Lock and key colloids and methods of manufacture

Patent metadata

Field	Value
Publication number	US-9302240-B2
Application number	US-201414451160-A
Country	US
Kind code	B2
Filing date	Aug 4, 2014
Priority date	Jan 29, 2010
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A method and system for assembling building blocks of colloidal particles and also for shaping of colloids for self-assembly for manufacturing, processing and formation of compositions of matter. A first type of particle is selected as a “key” particle constructed to mate with a “lock” particle, the binding arising from depletion forces. A variety of shapes can be used to carry out this method and system to create compositions of matter. Colloids can be shaped by controlled deformation of multiphase colloid particles.

First claim

What is claimed is:

1. A method of creating shaped colloids comprising,
providing droplets comprising an organosilica oil;
providing solid seeds selected from the group consisting of polystyrene seeds and hematite seeds; and
heterogenically nucleating the droplets in the presence of the solid seeds;
polymerizing the organosilica oil; and
deforming the polymerized organosilica oil.

2. The method of claim 1 , further comprising dissolving the polymerized organosilica oil and recovering the seeds.

3. The method of claim 1 , wherein the polymer seeds comprise solid polystyrene.

4. The method of claim 1 , wherein the polymer seeds comprise hematite.

5. The method of claim 4 , comprising removing the hematite seed by chemical etching.

6. The method of claim 1 , wherein the organosilica oil is 3-methacryloxypropyl trimethoxysilane (TPM).

7. The method of claim 1 , wherein deforming the organosilica oil comprises additional polymerization of the organosilica oil or removing the solid seed.

8. The method of claim 7 , wherein the additional polymerization of the organosilica oil comprises radically polymerizing the droplet forming a solid resulting in composite colloids of the droplet and seed.

9. The method of claim 8 , further dissolving a plurality of second polymer soluble molecules in the solid seeds prior to radical polymerization of the organosilica oil.

10. The method of claim 8 , further dissolving a plurality of second polymer soluble molecules in the second polymer prior to radical polymerization of the droplet.

11. A method of creating shaped particles comprising:
solubilizing 3-methacryloxypropyl trimethoxysilane (TPM) in water by hydrolysis;
polymerizing the solubilized TPM into low molecular weight oligomers via a polycondensation reaction to form a droplet;
phase separating the oligomers to form charge-stabilized oil-in-water emulsion droplets; and
creating a cavity in the droplets by radical polymerization of acrylate moieties of the oligomers forming cross-linked silsesquioxanes.

12. The method of claim 11 , further comprising the addition of polystryrene seed prior to phase separation and forming the charge-stabilized oil-in-water emulsion droplets comprises engulfing a seed in an oil phase of the droplet or trapping a seed at an interface of the oil phase and a water phase of a droplet.

13. The method of claim 12 , further comprising, after forming charge-stabilized oil-in-water emulsion droplets, removing the polystyrene seed by organic solvent.

14. The method of claim 13 , further comprising monitoring deformation of the seeds and removing out-of-equilibrium shapes by stripping the toluene off of the seeds.

15. A method of creating shaped particles comprising:
solubilizing an organosilica oil in water by hydrolysis;
polymerizing the solubilized organosilica into low molecular weight oligomers via a polycondensation reaction to form a droplet;
adding polystryrene seeds;
phase separating the oligomers to form charge-stabilized oil-in-water emulsion droplets encapsulating the polystyrene seeds; and
dissolving the polystyrene seed and deforming the droplet.

16. The method of claim 15 , wherein the organosilica oil is 3-methacryloxypropyl trimethoxysilane (TPM).

Assignees

• Univ New York

Inventors

• Pine David J
• Chaikin Paul Michael
• Sacanna Stefano
• Irvine William

Classifications

• C08L33/14

  of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen · CPC title

• B01J13/0021 Primary

  containing a solid organic phase · CPC title

• C08L25/06

  Polystyrene · CPC title