Tuning the performance of polypyrrole-based solvent-resistant composite nanofiltration membranes by optimizing polymerization conditions and incorporating graphene oxide

摘要: Abstract Solvent-resistant nanofiltration (SRNF) is considered an emerging process capable of replacing conventional energy-consuming methods separating organic mixtures in diverse industrial fields. This study optimized the performance polypyrrole (PPy) composite SRNF membranes by varying polymerization conditions, including types and concentrations oxidants pyrrole concentrations, forming integral selective layers on hydrolyzed polyacrylonitrile (PAN-H) support with better separation properties. The PAN-H was partially as indicated FTIR spectrum compatible PPy layer, demonstrated apparent lack interfacial phase observed cross-sections membranes. PPy/PAN-H membrane fabricated reacting 0.5 mol L −1 (NH 4 ) 2 S O 8 5.0 wt% exhibited a Rose Bengal (RB) rejection 99.2% isopropanol (IPA), relatively high solvent permeance. For first time, graphene oxide (GO) incorporated into dispersing GO ethanol solution before polymerization. led to significant enhancement permeance without compromising RB rejection. Compared pure membranes, methanol (MeOH), (EtOH), (IPA) permeances GO-PPy/PAN-H were approximately 945%, 635% 302% higher, respectively. In long term experiment, constant IPA 1.21 L m −2  h  bar 99.0%. Therefore, newly developed this have potential for practical applications.