林产化学与工业2018，Vol.38Issue(1)：87-92,6.DOI:10.3969/j.issn.0253-2417.2018.01.013
异丁香酚脱氢聚合产物的合成及其抗氧化性能研究
Preparation and Antioxidant Properties of Dehydrogenation Polymer of Isoeugenol
摘要
Abstract
The lignin dehydrogenation polymers(DHP) were prepared using lignin precursor isoeugenol as raw material and laccase as catalyst. The structure of DHP was characterized by FT-IR, 13C NMR spectroscopy and GPC. The antioxidant activity of DHP was also studied by investigating the effect of the product on the half inhibitory concentration(IC50) of diphenyl picrylhydrazyl radical (DPPH·) and on retarding the oxidation of β-carotene. The results showed that the structure of DHP was similar to the Ginkgo milled wood lignin (MWL). The 13C NMR spectrum showed that the typical lignin substructures such as β-5,β-O-4,β-1,β-β exist in the DHP. The content of free phenolic hydroxyl in DHP decreased with the increase of molecular weight. After classification,it was found that the ether-soluble fraction (DHP①) had the best antioxidant properties. The IC50 value of this fraction was only 0.12 g/L. The increase of the volume or concentration of DHP could improve the ability of inhibition of oxidation of β-carotene.关键词
木质素/脱氢聚合/DPPH法/抗氧化性能/β-胡萝卜素Key words
lignin/dehyrogenation polymer/DPPH method/antioxidant property/β-carotene分类
化学化工引用本文复制引用
陈学宽,赵厚宽,吴宏飞,叶哲孜,谢益民..异丁香酚脱氢聚合产物的合成及其抗氧化性能研究[J].林产化学与工业,2018,38(1):87-92,6.基金项目
国家自然科学基金资助项目(31370574,31300494) （31370574,31300494）
湖北省创新团队项目(12053) （12053）
