Photopolymerization of acrylamide as a new functionalization way of silica monoliths for hydrophilic interaction chromatography and coated silica capillaries for capillary electrophoresis

El-Debs, Racha; Marechal, A.; Dugas, Vincent; Demesmay, Claire

doi:10.1016/j.chroma.2013.12.038

Cited by 39 publications

(17 citation statements)

References 48 publications

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“…Silica/organic polymer composites have been recently promoted for the removal of Cr(VI) due to their performances proved by the mechanical resistance in the successive sorption/desorption cycles of heavy metal ions [39,41]. Composite ion exchangers, having silica as a core coated with organic polymer layers, are endowed with a fast uptake of the ionic solutes and mass transfer properties more favorable for high-performance chromatographic separations [42,43], but their sorption capacity for ionic species is low in many cases, because most of the composite is occupied by the inorganic component. To remediate this limitation, various organic ionic polymers have been lately generated inside the silica pores [44][45][46].…”

Section: Introductionmentioning

confidence: 99%

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Drăgan¹,

Humelnicu

2020

Molecules

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Removal of Cr(VI) from the environment represents a stringent issue because of its tremendous effects on living organisms. In this context, design of sorbents with high sorption capacity for Cr(VI) is getting a strong need. For this purpose, poly(vinylbenzyl chloride), impregnated into porous silica (PSi), was cross-linked with either N,N,N’,N’-tetramethyl-1,2-ethylenediamine (TEMED) or N,N,N’,N’-tetramethyl-1,3-propanediamine, followed by the reaction of the free -CH2Cl groups with N,N-diethyl-2-hydroxyethylamine to generate strong base anion exchangers (ANEX) inside the pores. The PSi/ANEX composite sorbents were deeply characterized by FTIR spectroscopy, SEM-energy dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), and water uptake. The sorption performances of composites against Cr(VI) were investigated as a function of pH, contact time, initial concentration of Cr(VI), and temperature. It was found that the cross-linker structure and the silica morphology are the key factors controlling the sorption capacity. The adsorption process was spontaneous and endothermic and well described by pseudo-second-order kinetic and Sips isotherm models. The maximum sorption capacity of 311.2 mg Cr(VI)/g sorbent was found for the composite prepared with mesoporous silica using TEMED as cross-linker. The PSi/ANEX composite sorbents represent an excellent alternative for the removal of Cr(VI) oxyanions, being endowed with fast kinetics, equilibrium in about 60 min, and a high level of reusability in successive sorption/desorption cycles.

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Section: Introductionmentioning

confidence: 99%

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Drăgan¹,

Humelnicu

2020

Molecules

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“…Photopolymerization was also used as covalent coating in order to obtain an acrylate polymer by the photo irradiation at 365 nm of silica capillaries, previously filled with an acrylamide (monomer) and benzoin methylether (photoinitiator) solution . The resulted coated capillary decreased EOF values in both acidic and alkaline mediums.…”

Section: Capillary Coatingsmentioning

confidence: 99%

Recent trends in capillary electrophoresis for complex samples analysis: A review

et al. 2017

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Recent trends in capillary electrophoresis for complex samples analysis: A reviewCE has been a continuously evolving analytical methodology since its first introduction in the 1980s of the last century. The development of new CE separation procedures, the coupling of these systems to more sensitive and versatile detection systems, and the advances in miniaturization technology have allowed the application of CE to the resolution of new and complex analytical problems, overcoming the traditional disadvantages associated with this method. In the present work, different recent trends in CE and their application to the determination of high complexity samples (as biological fluids, individual cells, etc.) will be reviewed: capillary modification by different types of coatings, microfluidic CE, and online microextraction CE. The main advantages and disadvantages of the different proposed approaches will be discussed with examples of most recent applications.

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“…On the basis of the nature of matrix chemistry, monolithic columns can be mainly categorized into three types: organic polymer‐based , inorganic silica‐based and organic‐silica hybrid monolithic columns . Recently, monolithic columns with mixed mode have been widely prepared and applied for different kinds of analytes in CEC (see Table ).…”

Section: Column Techniquementioning

confidence: 99%

Recent advances in microscale separation

et al. 2017

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Recent advances in microscale separationThis review focuses on the recent advances on microscale separation technology, particularly on the new development on column and detection technologies in electrophoretic and chromatographic separation modes (i.e., CE, CEC, cLC, etc.). Representative examples illustrate also applications on the small molecules, peptides, proteins, polysaccharides, chiral and so on. 246 relevant articles are cited covering the literature published

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Photopolymerization of acrylamide as a new functionalization way of silica monoliths for hydrophilic interaction chromatography and coated silica capillaries for capillary electrophoresis

Cited by 39 publications

References 48 publications

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Contribution of Cross-Linker and Silica Morphology on Cr(VI) Sorption Performances of Organic Anion Exchangers Embedded into Silica Pores

Recent trends in capillary electrophoresis for complex samples analysis: A review

Recent advances in microscale separation

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