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.

中文翻译：

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用于高性能生物乙醇渗透蒸发的自引发和自聚合聚合物膜

聚合物膜对生物燃料的需求量很大，紫外线（UV）诱导的交联目前显示出可控和超快的制备能力，而光引发剂（PI）与聚合物之间的弱相容性仍然是大规模供应的一大挑战的膜。在这里，我们报道了一种同时用 PI 和光交联剂功能化的聚二甲基硅氧烷 (PDMS) 预聚物，它分别赋予了预聚物自引发和自聚合性能。化学接枝的 PI 在 10 天内表现出稳定且均匀的分布，具有超高负载（>5 wt%），提供了极高的引发效率。因此，与最先进的聚合物膜相比，自引发/自聚合膜在生物乙醇富集方面表现出优异的综合性能。我们的 PI-聚合物设计为高效制造聚合物膜提供了一个通用框架。