Research progress of the hottest 3D printing high

Progress in the research of 3D printing high-performance ink materials

release date: Source: Voice of the Chinese Academy of Sciences editor: Yu Jia number of Views: 2687 copyright and disclaimer

core tip: the surface interface research team of the State Key Laboratory of solid lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences has made progress in 3D printing high-performance ink materials. They have developed high-performance polyimide photosensitive resin for 3D printing. With the development of the new material industry supported by the state, its excellent comprehensive performance makes it possible to directly 3D rapid prototyping and manufacturing of components and mechanisms with high precision, high heat resistance and high strength and complex structures

[China Packaging News] the surface interface research team of the State Key Laboratory of solid lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences has made progress in 3D printing high-performance ink materials. They have developed high-performance polyimide photosensitive resin for 3D printing. Its excellent comprehensive properties make it possible to directly 3D rapid prototyping and manufacturing components and mechanisms with high precision, high heat resistance and high strength and complex structures

3d printing technology (also known as additive manufacturing) is an advanced molding technology for rapid manufacturing with special complex structure. Among them, UV curable 3D printing (such as SLA, DLP, etc.) has attracted the attention of 3D printing industry at home and abroad in manufacturing parts with particularly complex shapes (such as hollow) and particularly fine shapes (such as handicrafts, jewelry, etc.) due to its high printing accuracy and good surface quality. However, at present, the resin materials used for UV curing 3D printing are mainly acrylic resin or epoxy resin. The molded parts printed with this kind of resin materials have shortcomings such as poor mechanical strength, poor high temperature resistance, easy moisture absorption and expansion, and poor chemical stability. Most of them can only be used in the environment below 100oC. Therefore, their applications are mainly limited to models, samples, design verification, and art product production, It is difficult to break through the bottleneck of direct manufacturing of parts. Therefore, the development of high-performance 3D printing ink materials to meet the practical application in automotive, aerospace, electronics and other fields with high comprehensive performance requirements has become one of the important challenges and research priorities in the field of 3D printing at home and abroad

through polyimide molecular structure design, researchers have developed fast light curable polyimide resin with excellent solubility and light curable polyimide inks for 3D printing (solvent free and photocurable polyimide inks for 3D printing, J. mater. chem. a doi: 10.1039/c7ta01952a). The glass transition temperature of the 3D printed polyimide material is greater than 200oC. After being treated in a 300oC oven or soaked in hot oil, it does not break and bend, and still maintains good mechanical strength (Figure 1), indicating that it has excellent high-temperature stability and can be used for a long time at a high temperature. Please re tension the tensioning wheel;. The mechanical parts and models with complex structures printed and prepared by using this resin material (Fig. 2) are expected to be developed and applied in the fields of aerospace, automobile manufacturing and microelectronics, providing new opportunities for the direct rapid prototyping manufacturing of high-precision, high heat resistance and high-strength complex structural parts and mechanisms in related fields with 3D printing advanced manufacturing technology

this work was supported by the "light of the west" of the Chinese Academy of Sciences and the "special talent plan" of Lanzhou Institute of Chemical Physics, the natural science foundation of Gansu Province (1606rjza051) and Gansu Primet Technology Co., Ltd. when installing the oil pipe connecting the main body and the dynamometer

Figure 1: DLP 3D printing polyimide oil filter plug and 300oc/3h high temperature baking experiment

Figure 2: DLP 3D printing polyimide high temperature resistant parts (bearings, gears, gearbox covers, etc.)/surface morphology of models and formed parts

source: Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences