Al-Antaki AHM, Luo X, Alharbi TMD, Harvey DP, Pye S, Zou J, Lawrance W, Raston CL. Inverted vortex fluidic exfoliation and scrolling of hexagonal-boron nitride.
RSC Adv 2019;
9:22074-22079. [PMID:
35518882 PMCID:
PMC9066649 DOI:
10.1039/c9ra03970h]
[Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 07/05/2019] [Indexed: 01/21/2023] Open
Abstract
Exfoliation or scrolling of hexagonal boron nitride (h-BN) occurs in a vortex fluidic device (VFD) operating under continuous flow, with a tilt angle of −45° relative to the horizontal position. This new VFD processing strategy is effective in avoiding the build-up of material that occurs when the device is operated using the conventional tilt angle of +45°, where the h-BN precursor and scrolls are centrifugally held against the wall of the tube. At a tilt angle of −45° the downward flow aided by gravity facilitates material exiting the tube with the exfoliation of h-BN and formation of h-BN scrolls then optimized by systematically varying the other VFD operating parameters, including flow rate and rotational speed, along with concentration of h-BN and the choice of solvent. Water was the most effective solvent, which enhances the green chemistry metrics of the processing.
Exfoliation or scrolling of h-BN occurs in a vortex fluidic device under downward continuous flow.![]()
Collapse