Abstract Mechanical strength, transparency and flexibility are the leading bottlenecks for the application of a membrane. Thus, the development of co-effectively strong, transparent and flexible membranes is significant for various industries. Here, we fabricated the ANFs (aramid nanofibers)/BC (bacterial cellulose) nanocomposite membranes with different ANFs loadings (up to 8.0 wt%) via a facile and simple vacuum-assisted flocculation route. FT-IR, XRD and SEM were applied to characterize the pure BC membrane and ANFs/BC nanocomposite membranes. The resultant membranes maintained excellent transparency and flexibility at relatively low ANFs concentrations (≤4.0 wt%). The mechanical properties of ANFs/BC nanocomposite membranes could be altered by changing the ANFs content, in which the ANFs served as an enforcement agent, and the nanocomposite membrane exhibited the highest tensile strength at ANFs content of 4.0 wt%. Besides the excellent tensile strength, transparency and flexibility, the surface wettability of the ANFs/BC decreased compared to that of pristine BC, indicating a relative stability in humidity. These results showed that the ANFs/BC nanocomposite membrane is strong, transparent and flexible, thus making it an excellent candidate for electronic substrates and optical materials.

中文翻译：

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轻松简单地制造坚固、透明和柔韧的芳纶纳米纤维/细菌纤维素纳米复合膜

摘要 机械强度、透明度和柔韧性是膜应用的主要瓶颈。因此，共同有效地开发坚固、透明和柔性的膜对各个行业都具有重要意义。在这里，我们通过简便的真空辅助絮凝路线制造了具有不同 ANFs 负载量（高达 8.0 wt%）的 ANFs（芳纶纳米纤维）/BC（细菌纤维素）纳米复合膜。FT-IR、XRD 和 SEM 用于表征纯 BC 膜和 ANFs/BC 纳米复合膜。所得膜在相对较低的 ANF 浓度（≤4.0 wt%）下仍保持优异的透明度和柔韧性。ANFs/BC 纳米复合膜的机械性能可以通过改变 ANFs 的含量来改变，其中 ANFs 作为强制剂，纳米复合膜在 ANFs 含量为 4.0 wt% 时表现出最高的拉伸强度。除了优异的拉伸强度、透明度和柔韧性外，ANFs/BC 的表面润湿性与原始 BC 相比有所降低，表明在湿度下相对稳定。这些结果表明，ANFs/BC 纳米复合膜强度高、透明且柔韧，因此成为电子基板和光学材料的绝佳候选材料。