Inverse gas chromatographic characterization of functionalized polysiloxanes. Relevance to sensors technology

Demathieu, Caroline; Chehimi, Mohamed M.; Lipskier, Jean-François

doi:10.1016/s0925-4005(99)00357-3

Cited by 33 publications

(20 citation statements)

References 37 publications

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“…The polymer solubility values reported in Table II have been determined by C. Demathieu [10]. The value of b which quantifies the polymer hydrogen bond acidity is preponderant; this means that GLP can strongly interact with basic solutes.…”

Section: Sensitive Coatingmentioning

confidence: 99%

Detection of GB and DMMP Vapors by Love Wave Acoustic Sensors Using Strong Acidic Fluoride Polymers

et al. 2004

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In this paper, we present a comparative study of GB and DMMP vapor detection using Love wave devices. Acoustic sensors are optimized versus the mass loading effect according to theoretical results, and a specific sensitive coating based on polysiloxane polymer is used to ensure selectivity. Experimental results allow us to compare the interactions between the coating and both gases. An estimation of the diffusion coefficient of each gas (GB and DMMP) was performed and we linked the dynamic of the responses with the sorption kinetics.

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Section: Sensitive Coatingmentioning

confidence: 99%

Detection of GB and DMMP Vapors by Love Wave Acoustic Sensors Using Strong Acidic Fluoride Polymers

et al. 2004

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“…QF-1 is known to interact with ester groups. 48 This was true with acetates and even stronger with TFA and PFP. QF-1 also gives good separations for the three esters.…”

Section: Group Effects On Enthalpy and Entropy Of Transfermentioning

confidence: 94%

Entropy−Enthalpy Compensations in Solutions of Dual Character Molecules with Polymeric Chromatographic Liquid Phases

2005

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Careful gas chromatographic studies provide thermodynamic data for insights into solution processes in nonvolatile solvents. Using 24 solutes and five stationary phases, several entropy-enthalpy compensation effects in the thermodynamics of solution were identified. Despite solute structure differences, when excess enthalpy and entropy of solutions were examined, entropy-enthalpy compensation effects were found in solvents dominated by single types of interaction: squalane and, to some extent, methoxy poly(ethylene oxide) (PEO). The main reason for the absence of linearity in other solvents is pure solute state interactions in the reference state and the multicharacter nature of solvents. In this study, consideration of solute state interactions was removed through examination of the thermodynamics of transfer between solvent pairs. It was found that solute transfers from squalane to poly[methyl(trifluoropropyl)siloxane] (QF-1) and to poly(methylphenyl) (DC-550) also gave linear relationships. The former system contains a second correlation for ester type solutes. The transfer data for squalane to poly(methylsiloxane) (DC-200) had smaller ranges and were more scattered. The effects of derivatizing groups on the transfer enthalpy and entropy were treated as a summation of hydrocarbon cores with the derivative groups. The group properties of transfer then also show entropy-enthalpy compensation effects. Many solution effects could be explained on the basis of solvent composition and local interactions with solutes.

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“…In the case of chloroform and dichloroethane vapors, the lower frequency response may be due to much weaker hydrogen-bond were formed between the halogen atom of the analyte molecules and the functionalized hydroxyl-group of the siloxane polymer. Namely, both chloroform and dichloroethane are weaker hydrogen-bond basic molecules according to the LSERs equations [1,2,[13][14][15][16]19], and they could not be interacted with the functional polymer coating efficiently, and cannot formed a strong hydrogen bond with them perfectly. Regarding the relatively low sensitivities to toluene, hexane and benzene vapors, there may be attributed to the relatively weak monolayer interactions formed by dipole-induced interaction.…”

Section: Sensitivitymentioning

confidence: 99%

“…Obviously, it is generally believed that hydrogen-bond acidity can be obtained by incorporating fluorinated alcohols, phenols or fluorinated phenols groups into the polymer molecular backbones, which maximize the hydrogen-bond acidity of the hydroxyl-group through the electron-withdrawing effect of the fluorine atoms or aromatic rings. Furthermore, according to the Linear Solvation Energy Relationships (LSERs) [1,2,[13][14][15][16]19], a fluorinated alcohol is intrinsically a better hydrogen-bond acid and becomes even better if introduced into a phenol molecule. Therefore, hexafluoroisopropanol-substituted-phenol groups functionalized Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

A new siloxane polymer for chemical vapor sensor

Huang

Jiang

et al. 2010

Sensors and Actuators B: Chemical

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Inverse gas chromatographic characterization of functionalized polysiloxanes. Relevance to sensors technology

Cited by 33 publications

References 37 publications

Detection of GB and DMMP Vapors by Love Wave Acoustic Sensors Using Strong Acidic Fluoride Polymers

Detection of GB and DMMP Vapors by Love Wave Acoustic Sensors Using Strong Acidic Fluoride Polymers

Entropy−Enthalpy Compensations in Solutions of Dual Character Molecules with Polymeric Chromatographic Liquid Phases

A new siloxane polymer for chemical vapor sensor

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