秸秆类木质素特征结构的抗紫外辐射性能  

Anti-UV radiation properties of Gramineae lignin's characteristic structures

作　　者：夏樾 谢敏婷 陈振东 蓝武 岳凤霞 XIA Yue;XIE Minting;CHEN Zhendong;LAN Wu;YUE Fengxia(College of Light Industry Science and Engineering,State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China)

机构地区：[1]华南理工大学轻工科学与工程学院/制浆造纸工程国家重点实验室,广东广州510640

出　　处：《精细化工》2023年第7期1497-1504,1519,共9页Fine Chemicals

基　　金：国家自然科学基金(21908072)。

摘　　要：设计、合成了麦黄酮、C5-C5连接的二聚体木质素模型物,并将其及阿魏酸、对香豆酸、芥子酸分别应用于防晒霜中,结合稻草、麦草和燕麦(秸秆类)3种碱木质素特征结构的抗紫外辐射性能,揭示秸秆类木质素特征结构对其抗紫外辐射性能的影响。结果表明,分别将质量分数为2%的木质素模型物或碱木质素添加至保湿霜(低倍防晒霜)后,添加麦黄酮后的防晒霜防晒指数(SPF)增幅最高,阿魏酸次之,分别由基础霜SPF的1.06±0.01(10.00±0.17)提升至4.67±0.25(38.49±1.24)和3.77±0.34(34.69±1.96),增幅显著;而添加对香豆酸和芥子酸后的防晒霜SPF增幅较小,揭示了甲氧基的存在形式对木质素紫外屏蔽性能的影响。3种碱木质素添加至不同基础霜后,相应的SPF呈不同程度的提升。因此,在木质素分离过程中应有效保留阿魏酸及麦黄酮,有利于提升其紫外防护效果;同时,阿魏酸和对香豆酸的存在对秸秆类木质素的抗紫外辐射性能具有显著影响。Lignin model compounds,including tricin and C5-C5-linked dimers,were designed,synthesized,and applied in sunscreen formulation with ferulic acid,p-coumaric acid,sinapic acid,respectively.The influence of the characteristic structure of straw lignin on its ultraviolet radiation resistance were revealed based on the anti-UV radiation properties of the characteristic structure of three alkali lignins from rice straw,wheat straw and oats.The results showed that when 2%mass fraction of lignin model compounds or alkali lignin added to moisturizer(low power sunscreen),the moisturizer with wheat flavone added showed the highest increase,from 1.06±0.01(10.00±0.17)to 4.67±0.25(38.49±1.24),regarding sun protection index(SPF),and the one added ferulic acid came next with the SPF increased to 3.77±0.34(34.69±1.96),respectively,while the addition of p-coumaric acid and erucinic acid only slightly boosted the SPF of the cream body,which revealed the effect of methoxyl on the UV shielding performance of lignin.The addition of the three alkali lignins improved the corresponding SPF of base cream in varous degrees.Therefore,the effectively preservation of ferulic acid and tricin during lignin separation was beneficial to improve the UV protection effect.Meanwhile,the presence of ferulic acid and p-coumaric acid showed significant influence on the UV radiation resistance of straw lignin.

关 键 词：生物质 木质素 禾本科 防晒霜 抗紫外辐射 日化原料 

分 类 号：O636.2[理学—高分子化学] TQ658.24[理学—化学]