3D printing of high solid Al 2 O 3 ceramics based on green and renewable photosensitive resin with low viscosity and low shrinkage

作者：Xin Yao, Jun Hu, Xiaojie Li, Wei Wei, Ren Liu, Jingcheng Liu · 发表于：Polymers for Advanced Technologies · 年份：2024 · DOI：10.1002/pat.6330 · 被引用次数：14 · 研究领域：Additive Manufacturing and 3D Printing Technologies、Photopolymerization techniques and applications、Innovations in Concrete and Construction Materials

Abstract A low‐viscosity bio‐based carbamate acrylate was synthesized by the reaction of pentamethylene diisocyanate derived from pentanediamine with a low molecular weight acrylate hydroxyl ester. The carbamate acrylate was used in the 3D printing of ceramics, and a correlation between the solid content and viscosity of the ceramic slurry was observed. The ceramic slurry exhibits good stability and low shrinkage. The results indicate that the viscosity of the ceramic slurry was 2.11 Pa s with a solid content of 80 wt%, which makes it suitable for digital light processing printing. In addition, a new type of photoinitiator called (2,4,6‐trimethylbenzoyl)bis(p‐tolyl)phosphine oxide (TMO) has been applied, demonstrating excellent potential in ceramic slurry. According to its thermogravimetric curve, a debinding and sintering process was designed, and ultimately an Al 2 O 3 device with a density of 94.49% was prepared.