Methacrylic acid functionalized CPS microspheres to adsorb shikimic acid. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Men, Jiying; Dong, Chengya; Shi, Hongxing; Hou, Biao; Wang, Ruixin; Cui, Jianlan; Wang, Limin
• Is Part Of: Journal of macromolecular science. Volume 57:Issue 1(2020)
• Page Start: 25
• Page End: 34
• Publication Date: 2020-01-02
• Subjects: Shikimic acid -- adsorption -- methacrylic acid -- kinetics -- isothermal model; Polymers -- Periodicals; Polymerization -- Periodicals; 547.7
• DOI: 10.1080/10601325.2019.1664913
• Languages: English
• ISSNs: 1060-1325

Abstract

Abstract: Chloromethylated cross-linked polystyrene (CMCPS) microsphere is hydroxylated, obtaining hydroxylated cross-linked polystyrene microsphere (CPS-OH). Methacrylic acid (MAA) is grafted on the surface of CPS-OH microspheres by cerium salt-hydroxyl group redox initiation system, obtaining graft-polymerization functional microsphere CPS-g-PMAA. The chemical structure and physicochemistry characters of CPS-g-PMAA are characterized with infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The adsorption performance of the grafted microspheres CPS-g-PMAA for shikimic acid was mainly investigated and the adsorption mechanism was explored. The experiment results show that for the graft-polymerization of MAA, the suitable concentration of MAA in solution is 3.2 mol/L, the optimal concentration of initiator cerium salt and catalyzer Sulfuric acid is 1.3 × 10 −2 and 0.3 1 mol/L, respectively, the appropriate temperature is 55 °C, and reaction time is 6 h, the grafting degree of PMAA can reach 43.3 g/100 g. The kinetics demonstrating adsorption kinetic of SA by CPS-g-PMAA is fitted PFO model in the first 50 min and is then fitted with the PSO model. The CPS-g-PMAA microsphere adsorbs SA via hydrogen bond interaction, the adsorption capacity reaches 92 mg/g in ethanol. The adsorption amount decreases with the increase of temperature, Freundlich isothermal model is fitted the adsorption experimental data.