Wang Yu-Zhou, Chen Tian, Liu Hai-Hui, Wang Xue-Chen, Zhang Xing-Xiang
Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
J Nanosci Nanotechnol. 2019 Apr 1;19(4):2078-2086. doi: 10.1166/jnn.2019.15805.
Graphene has attracted a great number of attentions due to the excellent physical and chemical properties. For the convenience of investigations and applications, it is crucial to produce the grapheme with high-quality and high-yield by an easy-obtained method. In this research, a promising method is demonstrated to produce a high-concentration few-layer graphene (FLG) dispersion by direct microfluidization in water/surfactant systems. The effects of surfactant selection, chamber pressure and microfluidization cycles on the graphitic material exfoliation efficiency are systematically studied. The FLG concentration and the quality of the as-prepared FLG were determined by a series of characterizations. The graphene dispersions, with an average lateral size of 0.6 m and a few-layer structure, were stabilized by surfactants at a high concentration of up to 1.7 mg/mL and exhibited a relatively high quality (/ = 0.07-0.56, C/O ~ 19.36) within a processing time of a few hours. This method should facilitate the mass production of high-quality graphene by liquid-phase exfoliation and promote the industrial application of graphene.
由于具有优异的物理和化学性质，石墨烯已吸引了大量关注。为便于研究和应用，通过一种易于实现的方法高质量、高产量地制备石墨烯至关重要。在本研究中，展示了一种有前景的方法，即在水/表面活性剂体系中通过直接微流化制备高浓度少层石墨烯（FLG）分散液。系统研究了表面活性剂选择、腔室压力和微流化循环次数对石墨材料剥离效率的影响。通过一系列表征确定了所制备的FLG的浓度和质量。所制备的石墨烯分散液平均横向尺寸为0.6μm且具有少层结构，在几小时的处理时间内，通过表面活性剂稳定在高达1.7mg/mL的高浓度，并且表现出相对较高的质量（I/D = 0.07 - 0.56，C/O ~ 19.36）。该方法应有助于通过液相剥离大规模制备高质量石墨烯，并推动石墨烯的工业应用。
