Therefore, the idea of dispersing CNTs into polymer matrix to fabricate MMMs has stimulated significant interest among researchers, and considerable efforts have focused on the preparation of highly permselective membranes consist of CNTs embedded into a polymer matrix that could be easily scaled up to large area membranes. Kim et al. fabricated MMMs containing SWNTs into a poly (imide siloxane) matrix [19]. Their experimental results indicated that with increasing the amount of SWNTs in the polymer matrix, O2, N2 and CH4 permeabilities increased.