In ultrafiltration, the molecular weight cut-off or MWCO of a membrane refers to the lowest molecular weight of the solute (in daltons) for which 90% of the solute is retained by (prevented from passing through) the membrane, [1] or the molecular weight of the molecule (e.g. globular protein) that is 90% retained by the membrane.

在超滤 (uf) 和纳滤 (nf) 之间的范围内估算膜分子量截止 (mwco) 具有挑战性，因为保留不仅仅由尺寸排阻控制。本综述提供了从 uf 到松散 nf（500 至 0.7 kda）范围内的膜 mwco 的实验和理论概述，以评估膜 mwco 在…

2025年1月3日 · Membranes with lower MWCO showed significantly reduced permeate fluxes. Cellulose-based membranes exhibited similar fluxes averaging 60 LMH, while fluxes varied among PES membranes by MWCO, with 100 kDa at 55 LMH (+R) and 41 LMH, and 300 kDa PES membranes averaged at 32 LMH.

Comparative analysis revealed that the currently established mathematical equations among R t, L d /A, and MWCO caused a more significant divergence between the predicted and measured values for PCMs when L d /A or R t was outside the range of the selected CUF membranes, indicating that simply using the governing equations was more likely to pro...

2021年3月15日 · The results provide fundamental insights into the factors controlling dextran retention and the calculated MWCO, while at the same time providing guidance to membrane manufacturers and end-users on the most appropriate conditions (i.e. feed and permeate flux) for evaluating the MWCO for hollow fibers with different geometry, pore size, and ...

在 4 bar 跨膜压力和 20℃ 下，渗透通量为 70 lmh，远高于 RO 和 NF 膜的通量。 同样，阳离子聚电解质已用于去除铬酸盐等阴离子和软化水。 胶束增强超滤由于其独特的聚集和溶解特性，表面活性剂胶束已被用于通过 UF 去除低分子量有机化合物。

Download scientific diagram | Comparison of water permeability (LMH bar–1) and MWCO (Da) of MP-based membranes with commercial NF or ultrafiltration membranes tested in the same experimental...

2022年5月15日 · To measure the MWCO of the prepared ceramic membranes, the initial water flux was set to 30±1 LMH with a CFV of 10 cm/s during all experiments and 3 g/L of poly-ethylene glycols (PEGs) with molecular weights of 200, 400, 1000, 2000, 6000, and 20,000 g/mol were used as standard matters.

2023年11月22日 · 通常用 截留分子量 （MWCO: molecular weight cutoff）表征孔径大小，但不同结构的分子，即使分子量相同，其分子粒径也有较大的差异。不同厂家使用的标定物质也会不同，因此实际使用时，截留率也会有一定的差异。

2020年1月27日 · Specifically, the OmpF membrane has ~20 times greater water permeability than the highest permeability commercial membrane, NF270 (water permeability of 14.7 ± 0.7 LMH bar –1 with MWCO of 400...