We report a new type of alkaline-stable hollow-fiber reverse osmosis (RO) membrane with an outside-in configuration that was established via adsorption of positively charged poly(vinyl alcohol) copolymers containing a small amount of quaternary ammonium moieties. Anionic sulfonated poly(arylene ether sulfone nitrile) hollow-fiber membranes were utilized as a substrate upon which the c... https://www.nacrack.com/amazing-offer-Premium-Crushed-Velvet-120-Round-Tablecloth-Fuchsia-Reusable-Soft-Stylish-Seamless-Table-Cover-save-extra/