3D打印多孔热固性聚酰亚胺含油复合材料

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.

Sodium chloride (NaCl) was used as a porogen and rheology modifier, carbon fiber (CF) served as a reinforcing filler and rheology modifier, and phenylethynyl-terminated polyamic acid solution (PAA) was employed as the matrix resin to prepare a composite ink suitable for direct-write 3D printing. After being printed into shape at room temperature, followed by thermal curing treatment and NaCl etching and removal, porous thermosetting polyimide/carbon fiber (TSPI/CF) composite materials were fabricated. Studies have demonstrated that both NaCl and CF exert favorable regulatory effects on the rheological properties of the composite ink; the as-printed TSPI/CF composites exhibit low isotropic dimensional shrinkage and excellent thermal stability, with the thermal performance improving as the CF content increases; as the CF content rises, the porosity of the TSPI/CF composites increases, the average pore diameter decreases, and the mechanical properties are enhanced; the porous TSPI/CF composites display outstanding oil storage, oil release and oil-impregnated tribological properties.