Biotechnology Research Institute, National Research Council of Canada, 6100 Royalmount Ave., Montreal, Quebec, Canada H4P 2R2.
Bioresour Technol. 2012 Jan;104:775-82. doi: 10.1016/j.biortech.2011.11.079. Epub 2011 Nov 26.
Presently lignin is used as fuel but recent interests in biomaterials encourage the use of this polymer as a renewable feedstock in manufacturing. The present study was undertaken to explore the potential applicability of microwaves to isolate lignin from agricultural residues. A central composite design (CCD) was used to optimize the processing conditions for the microwave (MW)-assisted extraction of lignin from triticale straw. Maximal lignin yield (91%) was found when using 92% EtOH, 0.64 N H(2)SO(4), and 148 °C. The yield and chemical structure of MW-extracted lignin were compared to those of lignin extracted with conventional heating. Under similar conditions, MW irradiation led to higher lignin yields, lignins of lower sugar content, and lignins of smaller molecular weights. Except for these differences the lignins resulting from both types of heating exhibited comparable chemical structures. The present findings should provide a clean source of lignin for potential testing in manufacturing of biomaterials.
目前，木质素被用作燃料，但最近人们对生物材料的兴趣促使人们将这种聚合物作为可再生原料用于制造。本研究旨在探讨微波在从农业废弃物中分离木质素方面的潜在应用。采用中心组合设计（CCD）优化了微波辅助提取黑麦草秸秆木质素的工艺条件。当使用 92%乙醇、0.64N H2SO4和 148°C 时，木质素的最大得率（91%）。比较了微波提取木质素和常规加热提取木质素的产率和化学结构。在相似的条件下，微波辐射导致木质素产率更高、糖含量更低、分子量更小。除了这些差异，两种加热方式得到的木质素具有相似的化学结构。本研究结果应为潜在的生物材料制造提供一种清洁的木质素来源。
