Inorganic–organic hybrid films containing two-dimensional nanosheets have shown good gas barrier performance, but moderate tensile property, because of the rigid characteristics of covalent or ionic bonds between the assembly units. In this work, we used LDH nanosheets rich in hydroxyl groups as building units, followed by modification of tannic acid (TA), to assemble with polyethylene oxide (PEO) through hydrogen bonds. Compared with previous work, the tensile property and oxygen barrier performance of (TA@LDH/PEO)_n films have been significantly improved. A 50-bilayer TA@LDH/PEO film, deposited on a 1 mm thick natural rubber substrate, results in a 29× reduction (contrast with bare substrate) in oxygen transmission rate and maintains its good barrier property even under a large elongation of 120%. The excellent tensile and gas barrier properties are attributed to the ductility of hydrogen bond network among building blocks and the significant prolongation of oxygen transmission path induced by LDH nanosheets.

中文翻译：

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通过纳米砖多层的氢键自组装实现的可拉伸阻气膜

由于组装单元之间的共价键或离子键的刚性特性，含有二维纳米片的无机-有机杂化薄膜表现出良好的气体阻隔性能，但具有适度的拉伸性能。在这项工作中，我们使用富含羟基的 LDH 纳米片作为构建单元，然后对单宁酸 (TA) 进行改性，通过氢键与聚环氧乙烷 (PEO) 组装。(TA@LDH/PEO) _n的拉伸性能和氧阻隔性能与之前的工作相比电影有了明显的改善。50 双层 TA@LDH/PEO 薄膜沉积在 1 mm 厚的天然橡胶基材上，导致氧气透过率降低 29 倍（与裸基材相比），即使在 120 的大伸长率下也保持其良好的阻隔性%。优异的拉伸和气体阻隔性能归因于构建块之间氢键网络的延展性以及由 LDH 纳米片诱导的氧传输路径的显着延长。