Oxygen permeability of teflon–PFA tubing

Giacobbe, F. W.

doi:10.1002/app.1990.070390508

Cited by 16 publications

(11 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, in this work we challenged ourselves to develop materials based on non-oxidisable fluorinated polymers and the luminescent molybdenum clusters. Importantly fluorinated polymers are well known to have good oxygen permeability and have been used for example, in oxygen sensing applications [16][17][18] and as an oxygen carrier in artificial blood [19].…”

Section: Introductionmentioning

confidence: 99%

Octahedral molybdenum cluster as a photoactive antimicrobial additive to a fluoroplastic

Vorotnikova

Alekseev

Vorotnikov

et al. 2019

Materials Science and Engineering: C

View full text Add to dashboard Cite

Finding methods that fight bacterial infection or contamination, while minimising our reliance on antibiotics is one of the most pressing needs of this century. Although the utilisation of UV-C light and strong oxidising agents, such as bleach, are still efficacious methods for eliminating bacterial surface contamination, both methods present severe health and/or environmental hazards. Materials with intrinsic photodynamic activity (i.e. a A c c e p t e d m a n u s c r i p t material's ability upon photoexcitation to convert molecular oxygen into reactive oxygen species such as singlet oxygen), which work with light within the visible photomagnetic spectrum could offer a significantly safer alternative. Here we present a new, bespoke molybdenum cluster (Bu4N)2[Mo6I8(n-C7F15COO)6], which is both efficient in the generation of singlet oxygen upon photoirradiation and compatible with the fluoropolymer (F23-L) known for its good oxygen permeability. Thus, (Bu4N)2[Mo6I8(n-C7F15COO)6]/F23-L mixtures have been solution-processed to give homogenous films of smooth and fibrous morphologies and which displayed high photoinduced antibacterial activity against four common pathogens under visible light irradiation. These materials thus have potential in applications ranging from antibacterial coatings to filtration membranes and air conditioners to prevent spread of bacterial infections.

show abstract

Section: Introductionmentioning

confidence: 99%

Octahedral molybdenum cluster as a photoactive antimicrobial additive to a fluoroplastic

Vorotnikova

Alekseev

Vorotnikov

et al. 2019

Materials Science and Engineering: C

View full text Add to dashboard Cite

show abstract

“…As mentioned above, we expect that polar sites are formed due to the leakage of O 2 into the reactor 13–15 along with the formation of free radicals due to crushing silica by the rocking action of the reactor. 16 Previous reports have shown that hot H 2 gas is capable of reducing oxidized carbon surfaces.…”

Section: Resultsmentioning

confidence: 93%

Improved Synthesis of Carbon-Clad Silica Stationary Phases

Ahmad

Carr

2013

Anal. Chem.

View full text Add to dashboard Cite

Previously we described a novel method for clading elemental carbon onto the surface of catalytically activated silica by a chemical vapor deposition (CVD) method using hexane as the carbon source and its use as a substitute for carbon clad zirconia.1,2 In that method, we showed that very close to exactly one uniform monolayer of Al (III) was deposited on the silica by a process analogous to precipitation from homogeneous solution in order to preclude pore blockage. The purpose of the Al(III) monolayer layer is to activate the surface for subsequent CVD of carbon. In this work, we present an improved procedure for preparing the carbon clad silica (denoted CCSi) phases along with a new column packing process. The new method yields CCSi phases having better efficiency, peak symmetry and higher retentivity compared to carbon clad zirconia. The enhancements were achieved by modifying the original procedure in three ways: first. the kinetics of the deposition of Al(III) were more stringently controlled, second the CVD chamber was flushed with a mixture of hydrogen and nitrogen gas during the carbon cladding process to minimize generation of polar sites by oxygen incorporation, and third the fine particles generated during the CVD process were exhaustively removed by flotation in an appropriate solvent.

show abstract

“…Here, the stainlesssteel tubing was replaced with highly hydrophobic perflouroalkoxy (PFA) tubing (5 ml, 2.5 m, 1.6 mm ID). Despite its oxygen permeability, 57 the material has already been used for successful synthesis of high order polymer nano-objects via PISA. 45,46 To obtain kinetic profiles of the continuous-flow ultrafast RAFT dispersion polymerisation experiments, transient kinetic studies were conducted for the chain extension of PDMAm 113 macro-CTA with 50, 100 and 200 equivalents of DAAm (Fig.…”

Section: Resultsmentioning

confidence: 99%