Intrinsically microporous oligomers (or oligomers of intrinsic microporosity, OIM) for use as organic poro-gens were first synthesized and subsequently incorporated into polysulfone (PSU) matrices to produce mixed-matrix membranes (MMMs) for gas separation. Their molecular weight was controlled to be about M n =2,800 (n~5–6), and their end groups were regulated to be either -OH (OH-OIM) or -F (F-OIM) for improvement in the compatibility between OIM and PSU. The intrinsic pores of OIM greatly increase the gas permeability of PSU with only a small loss of gas selectivity. For instance, 20/80 wt% OH-OIM/PSU MMMs yield up to three- to four-fold higher permeability of CO 2 and He compared to neat PSU, mostly associated with the intrinsic pores of OIM and its high compatibility with PSU. Additionally, very little reduction in separation performance was observed over 100 days. This suggests OIM as a promising organic porogen of MMMs for improving gas separation performance.

中文翻译：

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固有微孔低聚物作为混合基质膜的有机致孔剂

首先合成用作有机致孔剂的固有微孔低聚物（或固有微孔低聚物，OIM），然后将其掺入聚砜 (PSU) 基质中以生产用于气体分离的混合基质膜 (MMM)。它们的分子量被控制在大约 Mn =2,800 (n~5-6)，并且它们的端基被调节为 -OH (OH-OIM) 或 -F (F-OIM) 以改善它们之间的相容性。 OIM 和电源。OIM 的固有孔隙大大增加了 PSU 的气体渗透性，而气体选择性只有很小的损失。例如，与纯 PSU 相比，20/80 wt% OH-OIM/PSU MMM 产生高达三到四倍的 CO 2 和 He 渗透性，这主要与 OIM 的固有孔隙及其与 PSU 的高相容性有关。此外，在 100 天内观察到分离性能几乎没有下降。这表明 OIM 是一种很有前途的 MMM 有机致孔剂，可用于提高气体分离性能。