报告题目：Photocurable resins for 3D printing of soft and elastic materials
报告人：Timothy C. Hughes，CSIRO Manufacturing, Australia
Despite the significate interest in 3D printing, there still remains a need for 3D printing resins with a wider range of properties to enable the printing of functional parts to suit end-use applications rather than just prototypes. The fabrication of soft and elastic parts by 3D printing is challenging. For instance, 3D printing of silicone or polysiloxane is very difficult to achieve, although there are needs to have silicone parts prototyped and customized in patient-specific devices. In general, soft materials are prone to plastic deformation during the 3D printing process. Moreover, the resultant 3D elastomeric object may not have sufficient mechanical properties for functional use.
Here we present our research at CSIRO on the development of new photocurable resins 3D printing designed to meet the needs of the polymer 3D printing industry. The translation of simple photocure chemistry to a DLP printer is not as straight forwards as expected. There are many factors which need to be considering when developing resins for DLP printers, namely: formulation stability, cure time for each layer, plastic deformation, successful initiation of crosslinking reactions, and inhibition of unwanted curing. Here we discuss these requirements and the interplay between them.