Lebedevaite Migle, Ostrauskaite Jolita, Skliutas Edvinas, Malinauskas Mangirdas
Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Rd. 19, 50254 Kaunas, Lithuania.
Laser Research Center, Vilnius University, Sauletekis Ave. 10, 10223 Vilnius, Lithuania.
Polymers (Basel). 2019 Jan 11;11(1):116. doi: 10.3390/polym11010116.
In this study, acrylated epoxidized soybean oil (AESO) and mixtures of AESO and vanillin dimethacrylate (VDM) or vanillin diacrylate (VDA) were investigated as photosensitive resins for optical 3D printing without any photoinitiator and solvent. The study of photocross-linking kinetics by real-time photorheometry revealed the higher rate of photocross-linking of pure AESO than that of AESO with VDM or VDA. Through the higher yield of the insoluble fraction, better thermal and mechanical properties were obtained for the pure AESO polymer. Here, for the first time, we validate that pure AESO and mixtures of AESO and VDM can be used for 3D microstructuring by employing direct laser writing lithography technique. The smallest achieved spatial features are 1 µm with a throughput in 6900 voxels per second is obtained. The plant-derived resins were laser polymerized using ultrashort pulses by multiphoton absorption and avalanche induced cross-linking without the usage of any photoinitiator. This advances the light-based additive manufacturing towards the 3D processing of pure cross-linkable renewable materials.
在本研究中，研究了丙烯酸酯化环氧大豆油（AESO）以及AESO与二甲基丙烯酸香兰素（VDM）或二丙烯酸香兰素（VDA）的混合物作为无需任何光引发剂和溶剂的用于光学3D打印的光敏树脂。通过实时光流变学对光交联动力学的研究表明，纯AESO的光交联速率高于AESO与VDM或VDA混合物的光交联速率。通过更高的不溶级分产率，纯AESO聚合物获得了更好的热性能和机械性能。在此，我们首次验证了纯AESO以及AESO与VDM的混合物可通过采用直接激光写入光刻技术用于3D微结构化。实现的最小空间特征为1 µm，每秒可获得6900体素的通量。使用超短脉冲通过多光子吸收和雪崩诱导交联对植物源树脂进行激光聚合，无需使用任何光引发剂。这推动了基于光的增材制造朝着纯可交联可再生材料的3D加工发展。
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