Development of a ferrocenyl-based MIP in supercritical carbon dioxide: Towards an electrochemical sensor for bisphenol A

Rebocho, Sílvia; Cordas, Cristina M.; Viveiros, Raquel; Casimiro, Teresa

doi:10.1016/j.supflu.2018.01.006

Cited by 43 publications

(19 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…During the supercritical dyeing process, Sc-CO 2 fluid near or slightly above its critical points (T c = 31.10 °C, P c = 7.38 MPa) produced substantial polymer swelling because of the dissolution of CO 2 in polymers [18]. Therefore, Sc-CO 2 was used as a non-toxic solvent in extractions [22,23], separations [24], chemical reactions [25], and various other applications [26,27]. Furthermore, CO 2 gives superior heat transfer properties for near-critical operation.…”

Section: Introductionmentioning

confidence: 99%

Study on the Changes of Structures and Properties of PAN Fibers during the Cyclic Reaction in Supercritical Carbon Dioxide

et al. 2019

View full text Add to dashboard Cite

Thermal pre-oxidation of polyacrylonitrile (PAN) fibers is a time-consuming and energy-consuming step in the production of PAN-based carbon fibers. In this paper, the effect of temperature on the structures and properties of PAN fibers cyclized in the supercritical carbon dioxide (Sc-CO2) medium was studied. The thermal behaviors of the PAN fibers were investigated by Fourier transform infrared spectra (FT-IR), X-ray diffraction (XRD), differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). The cyclization reaction was sensitive to the heating temperature and gas atmosphere. The FT-IR results of the PAN fibers treated in the Sc-CO2 confirmed that the degree of cyclization increased with the increase of the cyclization temperature. Compared with the PAN fibers treated in the air, the PAN fibers treated in the Sc-CO2 showed a higher degree of cyclization even at the same temperature. These findings might be related to the osmotic action of Sc-CO2 causing the fibers to be further arranged in a regular manner, which was favorable for the cyclization reaction. Moreover, as one kind of high diffusion and high heat transfer media, the heat release during the cyclization of PAN fibers could be quickly removed by Sc-CO2, which achieved the progress of the rapid-entry cyclization reaction.

show abstract

Section: Introductionmentioning

confidence: 99%

Study on the Changes of Structures and Properties of PAN Fibers during the Cyclic Reaction in Supercritical Carbon Dioxide

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Upon polymerization, all the peaks broaden due to the randomly crosslinked structure of QPPMS, compared to the crystal texture of APPBr. In addition, a new peak appears at around 1731 cm −1 , corresponding to the stretching vibration of ester group in EGDMA . 13 C‐NMR was utilized to further characterize the chemical structure of QPPMS [Figure (d)].…”

Section: Resultsmentioning

confidence: 99%

Simultaneously enhanced conductivity and dimensional stability of AAEM by crosslinked polymer microsphere with dense carrier sites

Liu

Sun

2018

J of Applied Polymer Sci

View full text Add to dashboard Cite

The search for practically applicable alkaline anion exchange membrane (AAEM) has been of continuous interest during the past decades. One of the main obstacles for current AAEM lies in the trade‐off between hydroxide conductivity and dimensional stability. In this contribution, novel quaternary phosphonium polymer microsphere (QPPMS) with crosslinked structure and dense carrier sites is synthesized via precipitation polymerization method, followed by incorporating into chitosan (CS) to prepare composite membrane. Compared with CS, the incorporation of QPPMS endows composite membrane more than two times increased ion exchange capacity (IEC) from 0.39 to 1.2 mmol g−1, and highly enhanced water uptake from 90% to 124% with an enhancement of 37.8%. The constructed interfacial and intra‐QPPMS transfer pathways confer almost nine times augment of conductivity at 20°C under 98% relative humidity (RH). Most importantly, the increase of area swelling is limited to 25.0% (from 32% to 40%) due to the crosslinked structure of QPPMS, which is inconceivable for homogeneous membranes and inorganic filler‐based composite membranes. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46715.

show abstract

“…Commission regulation 2018/213 amended the previous UE regulation 10/2011 on the level of BPA in plastic food contact materials, reducing the specific migration limit from 0.6 to 0.05 mg BPA/kg [13]. Electrochemical sensors and liquid chromatography have increasingly been used in the last several years for the quantification of BPA in water and milk analysis [14,15]. High-performance liquid chromatography-tandem mass spectrometry methods can determine BPA, its major metabolite BPA-glucuronide, and eleven BPA analogues in human urine and blood serum [16,17].…”

Section: Introductionmentioning

confidence: 99%

Ion-Trap Mass Spectrometric Analysis of Bisphenol A Interactions With Titanium Dioxide Nanoparticles and Milk Proteins

2020

View full text Add to dashboard Cite

Quantitative analysis of endocrine-disrupting molecules such as bisphenol A (BPA) in freshwater to determine their widespread occurrence in environmental resources has been challenged by various adsorption and desorption processes. In this work, ion trap mass spectrometry (ITMS) analysis of BPA was aimed at studying its molecular interactions with titanium dioxide (TiO2) nanoparticles and milk whey proteins. Addition of sodium formate prevented TiO2 nanoparticles from sedimentation while enhancing the electrospray ionization (ESI) efficiency to produce an abundance of [BPA + Na]+ ions at m/z 251.0. More importantly, the ESI-ITMS instrument could operate properly during a direct infusion of nanoparticles up to 500 μg/mL without clogging the intake capillary. Milk protein adsorption of BPA could decrease the [BPA + Na]+ peak intensity significantly unless the proteins were partially removed by curdling to produce whey, which allowed BPA desorption during ESI for quantitative analysis by ITMS.

show abstract

Development of a ferrocenyl-based MIP in supercritical carbon dioxide: Towards an electrochemical sensor for bisphenol A

Cited by 43 publications

References 44 publications

Study on the Changes of Structures and Properties of PAN Fibers during the Cyclic Reaction in Supercritical Carbon Dioxide

Study on the Changes of Structures and Properties of PAN Fibers during the Cyclic Reaction in Supercritical Carbon Dioxide

Simultaneously enhanced conductivity and dimensional stability of AAEM by crosslinked polymer microsphere with dense carrier sites

Ion-Trap Mass Spectrometric Analysis of Bisphenol A Interactions With Titanium Dioxide Nanoparticles and Milk Proteins

Contact Info

Product

Resources

About