Radiation Chemical Yields:<i>G</i>Values

Perera, M. C. S.; Hill, David J. T.

doi:10.1002/0471532053.bra017

Cited by 3 publications

(3 citation statements)

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“…The difference of 2.14 per 100 eV is, thus, the result of synergetic effects induced by water. G wet is higher than the literature values (1-4 per 100 eV) [78], which can be explained by the much larger inner surface area of the porous membrane compared to thin films and a facilitated release of HF due to water solvation effects. To gain further insights into the mode of action, irradiation studies in various aqueous systems were performed at 50 kGy (Figure 6b).…”

Section: 13 X For Peer Review 10 Of 22contrasting

confidence: 64%

“…We have limited the considered structures to mono-alkenes (e.g., 1l) since we are interested mainly in processes at the polymer surface. Dehydrofluorination of PVDF thin films during irradiation was studied by Makuuchi et al determining a radiation chemical yield of G(HF) = 1-4 per 100 eV, however, strongly depending on the HF extraction strategy due to follow-up reactions between HF and PVDF radicals [77,78]. Scheme 2.…”

Section: 13 X For Peer Review 10 Of 22mentioning

confidence: 99%

“…We have limited the considered structures to monoalkenes (e.g., 1l) since we are interested mainly in processes at the polymer surface. Dehydrofluorination of PVDF thin films during irradiation was studied by Makuuchi et al determining a radiation chemical yield of G(HF) = 1-4 per 100 eV, however, strongly depending on the HF extraction strategy due to follow-up reactions between HF and PVDF radicals [77,78]. Thus, dehydrofluorination is an essential part of PVDF radiation chemistry, and since it is easily accessible experimentally, irradiation studies were performed to determine the HF amount released depending on various parameters (Figure 6).…”

Section: 13 X For Peer Review 10 Of 22mentioning

confidence: 99%

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Radiation-Induced Graft Immobilization (RIGI): Covalent Binding of Non-Vinyl Compounds on Polymer Membranes

et al. 2021

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Radiation-induced graft immobilization (RIGI) is a novel method for the covalent binding of substances on polymeric materials without the use of additional chemicals. In contrast to the well-known radiation-induced graft polymerization (RIGP), RIGI can use non-vinyl compounds such as small and large functional molecules, hydrophilic polymers, or even enzymes. In a one-step electron-beam-based process, immobilization can be performed in a clean, fast, and continuous operation mode, as required for industrial applications. This study proposes a reaction mechanism using polyvinylidene fluoride (PVDF) and two small model molecules, glycine and taurine, in aqueous solution. Covalent coupling of single molecules is achieved by radical recombination and alkene addition reactions, with water radiolysis playing a crucial role in the formation of reactive solute species. Hydroxyl radicals contribute mainly to the immobilization, while solvated electrons and hydrogen radicals play a minor role. Release of fluoride is mainly induced by direct ionization of the polymer and supported by water. Hydrophobic chains attached to cations appear to enhance the covalent attachment of solutes to the polymer surface. Computational work is complemented by experimental studies, including X-ray photoelectron spectroscopy (XPS) and fluoride high-performance ion chromatography (HPIC).

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Section: 13 X For Peer Review 10 Of 22contrasting

confidence: 64%

Section: 13 X For Peer Review 10 Of 22mentioning

confidence: 99%

Section: 13 X For Peer Review 10 Of 22mentioning

confidence: 99%

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