The poor environmental stability of natural anthocyanin hinders its usefulness in various functional applications. The objectives of the present study were to enhance the environmental stability of anthocyanin extracted from Lycium ruthenicum by mixing it with montmorillonite to form an organic/inorganic hybrid pigment, and then to synthesize allochroic biodegradable composite films by incorporating the hybrid pigment into sodium alginate and test them for potential applications in food testing and packaging. The results of X-ray diffraction, Fourier-transform infrared spectroscopy, and use of the Brunauer–Emmett–Teller method and zeta potential demonstrated that anthocyanin was both adsorbed on the surface and intercalated into the interlayer of montmorillonite via host–guest interaction, and the hybrid pigments obtained allowed good, reversible, acid/base behavior after exposure to HCl and NH₃ atmospheres. The composite films containing hybrid pigments had good mechanical properties due to the uniform dispersion of the pigments in a sodium alginate substrate and the formation of hydrogen bonds between them. Interestingly, the composite films also exhibited reversible acidichromism. The as-prepared hybrid pigments in composite films could, therefore, serve simultaneously as a reinforced material and as a smart coloring agent for a polymer substrate.

天然花色苷的不良环境稳定性阻碍了其在各种功能应用中的实用性。本研究的目的是增强从枸杞提取的花色苷的环境稳定性。通过将其与蒙脱石混合以形成有机/无机杂化颜料，然后将杂化颜料掺入海藻酸钠中来合成可生物降解的异相可降解复合膜，并对其进行测试，以用于食品测试和包装中的潜在应用。X射线衍射，傅里叶变换红外光谱以及使用Brunauer-Emmett-Teller方法和zeta电位的结果表明，花色苷既吸附在表面上，又通过主客体相互作用嵌入蒙脱土的中间层，并且暴露于HCl和NH ₃后，获得的杂化颜料具有良好的，可逆的酸/碱行为气氛。包含杂化颜料的复合膜具有良好的机械性能，这是由于颜料在藻酸钠基质中的均匀分散以及它们之间氢键的形成。有趣的是，复合膜还表现出可逆的酸致变色。因此，复合膜中所制备的杂化颜料可以同时用作聚合物材料的增强材料和智能着色剂。