Abstract Brӧnsted acidic poly ionic liquid (PIL-M) was successfully prepared by free-radical polymerization. The surface area of the heterogeneous catalyst was 301.1 m 2 /g. The result of thermogravimetric (TG) proved that PIL-M had good thermal stability (decompose at 410 °C). The optimal reaction condition was as follows: 6 wt% catalyst amount, reaction temperature 80 °C, the ratio of methanol to oleic acid 9:1 and reaction time 3 h. Under the optimal condition, the yield of methyl oleate was up to 95.9%. The excellent catalytic activity of PIL-M in the product of biodiesel benefit from its excellent properties such as high surface area (301.1 m 2 /g) and hierarchical nanopores. Compared with commercial resin (Amberlyst 15) and other catalysts, PIL-M showed better catalytic activity. The yield of methyl oleate was still over 90% after four times reuse. The structure of PIL-M kept stable after four times reuse, which was confirmed by the FT-IR spectrum. Graphic Abstract

中文翻译：

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交联聚酸性离子液体的合成及其在生物柴油生产中的应用

摘要 采用自由基聚合方法成功制备了Brӧnsted酸性聚离子液体(PIL-M)。多相催化剂的表面积为301.1m 2 /g。热重（TG）结果证明PIL-M具有良好的热稳定性（410℃分解）。最佳反应条件为：催化剂用量6wt%，反应温度80℃，甲醇油酸比9:1，反应时间3h。在最佳条件下，油酸甲酯的收率高达95.9%。PIL-M在生物柴油产品中的优异催化活性得益于其高表面积（301.1 m 2 /g）和分级纳米孔等优异性能。与商业树脂（Amberlyst 15）和其他催化剂相比，PIL-M 表现出更好的催化活性。重复使用四次后，油酸甲酯的产率仍保持在90%以上。PIL-M的结构在重复使用四次后仍保持稳定，FT-IR光谱证实了这一点。图形摘要