The ultrasonic liquid phase exfoliation method has emerged as an essential research direction for graphene preparation due to its cost-effectiveness and ability to minimize defects. However, this method faces challenges related to processing throughput when scaled up for industrial production. In this study, industrial grade ultrasonic homogenizers with different frequencies and probe types were evaluated for the preparation of FLG. In each experiment, 1.5 kg of graphite slurry was treated using a cyclic ultrasonic system. The results demonstrated that the 25 kHz dumbbell probe produced the thinnest FLG with the lowest defect density. Moreover, applying a static pressure of 0.2 MPa in the cycle system enhanced the cavitation-induced exfoliation of graphite sheets, effectively reducing the layer count and distribution range of FLG. This method improves the conductivity while minimizing defect density.

中文翻译：

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超声探头类型、频率和静压对大规模石墨烯剥离的影响


超声液相剥离法因其成本效益和最小化缺陷的能力而成为石墨烯制备的重要研究方向。然而，当扩大规模进行工业生产时，这种方法面临着与加工通量相关的挑战。在本研究中，评估了具有不同频率和探针类型的工业级超声均质器用于制备 FLG。在每个实验中，使用循环超声系统处理 1.5 kg 石墨浆料。结果表明，25 kHz 哑铃探针产生了最薄的 FLG，缺陷密度最低。此外，在循环系统中施加 0.2 MPa 的静压增强了空化诱导的石墨片剥离，有效减少了 FLG 的层数和分布范围。这种方法提高了电导率，同时最大限度地减少了缺陷密度。