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Updated: May 23, 2026
05:26
Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
Published on: February 10, 2023
Synthesis of core-shell composites using an inverse surfmer
E Armando Zaragoza-Contreras1, Margarita Stockton-Leal, Claudia A Hernández-Escobar
1Centro de Investigación en Materiales Avanzados, S.C. Laboratorio Nacional de Nanotecnología. Miguel de Cervantes No. 120, Complejo Industrial Chihuahua, Chihuahua, Chih., Mexico. armando.zaragoza@cimav.edu.mx
Journal of Colloid and Interface Science
|April 24, 2012
Summary
Anilinium dodecylsulfate, a novel surfmer, lowers critical micellar concentration and enables inverse surfmer functionality in polystyrene/polyaniline composite synthesis, creating a core-shell structure.
Area of Science:
- Materials Science
- Polymer Chemistry
- Colloid and Surface Chemistry
Background:
- Anilinium dodecylsulfate (ADS) is synthesized from aniline and sodium dodecylsulfate (SDS).
- The study investigates the properties and applications of ADS as a surfmer in composite material synthesis.
Purpose of the Study:
- To determine the critical micellar concentration (CMC) of ADS and compare it to SDS.
- To utilize ADS as a surfmer in the synthesis of polystyrene/polyaniline core-shell composites.
- To introduce and define the concept of an 'inverse surfmer' based on ADS's functionality.
Main Methods:
- Electrical conductimetry was employed to measure the CMC of ADS.
- Emulsion polymerization of styrene was stabilized by ADS.
- Oxidative polymerization was used to synthesize polyaniline.
- Electron microscopy and thermogravimetric analysis were utilized for microstructure analysis.
Main Results:
- Replacing the sodium countercation with anilinium in dodecylsulfate significantly reduced the CMC.
- ADS acted as a surfmer, stabilizing styrene emulsion polymerization and subsequently forming polyaniline.
- The surfmer function was directed towards the external phase, unlike conventional surfmers.
- Characterization confirmed the formation of polystyrene/polyaniline core-shell composites.
Conclusions:
- Anilinium dodecylsulfate exhibits a lower CMC than sodium dodecylsulfate.
- ADS functions as an 'inverse surfmer' by directing its activity to the external phase during polymerization.
- The study successfully synthesized polystyrene/polyaniline core-shell composites using ADS.
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