Double alkoxysilanes cross-link with PVA to prepare optimized membranes.

The border="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">NH₂ group can enhance membrane homogeneity, thermal stability and flexibility.

Single border="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">Si(OCH₃) group produces large silica particles and reduces membrane stability and selectivity.

Combination of border="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">Si(OCH₃) and border="0" alt="single bond" data-inlimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">Si(OC₂H₅) groups can obtain high stability and balance permeability and selectivity.