Herein, fatty acid esters were synthesized cost-effectively from various fatty acids using reusable lipase (L) immobilized with novel porous ionic polymer (PIP) (l–PIP). The functionalized mesoporous PIP was synthesized through Friedel–Crafts alkylation reaction of 1, 4-bis(bromomethyl) benzene in the presence of ferric chloride as catalyst, and lipase was completely immobilized with PIP at varied time, forming l–PIP–6_H, l–PIP–12_H, l–PIP–18_H, l–PIP–24_H, l–PIP–30_H, and l–PIP–36_H, which were applied in ester production. l–PIP–30_H was characterized using FT–IR, SEM, XPS, solid–state ¹³C NMR, and N₂ adsorption–desorption isotherms. The conversion of oleic acid reached 88.21 % under optimized conditions (12:1 ethanol/oleic acid molar ratio after 5 h at 45 °C with 250 wt% catalyst at 300 rpm). The stability and reusability of l–PIP–30_H were demonstrated by the sustained catalytic efficiency for at least six reaction cycles. Good catalytic activity during the esterification of various free fatty acids with ethanol was observed. This cost–efficient and effective lipase–immobilized PIP catalyst may have positive economic and environmental repercussions to inspire further academic and industrial research on biodiesel.

在此，使用固定有新型多孔离子聚合物 (PIP) ( l - PIP) 的可重复使用的脂肪酶 (L)，从各种脂肪酸中经济高效地合成脂肪酸酯。功能化介孔 PIP 是通过 1, 4-双（溴甲基）苯在氯化铁作为催化剂存在下的 Friedel-Crafts 烷基化反应合成的，脂肪酶在不同时间与 PIP 完全固定，形成l -PIP-6 _H，l –PIP–12 _H、l –PIP–18 _H、l –PIP–24 _H、l –PIP–30 _H和l –PIP–36 _H, 应用于酯类生产。使用 FT-IR、SEM、XPS、固态¹³ C NMR 和 N ₂吸附-脱附等温线对l –PIP-30 _{H进行了表征。}在优化条件下（乙醇/油酸摩尔比为 12:1，在 45 °C 下使用 250 wt% 催化剂，300 rpm 下 5 小时后），油酸的转化率达到 88.21%。l –PIP–30 _H的稳定性和可重用性至少六个反应循环的持续催化效率证明了这一点。在各种游离脂肪酸与乙醇的酯化过程中观察到良好的催化活性。这种具有成本效益且有效的脂肪酶固定化 PIP 催化剂可能具有积极的经济和环境影响，以激发对生物柴油的进一步学术和工业研究。