Dissolution of a surfactant-containing active porous material

Brielles, Nelly; Chantraine, Florence; Viana, Marylène; Chulia, Dominique; Branlard, Paul; Rubinstenn, Gilles; Lequeux, François; Mondain‐Monval, Olivier

doi:10.1016/j.jcis.2008.07.060

Cited by 15 publications

(7 citation statements)

References 37 publications

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“…The imbibition of SDS aqueous solution into hydrophobic capillaries may differ significantly from that of pure liquids. ,,− As the filling proceeds, the newly formed liquid/solid interface rapidly adsorbs SDS molecules from the liquid/vapor interface (surface adsorption of SDS is fast especially in such confined geometries). This causes a significant decrease of SDS concentration near the advancing liquid front considering the large specific area of nanoporous films, and consequently, the capillary driving force decreases and even vanishes until the loss of surfactant at the advancing liquid front is compensated by diffusion transport from deeper liquid regions. A rigorous theoretical framework for the imbibition of SDS aqueous solution into hydrophobic capillaries thus should involve the coupling among the dynamic equation of capillary rising, the adsorption/desorption kinetics, and the diffusion equation .…”

Section: Resultsmentioning

confidence: 99%

Physisorption of SDS in a Hydrocarbon Nanoporous Polymer

Li¹,

Wang²,

Vigild³

et al. 2010

Langmuir

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Surface modification of nanoporous 1,2-polybutadiene of pore diameter approximately 15 nm was accomplished by physisorption of sodium dodecyl sulfate (SDS) in water. Loading of the aqueous solution and the accompanying physisorption of SDS into the hydrophobic nanoporous films were investigated in a wide range of concentrations. The loading showed varying dependence on the SDS concentration. No loading was observed for SDS concentrations below 4.0 mM. At concentrations above 5.0 mM, the initial part of loading showed a linear dependence on the square root of time, which can be interpreted as diffusion-controlled dynamics. Both the specific equilibrium loading and the final SDS adsorption reached plateau values at concentrations above 6.8 mM. The infiltration of SDS into the nanoporous film was mainly followed by gravimetry and for a few samples confirmed by X-ray photoelectron spectroscopy (XPS). The SDS adsorption isotherm can be well described by the Langmuir model, consistent with a monolayer adsorption onto the pore walls. The surface modified by the surfactant clearly showed water wettability, in contrast to the original hydrophobic nanoporous 1,2-PB. We also looked at the release process of SDS out of the nanopores in the presence of excess of water or methanol. A discussion of the very different time scales of release in the two media is presented at the end of the paper.

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Section: Resultsmentioning

confidence: 99%

Physisorption of SDS in a Hydrocarbon Nanoporous Polymer

Li¹,

Wang²,

Vigild³

et al. 2010

Langmuir

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“…In the previous section, we discussed the increased solubility, which can facilitate the liquid drops to spread over larger areas, as compared to non‐dissolutive spreading. When the droplet is spread over a large area, it is easy to be absorbed . After the droplet impact, the surface below the point of first contact of drop starts becoming saturated with liquid, thereby making further absorption processes slow.…”

Section: Resultsmentioning

confidence: 99%

An investigation on dissolutive wetting of porous urea surface

et al. 2018

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Dissolutive spreading over a porous surface is a phenomenon involving spreading, penetration, as well as dissolution. Droplet spreading forms the basis of numerous industrial operations including the spray coating of urea fertilizer to produce slow release urea. The slow release characteristics of urea highly depend on the coating uniformity that can be achieved by sound knowledge of droplet spreading behaviour over the urea surface. Since numerous waterborne coating materials are being studied presently, dissolutive wetting of the urea surface has been investigated in the current work. Response surface methodology has been utilized to study the interactive effects of process parameters on the dissolutive wetting of an aqueous glycerin solution on a porous urea surface. The effect of impact velocity, surface porosity, and urea solubility has been investigated on three response objectives namely contact angle, spreading factor, and normalized residual drop volume. The results have been compared with an earlier work performed under similar conditions for non-dissolutive wetting. The comparison reveals that dissolutive wetting shows lesser optimum contact angle (81 %) and greater optimum spreading factor (21 %) as compared to non-dissolutive wetting.

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“…The disintegration time value ranged in the interval (306-3780 s) communicated by Almukainzi et al (2010) about dietary supplementsbased tablets, knowing also that the USP disintegration standard for vitamin C tablets is of 1800 s max in water at 310 (Bhagavan & Wolkoff 1993). In this context, Brielles et al (2008) has already showed that the kinetic monitoring by EC allows evaluating not only the time of complete dissolution of a tablet but also the nature of the disintegration process: Rapid disintegration, erosion regime and an intermediary regime. Nevertheless, the compression pressure appears to influence considerably the effect of temperature on ion migration.…”

Section: Resultsmentioning

confidence: 99%

“…The electrical conductivity was measured by means of conductivity meter (Type EC 214 HANNA). Frenning et al (2002) have already used the electric conductivity measurement to explore drug dissolution of tablets containing micronized cellulose and NaCl as a model drug, whereas Brielles et al (2008) and Chantraine et al (2006) have employed the electric conductivity to study the phenomenon of dissolution of detergent tablets. On the other hand, Mikac et al (2007) monitored the dissolution of tablets containing NaCl and carboxylic acids by following the conductivity changes in surrounding medium by means of electric current density imaging technique, whereas Gauza and Kubisz (2010) performed tablets from collagen in view to study the water release process of this protein, adopting the electric conductivity as quantification criterion of water transfer.…”

Section: Dissolution Testmentioning

confidence: 99%