Silicon-modified carbohydrate surfactants IX: dynamic wetting of a perfluorinated solid surface by solutions of a siloxane surfactant above and below the critical micelle concentration

Wagner, Roland; Wu, Yuling; Richter, L.; Siegel, Stefan; Weißmüller, J.; Reiners, J.

doi:10.1002/(sici)1099-0739(199812)12:12<843::aid-aoc800>3.0.co;2-o

Cited by 10 publications

(2 citation statements)

References 26 publications

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“…Hybrid materials, from small molecules to polymers, oligomers, and nanostructured composites have been prepared and their applicability especially in biomedical fields has been proved. A broad variety of carbohydrate-modified siloxanes have been synthesized and tested as surfactants (3)(4)(5)(6) or in cosmetic formulations (3,(7)(8)(9). Such compounds are currently produced on an industrial scale and their use has gradually increased due to their excellent biodegradability, good dermatological compatibility, and absence of toxic effects.…”

Section: Introductionmentioning

confidence: 99%

“…The most commonly used reactions for linking carbohydrate derivatives with siloxanes is the hydrosilylation of allylglycosides (2,3,(10)(11)(12). A great variety of carbohydrate-modified siloxane surfactants have been prepared by Wagner and colleagues (3)(4)(5)(6)9). An alternative is the ring-opening reaction between an amino-functional siloxane and a carbohydrate lactone (9,(13)(14)(15), but other methods have also been used and are still developed (1,12,(16)(17)(18).…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Glucose-Modified Siloxanes by a Simplified Procedure

Racleş¹,

Cozan²

2012

Soft Materials

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A simplified alternative for the synthesis of carbohydrate-modified siloxanes is described. The starting siloxane precursors contain glycidyl functional groups, which react with glucose in dimethylformamide (DMF), in the presence of a gel type cation exchanger. The method eliminates protection-deprotection reactions, as well as moisture-sensitive or multiple reaction steps. Glycidylfunctionalized siloxane compounds are commercially available, but can be easily obtained in the desired architecture or chain length by hydrosilylation. Two examples are presented, describing the synthesis of a glucose-modified disiloxane and a siloxane copolymer bearing pendant glucose units. 1 H and 13 C nuclear magnetic resonance (NMR), and infrared spectroscopy (FT-IR) were used to confirm their structure. Evidence for the preservation of the polysiloxane chain after the reaction was obtained by 1 H-NMR, thus confirming the non-invasive role of wet gel-type cation exchanger in chemical modifications of siloxane copolymers. The water-soluble disiloxane compound exhibited typical surfactant behavior, with a critical micelle concentration (CMC) value of 6.3 × 10 −4 mol/L (determined by tensiometry) and an equilibrium surface tension of 32.8 mN/m. The obtained copolymer, incompletely modified with glucose, exhibited two glass transition temperatures by Differential Scanning Calorimetry (DSC).

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Glucose-Modified Siloxanes by a Simplified Procedure

Racleş¹,

Cozan²

2012

Soft Materials

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Silicon-modified carbohydrate surfactants VIII. Equilibrium wetting of perfluorinated solid surfaces by solutions of surfactants above and below the critical micelle concentration—surfactant distribution between liquid-vapour and solid-liquid interfaces

Wagner

Richter

et al. 1999

Appl. Organometal. Chem.

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For selected carbohydrate‐modified Silicon surfactants of the siloxane, carbosilane, polysilane and silane type, the concentration dependences of the liquid/vapour and solid/liquid interfacial tensions under equilibrium conditions have been determined. Further, the Lifshitz–van der Waals and donor–acceptor contributions have been calculated. Below the critical micelle concentration (cmc) a steep increase in donor–acceptor contributions to both interfacial tensions was found. The Lifshitz–van der Waals contribution of the liquid/vapour interfacial tension shows a pronounced minimum. Calculations of the concentration‐dependent surface coverage suggest that preferential adsorption to one of the interfaces does not take place. Copyright © 1999 John Wiley & Sons, Ltd.

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Silicon-modified surfactants and wetting: I. Synthesis of the single components of Silwet L77 and their spreading performance on a low-energy solid surface

Wagner

Czichocki

et al. 1999

Appl. Organometal. Chem.

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Defined surfactants of general formula [(CH3)3SiO]2CH3Si(CH2)3(OCH2CH2)3–9OCH3, have been synthesized from the corresponding oligoethylene glycol monoallyl monomethyl ethers via hydrosilylation. The concentration‐dependent spreading performance on hydrophobized silicon wafers has been investigated and compared with that of Silwet L77. For the hexaethylene glycol derivative the highest initial spreading velocities and largest spreading areas were found. Since Silwet L77 spreads faster than all the other derivatives under investigation, a synergistic effect of different compounds is unlikely. Minor differences were found for handshaken and sonicated solutions. Copyright © 1999 John Wiley & Sons, Ltd.

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Silicon-modified carbohydrate surfactants IX: dynamic wetting of a perfluorinated solid surface by solutions of a siloxane surfactant above and below the critical micelle concentration

Cited by 10 publications

References 26 publications

Synthesis of Glucose-Modified Siloxanes by a Simplified Procedure

Synthesis of Glucose-Modified Siloxanes by a Simplified Procedure

Silicon-modified carbohydrate surfactants VIII. Equilibrium wetting of perfluorinated solid surfaces by solutions of surfactants above and below the critical micelle concentration—surfactant distribution between liquid-vapour and solid-liquid interfaces

Silicon-modified surfactants and wetting: I. Synthesis of the single components of Silwet L77 and their spreading performance on a low-energy solid surface

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