Self-Healing and Reprocessable Terpene Polysiloxane-Based Poly(thiourethane-urethane) Material with Reversible Thiourethane Bonds,Biomacromolecules

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Self-Healing and Reprocessable Terpene Polysiloxane-Based Poly(thiourethane-urethane) Material with Reversible Thiourethane Bonds
Biomacromolecules ( IF 5.5 ) Pub Date : 2023-02-21 , DOI: 10.1021/acs.biomac.2c01230
Yuehan Qian ₁ , Fuhao Dong ₂ , Lizhen Guo ₂ , Shanling Lu ₁ , Xu Xu ₁ , He Liu ₂

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Polyurethane materials will come into contact with different solvents in daily life, and at the same time, they will be subject to different degrees of collision, wear and tear. Failure to take corresponding preventative or reparative measures will result in a waste of resources and an increase in costs. To this end, we prepared a novel polysiloxane with isobornyl acrylate and thiol groups as side groups, which was further used in the preparation of poly(thiourethane-urethane) materials. Thiourethane bonds generated by the click reaction of thiol groups with isocyanates endow poly(thiourethane-urethane) materials with the ability to heal and reprocess. Isobornyl acrylate with a large sterically hindered rigid ring promotes segment migration, accelerating the exchange of thiourethane bonds, which is beneficial to the recycling of materials. These results not only promote the development of terpene derivative-based polysiloxanes but also show the great potential of thiourethane as a dynamic covalent bond in the field of polymer reprocessing and healing.

中文翻译：

具有可逆硫氨酯键的自修复和可再加工萜烯聚硅氧烷基聚（硫氨酯-氨基甲酸酯）材料

聚氨酯材料在日常生活中会接触到不同的溶剂，同时也会受到不同程度的碰撞、磨损。不采取相应的预防或补救措施，将造成资源浪费和成本增加。为此，我们制备了一种以丙烯酸异冰片酯和硫醇基团为侧基的新型聚硅氧烷，并将其进一步用于制备聚（硫氨酯-氨基甲酸酯）材料。硫醇基团与异氰酸酯的点击反应生成的硫代氨基甲酸酯键赋予聚（硫代氨基甲酸酯-氨基甲酸酯）材料修复和再加工的能力。具有大空间位阻刚性环的丙烯酸异冰片酯促进链段迁移，加速硫代氨基甲酸酯键的交换，有利于材料的循环利用。

更新日期：2023-02-21

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