Preparation and Characterization of Molecularly Imprinted Polymer as SPE Sorbent for Melamine Isolation

Yusof, Nor Azah; Rahman, Siti Khadijah Ab.; Hussein, Mohd Zobir; Ibrahim, Nor Azowa

doi:10.3390/polym5041215

Cited by 84 publications

(50 citation statements)

References 18 publications

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“…The k' value for Py-IP is 2.2617, which represents a good selectivity towards pyrogallol (Yusof et al, 2013;Liu et al, 2004). This shows that the binding cavities has successfully been imprinted in Py-IP.…”

Section: Selectivity Studymentioning

confidence: 77%

“…It was determined by the value of relative selectivity (k'). The value of k' must >1 to consider the imprinted polymer to be acceptable and to have a good selectivity towards the target molecule (Yusof et al, 2013;Liu et al, 2004). Results showed that the value of k' for Py-IP was >1, which indicated that Py-IP was successfully imprinted and had a good selectivity towards Py.…”

Section: Discussionmentioning

confidence: 99%

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Isotherm Studies of Pyrogallol-imprinted Polymers via Precipitation Polymerization

Othman

Yusof

Daik³

et al. 2017

IJTech

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Molecularly imprinted polymers (MIPs) have been the most convenient and selected methods in detection and extraction for many types of specific targets in various fields. MIPs were prepared by mixing template molecule with functional monomer in the presence of cross-linker, solvent and initiator. The selectivity of MIPs is strongly influenced by the types of functional monomer, solvent and polymerization process used. Pyrogallol-imprinted polymer (Py-IP) and nonimprinted polymer (NIP) were synthesized via precipitation polymerization using 4-vinylpyridine (4-VP), divinylbenzene (DVB) and azobisisobutyronitrile (AIBN) as functional monomer, cross-linker and initiator, respectively. Pyrogallol (Py) was used as a target molecule. The synthesized polymers were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and UV-Visible Spectroscopy (UV-Vis). In this study, adsorption capacity was measured by the dosage effect, contact time and selectivity study. Results showed that maximum adsorption capacity by Py-IP is above 50%. The Selectivity study shows that k' is >1, which indicates that Py-IP has a good selectivity towards pyrogallol. Therefore, it has a good potential to be used as an adsorbent.

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Section: Selectivity Studymentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Isotherm Studies of Pyrogallol-imprinted Polymers via Precipitation Polymerization

Othman

Yusof

Daik³

et al. 2017

IJTech

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“…The two obvious bands appearing at 2870 and 2920 cm −1 due to the C‐H stretching vibrations also confirm the functionalization of the modified Fe 3 O 4 @SiO 2 with ClPTMS, which was designated as Fe 3 O 4 @SiO 2 @CPTMS (Figure c) . In the FT‐IR spectrum of Fe 3 O 4 @SiO 2 @PTMS@Melamine, two new peaks appeared at 1625 and 1541 cm −1 are due to melamine C=N stretching and N‐C‐N bending vibrations (Figure d) . Based on these bands, successful grafting of melamine onto the Fe 3 O 4 @SiO 2 @CPTMS nanoparticles surface is concluded.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of a new schiff base oxovanadium complex with melamine and 2‐hydroxynaphtaldehyde on modified magnetic nanoparticles as catalyst for allyl alcohols and olefins epoxidation

Farzaneh

Asgharpour

2019

Applied Organom Chemis

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A new magnetically recoverable nanocatalyst designated as Fe3O4@SiO2@PTMS@Mel‐Naph‐VOcomplex was synthesize by covalent binding of a Schiff base ligand derived from melamine and 2‐hydroxy1naphtaldehyde on the surface of silica coated iron oxide magnetic nanoparticles followed by complexation with VO (acac)2. Characterization of the prepared nanocatalyst was accomplished with FT‐IR, XRD, SEM, HRTEM, VSM and atomic absorption techniques. It was found that the epoxidation of geraniol, trans‐2‐hexen‐1‐ol, 1‐octen‐3‐ol, norbornene, and cyclooctene is highly selective, affording quantitative yields of the corresponding epoxides with tert‐butyl hydroperoxide (TBHP) using Fe3O4@SiO2@Mel‐Naph‐VOcomplex as catalyst. High reaction yields, short reaction times, simple experimental and work up procedure, catalyst stability and excellent reusability even after five‐cycles of usage in the case of geraniol are some advantages of this research.

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“…The resulting MIP serves high specificity and selectivity for the template, and is favorable towards mechanical, thermal, and chemical stabilities [1,2]. It is clearly suitable for various applications, such as in separations [3], chemical sensors [4], selective catalysis [5], and hybrid membranes [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of RAFT Agent on the Selective Approach of Molecularly Imprinted Polymers

2015

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Two types of reversible addition-fragmentation chain transfer molecularly imprinted polymers (RAFT-MIPs) were synthesized using different monomers, which were methacrylic acid functionalized β-cyclodextrin (MAA-β-CD) and 2-hydroxyethyl methacrylate functionalized β-cyclodextrin (HEMA-β-CD), via reversible addition-fragmentation chain transfer (RAFT) polymerization, and were represented as RAFT-MIP(MAA-β-CD) and RAFT-MIP(HEMA-β-CD), respectively. Both RAFT-MIPs were systematically characterized using Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), Brunauer-Emmett-Teller (BET), and rebinding experimental study. The results were compared with MIPs synthesized via the traditional radical polymerization (TRP) process, and were represented as MIP(MAA-β-CD) and MIP(HEMA-β-CD). Morphology results show that RAFT-MIP(MAA-β-CD) has a slightly spherical feature with a sponge-like form, while RAFT-MIP(HEMA-β-CD) has a compact surface. BET results show that the surface area of RAFT-MIP(MAA-β-CD) is higher than MIP(MAA-β-CD), while the RAFT-MIP(HEMA-β-CD) surface area is lower than that of MIP(HEMA-β-CD). Rebinding experiments indicate that the RAFT agent increased the binding capacity of RAFT-MIP(MAA-β-CD), but not of RAFT-MIP(HEMA-β-CD), which proves that a RAFT OPEN ACCESSPolymers 2015, 7 485 agent does not always improve the recognition affinity and selective adsorption of MIPs. The usability of a RAFT agent depends on the monomer used to generate potential MIPs.

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Preparation and Characterization of Molecularly Imprinted Polymer as SPE Sorbent for Melamine Isolation

Cited by 84 publications

References 18 publications

Isotherm Studies of Pyrogallol-imprinted Polymers via Precipitation Polymerization

Isotherm Studies of Pyrogallol-imprinted Polymers via Precipitation Polymerization

Synthesis of a new schiff base oxovanadium complex with melamine and 2‐hydroxynaphtaldehyde on modified magnetic nanoparticles as catalyst for allyl alcohols and olefins epoxidation

Effects of RAFT Agent on the Selective Approach of Molecularly Imprinted Polymers

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