Photocuring metal 3D printing based on ink direct writing(DIW)has received widespread attention due to its excellent real-time shape retention ability.As a key component,photosensitive resins have a significant impact on the printability of metal printing slurry and performance of printed workpieces.To investigate their impact on photocuring metal 3D printing,in this article,various photosensitive resins with different structures were synthesized and mixed with metal powder into a series of photocured slurries.The effects of resin structure on the rheological properties,curing behavior,sintering process,and properties of formed workpieces were systematically studied.The results indicate that the side hydroxyl structure in the resin as anchoring group can enhance the interaction between the resin matrix and metal,while the presence of a benzene ring structure can improve the viscosity of the ink,both of which are beneficial for obtaining highly stable metal slurries.The benzene ring structure forms a large amount of residual carbon during debinding process,which significantly reduces the properties of the printed workpiece.Based on the above influencing factors,a UV curable copper 3D printing slurry with the best comprehensive properties using RA-GMA as matrix resin was obtained.The slurry has great stability and printability,and the tensile strength of the printed workpiece after sintering can reach 105.47 MPa,with a thermal conductivity of 203.88 W/(m·K).
NETL
NSTL
万方数据
