The current study explores the formation of active eco-friendly materials capable of preventing microbial contamination using in situ ultrasonic grafting of vanillin, curcumin and a curcumin-vanillin mixture on the surfaces of carboxymethylcellulose (CMC) and chitosan films. Spectroscopic, microscopic, physical and mechanical studies revealed that the films grafted with curcumin-vanillin mixture demonstrate improved mechanical properties and higher degree of order. The bioactivity of the prepared films was tested on food model, fresh-cut melons and films with a deposited curcumin-vanillin mixture showed superior antibacterial properties. For instance, this mixture-grafted on CMC films demonstrated a total inhibition of yeast/mold proliferation during 12 days. The HR-SEM studies of the mixture-grafted films revealed the presence of crystalline structures. Cooperative crystallization effect between the curcumin (the crystal maker) and the volatile vanillin is suggested to be responsible for the observed effects. According to our knowledge, this is the first usage of co-crystallization method in surface deposition. The results point out to a general strategy of combining a crystal maker agent with a volatile active agent during in situ sonochemical deposition to form bioactive materials that can be further used for food packaging, agriculture, pharmacology and more.

中文翻译：

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合作结晶作用在基于多糖的声化学接枝活性材料的形成中。

当前的研究探索了通过在羧甲基纤维素（CMC）和壳聚糖膜表面上原位超声接枝香兰素，姜黄素和姜黄素-香兰素混合物来防止微生物污染的活性环保材料的形成。光谱，微观，物理和机械研究表明，用姜黄素-香兰素混合物接枝的薄膜表现出改善的机械性能和更高的有序度。在食品模型，新鲜切瓜，具有姜黄素-香兰素混合物沉积的薄膜上测试了制备的薄膜的生物活性。例如，这种在CMC膜上接枝的混合物在12天内显示出对酵母/霉菌增殖的完全抑制。混合物接枝薄膜的HR-SEM研究表明存在晶体结构。姜黄素（晶体制造者）和挥发性香兰素之间的协同结晶作用被认为是所观察到的作用的原因。据我们所知，这是在表面沉积中首次使用共结晶法。该结果指出了在原位声化学沉积过程中将晶体制造剂与挥发性活性剂结合以形成可进一步用于食品包装，农业，药理学等的生物活性材料的一般策略。这是共结晶法在表面沉积中的首次使用。该结果指出了在原位声化学沉积过程中将晶体制造剂与挥发性活性剂结合以形成可进一步用于食品包装，农业，药理学等的生物活性材料的一般策略。这是共结晶法在表面沉积中的首次使用。该结果指出了在原位声化学沉积过程中将晶体制造剂与挥发性活性剂结合以形成可进一步用于食品包装，农业，药理学等的生物活性材料的一般策略。