Peroxidic perfluoropolyether for the covalent binding of perfluoropolyether chains on carbon black surface

Sansotera, Maurizio; Navarrini, W.; Gola, Massimo; Bianchi, Claudia L.; Wormald, Philip; Famulari, Antonino; Avataneo, M.

doi:10.1016/j.jfluchem.2011.07.018

Cited by 22 publications

(14 citation statements)

References 17 publications

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“…Another pathway relies on the capability of the oxyradical C7 generated in Equation ( 5) to undergo monomolecular β-scission by eliminating fluorofosgene (COF 2 ) and giving rise to a C6 perfluoroalkyl radical [112][113][114] (Equation ( 9)).…”

Section: Other Photocatalystsmentioning

confidence: 99%

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

et al. 2021

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PFAS substances, which have been under investigation in recent years, are certainly some of the most critical emerging contaminants. Their presence in drinking water, correlated with diseases, is consistently being confirmed by scientific studies in the academic and health sectors. With the aim of developing new technologies to mitigate the water contamination problem, research activity based on advanced oxidation processes for PFAS dealkylation and subsequent mineralization is active. While UV radiation could be directly employed for decontamination, there are nevertheless considerable problems regarding its use, even from a large-scale perspective. In contrast, the use of cheap, robust, and green photocatalytic materials active under near UV-visible radiation shows interesting prospects. In this paper we take stock of the health problems related to PFAS, and then provide an update on strategies based on the use of photocatalysts and the latest findings regarding reaction mechanisms. Finally, we detail some brief considerations in relation to the economic aspects of possible solutions.

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Section: Other Photocatalystsmentioning

confidence: 99%

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

et al. 2021

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“…Moreover, in these conditions the catalyst deactivation due to fluoride ions is mostly inhibited [27]. As often happens, a more complete understanding of a reaction mechanism gives more options in the utility of the reaction under study [46,47]. In particular, in the photocatalytic oxidation of PFOA a new chemical route has been identified for the synthesis of carbonyl difluoride, COF 2 .…”

Section: Page 4 Of 29mentioning

confidence: 99%

The effect of oxygen in the photocatalytic oxidation pathways of perfluorooctanoic acid

Sansotera

Persico

Rizzi

et al. 2015

Journal of Fluorine Chemistry

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“…The thermal-induced homolytic cleavage of O–O bonds in PFPE peroxides synthesizes highly reactive radicals with PFPE structures, which can directly bond to carbonaceous structures without thermally and chemically detrimental spacers [ 27 , 41 , 42 , 43 ]. In general, the chemical treatments with PFPE peroxides lead to the formation of non-peroxidic PFPE layers covalently linked to the carbon-based surface (see Figure 1 ).…”

Section: Resultsmentioning

confidence: 99%

Comparison of Branched and Linear Perfluoropolyether Chains Functionalization on Hydrophobic, Morphological and Conductive Properties of Multi-Walled Carbon Nanotubes

et al. 2018

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The functionalization of multi-walled carbon nanotubes (MW-CNTs) was obtained by generating reactive perfluoropolyether (PFPE) radicals that can covalently bond to MW-CNTs’ surface. Branched and linear PFPE peroxides with equivalent molecular weights of 1275 and 1200 amu, respectively, have been thermally decomposed for the production of PFPE radicals. The functionalization with PFPE chains has changed the wettability of MW-CNTs, which switched their behavior from hydrophilic to super-hydrophobic. The low surface energy properties of PFPEs have been transferred to MW-CNTs surface and branched units with trifluoromethyl groups, CF3, have conferred higher hydrophobicity than linear units. Porosimetry discriminated the effects of PFPE functionalization on meso-porosity and macro-porosity. It has been observed that reactive sites located in MW-CNTs mesopores have been intensively functionalized by branched PFPE peroxide due to its low average molecular weight. Conductivity measurements at different applied pressures have showed that the covalent linkage of PFPE chains, branched as well as linear, weakly modified the electrical conductivity of MW-CNTs. The decomposed portions of PFPE residues, the PFPE chains bonded on carbon nanotubes, and the PFPE fluids obtained by homo-coupling side-reactions were evaluated by mass balances. PFPE-modified MW-CNTs have been characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), static contact angle (SCA), surface area, and porosity measurements.

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Peroxidic perfluoropolyether for the covalent binding of perfluoropolyether chains on carbon black surface

Cited by 22 publications

References 17 publications

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

Light-Induced Advanced Oxidation Processes as PFAS Remediation Methods: A Review

The effect of oxygen in the photocatalytic oxidation pathways of perfluorooctanoic acid

Comparison of Branched and Linear Perfluoropolyether Chains Functionalization on Hydrophobic, Morphological and Conductive Properties of Multi-Walled Carbon Nanotubes

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