Oxidative modification methods were applied to modify industrial lignin in acidic or alkaline conditions using hydrogen peroxide as the oxidant. Analysis of FTIR and UV showed that the main functional groups of the industrial lignin changed to different degrees. The structural changes of the lignin were different in acidic and alkaline conditions because of their different oxidation mechanisms. The single-factor experiment shows that the fiberboard has better physical and mechanical properties in acidic conditions when the oxidant dosage is 10% ; while it is 30% in alkali conditions. Oxidation condition and oxidant dosage have regular influences on the properties of fiberboard.%以过氧化氢为氧化剂,采用氧化改性方法分别在酸、碱条件下对工业木质素进行氧化改性.由于酸、碱条件下的氧化机理不同,通过傅里叶变换红外光谱与紫外光谱分析得出酸、碱条件下,工业木质素的主要官能团均发生了不同程度的变化,两种条件下木质素分子结构变化存在差异.以氧化剂用量为单因素的制板试验结果表明,酸性条件下氧化剂用量为10％时,板材各项物理力学性能较优；碱性条件下氧化剂用量为30％时板材各项物理力学性能较优.氧化条件和氧化剂用量对板材性能影响规律明显.
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