作　　者： ; ; ; ; ; (杨猛）;

机构地区： 山东轻工业学院轻化与环境工程学院制浆造纸科学与技术教育部重点实验室

出　　处： 《中国造纸学报》 2009年第1期56-59,共4页

摘　　要： 研究了麦草NaOH-AQ浆在氧脱木素过程中木素结构的变化。采用酶-弱酸解两段法提取浆中残余木素;利用酸析法从黑液中分离出溶出木素试样,经过弱酸解得到提纯的木素试样。通过凝胶渗透色谱(GPC)对所得的木素试样分别进行分子质量检测,得出各种木素的分子质量分布及变化,并对其进行了分析对比;利用磷谱核磁共振(31P-NMR)技术对木素结构中脂肪羟基、总酚羟基、羧基以及总酚羟基中各酚羟基等官能团进行定量分析对比,以全面了解木素结构在氧脱木素中的变化规律。 The change of lignin structure of wheat straw soda-anthraquinone pulp during oxygen delignification was studied.Different residual lignin samples were isolated from the pulps by using the two-stage method of enzyme-mild acidic hydrolysis solution.The acid-precipitating method was used to isolate the dissolved lignin from the black liquor and the crude lignin was purified by mild acidic hydrolysis.All of the lignin samples were analyzed by GPC,and the changes of molecular weight of the lignin were studied and compared.After derivation of the lignin samples,the ^31P-NMR spectra of phosphorized were obtained and the functional groups of the lignin were quantitatively analyzed and compared in order to discover the change of lignin structures during oxygen deligninfication.

关 键 词： 麦草浆 氧脱木素 木素分子质量 木素结构

领　　域： [轻工技术与工程]