面向光固化3D打印陶瓷构件的光敏树脂体系研究  

Photosensitive Resin System for Photocuring 3D Printing Ceramic Components

作　　者：李珊[1] 张宇贝 刘兵山[1] 王功[1] 段文艳 胡传奇 李媛 LI Shan;ZHANG Yubei;LIU Bingshan;WANG Gong;DUAN Wenyan;HU Chuanqi;LI Yuan(Key Laboratory of Space Manufacturing Technology(SMT),Technology and Engineering Centre of Space Utilization,Chinese Academy of Sciences,Beijing 100094,China;Science and Technology on Advanced Functional Composites Laboratory,Aerospace Research Institute of Material and Processing Technology,Beijing 100076,China)

机构地区：[1]中国科学院空间应用工程与技术中心,北京100094 [2]航天材料及工艺研究所,先进功能复合材料技术重点实验室,北京100076

出　　处：《硅酸盐通报》2023年第2期719-727,共9页Bulletin of the Chinese Ceramic Society

基　　金：航天材料及工艺研究所先进功能复合材料技术重点实验室开放课题(6142906210204);中国科学院青年创新促进会(2022160,2021160)。

摘　　要：光敏树脂是光固化3D打印的材料基础,也是光固化3D打印陶瓷的成型媒介。光敏树脂体系影响光固化3D打印陶瓷构件成型过程的收缩率与脱脂过程的应力,本文设计了含环状结构的单官能度树脂、三官能度树脂及引入预聚物及稀释剂的多组分树脂三个树脂体系,测试了三个树脂体系的收缩率,研究表明引入预聚物及稀释剂的树脂体系具有最低的固化收缩率,有效缓解了因固化反应收缩造成的3D打印氧化铝陶瓷素坯开裂的问题。采用热失重分析和热处理实验研究了三个树脂体系的热分解行为,多组分树脂体系具有分阶段热解的特性,采用该树脂体系制备了光敏性氧化铝浆料,优化了光固化打印参数及脱脂气氛,3D打印厚壁实心(12 mm×12 mm×12 mm)样件与大尺寸(?80 mm×50 mm)的氧化铝陶瓷素坯脱脂后均无裂纹等缺陷。The photosensitive resin system affects the shrinkage rate in the molding process of the photocurable 3D printing ceramic components and the stress in the degreasing process. In this paper, three resin systems, including the monofunctional resin with ring structure, the trifunctional resin and the multi-component resin with the introduction of prepolymer and diluent, were designed. The shrinkage rate of the three resin systems was tested. The research shows that the resin system with the introduction of prepolymer and diluent has the lowest curing shrinkage rate, which effectively alleviates the problem of cracking of 3D printed alumina ceramic blank caused by curing reaction shrinkage. The thermal decomposition behavior of three resin systems was studied by thermogravimetric analysis and heat treatment experiments. The multi-component resin system has the characteristics of staged pyrolysis. The photosensitive aluminum oxide slurry was prepared by using this resin system, and the photocuring printing parameters and degreasing atmosphere were optimized. The 3D printing thick wall solid(12 mm×12 mm×12 mm) samples and large sizes(?80 mm×50 mm) aluminum oxide ceramic green body are both degreased without cracks.

关 键 词：光固化3D打印 光敏树脂 厚壁结构 低应力脱脂 陶瓷构件 低收缩 

分 类 号：TB302.2[一般工业技术—材料科学与工程]