三倍体毛白杨原料木素结构分析

采用酶-弱酸解两段法从三倍体毛白杨原料木粉中分离出原料木素。通过凝胶渗透色谱分析（GPc），对原料木素试样分别进行了分子量的检测，得出原料木素的分子量分布，计算出原料木素质均和数均分子量。经过衍生化后的原料木素，可以通过磷谱核磁共振（51P--NMR）技术得出原料木素结构谱图，对原料木素结构中脂肪羟基、总酚羟基和羧基以及总酚羟基中各酚羟基等功能基团进行定量分析对比。对三倍体毛白杨原料木素结构有了更全面了解。

Structural analysis of raw material lignin from triploid of polulus tomentosa

The two-stage method of enzyme-weak acid solution was used to isolate raw material lignin from the triploid of populus tomentosa.The raw material lignin samples were analyzed through GPC, the molecular weight distribution was tested, the molecular weight distribution ofraw material lignin was obtained and the quantity-average molecular weight and mass-average molecular weight of raw material lignin wereobtained. The raw material lignin structure spectrogram of the derived raw material lignin was obtained with phosphorus nuclear magneticresonance (31P -NMR) technology and the contents of such phenolic function groups in the lignin structure as aliphatic hydroxyl, total phenolichydroxyl and the phenolic hydroxyl in carboxyl and total phenolic hydroxyl were quantitatively analyze and compared, which leads us to adeeper understanding on raw material lignin structures of the triploid of polulus tomentosa.