Grafting of anion exchanging groups on SiO2/Si structures for anion detection in waters

Touzi, Hassen; Sakly, Nawfel; Kalfat, Rafik; Sfihi, H.; Jaffrézic‐Renault, Nicole; Rammah, Mohamed M.; Zarrouk, H.

doi:10.1016/s0925-4005(03)00578-1

Cited by 16 publications

(12 citation statements)

References 30 publications

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“…The design of sensitive ISFET chemical sensors is the subject of active research in the fields of supramolecular chemistry. The aim is to select complexing agents that allow specific recognition of iron(III) species [22][23][24], and insurface immobilization processes to produce an ISFET surface that will be durably sensitized by strong immobilization by means of chemical grafting [25].…”

Section: Introductionmentioning

confidence: 99%

Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Mefteh

Touzi

Chevalier

et al. 2014

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Mefteh

Touzi

Chevalier

et al. 2014

Sensors and Actuators B: Chemical

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“…Indeed, various functional alkylalkoxysilane and chlorosilane have been used whereby the hydrolysis of the alkoxy (or chloride) groups and subsequent reaction with silanols on the surface of the silica results in stable siloxane bonds. Recent examples of such silane coupling agents used in this way include: γ-aminopropyltriethoxysilane [2] vinyltriethoxysilane [3], 3-methacryloylpropyltrimethoxysilane [4], chloroalkylsilane [5], 3-glyci-doxypropyldimethylethoxysilane [6], 3-chlorodimethylsilylpropyl 2-bromoisobutyrate [7], vinyltriethoxysilane [3], 3-triethoxysilylpropylisocyanate [8], 3-(2-aminoethyl-amino) propyltrimethoxysilane [9], 3-methacryloxypropyltrimethoxysilane [10], 3-aminopropyltriethoxysilane and 3-glycidoxypropyltrimethoxysilane [11] and (11′-chlorodimethylsilylundecyl)-2-chloro-2-phenylacetate [12]. It is apparent that many of these organosilanes are specific to a particular system and are not readily available.…”

Section: Introductionmentioning

confidence: 99%

Novel Grafting onto Silica via Aldehyde Functionality

Congiusta

Granleese

Graiver

et al. 2009

Silicon

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Silica-bound aldehyde functional silane was used as a versatile bridge to attach porphyrin to the surface of silica and as a surface-bound free radical initiator to yield PMMA brushes. The aldehyde functionality is obtained by a simple ozonolysis of the surface-bound allylsilane, whereby the double bonds are oxidized in high yield to the desired aldehyde. Mono-amino porphyrin was attached to the silica surface under mild conditions via Schiff-base linkages, whilst anchored PMMA was obtained by free radical initiation using an aldehyde/redox free radical polymerization. FTIR and TGA data were used to determine and characterize the attachment to the silica surface.

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“…Treatment of substrates by various organosilanes has been widely investigated in the literature [48][49][50][51][52][53][54][55] for different purposes. One organosilane was utilised in the oil field in order to increase the adsorption of SI as a fixing agent [10,11].…”

Section: Making Quartz Reactive With Npsmentioning

confidence: 99%

Carbon Nanotubes: A New Methodology for Enhanced Squeeze Lifetime CNTs

Ghorbani¹,

Wilson²,

Kapur³

et al. 2014

SPE International Oilfield Scale Conference and Exhibition

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A new potential application of nanotechnology for mineral scale prevention in the oil and gas industry is presented. In current squeeze treatments, in which scale inhibitors are squeezed into wells to adsorb or precipitate onto rock surfaces for later release, a large proportion of the injected inhibitor does not adsorb and is therefore returned very quickly from the reservoir upon well re-start. Here it is demonstrated that nano-particles have the potential to enhance squeeze lifetime by greatly increasing the adsorption of inhibitors within the formation. An extensive literature review is presented, exploring the potential for using nano-scale materials in squeeze treatments. One of the observations from scale inhibitor squeezes into sandstone reservoirs is the apparent lack of suitable surfaces available for adsorption. The main constituent of sandstones, quartz, has a very low ability to adsorb inhibitor (1 mg/I). Given this, research using nanotechnology was targeted towards enhancing the available sites for scale inhibitor adsorption within the near wellbore. Specifically, research was undertaken to examine the potential benefits of using carbon nanotubes in a process called Nanotechnology Assisted Squeeze Treatment (NAST). The process involves carbon nanotubes adsorbing and permanently modifying the near wellbore with scale inhibitors subsequently adsorbing onto the nanotubes. This process was observed to be significantly higher than a non-modified near wellbore surface, with a maximum adsorption of more than 85 and 160mg/g onto the nanotubes in solution of distilled water (DW) and CaC12 in DW; respectively, compared to 1 mg/g directly onto the rock. Coreflood tests comparing the NAST procedure with a simplified standard coreflood show the potential for improvement of the squeeze lifetime. IntroductionInorganic scale precipitation, including formation of CaCO 3 , MgCO 3 , FeCO 3 , BaSO 4 , CaSO 4 , SrSO 4 , etc. occurs when two incompatible brines are mixed or where the conditions (i.e. temperature and pressure) in a system are changed and there is a resulting change in the solubility of certain salts. This can cause blockage of the oil path and damage to the production system. A chemical squeeze treatment is used to pump scale inhibitor (SI) downhole to adsorb or precipitate onto the formation rock. The aim is to establish a downhole reserve of SI from which subsequent desorption or release maintains a concentration of SI within the reservoir sufficient to prevent scale formation. The lifetime of the squeeze treatment is defined as the time when the return Scale Inhibitor (SI) concentration falls below the Minimum Inhibitor Concentration (MIC), which is typically 1-20 ppm depending on the reservoir conditions and SI properties. At this point the well needs to be re-squeezed. Regardless of whether the SI adsorbs or precipitates, the squeeze treatment process is expensive due to the squeeze implementation, chemical inhibitor costs and most importantly because of production losses/deferred during th...

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Grafting of anion exchanging groups on SiO2/Si structures for anion detection in waters

Cited by 16 publications

References 30 publications

Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Novel Grafting onto Silica via Aldehyde Functionality

Carbon Nanotubes: A New Methodology for Enhanced Squeeze Lifetime CNTs

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