The integration of advanced packaging technology with innovative multifunctional bio-based materials emerges as a promising next-generation strategy to tackle two enduring challenges in food storage technology: food spoilage and counterfeiting. Inspired by the superhydrophobic properties of swan feathers, this study developed a smart-responsive, sustainable food packaging film called C-CPQ using carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA). The as-prepared C-CPQ film exhibited remarkable hydrophobicity and water-vapor barrier properties owing to its novel design featuring an asymmetric bionic feather-like barbed texture, representing significant advancements in CMC/PVA-based packaging materials. Additionally, C-CPQ exhibited satisfactory mechanical strength, biodegradability, and film-forming capabilities. Notably, incorporating quercetin（QR） endowed C-CPQ with exceptional pH-sensing, fluorescence, antioxidant, UV-shielding, and antibacterial properties, enabling intelligent and active food packaging. Consequently, C-CPQ exhibited UV-stimulated photochromic characteristics and fatigue-resistant food anti-counterfeiting capabilities while extending food shelf life to 5 days, surpassing conventional PE packaging by 2 days. Moreover, the integration of smartphones enabled highly sensitive, rapid, and real-time visual monitoring of food degradation under natural light. The findings of this study present promising outcomes under real-world conditions, serving as a framework for the development of sustainable, high-performance modern food packaging with comprehensive real-time visual freshness monitoring, anti-counterfeiting, and preservation functionalities.

中文翻译：

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受天鹅羽毛启发的智能响应型可持续羧甲基纤维素/聚乙烯醇食品包装薄膜，用于稳健集成的智能和主动包装

先进包装技术与创新多功能生物基材料的集成成为一种有前景的下一代战略，可解决食品储存技术中的两个持久挑战：食品腐败和伪造。受天鹅羽毛超疏水特性的启发，这项研究使用羧甲基纤维素 (CMC) 和聚乙烯醇 (PVA) 开发了一种智能响应、可持续食品包装薄膜，称为 C-CPQ。所制备的C-CPQ薄膜由于其具有不对称仿生羽毛状倒刺纹理的新颖设计而表现出显着的疏水性和水蒸气阻隔性能，代表了基于CMC/PVA的包装材料的重大进步。此外，C-CPQ 还表现出令人满意的机械强度、生物降解性和成膜能力。值得注意的是，槲皮素（QR）的加入赋予C-CPQ优异的pH传感、荧光、抗氧化、紫外线屏蔽和抗菌性能，使食品包装智能化和活性化。因此，C-CPQ表现出紫外线刺激光致变色特性和抗疲劳食品防伪能力，同时将食品保质期延长至5天，比传统PE包装延长了2天。此外，智能手机的集成可以在自然光下对食品降解进行高度灵敏、快速和实时的视觉监测。这项研究的结果在现实条件下呈现出有希望的结果，作为开发可持续、高性能现代食品包装的框架，具有全面的实时视觉新鲜度监测、防伪和保存功能。