Effects of sodium laurylsulfate on crystal structure of calcite formed from mixed solutions

Bang, Jae-Wook; Jang, Young-Nam; Song, Kyung Soon; Jeon, Chi Wan; Kim, Wonbaek; Lee, Myung Gyu; Park, So-Jin

doi:10.1016/j.jcis.2010.12.084

Cited by 9 publications

(4 citation statements)

References 26 publications

(38 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A sharp weight loss was observed after 600 °C. These observations are in good agreement with those reported in the literature. − For the oil-aged sample, a rapid weight loss was observed when the temperature increased from room temperature to around 100 °C. The weight loss in this region can be attributed to desorption of water molecules from the surface.…”

Section: Resultssupporting

confidence: 92%

Experimental Investigation of Wettability Alteration of Oil-Wet Carbonates by a Non-ionic Surfactant

et al. 2018

View full text Add to dashboard Cite

Wettability alteration toward a more water-wet state was found to be a promising approach for oil recovery improvement in oil-wet and naturally fractured carbonate reservoirs. This approach has been extensively studied in the literature using low-salinity/smart water and surfactant injection separately. However, application of surfactants in enhanced oil recovery is limited by their compatibility with the conditions of the reservoirs. In this study, polyethoxylated non-ionic surfactants with different ethylene oxide units were combined with low-salinity brine for a more efficient and cost-effective process. The compatibility of the surfactant solutions highly improved by reducing the salinity in the range of 200–2 g/L. Interfacial tension (IFT) measurements revealed that IFT decreased with increasing salinity. Contact angle measurements of calcite surfaces showed that wettability can be altered from a strong oil-wet state to a water-wet state after treatment with solutions of non-ionic surfactants over a wide range of salinities (∼2–110 g/L). ζ potential, Fourier transform infrared spectroscopy, and thermogravimetric analysis revealed that the non-ionic surfactant could partially displace carboxylate compounds from the surface and adsorb by forming a hydrogen bond with the hydroxyl group on the calcite surface. The formation of hydrogen bonds between ethoxy groups of the surfactant and hydroxyl or carboxylic groups on the solid surface can result in the replacement of organic compounds on the calcite surface. The organic compounds could form a new layer on the layer of adsorbed surfactant molecules via hydrophobic interactions. In addition, adsorption of the hydrophobic part of the non-ionic surfactant on the hydrophobic calcite surface and the formation of a surfactant double layer could partially contribute to the wettability alteration process.

show abstract

Section: Resultssupporting

confidence: 92%

Experimental Investigation of Wettability Alteration of Oil-Wet Carbonates by a Non-ionic Surfactant

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Recent research initiatives have shown that calcite crystals form cohesive "bridges" between existing sand grains, increasing the stiffness of sand with limited decrease in permeability (DeJong et al, 2010;Van Paassen et al, 2010). Ureolytic-driven calcite production has also been proposed to suppress dust, reduce permeability in granular media, improve soils, stabilize slopes, and strengthen liquefiable soils (Bang et al, 2011;Burbank et al, 2011).…”

Section: Impermeability Testmentioning

confidence: 99%

Bioremediation of lead by ureolytic bacteria isolated from soil at abandoned metal mines in South Korea

Kang

Shin

et al. 2015

Ecological Engineering

147

View full text Add to dashboard Cite

“…Regarding the MN (Figure 4a), it has a broad peak centered at 305 °C corresponding to its degradation [13]. In the microparticles loaded with MN, the characteristic peaks of the degradations step of the forming polymers were observed, but not the peaks of MN [31][32][33][34][35]. As observed in Figure 4b, LDCH presented a degradation peak centered at around 250 °C [36].…”

Section: Thermal Characterizationmentioning

confidence: 84%

Miconazole Nitrate Microparticles in Lidocaine Loaded Films as a Treatment for Oropharyngeal Candidiasis

Tejada,

Calvo,

Morri

et al. 2023

Materials

View full text Add to dashboard Cite

Oral candidiasis is an opportunistic infection that affects mainly individuals with weakened immune system. Devices used in the oral area to treat this condition include buccal films, which present advantages over both oral tablets and gels. Since candidiasis causes pain, burning, and itching, the purpose of this work was to develop buccal films loaded with both lidocaine (anesthetic) and miconazole nitrate (MN, antifungal) to treat this pathology topically. MN was loaded in microparticles based on different natural polymers, and then, these microparticles were loaded in hydroxypropyl methylcellulose-gelatin-based films containing lidocaine. All developed films showed adequate adhesiveness and thickness. DSC and XRD tests suggested that the drugs were in an amorphous state in the therapeutic systems. Microparticles based on chitosan-alginate showed the highest MN encapsulation. Among the films, those containing the mentioned microparticles presented the highest tensile strength and the lowest elongation at break, possibly due to the strong interactions between both polymers. These films allowed a fast release of lidocaine and a controlled release of MN. Due to the latter, these systems showed antifungal activity for 24 h. Therefore, the treatment of oropharyngeal candidiasis with these films could reduce the number of daily applications with respect to conventional treatments.

show abstract

Effects of sodium laurylsulfate on crystal structure of calcite formed from mixed solutions

Cited by 9 publications

References 26 publications

Experimental Investigation of Wettability Alteration of Oil-Wet Carbonates by a Non-ionic Surfactant

Experimental Investigation of Wettability Alteration of Oil-Wet Carbonates by a Non-ionic Surfactant

Bioremediation of lead by ureolytic bacteria isolated from soil at abandoned metal mines in South Korea

Miconazole Nitrate Microparticles in Lidocaine Loaded Films as a Treatment for Oropharyngeal Candidiasis

Contact Info

Product

Resources

About