不同化学工艺从甘蔗渣中提取木质素的抗氧化活性。
Antioxidant activities of lignin extracted from sugarcane bagasse via different chemical procedures.
机构信息
School of Chemistry and Chemical Engineering and Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, 530004 Nanning, PR China.
出版信息
Int J Biol Macromol. 2012 Dec;51(5):1116-20. doi: 10.1016/j.ijbiomac.2012.09.004. Epub 2012 Sep 13.
Lignin was extracted from sugarcane bagasse via different chemical procedures with ethanol and alkaline solutions. The products (EL, AL) were characterized by UV, FT-IR, (13)C NMR, TGA, GPC and potentiometric titration. The results indicated AL had more phenolic hydroxyl (PhOH) and methoxyl groups (OCH(3)), and larger molecular mass and better thermal stability than EL. The lignins were further evaluated as potential antioxidants. The results demonstrated the radical scavenging activity (RSA) of AL was 79.0%, 91.3% higher than EL at the concentration of 300 mg L(-1). The stronger antioxidant activity of AL was due to its higher quantities of PhOH and OCH(3) groups.
采用乙醇和堿溶液对甘蔗渣进行不同的化学处理，提取木质素。通过紫外分光光度法、傅里叶变换红外光谱法、（13）C 核磁共振、热重分析、凝胶渗透色谱法和电位滴定法对产物（EL、AL）进行了表征。结果表明，AL 具有更多的酚羟基（PhOH）和甲氧基（OCH(3)）基团，以及更大的分子量和更好的热稳定性。进一步将木质素评估为潜在的抗氧化剂。结果表明，在 300mg/L 浓度下，AL 的自由基清除活性（RSA）为 79.0%，比 EL 高 91.3%。AL 具有更强的抗氧化活性，是由于其具有更多的 PhOH 和 OCH(3)基团。
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