Coextrusion is an alternative form of atomization for microencapsulation using annular-jet technology. Using a concentric nozzle system, the annular jet first forms the core-shell droplets through axisymmetric breakup. The outer-shell droplet then solidifies to form a microcapsule shell. Southwest Research Institute offers multiple configurations, including stationary, vibrating nozzle, centrifugal, submerged nozzle, electrohydrodynamic (EHD) and microfluidic chip coextrusion.
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Laboratories & Instruments
SwRI’s coextrusion equipment and processes offer a wide range of options for preparing microcapsules and microspheres. We offer both custom and off-the-shelf equipment from lab to pilot scales to support research and development efforts.
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Microencapsulation with coextrusion
- Core-shell and matrix morphologies
- Narrow size distribution, monodisperse
- Particle sizes from <1 µm to 10 mm
- Liquid and gas (rare) cores
- Variable shell thickness
- Variable payload composition
- Aqueous, solvent or melt-based feedstocks
- Production rates of µL/hr to L/hr
For additional information, please contact James Oxley at +1 210 522 2913 and Joseph Persyn at +1 210 522 2691 or visit Microencapsulation Techniques.