Effect of Tannic Acid and Cellulose Nanocrystals on Antioxidant and Antimicrobial Properties of Gelatin Films,ACS Sustainable Chemistry & Engineering

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Effect of Tannic Acid and Cellulose Nanocrystals on Antioxidant and Antimicrobial Properties of Gelatin Films
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-06-16 , DOI: 10.1021/acssuschemeng.1c01774
Liliane Samara Ferreira Leite _{1,

2,

3} , Cynthia Pham ₄ , Stanley Bilatto ₂ , Henriette M.C. Azeredo _{2,

5} , Emily D. Cranston ₄ , Francys Kley Moreira ₆ , Luiz Henrique C. Mattoso ₂ , Julien Bras _{3,

7}

Affiliation

This work explored gelatin films incorporated with cellulose nanocrystals (CNC) and tannic acid as bio-based multifunctional food packaging materials. The effects of nonoxidized tannic acid (nTA), oxidized tannic acid (OTA), and CNC on the physical, antioxidant, and antimicrobial properties of gelatin films were investigated. Rheological and ultraviolet (UV)–visible measurements showed that gelatin films with nTA and CNC presented a lower chemical cross-linking and more noncovalent intermolecular interactions in comparison with those containing OTA. When compared to the film containing only nTA, the one with nTA and CNC presented substantial increases in the antioxidant capacity (52%), UV barrier (76%), tensile strength (79%), and water vapor barrier (67%) properties of gelatin. This evidence suggested that noncovalent interactions from nTA molecules and CNC play an important role in the modification of gelatin. The gelatin films designed with nTA and CNC also exhibited antimicrobial effects against Staphylococcus aureus and Escherichia coli. Overall, the incorporation of CNC and nTA as active components to gelatin films is a suitable approach for producing sustainable, multifunctional materials for food packaging and other applications.

中文翻译：

单宁酸和纤维素纳米晶对明胶薄膜抗氧化和抗菌性能的影响

这项工作探索了与纤维素纳米晶体 (CNC) 和单宁酸结合的明胶薄膜作为生物基多功能食品包装材料。研究了非氧化单宁酸 (nTA)、氧化单宁酸 (OTA) 和 CNC 对明胶薄膜的物理、抗氧化和抗菌性能的影响。流变学和紫外 (UV) 可见光测量表明，与含有 OTA 的明胶薄膜相比，含有 nTA 和 CNC 的明胶薄膜具有更低的化学交联和更多的非共价分子间相互作用。与仅含有 nTA 的薄膜相比，含有 nTA 和 CNC 的薄膜在抗氧化能力 (52%)、紫外线阻隔 (76%)、拉伸强度 (79%) 和水蒸气阻隔 (67%) 性能方面都有显着提高明胶。这一证据表明，nTA 分子和 CNC 的非共价相互作用在明胶的修饰中起着重要作用。用 nTA 和 CNC 设计的明胶薄膜也表现出对金黄色葡萄球菌和大肠杆菌。总的来说，将 CNC 和 nTA 作为活性成分加入明胶薄膜是生产用于食品包装和其他应用的可持续多功能材料的合适方法。

更新日期：2021-06-28

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