Multifunctionality through Embedding Patterned Nanostructures in High‐Performance Composites
Multifunctionality through Embedding Patterned Nanostructures in High‐Performance Composites
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通过在高性能复合材料中嵌入图案化纳米结构实现多功能性
DOI：
10.1002/adma.202300948
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发表时间：
2023
影响因子：
29.4
通讯作者：
Asadi, Amir
中科院分区：
文献类型：
--
作者：
Kaynan, Ozge;Hosseini, Ehsan;Zakertabrizi, Mohammad;Motta De Castro, Emile;Pérez, Lisa M.;Jarrahbashi, Dorrin;Asadi, Amir
尽管碳纤维复合材料是工业中高性能材料的支柱，但由于缺乏控制纳米级相互作用的实用自下而上的方法，制造具有同时增强的多功能性和结构特性的碳纤维复合材料仍然难以捉摸。本文以液滴内部电流和纳米材料的两亲性为导向，引入了一种可编程的喷涂方法，用于在复合材料中沉积具有可定制图案的多种纳米材料。研究表明，这些图案调节复合材料的界面形成、损伤抑制和导电导热性。这在主要依赖于掺入纳米材料以实现特定功能的常规制造中是不存在的。分子动力学模拟表明，增加的杂化纳米材料的亲水性，这是同步从盘到环的转移模式，提高了碳表面和环氧树脂之间的界面处的相互作用，表现在增强层间和弯曲性能。从环到盘的转变产生了更大的互连网络，从而改善了热和电性能，而没有机械性能的损失。这种新颖的方法引入了一种新的设计，其中机械和多功能性能由沉积图案的形状控制，从而消除了在当今分层复合材料制造中被认为是矛盾的性能之间的权衡。
Despite being a pillar of high‐performance materials in industry, manufacturing carbon fiber composites with simultaneously enhanced multifunctionality and structural properties has remained elusive due to the lack of practical bottom‐up approaches with control over nanoscale interactions. Guided by the droplet's internal currents and amphiphilicity of nanomaterials, herein, a programmable spray coating is introduced for the deposition of multiple nanomaterials with tailorable patterns in composite. It is shown that such patterns regulate the formation of interfaces, damage containment, and electrical‐thermal conductivity of the composites, which is absent in conventional manufacturing that primarily rely on incorporating nanomaterials to achieve specific functionalities. Molecular dynamics simulations show that increasing the hydrophilicity of the hybrid nanomaterials, which is synchronous with shifting patterns from disk to ring, improves the interactions between the carbon surfaces and epoxy at the interfaces,manifested in enhanced interlaminar and flexural performance. Transitioning from ring to disk creates a larger interconnected network leading to improved thermal and electrical properties without penalty in mechanical properties. This novel approach introduces a new design , where the mechanical and multifunctional performance is controlled by the shape of the deposited patterns, thus eliminating the trade‐off between properties that are considered paradoxical in today's manufacturing of hierarchical composites.