Bioinspired Healable Mechanochromic Function from Fluorescent Polyurethane Composite Film.,ChemistryOpen

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Bioinspired Healable Mechanochromic Function from Fluorescent Polyurethane Composite Film.
ChemistryOpen ( IF 2.5 ) Pub Date : 2019-12-17 , DOI: 10.1002/open.201900295
Xiaoke Song _{1,

2} , Jun-Peng Wang ₁ , Yan Song ₁ , Tao Qi _{1,

2} , Guo Liang Li _{1,

2}

Affiliation

Camouflage and wound healing are two vital functions for cephalopods to survive from dangerous ocean risks. Inspired by these dual functions, herein, we report a new type of healable mechanochromic (HMC) material. The bifunctional HMC material consists of two tightly bonded layers. One layer is composed of polyvinyl alcohol (PVA) and titanium dioxide (TiO₂) for shielding. Another layer contains supramolecular hydrogen bonding polymers and fluorochromes for healing. The as‐synthesized HMC material exhibits a tunable and reversible mechanochromic function due to the strain‐induced surface structure of composite film. The mechanochromic function can be further restored after damage because of the incorporated healable polyurethane. The healing efficiency of the damaged HMC materials can even reach 98 % at 60 °C for 6 h. The bioinspired HMC material is expected to have potential applications in the information encryption and flexible displays.

中文翻译：

荧光聚氨酯复合薄膜的生物启发性可修复变色功能。

伪装和伤口愈合是头足类动物在危险的海洋风险下生存的两个重要功能。受这些双重功能的启发，在这里，我们报告了一种新型的可修复机械变色（HMC）材料。双功能HMC材料由两个紧密粘合的层组成。一层由聚乙烯醇（PVA）和二氧化钛（TiO ₂）进行屏蔽。另一层包含超分子氢键键合聚合物和用于修复的荧光染料。由于应变引起的复合膜表面结构，合成后的HMC材料具有可调节和可逆的变色功能。由于加入了可修复的聚氨酯，因此在损坏后，可以进一步恢复机械变色功能。损坏的HMC材料在60°C下持续6 h的愈合效率甚至可以达到98％。受到生物启发的HMC材料有望在信息加密和柔性显示器中具有潜在的应用。

更新日期：2019-12-17

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