木质素抗氧化活性的构效关系研究及应用进展

Structure-activity relationship and application of antioxidant property of lignin

摘要:

木质素是一种储量丰富、环境友好的多酚类生物聚合物，可作为天然抗氧化剂使用。同时，木质素具有光稳定性好、抗紫外、可生物降解等优势，如何更好地开发和利用其抗氧化功能引起了研究学者们的广泛关注。首先，该文重点回顾了国内外在木质素抗氧化构效关系方面的研究进展，归纳总结了木质素结构对其抗氧化能力的影响规律及其作用机制，并讨论了目前木质素抗氧化构效关系研究面临的主要问题；其次，从分级纯化、纳米化和化学改性三种技术方法出发，介绍了近年来研究人员在强化木质素抗氧化能力方面作出的努力；最后，基于木质素在防晒护肤品、高分子功能复合材料和医药材料中的应用现状，评述了木质素抗氧化特性对紫外防护、热氧稳定性、抑菌等性能的贡献，为今后木质素基功能材料的制备及应用提供一定参考。

Abstract:

Lignin is a kind of abundant and environment-friendly polyphenol polymer that can be used as a natural antioxidant. Meanwhile, lignin has the advantages of good light stability, UV resistance and biodegradability, how to better develop and utilize its antioxidant function has attracted extensive attention of researchers. First, this paper summarized the recent advances about the structure-activity relationship of lignin antioxidant, the influence and mechanism of lignin microstructural on its antioxidant ability were summarized, and the main problems faced by structure-activity study were discussed. Secondly, the efforts on improving the antioxidant activity of lignin were introduced from the perspectives of fractional purification, nano modification and chemical modification. Finally, by introducing the application of lignin in sunscreen, polymer functional composites and medical materials, the contribution of antioxidant property of lignin to the anti-UV ability, thermal oxygen stability and bacteriostatic activity was discussed, which could provid a reference for the preparation and application of lignin-based functional materials.