Research Article

Influence of the Branched Structure of Polyoxyethylene Units in Nonionic Surfactants on the Wettability of Anthracite: A Combined Modeling and Experimental Study

Figure 1

Chemical structure of surfactants, (a) C12(EO)20 and (b) Tween 20 (x + y + z + w = 20).
(a)
(b)