Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, PR China.
College of Life Sciences, Chongqing Normal University, Shapingba District, Chongqing 401331, PR China.
Int J Biol Macromol. 2020 Oct 1;160:175-182. doi: 10.1016/j.ijbiomac.2020.05.201. Epub 2020 May 26.
Carboxymethylcellulose (CMC)-based film packaging enriched with plant-sourced cinnamaldehyde (CIN) and zinc oxide nanoparticles (ZnONPs) of simple synthesis were prepared in this work. Then, the physico-mechanical and barrier properties and antifungal activities of CMC-based films, including pristine CMC, CIN/CMC, ZnONPs/CMC, ZnONPs/CIN/CMC were investigated. The results indicated that the ZnONPs incorporation produced a nanocomposite film with low transparency, good flexibility and high mechanical resistance. Furthermore, the water barrier capacity and antifungal performance of CMC-based films were significantly improved with the addition of CIN. CMC-based composite film incorporating with both CIN and ZnONPs, in turn, exhibited satisfactory mechanical characterizations, excellent barrier capacities against water and oxygen molecules and anti-Aspergillus niger activity. Moreover, ZnO/CIN/CMC nanocomposite film was significantly effective at inhibiting the weight loss and firmness of cherry tomatoes and in decreasing the total acidity content of these fruits after storage. Our results suggested that the ZnO/CIN/CMC nanocomposite film packaging can improve the cherry tomatoes quality by suppressing physiological the metabolic activities of the fruits during postharvest storage period.
本工作制备了一种基于羧甲基纤维素（CMC）的薄膜包装，其中富含植物源肉桂醛（CIN）和氧化锌纳米粒子（ZnONPs），其合成方法简单。然后，研究了包括原始 CMC、CIN/CMC、ZnONPs/CMC 和 ZnONPs/CIN/CMC 在内的基于 CMC 的薄膜的物理力学和阻隔性能以及抗真菌活性。结果表明，ZnONPs 的掺入产生了一种纳米复合材料薄膜，其透明度低、柔韧性好、机械阻力高。此外，CIN 的添加显著提高了 CMC 基薄膜的水阻隔能力和抗真菌性能。相反，同时包含 CIN 和 ZnONPs 的 CMC 基复合膜表现出令人满意的机械特性、对水和氧气分子的优异阻隔能力以及对黑曲霉的活性。此外，ZnO/CIN/CMC 纳米复合膜在抑制樱桃番茄失重和硬度以及降低这些果实贮藏后总酸度方面非常有效。我们的结果表明，ZnO/CIN/CMC 纳米复合膜包装可以通过抑制果实采后贮藏期间的生理代谢活动来提高樱桃番茄的品质。
