3D打印多孔热固性聚酰亚胺含油复合材料  

3D Printing of Porous Thermosetting Polyimide Composite with Oil Impregnated

作　　者：丁镜红 杨昌 王梓桐 郭玉雄 郭蕊 宫琛亮[2] 胡海媛[1] 王晓龙[1] 王齐华[1] DING Jinghong;YANG Chang;WANG Zitong;GUO Yuxiong;GUO Rui;GONG Chenliang;HU Haiyuan;WANG Xiaolong;WANG Qihua(Sate Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;Department of Chemistry and Chemical Engineering,Lanzhou University,Gansu Lanzhou 730000,China;Hubei Key Laboratory of Hydroelectric Machinery Design&Maintenance,China Three Gorges University,Yichang 443000,China;Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering,Yantai 264006,China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [2]兰州大学化学化工学院,甘肃兰州730000 [3]三峡大学机械与动力学院水电机械设备设计与维护湖北省重点实验室,湖北宜昌443000 [4]烟台先进材料与绿色制造山东省实验室,山东烟台264006

出　　处：《摩擦学学报》2022年第5期888-899,共12页Tribology

基　　金：国家自然科学基金(51935012,51775538,21975112);中国科学院“西部之光”交叉创新团队项目;甘肃省科技计划重点研发项目(21YF5FA139)资助。

摘　　要：以氯化钠(NaCl)作为致孔剂与流变性能调节剂,碳纤维(CF)作为增强填料与流变性能调节剂,苯乙炔基封端聚酰胺酸溶液(PAA)作为基体树脂,配制适用于直书写3D打印的复合墨水,室温下打印成形后经热固化处理和NaCl刻蚀去除后制备了多孔热固性聚酰亚胺/碳纤维(TSPI/CF)复合材料.研究表明:NaCl与CF对复合墨水的流变学性能具有好的调节作用;打印制备的TSPI/CF复合材料具有低的各向同性尺寸收缩和优异的耐热性能,且耐热性能随着CF含量的增加而提高;CF含量升高,TSPI/CF复合材料的孔隙率提高,平均孔径降低,力学性能增强;多孔TSPI/CF复合材料表现出优异的储油、出油性能以及浸油摩擦学性能.Thermosetting Polyimide(TSPI)has been widely utilized as an kind of engineering material due to the excellent heat resistance properties,e.g.high mechanical strength,nonflammability,and UV-irradiation resistant.Nevertheless,the manufacturing of porous TSPI or TSPI with complicated structures by the traditional manufacturing methods is still a highly challenging topic because of the unobservable melt point and the poor solubility in organic solvents.The emerging additive manufacturing,generally known as three-dimensional(3D)printing,could translate digital model into physical components based on the principle of layer-by-layer stacking,which fortunately,has the capability of realizing the fabrication of porous TSPI with complex structures by a convenience strategy.Herein,direct ink writing(DIW)3D printing technique is employed.DIW requires ink with moderate rheological properties including shear-shinning,viscoelasticity and rapid thixotropic recovery,which is critical to achieve the distortion-free and accurate3D objects.In this work,3D printing of carbon fiber(CF)filled porous TSPI/CF composites were realized via the DIW strategy.The printable composite inks for the DIW 3D printing were prepared by using the phenylethynyl-terminated polyamide acid(PAA)solution as matrix,the sodium chloride(NaCl)and carbon fiber(CF)as not only the rheology modifier but the pore-forming template and the reinforcing filler,respectively.The results showed that both NaCl and CF improved the rheological behavior of the inks to make them good self-supporting inks to realize objects with various shapes and complicated structures by the DIW 3D printing at room temperature.Then,the printed objects were turned into the porous TSPI/CF composites by the thermal treatment followed by the etching of the NaCl.It was found that the post-treatment resulted in the dimension shrinkage,which however was low and isotropic.The pores in the TSPI/CF composites were found to be interconnected with the mean diameter of 358.8 nm and the porosity of 66.12%.I

关 键 词：热固性聚酰亚胺 直书写3D打印 碳纤维 摩擦学性能 

分 类 号：TH117.1[机械工程—机械设计及理论] TH145.4[一般工业技术—材料科学与工程]