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US 2021/0275433 A1Published application
Janus particles and their use for surfactant-free cleansing and emulsion stabilization
AssigneeThe Trustees of Princeton University
InventorsRodney D. PRIESTLEY, Robert K. PRUD'HOMME, Sunny NIU
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Abstract
Janus particles, including biodegradable, biocompatible, anisotropic, amphiphilic Janus nanocolloids, and their use in stabilizing emulsions and cleansing are described.
Claims28
An emulsion comprising
- an asymmetric Janus (two-faced) nanoparticle comprising a hydrophilic surface as a hydrophilic face and a hydrophobic surface as a hydrophobic face;
- a hydrophilic liquid;
- a hydrophobic liquid;
- and
- an interface between the hydrophilic liquid and the hydrophobic liquid,
- wherein the asymmetric Janus nanoparticle is located at the interface.
3 more elements
A method of cleansing skin or another surface, comprising:
- applying a colloid suspension comprising an asymmetric Janus nanoparticle and water (or another liquid) to the skin or other surface;
- and
- rinsing the colloid suspension from the skin or other surface with water (or another liquid),
- wherein the asymmetric Janus nanoparticle comprises a high glass transition temperature (Tg) polymer and a low glass transition temperature (Tg) polymer,
- wherein the high glass transition temperature polymer has hydrophilic groups at a hydrophilic face of the Janus nanoparticle,
- wherein the low glass transition polymer has oleophilic groups at an oleophilic face of the Janus nanoparticle.
3 more elements
A geometrical Janus micelle, comprising:
- an aggregate of a plurality of Janus particles,
- wherein each Janus particle has a surface having a hydrophilic face and an oleophilic face and
- wherein the oleophilic face of each Janus particle is oriented toward a center of mass of the aggregate.
(canceled)
Dependencies are inferred from the claim text.