Application of ion-imprinted polymer synthesized by precipitation polymerization as an efficient and selective sorbent for separation and pre-concentration of chromium ions from some real samples

Study on Synthesis and Adsorption Properties of ReO4– Ion-Imprinted Polymer

“… 31 , 32 However, there was no suitable cross-linker to meet the demand because all of the frequently-used cross-linker could not resolve in water with so high solubility. 33 , 34 Besides, the accurate separation could not be ensured because the assembly among target ion and functional groups of monomers was mainly realized by the hydrogen bond, but the existence of water would weaken the assembly by competing functional groups with the target ion. 35 , 36 Thus, how to introduce a cross-linker with a high feed ratio and how to improve the selectivity would be key problems of this work.…”

“…Besides, based on the special preparation process also, the IP had advantages of the long-term stability, structural presupposition, and wide applicability − and had become a research hotspot in the field of separation and purification . As a representative high-level adsorption material with good selectivity, the ion imprinted polymer (IIP) is a developed separation material on the basis of the molecular imprinting technology recently. − For the preparation process is simple and the selectivity for specific ions is excellent and adsorption capacity is large, the material has developed rapidly in the field of adsorption and has been widely used. , At present, in the process of synthesizing IIP, due to the few types of traditional functional monomers, the synthesized IIP has a low binding capacity, performance does not meet the ideal requirements, and postprocessing is relatively complicated. , In the process of using an IIP, there are some problems such as low adsorption capacity, weak recognition ability, difficult desorption, and poor reusability which are caused by problems in the selection and dosage of a cross-linking agent, functional monomer, solvent, and so forth. , Therefore, the challenge in the future is how to choose a suitable imprinting system and synthesize an IIP with excellent adsorption and desorption performance, strong recognition ability, and good reusability through simple operations. , An IIP was generally required to have a high degree of cross-linking (>80%) to ensure the strong rigidity to maintain the shape and integrity of the imprinted cavities. − Because ReO 4 – was a water-soluble target, an IIP focused on it should be prepared in an aqueous solution. , However, there was no suitable cross-linker to meet the demand because all of the frequently-used cross-linker could not resolve in water with so high solubility. , Besides, the accurate separation could not be ensured because the assembly among target ion and functional groups of monomers was mainly realized by the hydrogen bond, but the existence of water would weaken the assembly by competing functional groups with the target ion. , Thus, how to introduce a cross-linker with a high feed ratio and how to improve the selectivity would be key problems of this work…”

Co-precipitation polymerization of dual functional monomers and polystyrene-co-divinylbenzene for ciprofloxacin imprinted polymer preparation

“…The results indicated that the imprinted polymer was remained stable aer template elimination process using acid solution. 13,36,37 Thermogravimetric analysis. The TGA curve and dTG plot of MIP4 and NIP4 are shown in Fig.…”

Fabrication of High-Recognition Self-Driven Protein Surface Imprinted Mesoporous N-Doped Carbon Fiber

“…Compared with biological macromolecules, the research and development of small molecule imprinting technology has been more flourishing. − The properties of biomacromolecules, such as large size, flexible conformation, and environmental sensitivity, that make the application of MIT in the field of biological macromolecule separation still face great challenges . Researchers have developed surface imprinted materials to overcome these problems. − Kotyrba and co-workers developed silica nanoparticle supported imprinted polymers for selective lysozyme (Lyz) recognition, and the highest binding capacity was 58.82 mg/g with imprinting factors (IF) of 2.74 .…”