The synthesis of biobased plastics is highly attractive from the viewpoint of oil depletion and the transition toward sustainable development. In this study, semi-bio-poly- and copolyamides were obtained from biobased 2,5-furandicarboxylic acid (FDCA) with different diamines containing tetracyclo, −CH₃, and −C(CF₃)₂– groups. Four processable aromatic semi-bio-polyamides provided flexible transparent membranes with tunable gas separations, plasticization resistance in the tested range (2–10 bar), and good thermal and mechanical properties. The co-PMBD copolyamide containing FDCA and methylenebis(2,6-dimethylaniline) (MBD) displayed the highest gas permeability with good selectivity for CO₂ and H₂ (P_CO2 = 26.9 and P_H2 = 69.8 with H₂/CH₄ = 61.2 and CO₂/CH₄ = 23.6) in comparison with its homologues. All FDCA based membranes obtained exhibited higher permeability with a similar H₂/CH₄ and CO₂/CH₄ selectivity compared to commercial Matrimid and cellulose acetate membranes. Moreover, after 30 days of enzymatic degradation, membrane surfaces presented noticeable hollow cavities and uneven surfaces.

中文翻译：

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用于气体分离的源自 2,5-呋喃二甲酸的半生物基聚酰胺膜


从石油枯竭和向可持续发展过渡的角度来看，生物基塑料的合成极具吸引力。在本研究中，从生物基 2,5-呋喃二甲酸 (FDCA) 与含有四环、-CH ₃ 和 -C(CF ₃ – 组。四种可加工的芳香族半生物聚酰胺提供了柔性透明膜，具有可调节的气体分离、测试范围内的耐塑化性（2-10巴）以及良好的热性能和机械性能。含有 FDCA 和亚甲基双(2,6-二甲基苯胺) (MBD) 的 co-PMBD 共聚酰胺表现出最高的气体渗透率，对 CO ₂ 和 H ₂ 具有良好的选择性 (P _CO2 = 26.9 且 P _H2 = 69.8，其中 H ₂ /CH ₄ = 61.2 且 CO ₂ /CH ₄ = 23.6) 与其同系物相比。与商用膜相比，获得的所有基于 FDCA 的膜均表现出更高的渗透性，并且具有相似的 H ₂ /CH ₄ 和 CO ₂ /CH ₄ 选择性Matrimid 和醋酸纤维素膜。此外，酶降解30天后，膜表面出现明显的空腔和不平坦的表面。