Microfluidic‐Assisted Self‐Assembly of 2D Nanosheets toward in situ Generation of Robust Nanofiber Film

Abstract

Methods allow the enhancement of nanofibers via self‐assembly are potentially important for new disciplines with many advantages, including multi‐anchor interaction, intrinsic mechanical properties and versatility. Herein, a microfluidic‐assisted self‐assembly process to construct hydroxyl functionalized boron nitride nanosheets (OH−BNNS)/graphene oxide (GO)/thermoplastic polyurethane (TPU) composite nanofiber film, in which stable and precisely controlled self‐assembly is fulfilled by the confined ultra‐small‐volume chip is demonstrated. Multiple fine structural analyses alongside with the density‐functional theory (DFT) calculations are implemented to confirm the synergistic effect of noncovalent interactions (hydrogen bonding interaction, π – π stacking interaction, and van der Waals attraction) plays a critical role in the robust micro‐structure and a massive 700% enhancement of mechanical strength via adding only 0.3 wt% OH−BNNS and GO. Importantly, profiled from broadband optical absorption ability, robust mechanical properties and outstanding flexibility, the self‐assembled 3D OH−BNNS/GO/TPU nanofiber film reveals an adorable evaporation rate of 4.04 kg m−2 h−1 under one sun illumination with stable energy transfer efficiency (93.2%) by accompanying hydrogen bonding interaction. This microfluidic‐assisted self‐assembly strategy will provide a constructive entry point for the rational design of nanofibers and beyond.

Borocarbonitride‐Based Emerging Materials for Supercapacitor Applications: Recent Advances, Challenges, and Future Perspectives

“…This method facilitates generating a wide range of arrays and patterns with exceptional efficiency and scalability. [157,158] Chen et al constructed a flexible supercapacitor based on BCN using this approach and MES technology, as shown in Figure 21a. Here, solutions containing ABCNs/N, N-dimethylformamide (DMF), and polyacrylonitrile were injected into microfluidic chips and subjected to carbonization.…”

Covalently cross-linked ultrastrong SiO2-loaded polyvinyl alcohol fibers via microfluidic spinning

“…24–26 In this case, not only the nanocomposite fibers are available via the in situ spinning chemistry process, but also the mechanical properties are reinforced due to the hydrogen bonding interactions. 27–29 In spite of a few attempts, the exploration of mechanically strong fibers by microfluidic spinning, especially by fiber spinning chemistry, is still in its infancy. Besides, a nanocomposite fiber based on covalent interactions via microfluidic spinning remains unavailable yet.…”

Microfluidic Spinning of Metal–Organic Framework-Loaded Nanofibers toward High-Efficient Particulate Matter Removal and Antibacterial Filters

“…The microfluidic-electrospinning technique offers a versatile and controllable pathway toward functional nanofibers. , Especially, the microfluidic chip enables a controllable assembly of multicomponent materials, thus favoring the generation of structure- and function-controlled nanofibers. , Besides, the precise control of the flow rate also leads to the formation of ultrafine nanofibers. In our premise, zeolite imidazole framework-8 (ZIF-8) can significantly improve the PM adsorption efficiency due to its serrated pore structure, large-enough surface, plentiful active sites, and electrostatic interaction .…”