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Surfactants, named for their behavior at interfaces, positively adsorb at the interfaces of two phases, reducing interfacial tension. Their versatility as emulsifiers, detergents, and foaming agents stems from this ability. Surfactants, often termed amphiphiles, share the property of amphipathy, with molecules having both hydrophilic and hydrophobic portions. The hydrophilic part is called the head, and the hydrophobic part, including an elongated alkyl substituent, forms the tail.Surfactants...
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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Related Experiment Video

Updated: Mar 28, 2026

Studying Surfactant Effects on Hydrate Crystallization at Oil-Water Interfaces Using a Low-Cost Integrated Modular Peltier Device
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Manipulating perfume delivery to the interface using polymer-surfactant interactions.

Robert Bradbury1, Jeffrey Penfold2, Robert K Thomas1

  • 1Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, United Kingdom.

Journal of Colloid and Interface Science
|January 3, 2016
PubMed
Summary

Polyelectrolyte-surfactant mixtures can control perfume adsorption at interfaces. Interactions between these components significantly influence the delivery and effectiveness of perfumes in consumer products.

Keywords:
AdsorptionAnionic surfactantModel perfumesPolyelectrolytes

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Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Formulation Science

Background:

  • Enhanced delivery of perfumes to interfaces is crucial for product effectiveness in home and personal care.
  • Understanding the adsorption behavior of fragrance ingredients at interfaces is key to optimizing formulations.

Purpose of the Study:

  • To explore the role of polyelectrolyte-surfactant mixtures in promoting perfume adsorption at interfaces.
  • To investigate how interactions between different components influence perfume partitioning.

Main Methods:

  • Neutron reflectivity (NR) was employed to quantify the adsorption of model perfumes (phenylethanol and linalool) at the air-water interface.
  • Experiments were conducted using anionic surfactant sodium dodecylsulfate (SDS) and cationic polyelectrolytes (poly(dimethyldiallyl ammonium chloride) and poly(ethyleneimine)).

Main Results:

  • In SDS-polydmdaac-perfume mixtures, the strong SDS-polydmdaac interaction suppressed perfume adsorption.
  • In PEI-SDS-perfume mixtures, competition between PEI-perfume and SDS-PEI interactions led to significant linalool adsorption, while phenylethanol adsorption was reduced.
  • Demonstrated the manipulation of perfume adsorption via polyelectrolyte-surfactant interactions.

Conclusions:

  • The competition between polyelectrolyte, surfactant, and perfume interactions dictates perfume partitioning to interfaces.
  • Tailoring these interactions offers a method to control perfume delivery and enhance product performance.