Wei Peiran, Bhat Gulzar A, Cipriani Ciera E, Mohammad Hamza, Schoonover Krista, Pentzer Emily B, Darensbourg Donald J
Soft Matter Facility, Texas A&M University, 1313 Research Parkway, College Station, TX, 77845, USA.
Centre for Interdisciplinary Research and Innovations, University of Kashmir, Srinagar, Jammu and Kashmir, 190006, India.
Angew Chem Int Ed Engl. 2022 Sep 12;61(37):e202208355. doi: 10.1002/anie.202208355. Epub 2022 Aug 8.
We report the facile synthesis and 3D printing of a series of triblock copolymers consisting of soft and hard blocks and demonstrate that alkene pendant groups of the hard block can be covalently modified. The polymers are prepared using a salenCo(III)TFA/PPNTFA binary catalyst system and 1,2-propanediol as a chain transfer agent, providing an efficient one-pot, two-step strategy to tailor polymer thermal and mechanical properties. Thixotropic inks suitable for direct ink write printing were formulated by dissolving the block copolymers in organic solvent and dispersing NaCl particles. After printing, porous structures were produced by removing solvent and NaCl with water to give printed structures with surfaces that could be modified via UV-initiated thiol-ene click reactions. Alternatively, a tetra-thiol could be incorporated into the ink and used for cross-linking to give objects with high solvent resistance and selective degradability.
我们报道了一系列由软段和硬段组成的三嵌段共聚物的简便合成及3D打印方法，并证明硬段的烯烃侧基可进行共价修饰。这些聚合物是使用salenCo(III)TFA/PPNTFA二元催化剂体系和1,2 - 丙二醇作为链转移剂制备的，提供了一种高效的一锅两步策略来调整聚合物的热性能和机械性能。通过将嵌段共聚物溶解在有机溶剂中并分散NaCl颗粒，配制出适用于直接墨水书写打印的触变墨水。打印后，通过用水去除溶剂和NaCl来制备多孔结构，从而得到具有可通过紫外光引发的硫醇 - 烯点击反应进行修饰的表面的打印结构。或者，可以将四硫醇掺入墨水中并用于交联，以得到具有高耐溶剂性和选择性降解性的物体。
