Sythesis of Molecularly Imprinted Polymers for the Binding and Recognition of Nonylphenol

Abstract

In this paper, molecularly imprinted polymers with high selectivity for nonylphenol (NP) were synthesized by sol-gel process using 4-vinylpyridine (4-Vpy) as functional monomer, ethyleneglycol dimethacrylate as crosslinker (EGDMA), azobisisobutyronitrile (AIBN) as initiator, NP as template molecules. The performance of imprinted material was evaluated by adsorption kinetic, adsorption isotherm and adsorption selectivity. The results indicated that this material had not only binding properties but also high selectivity to the template molecule, which had good application prospects in the selective enrichment and separation of NP for pretreatment and analysis of complex environmental samples.

Molecularly Imprinted Polymer Colloids Synthesized by Miniemulsion Polymerization for Recognition and Separation of Nonylphenol

“…The fits of Langmuir and Scatchard both provided an average value of Q max of 174 ± 25 mg·g –1 , i.e., 0.8 mmol·g –1 (Table ). This value, far beyond values previously reported in other studies , about NP adsorption onto P­(4-VP)-based MIPs (7 < Q max < 50 mg·g –1 ), confirms the interest of the present colloidal MIPs. The separation factor R L ranges from 0.87 to 0.15, meaning that the adsorption of NP is favored in the present range of the concentration.…”

“…Table 2). This value, far beyond values previously reported in other studies 41,45 [80][81][82] Here, the interaction of NP with imprinted and non-imprinted polymer particles was investigated in mixture of ethanol/water 50/50 (v/v) at 25°C. ITC allows to measure the enthalpic contribution of NP binding and the association constant (K A ).…”

“…36 On the other hand, few studies have been devoted to the design of MIPs for the specific and selective adsorption of nonylphenol (NP) as organic contaminant. 11,[37][38][39][40][41][42][43][44][45][46][47][48][49][50][51] Their syntheses were performed by precipitation polymerization or surface imprinting in organic solvents such as toluene, acetonitrile or dimethylformamide.…”

“…Miniemulsion polymerization was successfully carried out to synthesize MIPs targeting specific recognition for drugs, − proteins, − and pollutants or as nanoreactor in catalyzed multicomponent reactions . On the contrary, few studies have been devoted to the design of MIPs for the specific and selective adsorption of nonylphenol (NP) as an organic contaminant. ,− Their syntheses were performed by precipitation polymerization or surface imprinting in organic solvents such as toluene, acetonitrile, or dimethylformamide.…”