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Carrageenan-Based Antimicrobial Films Integrated with Sulfur-Coated Iron Oxide Nanoparticles (Fe3O4@SNP)
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2021-09-14 , DOI: 10.1021/acsapm.1c00690
Shahab Saedi 1 , Mastaneh Shokri 1 , Ruchir Priyadarshi 1 , Jong-Whan Rhim 1
Affiliation  

Recently, antibacterial nanocomposite films containing sulfur nanoparticles (SNPs) have been attracting attention in the food packaging field; however, due to the hydrophobic properties of SNPs, dispersion in hydrophilic biopolymers is nonuniform. Therefore, the functionality of SNPs is not fully utilized. For addressing this, sulfur-coated Fe3O4 hybrid nanoparticles (Fe3O4@SNP) with a core–shell structure were synthesized. Functional nanocomposite films of carrageenan were fabricated by integrating with Fe3O4, SNP, and Fe3O4@SNP nanoparticles, and their properties, including mechanical strength, UV–vis barrier, water vapor permeability (WVP), surface morphology, thermal stability, water contact angle (WCA), surface color, and antibacterial activity, were studied. The Fe3O4@SNP hybrid nanoparticles were dispersed uniformly in the carrageenan matrix. Fe3O4@SNP blocked UV light more effectively (T280 = 1.3 ± 0.2%) than SNP (T280 = 46.5 ± 0.0%). In addition, Fe3O4@SNP showed stronger antibacterial activity against Escherichia coli and Listeria monocytogenes than SNP. SNP showed 0.63 and 2.87 log CFU/g reduction of E. coli and L. monocytogenes, respectively, whereas Fe3O4@SNP exhibited 3.20 and 4.59 log CFU/g.

中文翻译:

角叉菜胶基抗菌薄膜与硫包覆氧化铁纳米颗粒 (Fe3O4@SNP) 结合

近年来,含硫纳米粒子(SNPs)的抗菌纳米复合薄膜在食品包装领域备受关注;然而,由于 SNP 的疏水特性,在亲水生物聚合物中的分散是不均匀的。因此,SNP 的功能没有得到充分利用。为了解决这个问题,合成了具有核壳结构的硫包覆的 Fe 3 O 4杂化纳米粒子(Fe 3 O 4 @SNP)。通过与Fe 3 O 4、SNP和Fe 3 O 4集成制备角叉菜胶功能性纳米复合膜研究了@SNP 纳米粒子及其特性,包括机械强度、紫外线-可见光阻隔、水蒸气渗透性 (WVP)、表面形态、热稳定性、水接触角 (WCA)、表面颜色和抗菌活性。Fe 3 O 4 @SNP 杂化纳米粒子均匀地分散在角叉菜胶基质中。Fe 3 O 4 @SNP比 SNP ( T 280 = 46.5 ± 0.0%)更有效地阻挡紫外线 ( T 280 = 1.3 ± 0.2 %)。此外,Fe 3 O 4 @SNP对大肠杆菌单核细胞增生李斯特菌表现出更强的抗菌活性比SNP。SNP 显示大肠杆菌单核细胞增生李斯特菌分别减少 0.63 和 2.87 log CFU/g ,而 Fe 3 O 4 @SNP 显示 3.20 和 4.59 log CFU/g。
更新日期:2021-10-08
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