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Rapid Responsive Mechanochromic Photonic Pigments with Alternating Glassy-Rubbery Concentric Lamellar Nanostructures
ACS Nano ( IF 15.8 ) Pub Date : 2021-04-29 , DOI: 10.1021/acsnano.1c01147 Yun Dong 1 , Zhe Ma 1 , Dong-Po Song 1 , Guiqiu Ma 1 , Yuesheng Li 1
ACS Nano ( IF 15.8 ) Pub Date : 2021-04-29 , DOI: 10.1021/acsnano.1c01147 Yun Dong 1 , Zhe Ma 1 , Dong-Po Song 1 , Guiqiu Ma 1 , Yuesheng Li 1
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Photonic pigment particles prepared via self-assembly have been suffering from their poor mechanical performances; i.e., they can easily be damaged and lose structural color under a compression force. This greatly limits their uses as mechanochromic pigments. Here, a nanoscale concentric lamellar structure of alternating glassy-rubbery microdomains is successfully created within photonic microparticles through a confined self-assembly and photo-cross-linking strategy. The glassy domain is composed of polystyrene, and cross-linked bottlebrush polydimethylsiloxane served as the supersoft elastic domain. The obtained photonic structure not only shows large deformation and visible color changes under a loaded compression force but also rapidly recovers to its original state in less than 1 s (∼0.16 s) upon unloading. Continuously loading-unloading micro compression test indicates that no obvious damage can be identified after 250 cycles, indicating the high durability of the pigments against deformation. These pigments with different reflected colors are simply obtained using bottlebrush block copolymer formulations with tunable weight percentages of polymer additives. The mechanical robust photonic pigments may be useful in many important applications.
中文翻译：
具有交替玻璃态-抢劫同心层状纳米结构的快速响应机械变色光子颜料。
通过自组装制备的光子颜料颗粒的机械性能一直很差。IE，它们很容易被损坏并在压缩力下失去结构颜色。这极大地限制了它们用作机械变色颜料的用途。在这里，通过有限的自组装和光交联策略成功地在光子微粒内创建了交替的玻璃-橡胶微区的纳米级同心层状结构。玻纤域由聚苯乙烯组成，交联的牙刷聚二甲基硅氧烷用作超软弹性域。所获得的光子结构不仅在加载的压缩力下显示出大的变形和可见的颜色变化，而且在卸载后不到1 s（〜0.16 s）即可迅速恢复到其原始状态。连续加载/卸载微压缩测试表明，经过250次循环后，没有发现明显的损坏，表明颜料抗变形的高耐久性。这些具有不同反射颜色的颜料可以简单地使用带有可调整重量百分比的聚合物添加剂的洗瓶刷嵌段共聚物配方获得。机械坚固的光子颜料可能在许多重要应用中有用。
更新日期：2021-05-25
中文翻译：
具有交替玻璃态-抢劫同心层状纳米结构的快速响应机械变色光子颜料。
通过自组装制备的光子颜料颗粒的机械性能一直很差。IE，它们很容易被损坏并在压缩力下失去结构颜色。这极大地限制了它们用作机械变色颜料的用途。在这里，通过有限的自组装和光交联策略成功地在光子微粒内创建了交替的玻璃-橡胶微区的纳米级同心层状结构。玻纤域由聚苯乙烯组成，交联的牙刷聚二甲基硅氧烷用作超软弹性域。所获得的光子结构不仅在加载的压缩力下显示出大的变形和可见的颜色变化，而且在卸载后不到1 s（〜0.16 s）即可迅速恢复到其原始状态。连续加载/卸载微压缩测试表明，经过250次循环后，没有发现明显的损坏，表明颜料抗变形的高耐久性。这些具有不同反射颜色的颜料可以简单地使用带有可调整重量百分比的聚合物添加剂的洗瓶刷嵌段共聚物配方获得。机械坚固的光子颜料可能在许多重要应用中有用。
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