In this work, the preparation and fabrication of elastomeric opal films revealing reversible mechanochromic and pH‐responsive features are reported. The core–interlayer–shell (CIS) particles are synthesized via stepwise emulsion polymerization leading to hard core (polystyrene), crosslinked interlayer (poly(methyl methacrylate‐co‐allyl methacrylate), and soft poly(ethyl acrylate‐co‐butyl acrylate‐co‐(2‐hydroxyethyl) methacrylate) shell particles featuring a size of 294.9 ± 14.8 nm. This particle architecture enables the application of the melt‐shear organization technique leading to elastomeric opal films with orange, respectively, green brilliant reflection colors dependent on the angle of view. Moreover, the hydroxyl moieties as part of the particle shell are advantageously used for subsequent thermally induced crosslinking reactions enabling the preparation of reversibly tunable mechanochromic structural colors based on Bragg's law of diffraction. Additionally, the CIS particles can be loaded upon extrusion or chemically by a postfunctionalization strategy with organic dyes implying pH‐responsive features. This convenient protocol for preparing multi‐responsive, reversibly stretch‐tunable opal films is expected to enable a new material family for anti‐counterfeiting applications based on external triggers.

中文翻译：

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染料负载的机械变色和pH响应弹性蛋白石膜

在这项工作中，报道了具有可逆的机械变色和pH响应特性的弹性蛋白石膜的制备和制造。核-夹层-壳（CIS）颗粒是通过逐步乳液聚合反应合成的，从而产生硬核（聚苯乙烯），交联夹层（聚（甲基丙烯酸甲酯-共-甲基丙烯酸烯丙酯）和软聚（丙烯酸乙酯-共-丙烯酸丁酯）合作-（2-羟乙基）甲基丙烯酸酯）壳颗粒，尺寸为294.9±14.8 nm。这种颗粒结构使熔体剪切组织技术得以应用，从而导致弹性蛋白石膜分别具有橙色，取决于视角的绿色明亮反射色。此外，作为颗粒壳的一部分的羟基部分有利地用于随后的热诱导的交联反应，从而能够基于布拉格衍射定律制备可逆可调的机械致变色结构色。此外，通过后功能化策略可以通过挤出或化学负载CIS颗粒来负载CIS颗粒，这暗示了pH响应特征。这种方便的协议可用于准备多响应，