Encapsulation Release Mechanisms
Mechanically ruptured microcapsules are used to manufacture paper products such as scratch and sniff items and carbonless copy paper.
Osmotic release is triggered by the absorption of water into the microcapsule core. Subsequent swelling ruptures the microcapsule shell.
Click image for enlarged view
Particle size is one of many parameters that may be adjusted to control release rates of encapsulated ingredients.
To achieve one or more release mechanisms to meet product performance requirements, Southwest Research Institute (SwRI) scientists develop particle and capsule formulations and routinely fine tunes these formulations and their particle properties to tailor release rate and/or release profile.
Common Controlled Release Profiles
- Triggered release
- Release occurs due to a change in environment, such
- Electromagnetic changes
- This is used to achieve immediate, delayed or pulsatile release profiles.
- Release occurs due to a change in environment, such as:
- Sustained release
- Release occurs for an extended period of time.
- This can be used to achieve constant active ingredient exposure for a fixed period.
- Burst release
- Combination release profiles
- Molecular trigger (such as pH)
microencapsulation • nanoencapsulation • encapsulation • release mechanisms • controlled release • osmotic release • microcapsules • capsule formulations