Pulsed Discharge Plasma over the Surface of an Aqueous Solution to Induce Lignin Decomposition
Pulsed Discharge Plasma over the Surface of an Aqueous Solution to Induce Lignin Decomposition
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DOI：
10.1007/s13369-021-05806-1
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发表时间：
2021-06
影响因子：
2.9
通讯作者：
W. Diono;Takumi Ibuki;S. Machmudah;H. Kanda;M. Bito;Yaping Zhao;M. Goto
中科院分区：
文献类型：
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作者：
W. Diono;Takumi Ibuki;S. Machmudah;H. Kanda;M. Bito;Yaping Zhao;M. Goto
在这项工作中，非平衡大气压等离子体被引入到作为介质的水溶液中，采用10 kV的施加电压和10 kHz的频率解聚木质素。作为起始材料，使用深共熔溶剂（DES）在50-120 °C下从日本雪松木粉中提取木质素。傅里叶变换红外光谱（FT-IR）表明，木质素提取日本雪松木粉在此温度范围内。此外，在280 nm处的产物的液体部分的紫外-可见（UV-Vis）光谱揭示了提取物的高木质素含量。凝胶渗透色谱（GPC）分析表明，木质素的平均分子量为400-700 Da。基质辅助激光解吸/电离飞行时间质谱（MALDI-TOF MS）表明，长时间的放电等离子体处理同时促进进一步解聚反应和再聚合的木质素衍生的化合物。
In this work, non-equilibrium atmospheric-pressure plasma was introduced over an aqueous solution as a medium to depolymerise lignin employing an applied voltage of 10 kV and a frequency of 10 kHz. As a starting material, lignin was extracted from Japanese cedar wood flour utilising a deep eutectic solvent (DES) at 50–120 °C. The Fourier-transform infrared (FT–IR) spectra indicated that lignin was extracted from the Japanese cedar wood flour in this temperature range. Additionally, the ultraviolet–visible (UV–Vis) spectra of the liquid fraction of the products at 280 nm revealed the high lignin content of the extracts. Gel permeation chromatography (GPC) revealed that the average molecular weight of the lignin was 400–700 Da. Matrix-assisted laser desorption/ionisation time-of-flight mass spectrometry (MALDI-TOF MS) illustrated that the prolonged discharge plasma treatment concurrently promoted the further depolymerisation reaction and repolymerisation of the lignin-derived compounds.