关键词: 改性松香, 丙烯酰胺, 共聚物, 吸附, 热力学, 动力学, 青蒿素

Abstract: The copolymer was synthesized with modified rosin (ethylene glycol maleic rosinate acrylate,EGMRA) and acrylamide (AM) as the polymerization monomers by using suspension polymerization.The thermodynamic and kinetic characteristics of the copolymer for artemisinin were studied under static conditions.The control mechanism of the adsorption process was also investigated.The experimental results showed that the copolymer possessed excellent adsorption performance for artemisinin.The optimal static adsorption conditions were:4.0 mg/mL of artemisinin (mass concentration) in 60% alcohol solution (volume fraction) was adsorbed by 2040 mesh copolymer at 50 ℃ with oscillating at 110 rpm.The equilibrium adsorption time and the saturation adsorption capacity were 5 h and 39.78 mg/g dried copolymer,respectively.The equilibrium adsorption data can be well fitted to the Langmuir equation,the correalation coefficient was higher than 0.99.The pseudo firstorder equation can describe the adsorption process well.Film diffusion was the key step in this adsorption system.The diffusion coefficient (D) was calculated using Fick’s equation from the first portions of the adsorption curves,D=6.55×10^-9 cm²/s.