Preparation of lignosulfonate-based nanofiltration membranes with improved water desalination performance.

ABSTRACT: Pulping and papermaking generate large amounts of waste in the form of lignosulfonates which have limited valorized applications so far. Herein, we report a novel lignosulfonate-based nanofiltration membrane, prepared by using polyethylenimine (PEI) and sodium lignosulfonate (SL) via a layer-by-layer (LbL) self-assembly. As a low-cost and renewable natural polyelectrolyte, SL is selected to replace the synthetic polyelectrolyte commonly used in the conventional LbL fabrication for composite membranes. The prepared LbL (PEI/SL)₇ membranes were crosslinked by glutaraldehyde (GA) to obtain (PEI/SL)₇-GA membranes with compact selective layer. We characterized (PEI/SL)₇ and (PEI/SL)₇-GA membranes to study the chemical compositions, morphologies, and s

SUBMITTER: Liu W 

PROVIDER: S-EPMC8182288 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature