Table 2.

Permeability of different liquids passing through the CNT membranes^a

	This research	CNT/epoxy [25]	CNT/polystyrene [21]	MWNT/polystyrene [27]	Polycarbonate membrane [2]	CNT/Si3N4 [2]
Pore size (nm)	10	10	7	7	15	1.3–2.0
Length (μm)	120	4000	34~126	3~70	6	2~3
Water permeability	3.23	3.9	0.78	0.59~1.02	~6 × 10−3	(1.2~4.6) × 10−1
Ethanol permeability	0.507	6.3 × 10−4	0.35	0.35
Hexane permeability	1.00	9.3	0.45	0.44
Kerosene permeability	0.10

^aPermeability at 1 atm is in the units of ml min⁻¹ cm⁻²