Bijels and methods of making the same
AssigneeThe Trustees of the University of Pennsylvania
InventorsMartin F Haase, Daeyeon Lee, Kathleen J Stebe
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Abstract
A method of making a bijel includes dispersing surface-active nanoparticles in a ternary liquid mixture. The ternary liquid mixture includes a hydrophilic liquid, a hydrophobic liquid, and a solvent. The ternary liquid mixture is contacted with water. A bijel includes a stable mixture of two immiscible liquids separated by an interfacial layer of colloidal particles. The bijel has temperature-independent stability, and the domain sizes are below one micrometer.
Claims19
A bicontinuous interfacially jammed emulsion that is a bijel having temperature-independent stability, the bijel made according to:
- dispersing surface-active nanoparticles into a monophasic ternary liquid mixture to give rise to a loaded mixture, a surface-active nanoparticle having a water-soluble ionic surfactant associated thereon,
- wherein the monophasic ternary liquid mixture comprises a hydrophilic liquid, a hydrophobic liquid, and a solvent,
- wherein the hydrophilic liquid comprises (i) a liquid that comprises at least one of water, ethylene glycol, and ethane diol, (ii) a polymerizable monomer, or (iii) a combination of the liquid and the polymerizable monomer,
- wherein the hydrophobic liquid comprises (i) a liquid that comprises at least one of diethyl phthalate, dimethylphthalate, 1,6-hexanediol diacrylate, 1,6-diacetoxyhexane, trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, triacetin, toluene, chloroform, laurylacrylate, butylacrylate, decanol, styrene, and oleic acid, (ii) a polymerizable monomer, or (iii) a combination of the liquid and the polymerizable monomer,
- wherein the solvent comprises at least one of ethanol, acetic acid, methanol, propanol, tetrahydrofuran, dimethyl sulfoxide (DMSO), or acetone, and
- wherein the surface-active nanoparticles are equally wettable by both the hydrophilic liquid and the hydrophobic liquid;
- and
- contacting the loaded mixture with water so as to initiate phase separation through spinodal decomposition and induce mass transfer of the solvent and give rise to the bijel.
A bicontinuous interfacially jammed emulsion that is a bijel, comprising:
- a stable mixture of two immiscible liquids separated by an interfacial layer of colloidal surface-active nanoparticles equally wettable by the two immiscible liquids, a surface-active nanoparticle of the interfacial layer of colloidal surface-active nanoparticles having a water-soluble ionic surfactant associated thereon,
- wherein one of the two immiscible liquids is a hydrophilic liquid and the other of the two immiscible liquids is a hydrophobic liquid,
- wherein the hydrophilic liquid comprises (i) a liquid that comprises at least one of water, ethylene glycol, and ethane diol, (ii) a polymerizable monomer, or (iii) a combination of the liquid and the polymerizable monomer,
- wherein the hydrophobic liquid comprises (i) a liquid that comprises at least one of diethyl phthalate (DEP), dimethylphthalate, 1,6-hexanediol diacrylate, 1,6-diacetoxyhexane, trimethylolpropane triacrylate, dipentaerythritol pentaacrylate, triacetin, toluene, chloroform, laurylacrylate, butylacrylate, decanol, styrene, and oleic acid, (ii) a polymerizable monomer, or (iii) a combination of the liquid and the polymerizable monomer,
- wherein the bijel has temperature-independent stability, and
- wherein the bijel has domain sizes of below one micrometer.
Dependencies are inferred from the claim text.