Sulfonated Cellulose Membranes: Physicochemical Properties and Ionic Transport versus Degree of Sulfonation

The next generation of green ion selective membranes is foreseen to be based on cellulosic nanomaterials with controllable properties. introduction ionic groups into the cellulose structure via chemical modification one strategy obtain desired functionalities. In this work, bleached softwood fibers are oxidatively sulfonated and thereafter homogenized liberate nanofibrils (CNFs) from fiber walls. liberated CNFs subsequently used prepare characterize novel membranes. It found that degree sulfonation collectively affects several important properties density fixed charged surfaces CNFs, in particular membrane morphology, water uptake swelling, correspondingly transport. Both conductivity cation transport increase increased level starting material. Thus, it shown can as a tool for precise rational design replace expensive conventional fluorinated ionomer