change from one shape to another; however, few can temporally and spatially control the shape. Programming the sequence of shape transformation with temporal control has been driven by the desire to generate complex shapes with high yield and to create multiple shapes from the same starting material. This paper demonstrates a markedly simple strategy for programmed self-folding of two-dimensional (2D) polymer sheets into 3D objects in a sequential manner using external light. Printed ink on the surface of the polymer sheets discriminately absorbs light on the basis of the wavelength of the light and the color of the ink that defines the hinge about which the sheet folds. The absorbed light gradually heats the underlying polymer across the thickness of the sheet, which causes relief of strain to induce folding. These color patterns can be designed to absorb only specific wavelengths of light (or to absorb differently at the same wavelength using color hues), thereby providing control of sheet folding with respect to time and space. This type of shape programming may have numerous applications, including reconfigurable electronics, actuators, sensors, implantable devices, smart packaging, and deployable structures.

来源: Science Advances 浏览次数:0


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