Cazin Ines, Ocepek Martin, Kecelj Janez, Stražar Aleš Stanislav, Schlögl Sandra
Polymer Competence Center Leoben GmbH, Sauraugasse 1, A-8700 Leoben, Austria.
Helios Resins, Količevo 65, 1230 Domžale, Slovenia.
Materials (Basel). 2024 Apr 19;17(8):1890. doi: 10.3390/ma17081890.
Driven by environmental considerations, the scientific community has directed great effort towards the synthesis of new materials derived from renewable resources. However, for photocurable resins, most commercially available building blocks still rely on petroleum-based precursors. Herein, we present a simple synthesis route for bio-based acrylate-modified polyester resins, whose viscosity is sufficiently low for processing them with vat photopolymerization 3D printing. The established synthesis route enables the gradual substitution of fossil-based raw materials with bio-based alternatives. The acid number, color and viscosity of the bio-based acrylic resins are characterized and photocurable formulations are prepared by adding a radical photoinitiator. The photopolymerization kinetics, and thermomechanical and mechanical properties of the photopolymers are investigated as a function of the resin structure and benchmarked against a commercially available petroleum-based counterpart. Finally, the processability of the new bio-based resins via digital light processing 3D printing is demonstrated and test specimens are successfully 3D printed with a resolution in the millimeter range.
出于环境方面的考虑，科学界已投入大量精力致力于合成源自可再生资源的新材料。然而，对于光固化树脂而言，大多数市售的基础原料仍依赖于石油基前体。在此，我们展示了一种生物基丙烯酸酯改性聚酯树脂的简单合成路线，其粘度足够低，可用于通过光固化3D打印进行加工。既定的合成路线能够逐步用生物基替代品替代化石基原料。对生物基丙烯酸树脂的酸值、颜色和粘度进行了表征，并通过添加自由基光引发剂制备了光固化配方。研究了光聚合物的光聚合动力学、热机械性能和机械性能与树脂结构的关系，并与市售石油基同类产品进行了对比。最后，展示了新型生物基树脂通过数字光处理3D打印的可加工性，并成功地以毫米级分辨率3D打印出测试样品。
