3D Printed CO 2 ‐Based Triblock Copolymers and Post‐Printing Modification
3D Printed CO 2 ‐Based Triblock Copolymers and Post‐Printing Modification
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3D 打印 CO 2 — 基于三嵌段共聚物和打印后改性
DOI：
10.1002/anie.202208355
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Darensbourg, Donald J.
中科院分区：
文献类型：
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作者：
Wei, Peiran;Bhat, Gulzar A.;Cipriani, Ciera E.;Mohammad, Hamza;Schoonover, Krista;Pentzer, Emily B.;Darensbourg, Donald J.
我们报告了一系列由软嵌段和硬嵌段组成的三嵌段共聚物的简易合成和3D打印，并证明了硬嵌段的烯烃侧基可以被共价修饰。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聚合物，提供了有效的一锅法，两步策略来定制聚合物的热和机械性能。通过将嵌段共聚物溶解在有机溶剂中并分散NaCl颗粒来配制适合于直接油墨书写印刷的触变油墨。印刷后，通过用水去除溶剂和NaCl来产生多孔结构，以得到具有可以通过UV引发的硫醇-烯点击反应改性的表面的印刷结构。或者，可以将四硫醇掺入油墨中并用于交联，以获得具有高耐溶剂性和选择性降解性的物体。
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.