A lignin-based nanofiltration membrane was fabricated using aminated lignin and trimesoyl chloride as raw materials by an interfacial polymerization approach. The obtained membrane possesses excellent pure water permeability (31.2 L m⁻² h⁻¹bar⁻¹), high retention rates (> 95%) to multivalent salts (EDTA and sodium citrate) and organic dyes (brilliant blue R and congo red), satisfactory acid-alkali and chlorine resistances, and separation-performance stability. It also shows better retention capability and alkaline stability than those of the membrane fabricated with pristine alkali lignin due to the high crosslinking degree.

中文翻译：

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具有高渗透性、耐酸碱和氯的木质素基纳滤膜，可去除多价盐和染料

以胺化木质素和均苯三甲酰氯为原料，采用界面聚合法制备木质素基纳滤膜。获得的膜具有优异的纯水渗透性（31.2 L m ^-2 h ^-1 bar ^-1），对多价盐（EDTA和柠檬酸钠）和有机染料（亮蓝R和刚果红）的高保留率（> 95％） ，良好的耐酸碱、耐氯性，分离性能稳定。由于高交联度，它还显示出比用原始碱木质素制备的膜更好的保留能力和碱性稳定性。