利用贝壳结构线材3D打印GO/PLA复合材料

3D Printing of Graphene Oxide/PLA Composites from Nacre-inspired Fibers

主要设计一种利用3D打印技术,结合贝壳仿生结构来改性传统塑料的方法,制备具有较高机械强度的GO/PLA复合材料。研究打印速度、喷头温度、平台温度、填充率、光栅角度等因素对样品力学性能的影响;利用单因素分析法确定为最佳打印参数,打印速度20mm/s、喷嘴温度150℃、平台温度60℃、填充率100%。当氧化石墨烯(Graphene oxide, GO)的质量分数为1%时,GO/PLA复合材料表现出优异的力学性能,在保证材料较高断裂伸长率的同时,抗拉强度提高了33.4%。该3D打印螺旋纤维的工艺可广泛应用于各种二维材料和结构复合材料的制备与研究。

The GO dispersion is sprayed on a polylactic acid(PLA)film, the GO/PLA composite fiber is prepared with an anti-shell structure using the transverse shear method, and then the GO/PLA spiral fiber is printed with fused deposition modeling(FDM).The printing speed in 20 mm/s, nozzle temperature at 150℃,platform temperature at 60℃ and 100% filling ratio were identified as optimal printing parameters. In the composite fiber, GO nanosheets are arranged along the axial direction, and the orientation of GO can be easily controlled by adjusting the printing parameters. The characterization of mechanical properties proves that, when the GO content is 1 wt%,the printed GO/PLA tensile sample show excellent mechanical properties. While ensuring a high elongation at break of the material, the tensile strength is increased by 33.4%. The 3 D printing process of spiral fibers proposed by us can be widely used in the preparation and research of various two-dimensional materials and structural composite materials.