writer：Wei Liu*, Xiaolian Zhu, Xinlin Yang, Ke Li, Zupeng Yang
keywords：Porous polymer; Microspheres; Adsorption; Distillation precipitation polymerization; Cadmium
source：期刊
specific source：Polym。 Adv. Technol. 29 (11), 2724-2734 (2018). DOI: 10.1002/pat.4371
Issue time：2018年

An effective polymerization system was developed for the synthesis of highly-crosslinked hydrophilic monodispersed microspheres with both the micropores

and mesopores inside. A series of poly(N,N’-methylenebisacrylamide) (PMBA)

microspheres with the diameters ranging from 100 to 300 nm were synthesized by

distillation precipitation polymerization with N,N-dimethylacetamide (DMAC) as the

porogen, acetonitrile as the solvent, and MBA as the crosslinker and monomer. The

particle size, morphology and porosity varied according to the variation of the DMAC

content. The porosity was determined by physical adsorption of nitrogen, and reached

the maximum at 7.5 vol% of DMAC with the specific surface area at 135.8 m2·g-1,

and the total pore volume at 0.43 cm3·g-1. The porous and hydrophilic microspheres

showed excellent swelling property in water and adsorption property for the Cd(II) in

aqueous solution. Meanwhile, carboxylic groups were incorporated into the porous

microspheres to achieve porous poly(N,N’-methylenebisacrylamide-co-acrylic acid)

(P(MBA-co-AA)-P), which exhibited obvious synergies of the pores and functional

groups on the adsorption and provided a perspective application of the Cd (II)

removal.