Al-Antaki Ahmed Hussein Mohammed, Luo Xuan, Alharbi Thaar M D, Harvey David P, Pye Scott, Zou Jin, Lawrance Warren, Raston Colin L
Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University Adelaide SA 5042 Australia
Department of Chemistry, Faculty of Sciences, Kufa University Kufa Najaf Iraq.
RSC Adv. 2019 Jul 16;9(38):22074-22079. doi: 10.1039/c9ra03970h. eCollection 2019 Jul 11.
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.
在连续流动的涡旋流体装置（VFD）中，六方氮化硼（h-BN）会发生剥落或卷曲，该装置相对于水平位置的倾斜角度为-45°。这种新的VFD处理策略有效地避免了使用传统的+45°倾斜角度操作装置时出现的材料堆积问题，在传统角度下，h-BN前驱体和卷曲物会被离心作用固定在管壁上。在-45°的倾斜角度下，重力辅助的向下流动有助于材料随着h-BN的剥落离开管子，然后通过系统地改变其他VFD操作参数（包括流速、转速）以及h-BN的浓度和溶剂的选择来优化h-BN卷曲物的形成。水是最有效的溶剂，这提高了该处理过程的绿色化学指标。
