Thionolactone as Resin Additive to Prepare (bio)degradable 3D Objects via VAT Photopolymerization.
Thionolactone as Resin Additive to Prepare (bio)degradable 3D Objects via VAT Photopolymerization.
复制标题
硫代内酯作为树脂添加剂，通过 VAT 光聚合制备（生物）可降解 3D 物体。
作者：
Noémie Gil;Constance Thomas;R. Mhanna;Jessica Mauriello;Romain Maury;B. Leuschel;J. Malval;J. Clément;D. Gigmes;Catherine Lefay;O. Soppera;Yohann Guillaneuf
3D打印，特别是VAT光聚合，可产生具有高热、化学和机械性能的交联材料。然而，这种稳定性与可降解性和可再循环性/可再循环性不相容。我们在这里表明，硫代内酯，特别是二苯并[c，e]-氧杂环庚烷-5-酮（DOT）可以用作添加剂（2重量%）的丙烯酸酯基树脂，通过自由基开环聚合过程引入弱键到网络中。少量的添加剂仅允许略微改变树脂的可印刷性，保持其分辨率完整并保持3D物体的机械性能。具有添加剂的树脂用于UV微加工和双光子立体光刻设置以及商业3D打印机。所制造的物体被证明在碱性溶剂中以及在自制的堆肥中降解。然而，退化的速率取决于物体的大小。该特征用于制备具有可容易溶解的支撑结构的3D物体。
3D printing and especially VAT photopolymerization leads to cross-linked materials with high thermal, chemical and mechanical properties. Nevertheless, such stability is incompatible with degradability and re/upcyclability. We showed here that thionolactone and especially dibenzo[c,e]-oxepane-5-thione (DOT) could be used as an additive (2 wt%) to acrylate-based resins to introduce weak bonds into the network via a radical ring-opening polymerization process. The low amount of additive allows to only slightly modify the printability of the resin, keep intact its resolution and maintain the mechanical properties of the 3D object. The resin with additive was used in UV microfabrication and 2-photon stereolithography setup and commercial 3D printers. The fabricated objects were shown to degrade in basic solvent as well in a home-made compost. The rate of degradation is nonetheless dependent of the size of the object. This feature was used to prepare 3D objects with support structures that could be easily solubilized.