Lignin alkali regulated interfacial polymerization towards ultra-selective and highly permeable nanofiltration membrane

Thin-film composite polyamide (TFC PA) membranes hold promise for energy-efficient liquid separation, but achieving high permeance and precise separation membrane via a facile approach that is compatible with present manufacturing line remains a great challenge. Herein, we demonstrate the use of lignin alkali (LA) derived from waste of paper pulp as an aqueous phase additive to regulate interfacial polymerization (IP) process for achieving high performance nanofiltration (NF) membrane. Various characterizations and molecular dynamics simulations revealed that LA can promote the diffusion and partition of aqueous phase monomer piperazine (PIP) molecules into organic phase and their uniform dispersion on…

• NN
  National Natural Science Foundation of China

  Awards: 51270063, 52170063
• RG
  Research Grants Council, University Grants Committee
• SC
  South China University of Technology
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Awards: 2024B1515040015, 2022A1515010731, 2024A1515012474