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Related Concept Videos

Surface Active Agents01:27

Surface Active Agents

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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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Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
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The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called...
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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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Design and Characterization of Functionalized Polyelectrolyte-Dicephalic Surfactant Complexes as Multipurpose

Weronika Szczęsna-Górniak1, Łukasz Lamch1, Lucyna Hołysz2

  • 1Department of Engineering and Technology of Chemical Processes, Faculty of Chemistry, Wrocław University of Science and Technology, Wrocław 50-370, Poland.

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Summary
This summary is machine-generated.

Novel polyelectrolyte-surfactant complexes (PESCs) combine antimicrobial polymers with a new surfactant for drug delivery. These multifunctional carriers effectively encapsulate curcumin, offering sustained release and antimicrobial properties for biomedical applications.

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Area of Science:

  • Soft-matter science
  • Materials science
  • Biomedical engineering

Background:

  • Polyelectrolyte-surfactant complexes (PESCs) are versatile soft-matter systems for developing multifunctional delivery platforms.
  • Antimicrobial-functionalized poly-(acrylic acid) (PAA) derivatives (PAA-THY-15, PAA-MEN-15, PAA-CAR-15) were previously developed.
  • A novel cationic dicephalic surfactant, C12-DC NMe3Br, was synthesized.

Purpose of the Study:

  • To design, form, and characterize novel PESCs using antimicrobial PAA derivatives and a new dicephalic surfactant.
  • To evaluate the potential of these PESCs as drug delivery systems (DDSs) by loading them with curcumin (CUR).
  • To assess the self-assembly, functional properties, and drug delivery capabilities of the designed PESCs.

Main Methods:

  • Complexation of antimicrobial PAA derivatives with C12-DC NMe3Br to form PESCs.
  • Loading of curcumin (CUR) into the PESCs.
  • Physicochemical characterization including surface activity (goniometry), colloidal stability (turbidimetry), particle size, and surface charge (DLS).
  • Evaluation of encapsulation efficiency (EE) and release kinetics (UV-vis spectrophotometry).

Main Results:

  • Novel PESCs were successfully formed by combining antimicrobial PAA derivatives with the synthesized dicephalic surfactant.
  • The PESCs demonstrated effective encapsulation of curcumin (CUR).
  • Dynamic light scattering (DLS) and turbidimetric studies confirmed particle formation and colloidal stability.
  • UV-vis spectrophotometry indicated sustained release of CUR from the PESCs.

Conclusions:

  • The integration of antibacterial PAA derivatives with dicephalic surfactants creates tunable, multifunctional PESCs.
  • These novel PESCs exhibit combined antimicrobial protection and controlled drug delivery capabilities.
  • The designed complexes show promise as advanced DDSs for biomedical applications.