Qiu Shuilai, Ren Xiyun, Zhou Xia, Zhang Tao, Song Lei, Hu Yuan
State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, P. R. China.
ACS Appl Mater Interfaces. 2020 Aug 12;12(32):36639-36651. doi: 10.1021/acsami.0c09685. Epub 2020 Jul 28.
Natural nacre offers an optimized guiding principle for the assembly of lightweight and high-strength nanocomposites with excellent mechanical properties. Inspired by the "brick-and-mortar" layered structure of natural nacre, we present a cohort of bioinspired nanocomposites consisting of nanofibrillar cellulose (NFC) and few-layer hydroxyl functionalized black phosphorus (BP-OH) via a vacuum-assisted filtration self-assembly procedure. Owing to the well dispersed two-dimensional (2D) BP-OH in one-dimensional (1D) NFC and strong interfacial hydrogen bonding between them, these novel nacre-like BP-OH/NFC composite films show excellent mechanical performance with tensile strength up to 214.0 MPa, 300% increase compared to pure NFC and tensile fracture strain up to 23.8%, 1.8 times higher than that of pure NFC. Moreover, these nacre-like composite films bare good fire resistance and high thermal stability. This nacre-inspired approach demonstrates a promising strategy for designing high-performance BP-OH/NFC composite film, and the obtained bioinspired material could be a potential candidate in the application of flexible construction materials and flame retarded insulation materials.
天然珍珠层为组装具有优异机械性能的轻质高强度纳米复合材料提供了一种优化的指导原则。受天然珍珠层“砖-泥”层状结构的启发，我们通过真空辅助过滤自组装程序，制备了一组由纳米纤维状纤维素（NFC）和少层羟基功能化黑磷（BP-OH）组成的仿生纳米复合材料。由于二维（2D）BP-OH在一维（1D）NFC中分散良好，且它们之间存在强界面氢键，这些新型类珍珠层BP-OH/NFC复合薄膜表现出优异的机械性能，拉伸强度高达214.0 MPa，比纯NFC提高了300%，拉伸断裂应变高达23.8%，比纯NFC高1.8倍。此外，这些类珍珠层复合薄膜具有良好的耐火性和高热稳定性。这种受珍珠层启发的方法为设计高性能BP-OH/NFC复合薄膜展示了一种有前景的策略，所获得的仿生材料可能是柔性建筑材料和阻燃绝缘材料应用中的潜在候选材料。
