Abstract Pinewoods are the dominant species in Australian softwood plantations and an important source of renewable lignocellulosic biomass. This work examines interactions between cholinium amino acid (Ch[AA]) ionic liquid (IL) – Water mixtures and pinewood. The Ch[AA] ILs employed were cholinium arginate (Ch[Arg]), cholinium glycinate (Ch[Gly]), and cholinium aspartate (Ch[Asp]), with water contents between 32 and 42 wt%. Pinewood and Ch[AA] ILs were mixed at 90 °C for all samples, and also 120 °C for Ch[Arg], as it dissolved the most biomass at 90 °C. Thermogravimetric analysis (TGA), scanning electron microscopy (SEM), x-ray diffraction (XRD), and compositional (CHNS) analysis were performed on the raw and treated biomass samples to reveal the changes in physical and chemical properties. While Ch[Arg] solubilised the greatest mass of biomass during treatment, the most pronounced changes in decomposition properties was obtained using Ch[Gly]. The TGA analysis revealed the maximum in the derivative weight loss data shifted to lower temperatures by 29 °C.

中文翻译：

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用胆碱-氨基酸离子液体处理后，松木在较低温度下发生热解

摘要 松木是澳大利亚软木种植园的优势树种，是可再生木质纤维素生物质的重要来源。这项工作检查了胆碱氨基酸 (Ch[AA]) 离子液体 (IL) – 水混合物和松木之间的相互作用。所使用的 Ch[AA] IL 是精氨酸胆碱 (Ch[Arg])、甘氨酸胆碱 (Ch[Gly]) 和天冬氨酸胆碱 (Ch[Asp])，水含量在 32 至 42 重量％之间。所有样品的松木和 Ch[AA] ILs 在 90 °C 下混合，Ch[Arg] 在 120 °C 下混合，因为它在 90 °C 下溶解了最多的生物量。对原始和处理过的生物质样品进行热重分析 (TGA)、扫描电子显微镜 (SEM)、X 射线衍射 (XRD) 和成分 (CHNS) 分析，以揭示物理和化学性质的变化。虽然 Ch[Arg] 在处理过程中溶解了最大质量的生物质，但使用 Ch[Gly] 获得了最显着的分解特性变化。TGA 分析显示，导数重量损失数据的最大值转移到较低温度 29 °C。