Stable jets of viscoelastic fluids and self-assembled cylindrical capsules by hydrodynamic focusing.
We demonstrate formation of long-lived cylindrical jets of a viscoelastic fluid using hydrodynamic focusing. A solution of polyacrylamide in water is driven coaxially with immiscible oil and subjected to strong extensional flow. At high flow rates, the aqueous phase forms jets that are 4-90 microm in diameter and several centimeters long. The liquid surfaces of these jets are then used as templates for assembly of microspheres into novel rigid and hollow cylinders.
Edmond
K V
KV
Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA.
Schofield
A B
AB
Marquez
Manuel
M
Rothstein
J P
JP
Dinsmore
A D
AD
D000180:Acrylic Resins / Q000737:chemistry; D002214:Capsules / Q000737:chemistry; D003102:Colloids; D004548:Elasticity; D019904:Polymethyl Methacrylate / Q000737:chemistry; D014783:Viscosity; D014867:Water / Q000737:chemistry*; D000099166:Polyacrylamides
D000180:Acrylic Resins; D002214:Capsules; D003102:Colloids; D019904:Polymethyl Methacrylate; D014867:Water; D000099166:Polyacrylamides