Synthesis of cationic nanogels through microemulsion polymerization
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Synthesis of Cationic Nanogels Through Microemulsion Polymerization. Tamona Williams SPGRE 2001 Research University of North Carolina Department of Chemistry. Microemulsion.

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Synthesis of Cationic Nanogels Through Microemulsion Polymerization

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Synthesis of cationic nanogels through microemulsion polymerization

Synthesis of Cationic Nanogels Through Microemulsion Polymerization

Tamona Williams

SPGRE 2001 Research

University of North Carolina

Department of Chemistry


Microemulsion

Microemulsion

A water-in-oil microemulsion is an optically transparent mixture oil, water,and surfactant. Water droplets are in a continuous oil phase stabilized by surfactant.

Continuous Oil Phase

Surfactant Molecules

Water Droplets


Microscopic appearance microemulsion polymerization

Microscopic Appearance Microemulsion Polymerization

Surfactant

and oil phase

removed

Initiator added

in oil phase

Isolation of Particles in H2O

Microemulsion

Polymerization


Structure of monomers used in microemulsion polymerization

Structure of Monomers Used in Microemulsion Polymerization

PEGdiacrylate

2-Hydroxylethylacrylate

2-Acryloxyethyltrimethylammonium chloride


Characterization of nanogels

Characterization of Nanogels

Proton NMR

Transmission Electron Microscopy

Dynamic Light Scattering


Tem images of cationic nanogels

TEM Images of Cationic Nanogels:

0% Charged Monomer

12% Charged Monomer

6% Charged Monomer

66K Magnification on Copper-Formvar Grid and Stained with PTA


Dynamic light scattering data

Dynamic Light Scattering Data

Diameter of Nanogels by Dynamic Light Scattering


Formulation of microemulsions with charged monomer

Formulation of Microemulsions with Charged Monomer

Objective: To form microemulsion with increased

amount of 2-acryloxyethyltrimethylammonium chloride

Increasing

Monomer Concentration


Phase diagram for laureth 3

Phase Diagram for Laureth-3


Conclusions

Conclusions

  • Cationic nanogels were formed with a maximum of 12% charged monomer.

  • Decreasing the amount of surfactant allows the formulation of microemulsions at high percentages of charged monomer.

  • Further analysis of how surfactant controls the amount of charged monomer that will formulate a microemulsion, may aid in developing nanogels with more charge.


Acknowledgements

Acknowledgements

SPGRE – National Science Foundation

Dr. Joeseph DeSimone

Dr. Michael Rubenstein

Karen Erford


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