Type

Journal Article

Authors

Jonathan Coleman

Subjects

Engineering

Topics
mixing shear rate large scale materials exfoliation layered materials production graphenescale upshear mixertmd sws2

Exfoliation of 2D materials by high shear mixing (2019)

Abstract While it has been demonstrated that large scale liquid exfoliation of graphene is possible using high-shear exfoliation, it has not yet been shown to be applicable to a broader range of layered materials. In addition, it would be useful to determine whether the mechanisms reported for shear exfoliation of graphene also apply to other 2D materials. In this work we show that previous models describing high-shear exfoliation of graphene apply to MoS2 and WS2. However, we find the minimum shear rate required to exfoliate MoS2 and WS2 to be ?3 ? 104 s-1, somewhat higher than the value for graphene. We also demonstrate the scalability of shear exfoliation of WS2. By measuring and then optimising the scaling parameters, shear exfoliation of WS2 is shown to be capable of reaching concentrations of 1.82 g l-1 in 6 h and demonstrating a maximum production rate of 0.95 g h-1.
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Full list of authors on original publication

Jonathan Coleman

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Jonathan Coleman
Trinity College Dublin
Total Publications: 217