SOUTHWEST RESEARCH INSTITUTE

Atomization

Extrusion

Nanoencapsulation

Chemical Techniques

Encapsulation Process Comparison

Encapsulation Process Applications:

Pharmaceuticals

Food & Nutraceuticals

Consumer & Diversified Products

Agricultural & Industrial

Encapsulation Release Mechanisms

Product Characterization

Microencapsulation Requirements Form

Contact Us

SwRI Information

Home

	Vibrating nozzle systems produce microcapsules or microspheres with a very narrow size distribution.

• Stationary nozzle

• Centrifugal extrusion

• Vibrating nozzle

• Submerged nozzle

• Electrohydrodynamics

• Single or twin-screw extrusion

• Microextrusion

Extrusion processes produce matrix or core-shell morphologies, depending on nozzle configuration. Particle extrusion processes produce narrowly distributed particles. SwRI scientists have innovated particle extrusion processes to:

Stationary and submerged nozzles produce capsules of oils or aqueous fill materials using waxes or hydrophilic and lipophilic polymers. View high-speed video in Windows Media or QuickTime

• Produce capsules down to sub-micron sizes with small particle size variances

• Operate with complex thermal profiles

• Support production capacity

Fiber extrusion processes produce single or multiple fibers with diameters down to several hundred nanometers. SwRI personnel have devised fiber extrusion processes to produce:

• Matrix fibers

• Core-shell fibers

• Multilayer, fibrous structures

Extrusion Applications

• Narrow size distributions

• Core-shell morphologies

• Gas, liquid or solid cores

• Variable shell thickness

• Variable payload composition

  	These oil-filled microcapsules were produced with centrifugal coextrusion.

Extrusion Characteristics

• Sizes from1 micron to 10,000 microns

• Narrow size distribution

• Material versatility

• Scalability and high production capacity

• Continuous production

For more information about microencapsulation or nanoencapsulation extrusion capabilities at SwRI or how you can contract with SwRI, please fill out and submit the Microencapsulation Requirements form or contact Joseph Persyn, M.S., at jpersyn@swri.org or (210) 522-2691, or James Oxley, Ph.D., at joxley@swri.org or (210) 522-2913.
 

| Microencapsulation and Nanomaterials Department | Chemistry & Chemical Engineering Division | SwRI Home |

Southwest Research Institute^® (SwRI^®), headquartered in San Antonio, Texas, is a multidisciplinary, independent, nonprofit, applied engineering and physical sciences research and development organization with 12 technical divisions.

October 26, 2009