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

Abstract

An effective polymerization system was developed for the synthesis of highly cross‐linked 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 cross‐linker 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.

Preparation of Ethylene Glycol Dimethacrylate (EGDMA)-Based Terpolymer as Potential Sorbents for Pharmaceuticals Adsorption

“…To the best of our knowledge, the utilization of EGDMA as a crosslinking agent in AN-VBC copolymer system has never been reported before. It was widely reported that the most common crosslinkers that have been used in the polymeric system are DVB-80 [14,17,19,33] and N,N-methylenebisacrylamide [34][35][36][37]. EGDMA is a hydrophilic crosslinking agent with more polar characteristic compared to the DVB-80.…”

Effects of physicochemical properties of polyacrylamide (PAA) and (polydimethylsiloxane) PDMS on cardiac cell behavior

“…[62][63][64] The polymerization of acrylic acid with a water-soluble crosslinker, e.g., 1% N,N 0 methylenebisacrylamide in an aqueous solution, is a straightforward process. 65 PAM hydrogels can also be crosslinked by gamma irradiation. 66 Toxic compounds as crosslinking agents have adverse effects on the environment as well as undesirable reactions with the bioactive substances in the hydrogel matrix.…”

One-step synthesis and characterization of hydrophilic polymer microspheresimmobilized with polyphenylsulfone ultrafiltration membranes for protein rejection application

“…The particles are approximately spherical with a rough surface of diameter ~ 300 nm. The plausible reason is that during polymerization, the ability of the remaining C = C on the surface of P(MBAm-co-MAA) was not e cient enough from the solution to form bonds with newly formed oligomers, which results in the morphology of cauli ower-like particles with the rough surface(Liu et al 2007, Liu et al 2018b…”