Silane-Modified 2D MOF Membrane

High n-butanol selectivity

A silane-modified 2D MOF incorporated as a hydrophobic filler into PDMS enables fast permeation and high selectivity for n-butanol recovery from aqueous systems.

Yunfan, Zhou · Jingwen, Xu · Sun, Li · Wang, Wei · Bo, Yuan · Hu, Mingjie · Huang, Chi · Pan, Yun

Separation and Purification Technology 2025

Specifications

Separation factor

{'zh': '48.24', 'en': '48.24'}

n-Butanol flux

{'zh': '508.7', 'en': '508.7'} g·m⁻²·h⁻¹

Advantages

Near-50 separation factor

The hydrophobic 2D MOF sheets form continuous pathways in PDMS that preferentially transport n-butanol, yielding a separation factor of 48.24.

Flux boosted

J_n reaches 508.7 g·m⁻²·h⁻¹, enabled by a multi-stage molecular mass-transfer mechanism that lowers diffusion resistance.

Operational stability

Silane modification improves filler–polymer interaction and weatherability, ensuring long-term operational stability.

Applications

• Pervaporation membranes：Use in pervaporation setups to selectively remove n-butanol from dilute aqueous solutions.
• Mixed matrix membranes：As a mixed matrix membrane, hydrophobic fillers enhance the n-butanol separation performance of PDMS.
• MOF-based membranes：Employ silane-modified 2D MOF as filler to create multistage transport pathways within the membrane.
• Biobutanol recovery：Recover n-butanol efficiently from fermentation broths, improving biorefinery economics.