Compositions including dichotomous composite particles, article including the composition, and structures having superhydrophobic, superoleophobic, or omniphobic surfaces
View Patent ↗The present disclosure provides for compositions, articles including the composition, and articles and structures having a superhydrophobic, a superoleophobic, or an omniphobic surface after disposing the composition onto a surface of the article or structure. In general, the composition includes a fluid and a plurality of composite particles having a hydrophilic core and hydrophobic agents on the surface of the hydrophilic core. The composition can be processed so that the composite particles are dispersible in water, while generating a superhydrophobic, superoleophobic, or omniphobic surface upon application.
1 . A composition, comprising a fluid and a plurality of composite particles, wherein the composite particle has a hydrophilic core, where the core has a plurality of hydrophobic agents attached thereto, wherein under condition A, the plurality of composite particles are hydrophobic and are suspended in the fluid, wherein under condition B, the plurality of composite particles are hydrophilic and are dispersed in the fluid, wherein the hydrophilic core is a hydrophilic polymer, wherein the hydrophilic polymer is a crosslinked polyvinyl alcohol (PVA) or latex, and wherein the hydrophobic agent is a hydrophobic polymer, wherein the hydrophobic polymer is polydimethylsiloxane or polyvinyl fluoride.
2 . The composition of claim 1 , wherein condition B has the composition at a first pressure so that the composition is at a pressure less than 1 ATM and the plurality of composite particles are hydrophilic and are dispersed in the fluid.
3 . The composition of claim 2 , wherein the first pressure is about 0.1 to 0.5 ATM.
4 . The composition of claim 1 , wherein condition B has the composition at a second pressure so that the composition is at a pressure greater than 1 ATM and the plurality of composite particles are hydrophilic and are dispersed in the fluid.
5 . The composition of claim 4 , wherein the second pressure is about 2 to 40 ATM.
6 . The composition of claim 1 , wherein condition B is where the composition has been subject to ultrasound and the plurality of composite particles are hydrophilic and are dispersed in the fluid.
7 . The composition of claim 1 , wherein condition A is where the composition has not been subject to ultrasound and the plurality of composite particles are hydrophobic and are suspended in the fluid.
8 . The composition of claim 1 , wherein the fluid is paint.