Mao Cui, Huang Jinrui, Zhu Yutian, Jiang Wei, Tang Qingxin, Ma Xiaojing
†State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
‡Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China.
J Phys Chem Lett. 2013 Jan 3;4(1):43-7. doi: 10.1021/jz301811b. Epub 2012 Dec 14.
We present a simple but efficient route to prepare a highly anisotropic conductive plastic thin film from the polypropylene/(styrene-ethylene/butadiene-styrene) triblock copolymer/graphene blend via shear-induced self-assembly. Under the shear-flow induction, GE nanosheets dispersed in the polymer matrix can spontaneously assemble into ordered parallel stripes, which endow the materials significantly conductive anisotropy. The electrical resistivity in the direction parallel to the graphene stripes is almost four orders of magnitude lower than that which is perpendicular to the stripes. This study provides a new method for the precise control of the organization of functional nano-objects in polymer matrix, which can be widely extended to the fabrication of other multifunctional anisotropic materials of interest in various fields.
我们展示了一种简单而有效的途径，通过剪切诱导自组装从聚丙烯/（苯乙烯-乙烯/丁二烯-苯乙烯）三嵌段共聚物/石墨烯共混物制备高度各向异性的导电塑料薄膜。在剪切流诱导下，分散在聚合物基体中的石墨烯纳米片可自发组装成有序的平行条纹，赋予材料显著的导电各向异性。平行于石墨烯条纹方向的电阻率比垂直于条纹方向的电阻率低近四个数量级。本研究为精确控制聚合物基体中功能纳米物体的组织提供了一种新方法，可广泛扩展到制备各种领域中其他感兴趣的多功能各向异性材料。
