Preparation of Highly Cross-linked Hydrophilic Porous Microspheres Poly(N,N’-methylenebisacrylamide) and Poly(N,N’-methylenebisacrylamide-co-acrylic acid) with an Application on the Removal of Cadmium
作者：Wei Liu*, Xiaolian Zhu, Xinlin Yang, Ke Li, Zupeng Yang
關鍵字：Porous polymer; Microspheres; Adsorption; Distillation precipitation polymerization; Cadmium
論文來源：期刊
具體來源：Polym。 Adv. Technol. 29 (11), 2724-2734 (2018). DOI: 10.1002/pat.4371
發表時間：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.