4.6 Article

Polymeric membranes through self-initiation and self-polymerization for high-performance bioethanol pervaporation

期刊

JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 34, 页码 17699-17709

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta04701b

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资金

  1. National Key Research and Development Program of China [2021YFC2101202]
  2. National Natural Science Foundation of China [21978016]
  3. Beijing Natural Science Foundation [2222015]
  4. Bingtuan Science and Technology Program [2022DB025]
  5. China Postdoctoral Science Foundation [2021M700011]
  6. Fundamental Research Funds for the Central Universities [ZY2209]
  7. Ministry of Finance of PRC
  8. Ministry of Education of PRC

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Polymeric membranes are in high demand for biofuels. UV-induced crosslinking offers a controllable and ultrafast method for membrane fabrication, but the poor compatibility between the photoinitiator and polymer poses a challenge for large-scale production. In this study, we develop a polydimethylsiloxane prepolymer functionalized with both a photoinitiator and photocrosslinker, allowing for self-initiation and self-polymerization. The resulting membranes exhibit excellent performance for bioethanol enrichment compared to current polymeric membranes.
Polymeric membranes are in great demand for biofuels, and ultraviolet (UV)-induced crosslinking currently shows a controllable and ultrafast ability for their fabrication, whereas the weak compatibility between the photoinitiator (PI) and polymer remains a great challenge in the large-scale supply of membranes. Herein, we report a polydimethylsiloxane (PDMS) prepolymer simultaneously functionalized with a PI and photocrosslinker, which endows the prepolymer with self-initiation and self-polymerization properties, respectively. The chemically grafted PI shows a stable and homogeneous distribution over 10 days with a superhigh loading (>5 wt%), which provides an extremely high initiation efficiency. Accordingly, the self-initiated/self-polymerized membranes exhibit an excellent comprehensive performance for bioethanol enrichment compared with the state-of-the-art polymeric membranes. Our PI-polymer design provides a general framework for the high-efficiency fabrication of polymeric membranes.

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