Synthesis and characterization of new methacrylate‐type hydrogels containing 2‐tert‐butylamino ethyl groups for sorption purposes

Abstract

Crosslinked poly[2-(tert-butylamino)ethyl methacrylate] (PtBAEMA) hydrogels were synthesized by 60 Co-g-radiation-initiated simultaneous polymerization and crosslinking of 2-(tert-butylamino)ethyl methacrylate in bulk and in aqueous solutions. The results showed that the gelation percentage decreased with increasing water content. The structural and thermal characterizations of the hydrogels were accomplished with several techniques, including Fourier transform infrared spectroscopy, swelling measurements, thermogravimetry, and differential scanning calorimetry. The effects of time, pH, temperature, and ionic strength on the swelling behavior were also investigated. Swelling equilibrium was attained in 2-3 days. PtBAEMA hydrogels originally swelled to 350% (by volume) in deionized water, but this value reached 3000% around pH 2.0. PtBAEMA hydrogels were reversibly affected by the change in temperature within the temperature range of 4-708C. The swelling ratios of the gels decreased with increasing ionic strength. As a result, PtBAEMA hydrogels show stimuliresponsive properties depending on the characteristics of the environment, and they are being considered for adoption as some kind of carrying material for separation.

A novel thermo-responsive hydrogel based on salecan and poly(N-isopropylacrylamide): Synthesis and characterization

“…Hydrogels are hydrophilic polymer of three-dimensional networks able to swell in aqueous solutions without losing integrity of their structure [1][2][3]. They can be cast into practically any shape, size, or form [4] for different applications such as controlled drug release devices [5][6][7], tissue engineering scaffolds [8] and biosensors [9].…”

Antimicrobial Activity of Electrospun Polyvinyl Alcohol Nanofibers Filled with Poly[2-(tert-butylaminoethyl) Methacrylate]-Grafted Graphene Oxide Nanosheets

“…For PTA, two-step degradation was observed. The weight loss between 250 and 330 °C resulted from the loss of (tert-butylamino)ethyl side groups, and the weight loss between 390 and 440 °C corresponded to polymer main chain scission [ 37 ]. Similar degradation was also observed in GO- g -PTA-F and GO- g -PTA-A with increased temperature.…”

“…When GO was grafted with PTA via FRP, the absorbance bands at 3000–2800 cm −1 were detected with the asymmetric stretching of the alkyl groups (C–H of CH 3 and CH 2 ). Moreover, the absorbance bands at 1230 and1150 cm −1 were assigned to C–N bending signals of PTA [ 37 , 42 ]. Moreover, similar FTIR results were obtained in the GO-g-PTA-A powders.…”

Stimuli-Responsive Polymers Providing New Opportunities for Various Applications

“…Similarly, it triggers shrinkage in hydrogels containing cationic groups such as PDMA and PMEMA in the presence of salt (such as Na 2 SO 4 ) [27,[192][193][194][195]. While the presence of salts in polysulfobetaine-containing hydrogels triggers swelling, salts trigger swelling in polyamphoteric hydrogels and zwitterionic hydrogels consisting of anionic and cationic monomers [184,196].…”