Nanoscale homogeneity of silica-poly(vinyl alcohol) membranes by controlled cross-linking via sol-gel reaction in acidified and hydrated ethanol

作者：Chaudhri Sanjay G; Rajai Bhavika H; Singh Puyam S^*

来源：RSC Advances, 2015, 5(81): 65862-65869.

DOI：10.1039/c5ra12030f

Organic-inorganic hybrid membranes in which nanoscale hybrid domains create preferential pathways for selective permeation exhibit excellent performance in separation processes. Herein, a sol-gel reaction synthesis route in acidified and hydrated ethanol to prepare a silica-poly(vinyl alcohol) hybrid membrane of nanoscale homogeneity is reported. A Si-29 NMR study was performed on the membrane samples to probe the connectivity of SiO4 tetrahedra in the cross-linking hybrid networks while the small-angle scattering study revealed the nanostructure of the silica-polymer hybrid. TEM, DSC, IR, TGA, XRD and swelling studies were performed to study other physico-chemical properties of the membrane. The hybrid membrane exhibited superior water permeability (96 L m(-2) h(-1) mu m) to other reported membranes in the pervaporation desalination of saline water of 2000 ppm NaCl.

• 出版日期2015
• 单位海洋化工研究院有限公司