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Ultrastructural and antimicrobial impacts of allyl isothiocyanate incorporated in cellulose, β-cyclodextrin, and carbon nanotubes nanocomposites
Journal of Vinyl and Additive Technology ( IF 2.7 ) Pub Date : 2021-07-10 , DOI: 10.1002/vnl.21850
Clara Suprani Marques 1 , Marali Vilela Dias 2 , Nilda de Fátima Ferreira Soares 1 , Soraia Vilela Borges 2 , Isadora Rebouças Nolasco Oliveira 3 , Ana Clarissa dos Santos Pires 1 , Eber Antônio Alves Medeiros 1 , Eduardo Alves 4
Affiliation  

Antimicrobial nanobio packaging with controlled-release of active compounds is one of the most promising versions of active packaging. In this study, the antimicrobial effect of allyl isothiocyanate (AIT), complexed or not with β-cyclodextrin (βCD), and carbon nanotubes (CNTs) in cellulose films against Salmonella choleraesuis and Listeria innocua was investigated. Structural changes caused by AIT in bacteria were evaluated by transmission electron microscopy (TEM), as well as changes in the surface of the films, which were analyzed by atomic force microscopy and scanning electron microscopy. The active films inhibited the growth of both bacteria and caused damage to the cell membrane. The presence of inclusion complex and CNTs resulted in structural changes in films, such as the formation of lumps and reduction of roughness, respectively. Complexation of AIT with βCD and the use of CNTs increased the retention of the antimicrobial agent, which is desired to promote its controlled diffusion and consequently increase the preservative action of the film. However, when considering the use of βCD inclusion complexes, caution is necessary to prevent detrimental changes in the films' surface.

中文翻译:

异硫氰酸烯丙酯掺入纤维素、β-环糊精和碳纳米管纳米复合材料的超微结构和抗菌作用

具有活性化合物受控释放的抗菌纳米生物包装是最有前途的活性包装形式之一。在这项研究中,异硫氰酸烯丙酯 (AIT) 与 β-环糊精 (βCD) 和碳纳米管 (CNT) 复合或不复合,纤维素薄膜中的抗菌作用对猪霍乱沙门氏菌无害李斯特菌被调查。通过透射电子显微镜 (TEM) 评估 AIT 在细菌中引起的结构变化,以及通过原子力显微镜和扫描电子显微镜分析薄膜表面的变化。活性薄膜抑制了两种细菌的​​生长并对细胞膜造成损害。包合物和碳纳米管的存在分别导致薄膜的结构变化,例如团块的形成和粗糙度的降低。AIT 与 βCD 的络合和 CNT 的使用增加了抗菌剂的保留,这是促进其受控扩散并因此增加薄膜的防腐作用所需要的。然而,在考虑使用 βCD 包合物时,必须谨慎以防止薄膜表面的有害变化。
更新日期:2021-07-10
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