Nano Research ( IF 9.5 ) Pub Date : 2023-10-13 , DOI: 10.1007/s12274-023-6123-y
Zhidong Nie , Yingzhi Sun , Tianxu Zhou , Shengwen Kong , Linxing Liu , Chuangqi Zhao , Mingjie Liu
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One-dimensional (1D) aramid nanofiber (ANF) based nanocomposite films have drawn increasing attentions in various applications due to their excellent mechanical properties and impressive chemical and thermal stabilities. However, the large-area fabrication of aramid nanocomposite films with ultrastrong mechanical properties under mild conditions remains a great challenge. Here we present a facile superspreading-assisted strategy to produce aramid nanofiber based oriented layered nanocomposites using phase inversion process that occurs at the fully swollen hydrogel surfaces. The nanocomposite films based on ANF, carboxylation carbon tube (CNT–COOH), poly(vinyl alcohol) (PVA), and MXene nanosheet exhibit a tensile strength of up to 870.8 ± 85 MPa, a Young’s modulus of 21.8 ± 2.2 GPa, and outstanding toughness (up to 43.2 ± 4.6 MJ/m3), which are much better than those conventional aramid nanofiber based materials. Electrical conductivity of our nanocomposite films reaches the maximum of about 1100 S/m. The fabulous mechanical properties combination and continuous production capability render our strategy representing a promising direction for the development of high-performance nanocomposites.
中文翻译:
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大面积超强刚性芳纶纳米纤维基层状纳米复合材料薄膜
一维(1D)芳纶纳米纤维(ANF)基纳米复合薄膜由于其优异的机械性能和令人印象深刻的化学和热稳定性而在各种应用中引起了越来越多的关注。然而,在温和条件下大面积制备具有超强机械性能的芳纶纳米复合薄膜仍然是一个巨大的挑战。在这里,我们提出了一种简单的超级铺展辅助策略,利用发生在完全膨胀的水凝胶表面的相转化过程来生产基于芳纶纳米纤维的取向层状纳米复合材料。基于ANF、羧化碳管(CNT –COOH)、聚乙烯醇(PVA)和MXene纳米片的纳米复合薄膜表现出高达870.8±85MPa的拉伸强度、21.8±2.2GPa的杨氏模量和优异的韧性(高达43.2±4.6MJ/m 3),远优于传统的芳纶纳米纤维基材料。我们的纳米复合薄膜的电导率最高可达约1100 S/m。出色的机械性能组合和连续生产能力使我们的策略代表了高性能纳米复合材料开发的一个有前途的方向。