Enzyme‐Compatible Dynamic Nanoreactors from Electrostatically Bridged Like‐Charged Surfactants and Polyelectrolytes

Thiele, Martin J.; Davari, Mehdi D.; Hofmann, Isabell; König, Melanie; Lopez, Carlos G.; Vojcic, Ljubica; Richtering, Walter; Schwaneberg, Ulrich

doi:10.1002/anie.201805021

Cited by 21 publications

(12 citation statements)

References 31 publications

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“…Polyelectrolytes are polymers with ionic groups along their backbone, which can dissociate in solution. − Counterion dissociation leads to a large entropic gain which confers polyelectrolytes good solubility in media with high dielectric constants, most importantly water. As a result of their high phase stability, good biocompatibility, and ability to form complexes with charged species, polyelectrolytes have found broad applications as thickening and structuring agents in paints, oil-drilling fluids, and food and cosmetic products. − Beyond their importance as rheology modifiers and complexing agents, polyelectrolytes play an important role in biology. For example, they are relevant to the origin of life or joint lubrication, , as well as important components of cartilage tissue. − …”

Section: Introductionmentioning

confidence: 99%

Viscosity of Semidilute and Concentrated Nonentangled Flexible Polyelectrolytes in Salt-Free Solution

Lopez

Richtering

2019

J. Phys. Chem. B

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We report viscosity data of nonentangled sodium polystyrene sulfonate (NaPSS) in salt-free aqueous solution as a function of polymer concentration (c) and degree of polymerization (N). Different empirical equations are examined and found not to describe the semidilute solution viscosity over a wide concentration range and/or to yield values of [η] that do not match dilute solution measurements. Deviations from the scaling prediction of ηsp ∝ c 1/2 (Fuoss’ law) are observed at high concentrations. Specifically, we find ηsp ≈ N 1.26 c 1/2 e1.4c in the semidilute regime, which agrees with the scaling prediction only for c ≲ 0.02 M. The viscosity data presented in this study and in earlier reports show a high degree of consistency. A comparison with diffusion measurements for NaPSS in salt-free solution by Oostwal and co-workers suggests that the disagreement between the scaling theory and experiments does not arise solely from the concentration dependence of the monomeric friction coefficient.

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Section: Introductionmentioning

confidence: 99%

Viscosity of Semidilute and Concentrated Nonentangled Flexible Polyelectrolytes in Salt-Free Solution

Lopez

Richtering

2019

J. Phys. Chem. B

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“…The hydrophilic-hydrophobic balance (HLB, a parameter that indicates the surfactant's affinity for water and oil) and the critical packing parameter (CPP, a parameter that predicts the surfactant's self-assembly) are used to predict the properties of the surfactant. [24][25][26][27] The "nanoscale supramolecular structures composed of surfactants" as discussed above, have been used as templates for the synthesis of inorganic materials 28,29 enhancement of the activity of catalysts, 30 reaction field of nanoreactors, 31 modulation of wettability of biological interfaces, 32 and enhanced oil recovery from heterogeneous rocks. 33…”

Section: Overview Of Surfactantmentioning

confidence: 99%

A Critical Review of the Use of Surfactant-Coated Nanoparticles in Nanomedicine and Food Nanotechnology

Miyazawa¹,

Itaya²,

Burdeos³

et al. 2021

IJN

117

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Surfactants, whose existence has been recognized as early as 2800 BC, have had a long history with the development of human civilization. With the rapid development of nanotechnology in the latter half of the 20th century, breakthroughs in nanomedicine and food nanotechnology using nanoparticles have been remarkable, and new applications have been developed. The technology of surfactant-coated nanoparticles, which provides new functions to nanoparticles for use in the fields of nanomedicine and food nanotechnology, is attracting a lot of attention in the fields of basic research and industry. This review systematically describes these "surfactant-coated nanoparticles" through various sections in order: 1) surfactants, 2) surfactant-coated nanoparticles, application of surfactant-coated nanoparticles to 3) nanomedicine, and 4) food nanotechnology. Furthermore, current progress and problems of the technology using surfactant-coated nanoparticles through recent research reports have been discussed.

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“…Examples include cleaning, 8 spraying and coating operations, i.e. liquids emerging from orifices or spray nozzles, 9, 10 or bubbles and droplets formed within liquids, as in microfluidic devices.…”

Section: Introductionmentioning

confidence: 99%

“…“Dynamic” interfaces with nonequilibrium adsorption state are relevant to a wide range of processes and technologies in which “fresh” surfaces are created (Figure c). Examples include cleaning, spraying, and coating operations, that is, liquids emerging from orifices or spray nozzles, , or bubbles and droplets formed within liquids, as in microfluidic devices . In ink jet printing surface life-times of as low as fractions of a millisecond are of practical importance…”

Section: Introductionmentioning

confidence: 99%

Aroma Molecules as Dynamic Volatile Surfactants: Functionality beyond the Scent

Соболева

Проценко

Korolev

et al. 2019

ACS Appl. Mater. Interfaces

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Understanding of non-equilibrium processes at dynamic interfaces is indispensable for advancing design and fabrication of solid state and soft materials. The research presented here unveils specific interfacial behavior of aroma molecules and justifies their usage as multifunctional volatile surfactants. As non-conventional volatile amphiphiles we study commercially available poorly water-soluble compounds from the classes of synthetic and essential flavor oils. Their distinctive feature is high dynamic interfacial activity, so that they decrease the surface tension of aqueous solutions on a time scale of milliseconds. Another potentially useful property of such amphiphiles is their volatility, so that they notably evaporate from interfaces on a time scale of seconds. This behavior allows for control of wetting and spreading processes. A revealed synergetic interfacial behavior of mixtures of conventional and volatile surfactants is attributed to a decrease of the adsorption barrier as a result of high statistical availability of new sites at the surface upon evaporation of the volatile component. Our results offer promising advantages in manufacturing technologies which involve newly creating interfaces, such as spraying, coating technologies, ink-jet printing, microfluidics, laundry, stabilization of emulsions in cosmetic and food industry, as well as in geosciences for controlling aerosols formation.

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Enzyme‐Compatible Dynamic Nanoreactors from Electrostatically Bridged Like‐Charged Surfactants and Polyelectrolytes

Cited by 21 publications

References 31 publications

Viscosity of Semidilute and Concentrated Nonentangled Flexible Polyelectrolytes in Salt-Free Solution

Viscosity of Semidilute and Concentrated Nonentangled Flexible Polyelectrolytes in Salt-Free Solution

A Critical Review of the Use of Surfactant-Coated Nanoparticles in Nanomedicine and Food Nanotechnology

Aroma Molecules as Dynamic Volatile Surfactants: Functionality beyond the Scent

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