SO_4^(2-)/TiO_2固体酸降解莲房中高聚体原花青素研究

Research on Degradation of High Polymer Procyanidins from the Lotus Seed Pot with SO_4^(2-)/TiO_2 Solid Acid

高聚体原花青素的抗氧化性能明显不如低聚体,而且不易被人体吸收利用.该研究致力于制备性能优良的SO_4^(2-)/TiO_2固体酸催化剂,采用该固体酸降解莲房中提取的高聚体原花青素.用紫外分光光度计和凝胶色谱仪进行分析,以平均聚合度和降解率作为参考指标,对该反应的降解效果进行评价.研究结果表明,以10 mL高聚体原花青素溶液作为降解原料,固体酸加入量为0.05 g,反应温度为70℃,反应时间为60 min的反应条件下,高聚体的平均聚合度从5.95降为2.31,降解率可以达到61.18%.

The antioxidant performance of the high-polymer procyanidins was not as good as that of oligomers,and it was not easily absorbed and utilized by the human body.This research focused on the preparation of SO4^2-/TiO2 solid acid catalysts with excellent properties.The solid acid was used to degrade the high-polymer procyanidins in lotus seed pot.The analysis was performed be using an ultraviolet spectrophotometer and a gel chromatograph.The average degree of polymerization and the degradation rate were used as reference indicators to evaluate the degradation effect of the reaction.The reaction condition was 10 mL high-polymer procyanidins solution as degradation raw material,solid acid addition amount of 0.05 g,reaction temperature of 70℃,and reaction time of 60 min.The results showed that the average polymerization degree of the high-polymer was decreased from 5.95 to 2.31 and the degradation rate could reach 61.18%.