提高富勒烯针状晶体拉伸强度的研究（英文）  

A dramatic improvement in the tensile strength of fullerene needle-like crystals

作　　者：Toshio Konno Takatsugu Wakahara Kun'ichi Miyazawa Kazuhiro Marumoto 

机构地区：[1]Division of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan [2]National Institute for Materials Science, 1-1 Namiki , Tsukuba , Ibaraki 305-0044, Japan [3]Imaging Section (IMG ) , Okinawa Institute of Science

出　　处：《新型炭材料》2018年第4期310-315,共6页New Carbon Materials

基　　金：partly supported by the Center of Materials Research for Low Carbon Emission of National Institute for Materials Science;the Japan Society for the Promotion of Science KAKENHI ( No. 26600007)

摘　　要：采用液-液界面沉积法,以甲苯和丙胺为溶剂,合成C_(60)-C_(70)富勒烯针状晶体固溶体。使用聚焦离子束扫描电子显微镜来测试其力学性能,C_(60)-C_(70)富勒烯针状晶体的拉伸强度为58～71 MPa,断裂韧性为1.1～1.3 MPa m^(1/2)。C_(60)-C_(70)富勒烯针状晶体拉伸强度显著高于C_(60)富勒烯针状晶体,其比强度略大于铝。通过富勒烯分子溶剂化可能改变C_(60)-C_(70)富勒烯针状晶体的塑性和断裂韧性。C_(60)-C_(70)富勒烯针状晶体有望用作电极、锚杆及电动给料机线等材料。Needle-like crystals consisting of a solid solution of C（60）-C（70） fullerene were synthesized by a liquid-liquid interfacial precipitation method using toluene and 2-propanol as solvents. A machined crystal with a V-notch was placed in a focused ion beam scanning electron microscope where it was bent until fracture by pushing it with a molybdenum probe to measure its mechanical properties and its fracture surface was examined. The crystals had a tensile strength of 58-71 MPa,which is much higher than C60 fullerene needle-like crystals and slightly larger than alumina,and a fracture toughness of 1. 1-1. 3 MPa m（1/2）. Moreover,it is possible to change the plasticity and fracture toughness of the C（60）-C（70） crystals by solvation of different numbers of fullerene molecules. The C（60）-C（70） fullerene crystals have the potential for use as electrodes,anchors for brittle materials,and ductile wires to carry electricity.

关 键 词：富勒烯纳米须 固溶体 液-液界面沉积 拉伸强度 断裂韧性 

分 类 号：TQ127.11[化学工程—无机化工]