Adsorption characteristics of sugar-based monomeric and gemini surfactants at the silica/aqueous solution interface

Sakai, Kenichi; Tamura, Mamoru; Umezawa, Shin; Takamatsu, Yuichiro; Torigoe, Kanjiro; Yoshimura, Tomokazu; Esumi, Kunio; Sakai, Hideki; Abe, Masahiko

doi:10.1016/j.colsurfa.2008.06.033

Cited by 18 publications

(5 citation statements)

References 23 publications

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“…As mentioned earlier, as a result of their increased packing parameter, gemini surfactants tend to assemble into aggregates with a reduced positive surface curvature as compared to those formed by monomeric surfactants 22 . Because we have previously demonstrated bilayer formation for a few gemini surfactant systems, it seems reasonable to assume that NOH-9,9-Am10 forms a bilayer at the silica/aqueous solution interface, in line with the general trend observed for gemini surfactants 16,20 .…”

Section: Figsupporting

confidence: 79%

Quaternary Ammonium-Type Gemini Surfactants Synthesized from Oleic Acid: Aqueous Solution Properties and Adsorption Characteristics

Sakai¹,

Saito²,

Uka³

et al. 2013

J. Oleo Sci.

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Section: Figsupporting

confidence: 79%

Quaternary Ammonium-Type Gemini Surfactants Synthesized from Oleic Acid: Aqueous Solution Properties and Adsorption Characteristics

Sakai¹,

Saito²,

Uka³

et al. 2013

J. Oleo Sci.

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“…The effect described therein and works cited is due to increased hydrophobicity of the tail length, which significantly affects their CMC. The same impact of the alkyl chain length on the CMC value was observed also for other sugar-based surfactants such as urinate and uronoamide derivatives of dodecyl glucuronolactones [26], gluconamide-type surfactants [12,13] and sucrose monoesters [6].…”

Section: Methodssupporting

confidence: 62%

“…The surfactants based on D-glucose, D-mannose, and D-galactose and triethylene glycolate spacer to provide additional water solubility were synthesized by Adam et al and their photocontrollable ice recrystallization inhibition activity were presented [8]. Sakai et al [11,12] studied the adsorption and micellization behavior of novel sugar gemini surfactants with glucono- and lactono- headgroups and compared to the corresponding monomeric surfactants. The investigation showed that greater efficiencies of the gemini surfactants in the adsorption and micellization result from the greater degree of molecular packing.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Surface and Antimicrobial Activity of New Lactose-Based Surfactants

et al. 2019

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This work presents a synthesis method for new surfactants based on lactose. The compounds obtained belong to the homologous series of O-β-D-Galactopyranosyl-(1→4)-N-alkyl-(3-sulfopropyl)-D-glucosamine hydrochloride, containing 12 and 14 carbon atoms in the alkyl chain, and they may serve as an example of cationic surfactants. The newly synthesized compounds exhibit good surface properties, low value of CMC (Critical Micelle Concentration) and good wetting properties. These surfactants’ ability to produce foam is considerably higher than in the commercial surfactants. Moreover, antibacterial and fungistatic activity was carried out by well diffusion assay against the selected bacteria (Staphylococcus aureus, Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa), yeasts (Candida albicans) and filamentous fungi (Fusarium graminearum, F. avenaceum, F. oxysporum, F. culmorum, F. equiseti, Alternaria alternata and Botrytis cinerea). It was shown that the resulting quaternary salts significantly inhibit the growth of tested microorganisms. Antibacterial and fungistatic activity of the surfactant compounds varied depending on the species of bacteria or fungi. The results of antimicrobial activity of new lactose derivatives indicate that the compounds exhibit larger or similar antagonistic activity against tested bacteria and fungi than typical cationic surfactant cetylpyridinium chloride.

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“…Actually, WSNs contain a great number of surface silanol Si-OH, as testified by the presence of a band 970 cm −1 in the FT-IR spectra of Figure 1 (stretching vibration of Si-OH) [56]. Surface silanols can interact with cellobiose via hydrogen bonding, causing an increased local concentration [57]. The apparent K M for the BGI9 biocatalyst was about twice that of free BG, whereas V max was about half.…”

Section: Resultsmentioning

confidence: 99%

Covalent Immobilization of β-Glucosidase into Mesoporous Silica Nanoparticles from Anhydrous Acetone Enhances Its Catalytic Performance

et al. 2020

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An immobilization protocol of a model enzyme into silica nanoparticles was applied. This protocol exploited the use of the bifunctional molecule triethoxysilylpropylisocyanate (TEPI) for covalent binding through a linker of suitable length. The enzyme β-glucosidase (BG) was anchored onto wrinkled silica nanoparticles (WSNs). BG represents a bottleneck in the conversion of lignocellulosic biomass into biofuels through cellulose hydrolysis and fermentation. The key aspect of the procedure was the use of an organic solvent (anhydrous acetone) in which the enzyme was not soluble. This aimed to restrict its conformational changes and thus preserve its native structure. This approach led to a biocatalyst with improved thermal stability, characterized by high immobilization efficiency and yield. It was found that the apparent KM value was about half of that of the free enzyme. The Vmax was about the same than that of the free enzyme. The biocatalyst showed a high operational stability, losing only 30% of its activity after seven reuses.

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Adsorption characteristics of sugar-based monomeric and gemini surfactants at the silica/aqueous solution interface

Cited by 18 publications

References 23 publications

Quaternary Ammonium-Type Gemini Surfactants Synthesized from Oleic Acid: Aqueous Solution Properties and Adsorption Characteristics

Quaternary Ammonium-Type Gemini Surfactants Synthesized from Oleic Acid: Aqueous Solution Properties and Adsorption Characteristics

Synthesis, Surface and Antimicrobial Activity of New Lactose-Based Surfactants

Covalent Immobilization of β-Glucosidase into Mesoporous Silica Nanoparticles from Anhydrous Acetone Enhances Its Catalytic Performance

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