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Antibacterial [2-(Methacryloyloxy) ethyl] Trimethylammonium Chloride Functionalized Reduced Graphene Oxide/Poly(ethylene-co-vinyl alcohol) Multilayer Barrier Film for Food Packaging
Journal of Agricultural and Food Chemistry ( IF 6.1 ) Pub Date : 2018-01-10 00:00:00 , DOI: 10.1021/acs.jafc.7b04784
Hualin Wang 1 , Minmin Chen , Chongyang Jin , Baicheng Niu , Suwei Jiang , Xingjiang Li 1 , Shaotong Jiang 1
Affiliation  

The objective of present work was to construct antibacterial [2-(methacryloyloxy) ethyl] trimethylammonium chloride functionalized reduced graphene oxide/poly(ethylene-co-vinyl alcohol) (MTAC-rGO/EVOH) multilayer barrier films by using layer-by-layer assembly under a parallel electric field. Besides barrier and mechanical properties, the antibacterial activities of the film and cytotoxicity of MTAC-rGO nanosheets were extensively investigated. The functionalization of rGO was achieved by grafting MTAC onto a graphene framework through C (sp3)-C bonds. The assembly of MTAC-rGO on the EVOH matrix not only significantly improved film mechanical strength, but also endowed the targeting film with outstanding moisture barrier even under a relative humidity of 99% (e.g., 0.019 g m–2 s–1 atm–1 for (MTAC-rGO/EVOH)20) besides good oxygen barrier (e.g., 0.07 cm3 m–2 d–1 atm–1 for (MTAC-rGO/EVOH)20). Among the testing films, MTAC-rGO/EVOH film had the best antibacterial activity, and the activity against S. aureus was better than E. coli. Meanwhile, the cytotoxicity of MTAC-rGO nanosheets was very low. Results suggest that MTAC-rGO/EVOH film may have great potential in food active packaging.

中文翻译:

食品包装用抗菌[2-(甲基丙烯酰氧基)乙基]三甲基氯化铵官能化还原氧化石墨烯/聚(乙烯--乙烯醇)多层阻隔膜

本工作的目的是通过逐层构建抗菌[2-(甲基丙烯酰氧基)乙基]三甲基氯化铵官能化的氧化石墨烯/聚(乙烯--乙烯醇)(MTAC-rGO / EVOH)多层阻隔膜在平行电场下组装。除了阻隔和机械性能外,还广泛研究了膜的抗菌活性和MTAC-rGO纳米片的细胞毒性。rGO的功能化是通过C(sp 3)-C键将MTAC接枝到石墨烯骨架上而实现的。MTAC-rGO在EVOH基质上的组装不仅显着提高了膜的机械强度,而且即使在相对湿度为99%(例如0.019 gm)的情况下,也能使目标膜具有出色的防潮性能-2小号-1个大气压-1为(MTAC-RGO / EVOH)20)除了良好的氧气阻挡(例如,0.07厘米3-2 d -1个大气压-1为(MTAC-RGO / EVOH)20)。在测试薄膜中,MTAC-rGO / EVOH薄膜具有最佳的抗菌活性,并且对金黄色葡萄球菌的活性优于大肠杆菌。同时,MTAC-rGO纳米片的细胞毒性非常低。结果表明,MTAC-rGO / EVOH薄膜在食品活性包装中可能具有巨大潜力。
更新日期:2018-01-10
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