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Flash NanoPrecipitation for the Encapsulation of Hydrophobic and Hydrophilic Compounds in Polymeric Nanoparticles
Published on: January 7, 2019
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Inorganic Nanoparticles Embedded in Polydimethylsiloxane Nanodroplets.
Sandrine Lteif1, Neda A Nosratabad1, Sisi Wang1
1Department of Chemistry and Biochemistry, The Florida State University, Tallahassee, Florida 32306, United States.
Langmuir : the ACS Journal of Surfaces and Colloids
|October 26, 2023
Summary
Researchers developed a novel method to encapsulate hydrophobic nanoparticles within polydimethylsiloxane (PDMS) nanodroplets. This technique creates stable, surfactant-free nanocomposite dispersions for transporting nanoparticles in aqueous systems.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Chemistry
Background:
- Polymeric nanocarriers stabilize and transport nanoparticles in various environments.
- Hydrophobic materials like polydimethylsiloxane (PDMS) pose challenges for aqueous dispersion due to surface energy mismatches.
- Encapsulating hydrophobic nanoparticles in aqueous media requires advanced nanocarrier design.
Purpose of the Study:
- To develop a method for encapsulating hydrophobic metal and metal oxide nanoparticles within PDMS nanodroplets.
- To create stable aqueous dispersions of these nanocomposite nanodroplets without surfactants.
- To investigate the hierarchical structure and stability of the resulting nanocarriers.
Main Methods:
- Utilized flash nanoprecipitation for encapsulating nanoparticles within PDMS nanodroplets.
- Functionalized PDMS with amino groups and capped with poly(styrenesulfonate) to form a glassy outer shell.
- Employed small-angle X-ray scattering (SAXS) to elucidate hierarchical structuring.
Main Results:
- Successfully encapsulated hydrophobic nanoparticles within PDMS nanodroplets, with nanoparticles nucleating droplet formation and reducing size.
- Achieved stable aqueous dispersions of nanocomposite nanodroplets in salt solutions without surfactants.
- Demonstrated hierarchical structuring within the nanodroplets.
Conclusions:
- Developed a novel platform for creating stable, surfactant-free nanocomposite nanodroplets.
- The hierarchical structure enables the isolation and transport of hydrophobic nanoparticles in aqueous systems.
- This method offers a new approach for handling hydrophobic materials in aqueous environments.
