采用双酶法制备玉米多孔淀粉,以玉米多孔淀粉作为载体吸附茶多酚,研究玉米多孔淀粉吸附茶多酚的影响因素,正交实验优化吸附条件。探讨了吸附热力学规律,用Freundlich和Langmuir方程拟合并绘制等温吸附线,研究表明吸附过程比较符合Langmuir吸附规律（R2>0.99）。根据Langmuir等温吸附线计算微分吸附热,吸附热符合氢键键能范围,通过测定该复合物对DPPH与ABTS自由基的清除率,可见复合物仍保持较高的抗氧化能力,多孔淀粉复合后的茶多酚自氧化速度显著减慢。
Porous cornstarch was prepared by synergism of the α-amylase and gluamaylase and employed as a carrier to absorb tea polyphenol(TP), the factors affecting the adsorption were optimized by using the orthogonal experimental design. Studying on the adsorption thermodynamic characteristic and fitting the isotherms with Langmuir equation and Freundlich equation, it turned out that the adsorption isotherm was well represented by the Langmuir equation (R2>0.99). The different heat of adsorption according to the Langmuir adsorption isotherm conformed to the hydrogen bonding key range. Furthermore, the investigation on the antioxidative activity of the complex by measuring the scavenging capabilities on DPPH and ABTS free radicals showed that the complex possessed a good antioxidant activity rised with the concentration of TP, and the auto-oxidation rates of TP turned to a significant slower rate after TP was adsorbed on the porous starch.
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