单官能团单体对光固化成型用树脂基氧化铝浆料流变性和光敏性能的影响

Effect of Monofunctional Monomers on Rheological and Photosensitive Properties of Resin-Based Alumina Slurry for Stereolithograph

摘要:

从分子结构和官能团的角度研究了单官能团单体对光敏树脂基氧化铝浆料流变性能和光固化性能的影响。以双官能团单体1，6-己二醇二丙烯酸酯（HDDA）和三官能团单体三羟甲基丙烷三丙烯酸酯（TMPTA）为原料，按照HDDA:X:TMPTA=6:3:1的体积比加入单官能团单体X，通过室温磁力搅拌制备出光敏树脂，研究了单官能团单体X和树脂的流变性能。采用机械球磨法制备了30%~50%（体积分数）固相含量的光敏树脂基氧化铝浆料，实现了基于立体光刻（SL）技术的3D打印并制备出了氧化铝坯体。本研究确定了3种具有亲水性和高光固化活性的单官能团单体，即丙烯酰吗啉（ACMO）、丙烯酸2-苯氧乙酯（2-PHEA）和丙烯酸羟乙酯（HEA），优化了光敏树脂，使其具有高活性和高固化精度，可用于制备流变性和光固化性能优异的氧化铝浆料。

Abstract:

The effect of monofunctional monomers on the rheological and photosensitive properties of resin-based Al₂O₃ slurry was studied from the perspective of molecular structure and functional groups. The bifunctional group monomer 1,6-hexanediol diacrylate (HDDA) and triple functional group monomer trimethylolpropane triacrylate (TMPTA) were used as raw materials, adding monofunctional monomers X with a selected volume ratio of V_HDDA:V_X:V_TMPTA=6:3:1. The photosensitive resin was fabricated by magnetically stirring at room temperature (RT), and the rheological properties of monofunctional monomers X and resins were studied. The resin-based alumina slurries with solid content of 30vol%~50vol% were prepared by ball milling, the 3D printing process based on stereolithography (SL) was realized and the alumina bodies were fabricated. The monofunctional monomers acryloylmorpholin (ACMO), 2-phenoxyethyl acrylate (2-PHEA), and hydroxyethyl acrylate (HEA) with hydrophilic groups and high photopolymerization activity were used, and the resins with high activity and photopolymerization accuracy were fabricated, benefiting for fabricating Al₂O₃ slurries with superior rheological and photosensitive properties.