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Tuning of Structural Colors Like a Chameleon Enabled by Shape‐Memory Polymers
Macromolecular Rapid Communications ( IF 4.6 ) Pub Date : 2018-09-12 , DOI: 10.1002/marc.201800518
Senta Schauer 1 , Jeremy J. Baumberg 2 , Hendrik Hölscher 1 , Stoyan K. Smoukov 3, 4, 5
Affiliation  

Nature often uses structuring of materials for coloration rather than incorporating dye molecules, since single‐construction materials are capable of producing any vivid visible color in plants and insects. By precisely engineering features that diffract or scatter light, more recently, humans have created similarly intense non‐fading colors. Stretchable polymer opals have emerged as a single material which can dynamically shift across the whole visible spectrum using structural colors, by temporary stretching or compression. For energy efficiency and practical considerations, however, it is necessary to fix semi‐permanently desired colors without continuous stretching or application of other stimuli or energy. Here, a polymer opal incorporating a shape‐memory polymer embedded in its matrix can keep a particular color fixed without the application of external forces, yet can be reprogrammed to a different fixed color on demand. The influence of the material composition on its optical appearance, shape‐fixity, and shape recovery abilities in controlled stretch experiments is quantified. High‐speed printing‐compatible localized compression pattern imprinting is shown to generate stable but easily erasable color patterns. This opens up the potential for durable and energy‐efficient yet reusable and reconfigurable displays, wearables, or packaging and security labeling based on such polymeric film materials.

中文翻译:

形状记忆聚合物实现的变色像变色龙一样的结构颜色调整

大自然通常使用结构化的材料进行着色,而不是使用染料分子,因为单一结构的材料能够在植物和昆虫中产生任何生动的可见颜色。通过精确地工程设计来衍射或散射光,最近,人类创造了类似强烈的不褪色的颜色。可拉伸的聚合物蛋白石已经成为一种单一材料,它可以通过临时拉伸或压缩,使用结构颜色在整个可见光谱范围内动态移动。但是,出于能效和实际考虑,有必要在不连续拉伸或施加其他刺激或能量的情况下固定半永久性所需的颜色。这里,在其基质中嵌入形状记忆聚合物的蛋白石聚合物可以在不施加外力的情况下保持特定的颜色不变,但可以根据需要将其重新编程为其他固定颜色。在受控拉伸实验中,量化了材料成分对其光学外观,形状固定性和形状恢复能力的影响。高速打印兼容的局部压缩图案压印显示可生成稳定但易于擦除的彩色图案。这为基于此类聚合物薄膜材料的耐用,节能,可重复使用和可重新配置的显示器,可穿戴设备或包装和安全标签打开了潜力。量化了受控拉伸实验中的形状固定性和形状恢复能力。高速打印兼容的局部压缩图案压印显示可生成稳定但易于擦除的彩色图案。这为基于此类聚合物薄膜材料的耐用,节能,可重复使用和可重新配置的显示器,可穿戴设备或包装和安全标签打开了潜力。量化了受控拉伸实验中的形状固定性和形状恢复能力。高速打印兼容的局部压缩图案压印显示可生成稳定但易于擦除的彩色图案。这为基于此类聚合物薄膜材料的耐用,节能,可重复使用和可重新配置的显示器,可穿戴设备或包装和安全标签打开了潜力。
更新日期:2018-09-12
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