公开(公告)号：US20190226506A1

公开(公告)日：2019-07-25

申请号：US16137087

申请日：2018-09-20

Applicant: Massachusetts Institute of Technology

Inventor： Sushant Anand ,  Kripa K. Varanasi

IPC: F15D1/00 ,  B01L3/00

Abstract: Methods described herein provide a way to reduce or eliminate drag and adhesion of a substance flowing over a surface by creating a vapor cushion via evaporation of a phase-changing material of or on the surface or encapsulated within textures of the surface. The vapor cushion causes the flowing substance to be suspended over the surface, greatly reducing friction, drag, and adhesion between the flowing substance and the surface. The temperature of the flowing substance is above the sublimation point and/or melting point of the phase-changing material. The phase-changing material undergoes a phase change (evaporation or sublimation) upon contact with the flowing substance due to local heat transfer from the flowing substance to the material, generating a vapor cushion between the solid or liquid material and the flowing substance.

公开(公告)号：US20170356477A1

公开(公告)日：2017-12-14

申请号：US15417094

申请日：2017-01-26

Applicant: Massachusetts Institute of Technology

Inventor： Sushant Anand ,  Kripa K. Varanasi

IPC: F15D1/00 ,  B01L3/00

CPC classification number: F15D1/0065 ,  B01L3/502746 ,  B01L3/502769 ,  B01L2200/0626 ,  B01L2400/0469 ,  Y10T137/0391

Abstract: Methods described herein provide a way to reduce or eliminate drag and adhesion of a substance flowing over a surface by creating a vapor cushion via evaporation of a phase-changing material of or on the surface or encapsulated within textures of the surface. The vapor cushion causes the flowing substance to be suspended over the surface, greatly reducing friction, drag, and adhesion between the flowing substance and the surface. The temperature of the flowing substance is above the sublimation point and/or melting point of the phase-changing material. The phase-changing material undergoes a phase change (evaporation or sublimation) upon contact with the flowing substance due to local heat transfer from the flowing substance to the material, generating a vapor cushion between the solid or liquid material and the flowing substance.

公开(公告)号：US20170197187A1

公开(公告)日：2017-07-13

申请号：US15318349

申请日：2015-06-23

Applicant: Massachusetts Institute of Technology

Inventor： Sushant Anand ,  Seyed Reza Mahmoudi ,  Ingrid Fuller Guha ,  Kripa Kiran Varanasi

IPC: B01F3/08 ,  A61K9/107 ,  B01F17/00

CPC classification number: B01F3/0811 ,  A61K9/107 ,  A61K9/1075 ,  B01F17/00 ,  B01F2003/0823 ,  B01F2003/0838 ,  B01F2003/0842

Abstract: Nanoscale emulsions can be made by means of condensing a liquid vapor onto another liquid. The precise size, chemical composition, and density of emulsions may be controlled through varying the experimental parameters, such as surfactant concentration, time of condensation, humidity, and temperature.