%0 journal article
%@ 0376-7388
%A Gomes, D., Pereira Nunes, S., Peinemann, K.-V.

%D 2005
%J Journal of Membrane Science
%N 1
%P 13-25 
%R doi:10.1016/j.memsci.2004.05.015
%T Membranes for gas separation based on poly(1-trimethyl-1-propyne)-silica nanocomposites
%U https://doi.org/10.1016/j.memsci.2004.05.015
1 
%X butane permeability and butane/methane selectivity was significantly higher when compared to the nanocomposite membranes prepared by sol–gel process. The addition of fillers with 50% of surface modification with hydrophobic groups (Si–C8H17 and Si–C16H33) seems not to lead to a significant increase of the butane/methane selectivity and butane permeability when compared to the silica with hydrophilic surface groups, probably because of the unfavorable polymer/filler interaction, leading to an agglomeration of the long n-alkyl groups at the surfaceof the polymer. An increase of butane permeability up to six-fold of unfilled polymer was obtained.