对硝基苯酚对油棕叶（OPF）木质素聚合物结构特征和抗氧化活性的影响。
The effect of p-nitrophenol toward the structural characteristics and antioxidant activity of oil palm fronds (OPF) lignin polymers.
作者信息
Sa'don Nurul Atiqah, Rahim Afidah Abdul, Hussin M Hazwan
机构信息
Lignocellulosic & Materials Technology Research Group, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
Lignocellulosic & Materials Technology Research Group, School of Chemical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
出版信息
Int J Biol Macromol. 2017 May;98:701-708. doi: 10.1016/j.ijbiomac.2017.01.137. Epub 2017 Feb 4.
This article reports on the structural characteristics and antioxidant activity of unmodified autohydrolyzed ethanol organosolv lignin (AH EOL) extracted from oil palm fronds (OPF) and modified autohydrolyzed ethanol organosolv lignin via incorporation of p-nitrophenol (AHNP EOL). The isolated lignin were analyzed by FTIR, H and C NMR spectroscopy, 2D NMR; HSQC and HMBC, CHN analysis, molecular weight distribution using GPC analyzer, thermal analysis; TGA and DSC. The chemical modification by utilizing an organic scavenger during delignification process provided smaller lignin fragments and enhanced the solubility of lignin by reducing its hydrophobicity properties. It was revealed that the antioxidant properties increased as compared to the unmodified organosolv lignin. Additionally, the modified lignin has better solubility in water (D=35%>D=25%).
本文报道了从油棕叶（OPF）中提取的未改性自水解乙醇有机溶剂木质素（AH EOL）以及通过掺入对硝基苯酚改性的自水解乙醇有机溶剂木质素（AHNP EOL）的结构特征和抗氧化活性。通过傅里叶变换红外光谱（FTIR）、氢和碳核磁共振光谱、二维核磁共振；异核单量子相干（HSQC）和异核多键相关（HMBC）、元素分析（CHN）、使用凝胶渗透色谱分析仪分析分子量分布、热分析；热重分析（TGA）和差示扫描量热法（DSC）对分离出的木质素进行了分析。在脱木质素过程中利用有机清除剂进行化学改性可提供更小的木质素片段，并通过降低其疏水性来提高木质素的溶解度。结果表明，与未改性的有机溶剂木质素相比，其抗氧化性能有所提高。此外，改性木质素在水中具有更好的溶解性（D = 35%>D = 25%）。
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