Continuous Nanoparticle Patterning Strategy in Layer‐Structured Nanocomposite Fibers
Continuous Nanoparticle Patterning Strategy in Layer‐Structured Nanocomposite Fibers
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DOI：
10.1002/adfm.202204731
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发表时间：
2022-06
影响因子：
19
通讯作者：
Weiheng Xu;Rahul Franklin;Dharneedar Ravichandran;Mohammed Bawareth;Sayli Jambhulkar;Yuxiang Zhu
中科院分区：
文献类型：
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作者：
Weiheng Xu;Rahul Franklin;Dharneedar Ravichandran;Mohammed Bawareth;Sayli Jambhulkar;Yuxiang Zhu
各向异性聚合物/纳米颗粒复合材料显示出独特的机械、热、电和光学性能，具体取决于组成元素的确认和配置控制。探索了气相沉积、冰模板、纳米粒子自组装、增材制造或逐层铸造等工艺来设计和控制具有所需各向异性或各向同性的纳米粒子微观结构。然而，由于细直径横截面和一维特征，在连续纤维纺丝过程中对纳米颗粒图案化的尝试有限。因此，本研究重点关注一种新的图案化技术，以在层状复合纤维中形成有序的纳米颗粒组件。因此，通过创新的工具设计、独特的材料组合以及纤维纺丝过程中精确的流变控制，可以保留不同的层。层倍增纳米粒子图案在一些材料系统中得到了证明，包括聚乙烯醇（PVA）-氮化硼（BN）/PVA、聚丙烯腈（PAN）-铝（Al）/PAN和PVA-BN/石墨烯纳米片（GNP）/PVA系统。这种方法展示了一种前所未有的纤维制造平台，可实现良好管理的层尺寸和纳米粒子操纵，具有定向热和电特性，可用于广泛的应用，包括结构支撑、热交换器、电导体、传感器、执行器和软机器人。
Anisotropic polymer/nanoparticle composites display unique mechanical, thermal, electrical, and optical properties depending on confirmation and configuration control of the composing elements. Processes, such as vapor deposition, ice‐templating, nanoparticle self‐assembly, additive manufacturing, or layer‐by‐layer casting, are explored to design and control nanoparticle microstructures with desired anisotropy or isotropy. However, limited attempts are made toward nanoparticle patterning during continuous fiber spinning due to the thin‐diameter cross section and 1D features. Thus, this research focuses on a new patterning technique to form ordered nanoparticle assembly in layered composite fibers. As a result, distinct layers can be retained with innovative tool design, unique material combinations, and precise rheology control during fiber spinning. The layer multiplying‐enabled nanoparticle patterning is demonstrated in a few material systems, including polyvinyl alcohol (PVA)–boron nitride (BN)/PVA, polyacrylonitrile (PAN)–aluminum (Al)/PAN, and PVA–BN/graphene nanoplatelet (GNP)/PVA systems. This approach demonstrates an unprecedentedly reported fiber manufacturing platform for well‐managed layer dimensions and nanoparticle manipulations with directional thermal and electrical properties that can be utilized in broad applications, including structural supports, heat exchangers, electrical conductors, sensors, actuators, and soft robotics.