The present work provides an efficient strategy to prepare mussel-inspired nanofiltration membranes with lower MWCO, via combining the catechol-amine chemistry and the chemistry of amino-silane coupling agents. The membranes were synthesized by stepwise depositing tannic acid (TA) and pre-hydrolyzed 3-aminopropyltriethoxysilane (APTES) on the PSF support. TA adsorbed on the polysulfone (PSF) support via hydrogen bonding. The pre-hydrolyzed APTES self-polymerized and reacted with TA, forming a crosslinked network through the Michael addition/Schiff base reactions. The membrane performance was tailored by controlling the hydrolysis degree of APTES. At optimal conditions, the APTES-TA/PSF membrane with MWCO of 200 Da and water permeance of 11 Lm⁻²h⁻¹bar⁻¹ was fabricated. The salt rejections toward Na₂SO₄ and NaCl were around 90% and 20% respectively. The continuous prolonged filtration showed the membrane had good filtration stability. Compared with previously reported mussel-inspired and polyphenol membranes, the present membrane had a much lower MWCO and higher permeance. The membrane can efficiently remove typical pharmaceuticals with molecular weight from 200 to 400 Da, indicating this type of membrane has promising prospects in trace-organic contaminated wastewater treatment.

目前的工作提供了一种有效的策略，通过结合儿茶酚胺化学和氨基硅烷偶联剂化学来制备具有较低截留分子量的受贻贝启发的纳滤膜。该膜是通过在 PSF 载体上逐步沉积单宁酸 (TA) 和预水解的 3-氨丙基三乙氧基硅烷 (APTES) 来合成的。TA 通过氢键吸附在聚砜 (PSF) 载体上。预水解的APTES自聚合并与TA反应，通过迈克尔加成/席夫碱反应形成交联网络。通过控制 APTES 的水解度来调整膜性能。在最佳条件下，制备了^{截留分子​​量为200 Da、透水率为11 Lm -2} h ^-1 bar ^-1的APTES-TA/PSF膜。_{对Na 2} SO ₄和NaCl的脱盐率分别约为90%和20%。连续长时间的过滤表明膜具有良好的过滤稳定性。与之前报道的贻贝膜和多酚膜相比，本发明的膜具有更低的截留分子量和更高的渗透性。该膜可以有效去除分子量为200~400 Da的典型药物，表明该膜在痕量有机污染废水处理中具有广阔的前景。