Low-temperature CVI modification of γ-alumina membranes

PDMS grafting of mesoporous γ-alumina membranes for nanofiltration of organic solvents

“…Flat α-Al 2 O 3 supported γ-Al 2 O 3 membranes with a diameter of 39 mm were purchased from Pervatech. The mean pore diameter of the 3 mm thick γ-Al 2 O 3 layer and the 1.7 mm thick α-Al 2 O 3 support were 5 nm and 80 nm, respectively [20,21].…”

Solvent permeation behavior of PDMS grafted γ-alumina membranes

“…All membranes were in the form of flat discs with a diameter of 20 mm and a total thickness of 2.5 mm. The first series of membranes (M1) consisted of a mesoporous γ-Al 2 O 3 layer with a pore diameter of 5 nm and 3 μm thickness, supported on macroporous α-Al 2 O 3 supports [23,24]. The second series (M2) consisted of macroporous α-Al 2 O 3 supports, coated with a 3 μm thick mesoporous (5 nm) γ-Al 2 O 3 layer, which is modified with 3-aminopropyltriethoxysilane followed by mono(2,3-epoxy)polyetherterminated polydimethylsiloxane (n¼ 10).…”

Gas Permeation Properties of Amorphous SiC Membranes Synthesized from Polycarbosilane without Oxygen-Curing Process

“…Amorphous silica membrane is well known as a H 2 -permselective membrane. Amorphous silica membranes are produced by sol-gel coating, 4,5 chemical vapor deposition and chemical vapor infiltration CVDCVI, [6][7][8][9][10][11][12][13] and pyrolysis of precursor polymers.…”