COATED CHLORIDE SALT PARTICLES AND METHODS OF MAKING AND USING THE SAME

Abstract

Described herein are coated chloride salt particles, including NaCl/TiO2 and NaCl/SiO2 core/shell particles, along with methods of making and using the same.

Description

Claims

1. A particle comprising a core and a shell, wherein the core comprises a chloride salt (e.g., sodium chloride and/or potassium chloride) and the shell comprises titanium dioxide and/or silicon dioxide.

2. The particle of claim 1, wherein the core is hygroscopic and the shell is hydrophilic.

3. The particle of claim 1, wherein the shell is present in amount of about 0.5% to about 20% by weight of the particle, optionally about 0.5% to about 20% by weight of the particle.

4. The particle of claim 1, wherein the particle has a cubic size in a range of about 400 nm to about 10000 nm.

5. The particle of claim 1, wherein the particle has a water vapor adsorption capacity that is greater than (e.g., at least 2 times, 20 times, 100 times, or 150 times) the water vapor adsorption capacity of a chloride salt particle (e.g., an uncoated chloride salt (e.g., sodium and/or potassium chloride) particle, a pure chloride salt particle and/or a particle consisting of a chloride salt) of the same or substantially the same size.

6. The particle of claim 1, wherein the particle has a water adsorption capacity of at least about 1 cm3/g to about 100 cm3/g.

7. The particle of claim 1, wherein the particle adsorbs water when in an environment having a relative water vapor pressure in a range of about 0.1 P/Po or greater.

8. The particle of claim 1, wherein the shell comprises amorphous titanium dioxide and/or crystalline titanium dioxide (e.g., anatase or rutile).

9. The particle of claim 1, wherein the particle has a hygroscopic point that is decreased compared to a chloride salt particle (e.g., an uncoated chloride salt (e.g., sodium and/or potassium chloride) particle, a pure chloride salt particle and/or a particle consisting of a chloride salt).