Granted Patent
B2
US 12,625,134 · App. 17/001,401 · Granted May 12, 2026
Complex liquid crystal droplets
Inventors:
Timothy Manning Swager (Newton, MA); Cassandra Zentner (Brighton, MA); Alberto Concellon Allueva (Boston, MA)
Assignee:
Massachusetts Institute of Technology
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Abstract
Articles (e.g., a colloid) and methods for providing complex colloids comprising a hydrocarbon phase (e.g., a hydrocarbon phase comprising a liquid crystal) and a fluorocarbon phase are generally described. In some embodiments, the hydrocarbon phase and the fluorocarbon phase are distinct.
Claims (35)
1 . An article, comprising:
an aqueous phase;
a mesogenic surfactant;
a droplet, wherein the droplet comprises a hydrocarbon phase, second phase immiscible with the hydrocarbon phase such that an interface is formed between the hydrocarbon phase and the second phase,
wherein the article comprises a second interface formed between the hydrocarbon phase and the aqueous phase, wherein the hydrocarbon phase comprises a liquid crystal, and
wherein the mesogenic surfactant anchors the liquid crystal to the second interface thereby directing orientation of the molecules of the liquid crystal within the droplet.
2 . The article of claim 1 , wherein the second phase comprises a fluorocarbon phase, and wherein the hydrocarbon phase and the second phase have a relative interfacial tension of at least 3 mN/m.
3 . The article of claim 1 , wherein the liquid crystal is smetically ordered.
4 . The article of claim 1 , wherein the liquid crystal is cholesterically ordered.
5 . The article of claim 1 , wherein the second phase is a fluorocarbon phase comprising a hydrofluoroether.
6 . The article of claim 1 , wherein the droplet comprises a Janus droplet.
7 . The article of claim 1 , wherein the droplet comprises a plurality of Janus droplets.
8 . The article of claim 1 , wherein the hydrocarbon phase and the second phase form a Janus droplet.
9 . The article of claim 1 , wherein the hydrocarbon phase and the second phase form an asymmetric Janus droplet.
10 . The article of claim 1 , wherein the mesogenic surfactant is a nonionic surfactant.
11 . The article of claim 1 , further comprising an emulsifying agent.
12 . The article of claim 1 , wherein the second phase comprises a fluorocarbon phase, and wherein the aqueous phase, the hydrocarbon phase, and/or the second phase have a relative interfacial tension of at least 4 mN/m and at most 8 mN/m.
13 . The article of claim 1 , wherein the liquid crystal comprises at least one point defect.
14 . The article of claim 1 , wherein the droplet further comprises a plurality of functional groups dispersed uniformly over a surface at a first temperature such that the plurality of functional groups localizes into one of more clusters by a phase transition of the liquid crystal within the droplet.
15 . The article of claim 1 , wherein molecules of the liquid crystal align perpendicularly to the aqueous phase.
16 . The article of claim 1 , wherein molecules of the liquid crystal align parallel to the aqueous phase.
17 . An article, comprising:
an aqueous phase;
a nonionic surfactant;
a droplet, wherein the droplet comprises a hydrocarbon phase, second phase immiscible with the hydrocarbon phase such that an interface is formed between the hydrocarbon phase and the second phase,
wherein the article comprises a second interface formed between the hydrocarbon phase and the aqueous phase, wherein the hydrocarbon phase comprises a liquid crystal, and
wherein the nonionic surfactant anchors the liquid crystal to the second interface thereby directing orientation of the molecules of the liquid crystal within the droplet, and wherein the nonionic surfactant comprises Formula (I):
wherein
designates connection from an intervening chemical species.
18 . A method for preparing the article of claim 17 , comprising:
providing an aqueous phase, a hydrocarbon phase, and a fluorocarbon phase, wherein the hydrocarbon phase comprises a liquid crystal; providing a non-ionic surfactant, wherein the nonionic surfactant comprises Formula (I):
wherein,
designates connection from an intervening chemical species; emulsifying the aqueous phase, the hydrocarbon phase, the fluorocarbon phase with an emulsifying agent; and evaporating the emulsifying agent to prepare a colloid.
19 . The method of claim 18 , comprising applying a stimulus to change the position of the hydrocarbon phase and the fluorocarbon phase.
20 . The article of claim 19 , wherein the stimulus is light.
Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Mar 25, 2021
From: SWAGER, TIMOTHY MANNING; ZENTNER, CASSANDRA; CONCELLON ALLUEVA, ALBERTO
To: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
Reel/Frame 055716/0073 →
Continuity (7)
Provisional Application
62925756
· Oct 24, 2019
Provisional Application
62073896
· Oct 31, 2014
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