Van Gestel, Tim published the artcileSurface modification of γ-Al2O3/TiO2 multilayer membranes for applications in non-polar organic solvents, Formula: C9H20Cl2Si, the publication is Journal of Membrane Science (2003), 224(1-2), 3-10, database is CAplus.
This paper reports the surface modification of hydrophilic γ-Al2O3/anatase-TiO2 multilayer membranes by a silane coupling treatment, to obtain nanofiltration (NF) membranes applicable in non-polar solvents. Special care was given to optimization of the pore structure of the anatase top layer (microporous-mesoporous) and selection of the reaction medium (Et acetate) and silane coupling reagent ((CH3)2SiCl2, C1 silane; C8H17CH3SiCl2, C8 silane). Hexane and water permeability were studied before and after silane treatment as an indication of the effect of the modification. No hexane permeability was obtained before modification. For microporous membranes fired at 300°C, the internal pore structure remained hydrophilic upon silane treatment, as evidenced by the fact that the hexane permeability remained zero. On the contrary, the more open membrane structure with mesopores obtained by firing at temperatures higher than 400°C, could be modified by a silane coupling reaction at the internal pore structure. The ratio of permeability, hexane/water, was altered from 0/1 for a firing at 300°C and a C1 silane treatment to 1/0 for a firing at 500°C and a C8 silane treatment. Standard PEG-retention measurements in water showed that the membranes fired at 400 and 450°C and modified with a C8 and C1 silane, resp., have pore sizes corresponding to those of nanofiltration (NF) membranes. These membranes were characterized by a mol. weight cut-off (MWCO) of 410 and a hexane permeability of 3 L.h-1.m-2.bar-1 (400-C8) and a MWCO of 650 and a hexane permeability of 5 L.h-1.m-2.bar-1 (450-C1).
Journal of Membrane Science published new progress about 14799-93-0. 14799-93-0 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(methyl)(octyl)silane, and the molecular formula is C4H6BrFO2, Formula: C9H20Cl2Si.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics