Visible-light-induced ultrafast preparation of PDMS membrane for the pervaporative separation of furfural
2022
Wang, Yaqi | Xue, Tanlong | Si, Zhihao | Liu, Chang | Yang, Shuai | Li, Guozhen | Zhuang, Yan | Qin, Peiyong
Recently, the preparation of polymeric membranes by UV-induced polymerization is encouraged due to the ultrafast curing and controllable operation. However, the long-period exposure under UV light has a great threat to both the environment and operators. Herein, we developed the visible-light-induced polymerized PDMS membrane for the pervaporative separation of furfural. The differences among photoinitiator ethyl(2,4,6-trimethylbenzoyl)phenylphosphinate (TPO-L), diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO) and 2-hydroxy-2-methylpropiophenone (1173) in the polymerization kinetics, membrane structure and separation performance are compared. Results show that the absorbance of TPO-L matches 405 nm of the visible light region; and it can be well dispersed and compatible with PDMS and obtain high initiation efficiency. Furthermore, the conditions including TPO-L concentration and PDMS viscosity are optimized, and the prepared membrane has an outstanding pervaporation performance containing 1299.5 g m⁻² h⁻¹ of total flux and 40.2 of furfural separation factor. Importantly, the ultrafast and continuous preparation process of membrane is operated by a home-made machine, indicating the wonderful potential for its large-scale application.
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