Bauer Jens, Izard Anna Guell, Zhang Yunfei, Baldacchini Tommaso, Valdevit Lorenzo
Opt Express. 2020 Jul 6;28(14):20362-20371. doi: 10.1364/OE.395986.
Two-photon polymerization direct laser writing (TPP-DLW) is one of the most versatile technologies to additively manufacture complex parts with nanoscale resolution. However, the wide range of mechanical properties that results from the chosen combination of multiple process parameters imposes an obstacle to its widespread use. Here we introduce a thermal post-curing route as an effective and simple method to increase the mechanical properties of acrylate-based TPP-DLW-derived parts by 20-250% and to largely eliminate the characteristic coupling of processing parameters, material properties and part functionality. We identify the underlying mechanism of the property enhancement as a self-initiated thermal curing reaction, which robustly facilitates the high property reproducibility that is essential for any application of TPP-DLW.
双光子聚合直接激光写入（TPP-DLW）是增材制造具有纳米级分辨率的复杂零件的最通用技术之一。然而，由多个工艺参数的选定组合所导致的广泛机械性能范围对其广泛应用构成了障碍。在此，我们引入一种热后固化途径，作为一种有效且简单的方法，可将基于丙烯酸酯的TPP-DLW衍生零件的机械性能提高20% - 250%，并在很大程度上消除加工参数、材料性能和零件功能之间的特征耦合。我们确定性能增强的潜在机制是一种自引发的热固化反应，这有力地促进了TPP-DLW任何应用所必需的高性能再现性。
