title: In-situ graft-polymerization preparation of cation-exchange supermacroporous cryogel with sulfo groups in glass columns.
abstract: Graft polymerization of monomer chains with expected functional groups onto the matrix pore surfaces by initiator is an effective approach for introducing ion-exchange groups to cryogel matrix to get anion- or cation-exchange supermacroporous cryogels. In this work, a novel cation-exchange cryogel with sulfo binding groups was prepared by grafting of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPSA) onto polyacrylamide-based cryogels in glass columns. The grafting polymerization was achieved in an in-situ manner which was performed by pumping the initiator and the reactive solution of graft monomer with sulfo binding groups directly through a cryogel bed pre-produced in a glass column under frozen condition. The axial liquid dispersion characteristics within the monolithic cryogel beds before and after the in-situ polymerization were compared by measuring residence time distributions (RTDs) at various liquid flow rates using tracer pulse-response method. Microstructure morphology of pores within cryogels was analyzed by scanning electron microscopy (SEM). Chromatography of lysozyme was carried out to reveal the protein breakthrough and elution characteristics in the obtained cryogel beds.
authors.affiliation: State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China. yaokj@zjut.edu.cn
authors.forename: Kejian
authors.initials: K
authors.lastname: Yao
authors.forename: Junxian
authors.initials: J
authors.lastname: Yun
authors.forename: Shaochuan
authors.initials: S
authors.lastname: Shen
authors.forename: Fang
authors.initials: F
authors.lastname: Chen
mesh_terms: D002411:Cation Exchange Resins; D002852:Chromatography, Ion Exchange; D005782:Gels; D008855:Microscopy, Electron, Scanning; D011108:Polymers / Q000737:chemistry*
chemical_list: D002411:Cation Exchange Resins; D005782:Gels; D011108:Polymers