SANS

Abstract(#br)We report characterization of polydimethylsiloxane (PDMS) pervaporation membranes prepared from various conditions using the small-angle neutron scattering (SANS). The PDMS membranes were prepared by cross-linking reactions between hydroxyl terminated polydimethylsiloxane (HPDMS) and polymethylhydrosiloxane with pendant hydride (PHMS). The radius of gyration ( R g ) of HPDMS and PHMS polymer chains determined from the SANS data analysis is found to be similar with the size of about 12\u003cce:hsp sp=\"0.25\"/\u003eÅ.

Abstract(#br)Preparation of a high flux poly(dimethylsiloxane) (PDMS) membrane for separation of organics from water by pervaporation has been a challenging task. For this, the membrane should be as thin as possible since the productivity flux is inversely proportional to the membrane thickness. In an attempt to understand the relationship between the membrane structure and flux, the membranes of different thickness varying from about 0.2 to 150\u003cce:hsp sp=\"0.25\"/\u003eμm were prepared and studied.