胶原纤维吸附法纯化茶多酚的特性研究

研究吸附材料胶原纤维对茶多酚的吸附纯化特性。结果表明，该类吸附材料对茶多酚具有较好的吸附选择性、高吸附容量和良好的解吸性能，其吸附容量可达850mg/g。用50% 乙醇静态解吸后茶多酚回收率达85.46%，产品纯度为99% 以上。茶多酚在胶原纤维上的吸附平衡符合Freundlich 方程，吸附动力学符合Lagergren 拟二级速率方程。

Use of Collagen Fiber Adsorbent for the Purification of Tea Polyphenols

Collagen fiber adsorbent can adsorb tea polyphenol monomers to various degrees but its molecule has no groups that can be bound with caffeine. So, based on this principle tea polyphenols can be purified using collagen fiber adsorbent. The adsorption properties of collagen fiber adsorbent for the purification of tea polyphenols were investigated. The results indicated that the adsorbent had strong adsorption selectivity, high adsorption capacity (850 mg/g) and good desorption efficiency. After being eluted using 50% ethanol aqueous solution, the yield of tea polyphenols was 85.46%, and the purity was over 99%. The adsorption isotherms of tea polyphenols could be well described by the Freundlich equation; and the adsorption kinetics data were well fitted to pseudo-second-order rate model.